Owner: AGL Energy Limited
Status:
Technology Type: Storage - Battery
Fuel Type: Other - Other
DUID:
Capacity: 0 MW
Full Commercial Use Date:
Expected Closure Year:
Closure Date:
29 May 2026 04:00 → 30 May 2026 04:00 AEST · data through 30 May 2026, 04:00
| Capex total | $422.96M |
|---|---|
| Capex / MW | $1,566,500 |
| Capex / MWh storage | $391,625 |
| Fixed OPEX (annual) | $5.72M |
| Fixed OPEX / MW-yr | $21,200 |
| Variable OPEX / MWh | $0.00 |
| Fuel cost / GJ | — |
| Heat rate GJ/MWh | — |
Confidence: medium · Status: ai estimated · Capex basis: estimated · AI checked 04 Jun 2026
Notes: Barn Hill BESS is a publicly announced, not-yet-committed AGL battery project in South Australia. AGL states the broader Barn Hill Wind Farm and Battery Project includes up to 270 MW of battery capacity with up to 4 hours duration, and AEMO lists Barn Hill BESS as 270 MW / 1,080 MWh in the October 2025 South Australian Electricity Report. No Barn Hill-specific capex, EPC contract, financing close, DUID, FID, O&M contract, battery supplier, or commissioning date was found. Capex is therefore estimated from Aurecon/AEMO 2024 Energy Technology Cost and Technical Parameter Review for a 200 MW 4-hour large-scale lithium-ion BESS co-located with a large renewable installation: $471/kW power component + $274/kWh energy component + scaled land/development cost. A dedicated-grid-connection benchmark from the same source would imply about AUD 451.2 million, so the selected AUD 436.6 million should be treated as an indicative 2025 planning estimate, not reported project cost. Fixed opex uses Aurecon's 4-hour BESS fixed O&M of AUD 12,800/MW-year plus indicative 20-year extended warranty of AUD 8,400/MW-year, scaled to 270 MW. Variable O&M is left null because Aurecon states BESS long-term service agreements are not typically fixed/variable. For asset life, AGL states about 35 years for the overall wind farm and battery project, but the BESS-specific Aurecon assumption is 20 years economic/technical life, potentially extendable to about 25 years or further with battery upgrades; the BESS-specific 20-year value is used in the financial profile. Emissions intensity is recorded as zero direct operational emissions, consistent with regulatory treatment of BESS as storing electricity rather than generating emissions; lifecycle and grid-charging emissions are not included.
[AI 2026-06-04] Barn Hill BESS is publicly announced/development-stage, not yet committed, and no Barn Hill-specific EPC, capex, O&M, warranty, tolling or closure cost disclosure was found. AGL states the Barn Hill project includes up to 360 MW wind, a new 275 kV transmission connection, and, at a later stage, a 270 MW battery with up to 4 hours storage. AEMO's 2025 South Australian Electricity Report lists Barn Hill BESS as a publicly announced storage development with 270 MW and 1,080 MWh. The capex estimate scales Aurecon's 2024/2025 AEMO benchmark standalone 200 MW / 800 MWh 4-hour lithium-ion BESS total EPC plus land/development cost of AUD 334.1 million to 270 MW / 1,080 MWh: 334.1m * 270/200 = AUD 451.035m. This excludes project-specific transmission, taxes/import duties, interest during construction and contingency per Aurecon assumptions, and may not capture Barn Hill-specific sharing of infrastructure with the wind farm. Fixed O&M is based on Aurecon's 4-hour BESS fixed O&M plus 20-year extended warranty: AUD 12,800/MW-net-year + AUD 8,400/MW-net-year = AUD 21,200/MW-net-year; scaled to 270 MW gives AUD 5.724m/year. Variable O&M is treated as zero/unallocated because Aurecon reports BESS long-term service agreements are not typically structured as fixed/variable. Efficiency is beginning-of-life round-trip efficiency at point of connection for 4-hour BESS. Asset-life assumption uses the BESS 20-year warranty/design-life basis from Aurecon/CSIRO; AGL separately states an overall Barn Hill Wind Farm and Battery Project asset life of about 35 years, which may refer to the integrated project/wind asset rather than battery cell life. Development/closure note: AGL states development approval was granted on 31 January 2025 and that the battery investment decision is expected after the wind farm and associated infrastructure FID; no closure date was identified.
[AI 2026-06-04] Barn Hill BESS is not yet registered with a DUID in the sources found. AEMO lists it as a publicly announced South Australian storage development of 270 MW / 1,080 MWh, not committed or anticipated. AGL's July 2025 project factsheet says the wind farm, battery and associated infrastructure received development consent on 31 January 2025, but the battery has a different development timeline and its investment decision is expected later than the wind farm FID. No Barn Hill BESS-specific capex, O&M, heat-rate/efficiency, or battery augmentation contract was found. Capex is therefore estimated by scaling Aurecon/AEMO's 2024 4-hour co-located Li-ion BESS EPC benchmark for a 200 MW / 800 MWh project to 270 MW / 1,080 MWh. This estimated capex excludes the wider Barn Hill wind farm and transmission scope and may exclude or only partly include land/development costs. Fixed opex uses Aurecon's 4-hour BESS fixed O&M plus 20-year extended warranty allowance (12,800 + 8,400 = 21,200 AUD/MW-year). Variable O&M is set to 0 AUD/MWh because Aurecon reports no separate variable O&M for BESS long-term service agreements. Efficiency is 85% round-trip efficiency at beginning of life for a 4-hour BESS. Direct operating emissions are assumed zero for the battery itself; charging-energy emissions depend on source and dispatch and are not reflected. Asset life uses Aurecon's 20-year BESS design/technical life; AGL states about 35 years for the broader Barn Hill Wind Farm and Battery Project, creating a project-vs-battery-life distinction. Major refurbishment/closure note: Aurecon says BESS life may be extended to about 25 years after condition assessment and thereafter by battery upgrades; AGL says project end-of-life decommissioning/rehabilitation would occur under a Decommissioning and Rehabilitation Plan.
Model: gpt-5.5 · Reasoning: medium · Fetched 04 Jun 2026 08:26 · ID: resp_0ad0fbbc69fcd710006a20a9b7d7a481958c7f9c867a8eeb93
{
"generator_identity": {
"site_name": "Barn Hill BESS",
"duid": null,
"owner": "AGL Energy Limited",
"region": "SA",
"technology_type": "Storage - Battery",
"fuel_type": "Other - Other"
},
"financial_profile": {
"generator_type_normalised": "battery",
"capex_total_aud": 422955000,
"capex_year": 2024,
"capex_basis": "estimated",
"capex_per_mw_aud": 1566500,
"capex_per_mwh_aud": 391625,
"fixed_opex_annual_aud": 5724000,
"fixed_opex_per_mw_year_aud": 21200,
"variable_opex_per_mwh_aud": 0,
"fuel_cost_per_gj_aud": null,
"fuel_contract_notes": "No fuel contract identified. As a battery, Barn Hill BESS has no thermal fuel input; charging energy is expected to come from the co-located wind project and/or the NEM. AGL describes the BESS rationale as time-shifting low-cost wind power, but no generator-specific charging/offtake contract was found.",
"heat_rate_gj_per_mwh": null,
"efficiency_pct": 85,
"emissions_intensity_tco2_mwh": 0,
"asset_life_years": 20,
"discount_rate_pct": null,
"source_confidence": "medium",
"data_status": "partially_verified",
"notes": "Barn Hill BESS is not yet registered with a DUID in the sources found. AEMO lists it as a publicly announced South Australian storage development of 270 MW / 1,080 MWh, not committed or anticipated. AGL's July 2025 project factsheet says the wind farm, battery and associated infrastructure received development consent on 31 January 2025, but the battery has a different development timeline and its investment decision is expected later than the wind farm FID. No Barn Hill BESS-specific capex, O&M, heat-rate/efficiency, or battery augmentation contract was found. Capex is therefore estimated by scaling Aurecon/AEMO's 2024 4-hour co-located Li-ion BESS EPC benchmark for a 200 MW / 800 MWh project to 270 MW / 1,080 MWh. This estimated capex excludes the wider Barn Hill wind farm and transmission scope and may exclude or only partly include land/development costs. Fixed opex uses Aurecon's 4-hour BESS fixed O&M plus 20-year extended warranty allowance (12,800 + 8,400 = 21,200 AUD/MW-year). Variable O&M is set to 0 AUD/MWh because Aurecon reports no separate variable O&M for BESS long-term service agreements. Efficiency is 85% round-trip efficiency at beginning of life for a 4-hour BESS. Direct operating emissions are assumed zero for the battery itself; charging-energy emissions depend on source and dispatch and are not reflected. Asset life uses Aurecon's 20-year BESS design/technical life; AGL states about 35 years for the broader Barn Hill Wind Farm and Battery Project, creating a project-vs-battery-life distinction. Major refurbishment/closure note: Aurecon says BESS life may be extended to about 25 years after condition assessment and thereafter by battery upgrades; AGL says project end-of-life decommissioning/rehabilitation would occur under a Decommissioning and Rehabilitation Plan."
},
"sources": [
{
"field_name": "capacity_and_storage_status",
"value_text": "Barn Hill BESS listed as a publicly announced storage development: 270 MW and 1,080 MWh.",
"value_numeric": 270,
"unit": "MW",
"source_url": "https://www.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/sa_advisory/2025/2025-south-australian-electricity-report.pdf?rev=40d5c6a3cece40d3abca846a51c16aa8&sc_lang=en",
"source_title": "2025 South Australian Electricity Report",
"publisher": "Australian Energy Market Operator",
"published_date": "2025",
"confidence": "high",
"raw_excerpt": "Barn Hill BESS 270 1080",
"ai_summary": "AEMO identifies Barn Hill BESS as a publicly announced South Australian storage development with 270 MW nameplate capacity and 1,080 MWh storage capacity."
},
{
"field_name": "project_scope_and_development_timeline",
"value_text": "AGL is developing a wind farm up to 360 MW with a later-stage 270 MW, 4-hour battery; battery FID expected later than wind farm FID.",
"value_numeric": 270,
"unit": "MW",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf",
"source_title": "Barn Hill Wind Farm and Battery Project - July 2025",
"publisher": "AGL Energy Limited",
"published_date": "2025-07",
"confidence": "high",
"raw_excerpt": "Battery* Up to 270MW – 4 hours duration",
"ai_summary": "AGL's July 2025 factsheet confirms the proposed battery size and duration and states the battery investment decision is on a later timeline than the wind farm."
},
{
"field_name": "development_approval_and_online_timing",
"value_text": "Development consent was dated 31 January 2025 for wind farm, battery and associated infrastructure; operations for wind farm and associated infrastructure are targeted for late 2028, but the battery is staged later.",
"value_numeric": 2025,
"unit": "year",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf",
"source_title": "Barn Hill Wind Farm and Battery Project - July 2025",
"publisher": "AGL Energy Limited",
"published_date": "2025-07",
"confidence": "high",
"raw_excerpt": "Development Consent ... 31 January 2025",
"ai_summary": "AGL reports development consent for the overall project, while noting the battery has a separate development timeline and later investment decision."
},
{
"field_name": "capex_total_aud",
"value_text": "Estimated EPC capex for a co-located 4-hour Li-ion BESS scaled to 270 MW / 1,080 MWh: 422,955,000 AUD, 2024 cost basis.",
"value_numeric": 422955000,
"unit": "AUD",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Total EPC cost $M ... 313.3 ... co-located with large renewable installation",
"ai_summary": "Aurecon provides a 2024 benchmark EPC cost of AUD 313.3 million for a 200 MW / 800 MWh 4-hour co-located Li-ion BESS; this was linearly scaled by capacity to Barn Hill's 270 MW / 1,080 MWh configuration."
},
{
"field_name": "capex_per_mw_aud",
"value_text": "Estimated co-located 4-hour BESS EPC capex: 1,566,500 AUD/MW, derived from Aurecon 313.3 million AUD for 200 MW.",
"value_numeric": 1566500,
"unit": "AUD/MW",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Total EPC cost $M ... 313.3",
"ai_summary": "The per-MW capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 200 MW benchmark project size."
},
{
"field_name": "capex_per_mwh_aud",
"value_text": "Estimated co-located 4-hour BESS EPC capex: 391,625 AUD/MWh, derived from Aurecon 313.3 million AUD for 800 MWh.",
"value_numeric": 391625,
"unit": "AUD/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Energy Capacity MWh ... 800 ... Total EPC cost $M ... 313.3",
"ai_summary": "The per-MWh capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 800 MWh benchmark energy capacity."
},
{
"field_name": "whole_project_estimated_development_cost_context",
"value_text": "A non-primary market report states the full Barn Hill wind farm, BESS, transmission and associated facilities project had an estimated development cost of 2,120 million AUD; not used as the battery capex assumption.",
"value_numeric": 2120000000,
"unit": "AUD",
"source_url": "https://www.altenergy.com.au/newsandviews/show/84/after-a-pause-sa-planners-receive-burst-of-new-development-applications",
"source_title": "After a pause, SA planners receive burst of new development applications",
"publisher": "AltEnergy",
"published_date": null,
"confidence": "low",
"raw_excerpt": "The project has an estimated development cost of $2120 million.",
"ai_summary": "This appears to refer to the entire Barn Hill project, including wind, BESS, transmission and other infrastructure, so it was not allocated directly to the BESS."
},
{
"field_name": "fixed_opex_per_mw_year_aud",
"value_text": "Estimated fixed opex including extended warranty: 21,200 AUD/MW-year for 4-hour Li-ion BESS.",
"value_numeric": 21200,
"unit": "AUD/MW-year",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Fixed O&M Cost ... 12,800 ... Extended warranty ... 8,400",
"ai_summary": "Aurecon reports 12,800 AUD/MW-year fixed O&M and 8,400 AUD/MW-year for a 20-year extended warranty for a 4-hour BESS; combined value used for fixed opex."
},
{
"field_name": "fixed_opex_annual_aud",
"value_text": "Estimated annual fixed opex including extended warranty: 5,724,000 AUD/year for 270 MW.",
"value_numeric": 5724000,
"unit": "AUD/year",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Total annual O&M Cost ... Fixed O&M + extended warranties",
"ai_summary": "Annual fixed opex is calculated as 270 MW multiplied by the combined 21,200 AUD/MW-year fixed O&M plus extended warranty benchmark."
},
{
"field_name": "variable_opex_per_mwh_aud",
"value_text": "No separate variable O&M assumed for BESS; set to 0 AUD/MWh.",
"value_numeric": 0,
"unit": "AUD/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Variable O&M Cost ... - ... BESS long term service agreements not typically based on fixed / variable.",
"ai_summary": "Aurecon does not provide a separate variable O&M value for BESS, explaining that service agreements are not typically structured on a fixed/variable split."
},
{
"field_name": "fuel_cost_or_contract_details",
"value_text": "No fuel cost. AGL states the BESS can improve economics by time-shifting low-cost wind power; no specific charging contract found.",
"value_numeric": null,
"unit": null,
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg",
"source_title": "Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024",
"publisher": "AGL Energy Limited",
"published_date": "2024-04",
"confidence": "medium",
"raw_excerpt": "time shifting low-cost wind power",
"ai_summary": "AGL describes the battery as supporting project economics by shifting wind output, but does not disclose a fuel or charging-energy contract."
},
{
"field_name": "efficiency_pct",
"value_text": "Estimated 85% beginning-of-life round-trip efficiency for a 4-hour Li-ion BESS at the point of connection including auxiliaries.",
"value_numeric": 85,
"unit": "%",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Round trip efficiency ... % ... 85 ... Typical round trip efficiency",
"ai_summary": "Aurecon's 4-hour Li-ion BESS benchmark assumes 85% beginning-of-life round-trip efficiency at the point of connection including auxiliaries."
},
{
"field_name": "heat_rate_gj_per_mwh",
"value_text": "Not applicable for battery storage because there is no thermal fuel conversion heat rate.",
"value_numeric": null,
"unit": "GJ/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "high",
"raw_excerpt": "Technology Li-ion",
"ai_summary": "Aurecon classifies the benchmark technology as Li-ion BESS, for which round-trip efficiency is applicable rather than thermal heat rate."
},
{
"field_name": "emissions_intensity_tco2_mwh",
"value_text": "Direct operating emissions assumed 0 tCO2/MWh for the battery itself; charging-energy emissions are excluded and dispatch-dependent.",
"value_numeric": 0,
"unit": "tCO2/MWh",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg",
"source_title": "Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024",
"publisher": "AGL Energy Limited",
"published_date": "2024-04",
"confidence": "medium",
"raw_excerpt": "Battery Energy Storage System (BESS)",
"ai_summary": "Because Barn Hill BESS is an electrochemical storage system with no on-site combustion, direct emissions are assumed zero; indirect emissions depend on charging energy."
},
{
"field_name": "asset_life_years_bess_assumption",
"value_text": "20-year economic/design life and 20-year technical/operational life for large-scale Li-ion BESS; possible extension to around 25 years after condition assessment.",
"value_numeric": 20,
"unit": "years",
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Economic Life ... Years 20 ... Technical Life ... Years 20",
"ai_summary": "Aurecon's 4-hour Li-ion BESS benchmark assumes a 20-year life, with potential extension to about 25 years depending on condition assessment and later battery upgrades."
},
{
"field_name": "asset_life_years_project_statement",
"value_text": "AGL states the broader Barn Hill Wind Farm and Battery Project has an asset life of about 35 years.",
"value_numeric": 35,
"unit": "years",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf",
"source_title": "Barn Hill Wind Farm and Battery Project - July 2025",
"publisher": "AGL Energy Limited",
"published_date": "2025-07",
"confidence": "high",
"raw_excerpt": "Asset life About 35 years",
"ai_summary": "AGL's project-level asset life is longer than the BESS technology default and appears to refer to the overall project, especially the wind farm and associated infrastructure."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "BESS life may be extended after condition assessment and later battery upgrades; AGL states project decommissioning and rehabilitation plan would govern end of life.",
"value_numeric": null,
"unit": null,
"source_url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en",
"source_title": "2024 Energy Technology Cost and Technical Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2024-12-06",
"confidence": "medium",
"raw_excerpt": "Life may potentially be extended to approx. 25 years",
"ai_summary": "Aurecon notes BESS operational life can potentially be extended after condition assessment, with further life extension through battery upgrades."
},
{
"field_name": "major_refurbishment_or_closure_notes_project",
"value_text": "At project end-of-life, AGL says decommissioning and dismantling would be undertaken under a detailed Decommissioning and Rehabilitation Plan.",
"value_numeric": null,
"unit": null,
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf",
"source_title": "Barn Hill Wind Farm and Battery Project - July 2025",
"publisher": "AGL Energy Limited",
"published_date": "2025-07",
"confidence": "high",
"raw_excerpt": "Decommissioning and Rehabilitation Plan",
"ai_summary": "AGL provides a project-level end-of-life statement covering decommissioning, dismantling and rehabilitation planning."
},
{
"field_name": "owner_and_pipeline_context",
"value_text": "AGL's FY25 annual report includes Barn Hill Wind Farm Pty Ltd as a 100% owned Australian body corporate and shows Barn Hill Wind Farm in the development pipeline.",
"value_numeric": 100,
"unit": "%",
"source_url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/company-docs/250813-2-agl-energy-limited-annual-report-2025.pdf",
"source_title": "AGL Energy Limited Annual Report 2025",
"publisher": "AGL Energy Limited",
"published_date": "2025-08-13",
"confidence": "high",
"raw_excerpt": "Barn Hill Wind Farm Pty Ltd ... Australia 100",
"ai_summary": "AGL's annual report supports AGL ownership/control context for the Barn Hill development entity and identifies Barn Hill in its development pipeline."
}
],
"warnings": [
"No registered DUID was found for Barn Hill BESS; it appears to remain a publicly announced development rather than an in-service or committed NEM unit.",
"No Barn Hill BESS-specific final investment decision, EPC contract, OEM selection, project finance, or construction capex announcement was found; capex and opex values are therefore estimates from AEMO/Aurecon technology benchmarks.",
"AGL's 35-year asset life is project-level and likely driven by the broader wind farm/infrastructure scope; the financial profile uses a 20-year battery life benchmark for the BESS itself.",
"Estimated capex is for a co-located 4-hour Li-ion BESS EPC benchmark scaled linearly to 270 MW / 1,080 MWh; it is not a reported Barn Hill battery construction budget and may exclude land/development, financing, owner’s costs, and battery augmentation beyond warranty assumptions.",
"Variable O&M is represented as 0 AUD/MWh because the benchmark source reports no separate BESS variable O&M; this should be reviewed if an actual LTSA/O&M contract becomes available.",
"Direct emissions intensity is set to zero for on-site battery operation only; lifecycle and charging-energy emissions are not included."
]
}
{
"meta": {
"model": "gpt-5.5",
"reasoning_effort": "medium",
"response_id": "resp_0ad0fbbc69fcd710006a20a9b7d7a481958c7f9c867a8eeb93",
"fetched_at": "2026-06-04T08:26:45+10:00"
},
"raw_text": "{\"generator_identity\":{\"site_name\":\"Barn Hill BESS\",\"duid\":null,\"owner\":\"AGL Energy Limited\",\"region\":\"SA\",\"technology_type\":\"Storage - Battery\",\"fuel_type\":\"Other - Other\"},\"financial_profile\":{\"generator_type_normalised\":\"battery\",\"capex_total_aud\":422955000,\"capex_year\":2024,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":1566500,\"capex_per_mwh_aud\":391625,\"fixed_opex_annual_aud\":5724000,\"fixed_opex_per_mw_year_aud\":21200,\"variable_opex_per_mwh_aud\":0,\"fuel_cost_per_gj_aud\":null,\"fuel_contract_notes\":\"No fuel contract identified. As a battery, Barn Hill BESS has no thermal fuel input; charging energy is expected to come from the co-located wind project and/or the NEM. AGL describes the BESS rationale as time-shifting low-cost wind power, but no generator-specific charging/offtake contract was found.\",\"heat_rate_gj_per_mwh\":null,\"efficiency_pct\":85,\"emissions_intensity_tco2_mwh\":0,\"asset_life_years\":20,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Barn Hill BESS is not yet registered with a DUID in the sources found. AEMO lists it as a publicly announced South Australian storage development of 270 MW / 1,080 MWh, not committed or anticipated. AGL's July 2025 project factsheet says the wind farm, battery and associated infrastructure received development consent on 31 January 2025, but the battery has a different development timeline and its investment decision is expected later than the wind farm FID. No Barn Hill BESS-specific capex, O&M, heat-rate/efficiency, or battery augmentation contract was found. Capex is therefore estimated by scaling Aurecon/AEMO's 2024 4-hour co-located Li-ion BESS EPC benchmark for a 200 MW / 800 MWh project to 270 MW / 1,080 MWh. This estimated capex excludes the wider Barn Hill wind farm and transmission scope and may exclude or only partly include land/development costs. Fixed opex uses Aurecon's 4-hour BESS fixed O&M plus 20-year extended warranty allowance (12,800 + 8,400 = 21,200 AUD/MW-year). Variable O&M is set to 0 AUD/MWh because Aurecon reports no separate variable O&M for BESS long-term service agreements. Efficiency is 85% round-trip efficiency at beginning of life for a 4-hour BESS. Direct operating emissions are assumed zero for the battery itself; charging-energy emissions depend on source and dispatch and are not reflected. Asset life uses Aurecon's 20-year BESS design/technical life; AGL states about 35 years for the broader Barn Hill Wind Farm and Battery Project, creating a project-vs-battery-life distinction. Major refurbishment/closure note: Aurecon says BESS life may be extended to about 25 years after condition assessment and thereafter by battery upgrades; AGL says project end-of-life decommissioning/rehabilitation would occur under a Decommissioning and Rehabilitation Plan.\"},\"sources\":[{\"field_name\":\"capacity_and_storage_status\",\"value_text\":\"Barn Hill BESS listed as a publicly announced storage development: 270 MW and 1,080 MWh.\",\"value_numeric\":270,\"unit\":\"MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/sa_advisory/2025/2025-south-australian-electricity-report.pdf?rev=40d5c6a3cece40d3abca846a51c16aa8&sc_lang=en\",\"source_title\":\"2025 South Australian Electricity Report\",\"publisher\":\"Australian Energy Market Operator\",\"published_date\":\"2025\",\"confidence\":\"high\",\"raw_excerpt\":\"Barn Hill BESS 270 1080\",\"ai_summary\":\"AEMO identifies Barn Hill BESS as a publicly announced South Australian storage development with 270 MW nameplate capacity and 1,080 MWh storage capacity.\"},{\"field_name\":\"project_scope_and_development_timeline\",\"value_text\":\"AGL is developing a wind farm up to 360 MW with a later-stage 270 MW, 4-hour battery; battery FID expected later than wind farm FID.\",\"value_numeric\":270,\"unit\":\"MW\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Battery* Up to 270MW – 4 hours duration\",\"ai_summary\":\"AGL's July 2025 factsheet confirms the proposed battery size and duration and states the battery investment decision is on a later timeline than the wind farm.\"},{\"field_name\":\"development_approval_and_online_timing\",\"value_text\":\"Development consent was dated 31 January 2025 for wind farm, battery and associated infrastructure; operations for wind farm and associated infrastructure are targeted for late 2028, but the battery is staged later.\",\"value_numeric\":2025,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Development Consent ... 31 January 2025\",\"ai_summary\":\"AGL reports development consent for the overall project, while noting the battery has a separate development timeline and later investment decision.\"},{\"field_name\":\"capex_total_aud\",\"value_text\":\"Estimated EPC capex for a co-located 4-hour Li-ion BESS scaled to 270 MW / 1,080 MWh: 422,955,000 AUD, 2024 cost basis.\",\"value_numeric\":422955000,\"unit\":\"AUD\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total EPC cost $M ... 313.3 ... co-located with large renewable installation\",\"ai_summary\":\"Aurecon provides a 2024 benchmark EPC cost of AUD 313.3 million for a 200 MW / 800 MWh 4-hour co-located Li-ion BESS; this was linearly scaled by capacity to Barn Hill's 270 MW / 1,080 MWh configuration.\"},{\"field_name\":\"capex_per_mw_aud\",\"value_text\":\"Estimated co-located 4-hour BESS EPC capex: 1,566,500 AUD/MW, derived from Aurecon 313.3 million AUD for 200 MW.\",\"value_numeric\":1566500,\"unit\":\"AUD/MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total EPC cost $M ... 313.3\",\"ai_summary\":\"The per-MW capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 200 MW benchmark project size.\"},{\"field_name\":\"capex_per_mwh_aud\",\"value_text\":\"Estimated co-located 4-hour BESS EPC capex: 391,625 AUD/MWh, derived from Aurecon 313.3 million AUD for 800 MWh.\",\"value_numeric\":391625,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Energy Capacity MWh ... 800 ... Total EPC cost $M ... 313.3\",\"ai_summary\":\"The per-MWh capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 800 MWh benchmark energy capacity.\"},{\"field_name\":\"whole_project_estimated_development_cost_context\",\"value_text\":\"A non-primary market report states the full Barn Hill wind farm, BESS, transmission and associated facilities project had an estimated development cost of 2,120 million AUD; not used as the battery capex assumption.\",\"value_numeric\":2120000000,\"unit\":\"AUD\",\"source_url\":\"https://www.altenergy.com.au/newsandviews/show/84/after-a-pause-sa-planners-receive-burst-of-new-development-applications\",\"source_title\":\"After a pause, SA planners receive burst of new development applications\",\"publisher\":\"AltEnergy\",\"published_date\":null,\"confidence\":\"low\",\"raw_excerpt\":\"The project has an estimated development cost of $2120 million.\",\"ai_summary\":\"This appears to refer to the entire Barn Hill project, including wind, BESS, transmission and other infrastructure, so it was not allocated directly to the BESS.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Estimated fixed opex including extended warranty: 21,200 AUD/MW-year for 4-hour Li-ion BESS.\",\"value_numeric\":21200,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost ... 12,800 ... Extended warranty ... 8,400\",\"ai_summary\":\"Aurecon reports 12,800 AUD/MW-year fixed O&M and 8,400 AUD/MW-year for a 20-year extended warranty for a 4-hour BESS; combined value used for fixed opex.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"Estimated annual fixed opex including extended warranty: 5,724,000 AUD/year for 270 MW.\",\"value_numeric\":5724000,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total annual O&M Cost ... Fixed O&M + extended warranties\",\"ai_summary\":\"Annual fixed opex is calculated as 270 MW multiplied by the combined 21,200 AUD/MW-year fixed O&M plus extended warranty benchmark.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"No separate variable O&M assumed for BESS; set to 0 AUD/MWh.\",\"value_numeric\":0,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Variable O&M Cost ... - ... BESS long term service agreements not typically based on fixed / variable.\",\"ai_summary\":\"Aurecon does not provide a separate variable O&M value for BESS, explaining that service agreements are not typically structured on a fixed/variable split.\"},{\"field_name\":\"fuel_cost_or_contract_details\",\"value_text\":\"No fuel cost. AGL states the BESS can improve economics by time-shifting low-cost wind power; no specific charging contract found.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg\",\"source_title\":\"Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2024-04\",\"confidence\":\"medium\",\"raw_excerpt\":\"time shifting low-cost wind power\",\"ai_summary\":\"AGL describes the battery as supporting project economics by shifting wind output, but does not disclose a fuel or charging-energy contract.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Estimated 85% beginning-of-life round-trip efficiency for a 4-hour Li-ion BESS at the point of connection including auxiliaries.\",\"value_numeric\":85,\"unit\":\"%\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Round trip efficiency ... % ... 85 ... Typical round trip efficiency\",\"ai_summary\":\"Aurecon's 4-hour Li-ion BESS benchmark assumes 85% beginning-of-life round-trip efficiency at the point of connection including auxiliaries.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"Not applicable for battery storage because there is no thermal fuel conversion heat rate.\",\"value_numeric\":null,\"unit\":\"GJ/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"high\",\"raw_excerpt\":\"Technology Li-ion\",\"ai_summary\":\"Aurecon classifies the benchmark technology as Li-ion BESS, for which round-trip efficiency is applicable rather than thermal heat rate.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"Direct operating emissions assumed 0 tCO2/MWh for the battery itself; charging-energy emissions are excluded and dispatch-dependent.\",\"value_numeric\":0,\"unit\":\"tCO2/MWh\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg\",\"source_title\":\"Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2024-04\",\"confidence\":\"medium\",\"raw_excerpt\":\"Battery Energy Storage System (BESS)\",\"ai_summary\":\"Because Barn Hill BESS is an electrochemical storage system with no on-site combustion, direct emissions are assumed zero; indirect emissions depend on charging energy.\"},{\"field_name\":\"asset_life_years_bess_assumption\",\"value_text\":\"20-year economic/design life and 20-year technical/operational life for large-scale Li-ion BESS; possible extension to around 25 years after condition assessment.\",\"value_numeric\":20,\"unit\":\"years\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Economic Life ... Years 20 ... Technical Life ... Years 20\",\"ai_summary\":\"Aurecon's 4-hour Li-ion BESS benchmark assumes a 20-year life, with potential extension to about 25 years depending on condition assessment and later battery upgrades.\"},{\"field_name\":\"asset_life_years_project_statement\",\"value_text\":\"AGL states the broader Barn Hill Wind Farm and Battery Project has an asset life of about 35 years.\",\"value_numeric\":35,\"unit\":\"years\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Asset life About 35 years\",\"ai_summary\":\"AGL's project-level asset life is longer than the BESS technology default and appears to refer to the overall project, especially the wind farm and associated infrastructure.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"BESS life may be extended after condition assessment and later battery upgrades; AGL states project decommissioning and rehabilitation plan would govern end of life.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Life may potentially be extended to approx. 25 years\",\"ai_summary\":\"Aurecon notes BESS operational life can potentially be extended after condition assessment, with further life extension through battery upgrades.\"},{\"field_name\":\"major_refurbishment_or_closure_notes_project\",\"value_text\":\"At project end-of-life, AGL says decommissioning and dismantling would be undertaken under a detailed Decommissioning and Rehabilitation Plan.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Decommissioning and Rehabilitation Plan\",\"ai_summary\":\"AGL provides a project-level end-of-life statement covering decommissioning, dismantling and rehabilitation planning.\"},{\"field_name\":\"owner_and_pipeline_context\",\"value_text\":\"AGL's FY25 annual report includes Barn Hill Wind Farm Pty Ltd as a 100% owned Australian body corporate and shows Barn Hill Wind Farm in the development pipeline.\",\"value_numeric\":100,\"unit\":\"%\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/company-docs/250813-2-agl-energy-limited-annual-report-2025.pdf\",\"source_title\":\"AGL Energy Limited Annual Report 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-08-13\",\"confidence\":\"high\",\"raw_excerpt\":\"Barn Hill Wind Farm Pty Ltd ... Australia 100\",\"ai_summary\":\"AGL's annual report supports AGL ownership/control context for the Barn Hill development entity and identifies Barn Hill in its development pipeline.\"}],\"warnings\":[\"No registered DUID was found for Barn Hill BESS; it appears to remain a publicly announced development rather than an in-service or committed NEM unit.\",\"No Barn Hill BESS-specific final investment decision, EPC contract, OEM selection, project finance, or construction capex announcement was found; capex and opex values are therefore estimates from AEMO/Aurecon technology benchmarks.\",\"AGL's 35-year asset life is project-level and likely driven by the broader wind farm/infrastructure scope; the financial profile uses a 20-year battery life benchmark for the BESS itself.\",\"Estimated capex is for a co-located 4-hour Li-ion BESS EPC benchmark scaled linearly to 270 MW / 1,080 MWh; it is not a reported Barn Hill battery construction budget and may exclude land/development, financing, owner’s costs, and battery augmentation beyond warranty assumptions.\",\"Variable O&M is represented as 0 AUD/MWh because the benchmark source reports no separate BESS variable O&M; this should be reviewed if an actual LTSA/O&M contract becomes available.\",\"Direct emissions intensity is set to zero for on-site battery operation only; lifecycle and charging-energy emissions are not included.\"]}",
"raw_api": {
"id": "resp_0ad0fbbc69fcd710006a20a9b7d7a481958c7f9c867a8eeb93",
"object": "response",
"created_at": 1780525495,
"status": "completed",
"background": false,
"billing": {
"payer": "developer"
},
"completed_at": 1780525604,
"error": null,
"frequency_penalty": 0,
"incomplete_details": null,
"instructions": "You are a researcher of Australian NEM generator economics. You MUST use web search to find current, source-backed information before answering. Prefer official owner reports, AEMO documents, government sources, project finance announcements, annual reports, and investor presentations. Return only valid JSON matching the schema.",
"max_output_tokens": null,
"max_tool_calls": null,
"model": "gpt-5.5-2026-04-23",
"moderation": null,
"output": [
{
"id": "ws_0ad0fbbc69fcd710006a20a9b8a77c81959ece1a82928aa54e",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"Barn Hill BESS AGL 270 MW battery capex",
"AGL Barn Hill battery energy storage system 270 MW",
"Barn Hill BESS AEMO DUID AGL",
"AGL Barn Hill BESS construction cost"
],
"query": "Barn Hill BESS AGL 270 MW battery capex"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9bcdd5c81959c6f138ea5b102fe",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9bce70c81959469277b1705e276",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"AEMO 2025 IASR battery storage capex fixed O&M variable O&M 4 hour battery Australia",
"CSIRO GenCost 2025 battery storage capex fixed O&M variable O&M asset life Australia",
"AEMO Inputs Assumptions Scenarios Report 2025 battery storage cost assumptions fixed O&M",
"AGL FY25 annual report Barn Hill battery"
],
"query": "AEMO 2025 IASR battery storage capex fixed O&M variable O&M 4 hour battery Australia"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9c091d48195bc65e92a4c7f3595",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9c0a0b08195a60287d5ce4cf5d7",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9c13f2481958dddd1bc2237ddd2",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9c1ff908195928a59e7fb88d26a",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"Aurecon 2024 Energy Technology Cost and Technical Parameters Review battery storage fixed O&M capex pdf",
"\"2024 Energy Technology Cost and Technical Parameter Review\" \"Battery storage\" \"Fixed O&M\"",
"\"Large-scale battery\" \"fixed O&M\" \"Aurecon\" \"2024\"",
"\"Battery storage\" \"Variable O&M\" \"AEMO\" \"AUD/MWh\""
],
"query": "Aurecon 2024 Energy Technology Cost and Technical Parameters Review battery storage fixed O&M capex pdf"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9c652b881958a61a1866132f9f2",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9c6a7e08195a3aa448f5210c002",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "find_in_page",
"pattern": "Round trip",
"url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9c963f8819596682b66659c1bb1",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9c9aa1c8195b5da8a054612ed22",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9cd2e948195b4cfb8453d355c9a",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9cea04c8195880c8a0724993846",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"site:wa.aemo.com.au Barn Hill BESS DUID AGL 270MW",
"site:aemo.com.au \"Barn Hill\" \"Battery\" \"DUID\"",
"site:aemo.com.au \"Barn Hill\" \"270\" \"BESS\"",
"\"Barn Hill\" \"Generation Information\" \"AEMO\" \"270\""
],
"query": "site:wa.aemo.com.au Barn Hill BESS DUID AGL 270MW"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9d226d08195b295d137a8a8a305",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9d236d08195bbf4e595afc4f814",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "search",
"queries": [
"\"Barn Hill Wind Farm and Battery\" \"$\" \"AGL\"",
"\"Barn Hill Wind Farm and Battery Project\" \"capital\" \"cost\"",
"\"Barn Hill\" \"Battery\" \"development approval\" \"cost\"",
"\"Barn Hill Wind Farm and Battery\" \"estimated development cost\""
],
"query": "\"Barn Hill Wind Farm and Battery\" \"$\" \"AGL\""
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9d4ed508195bffd276142dc1b6b",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "ws_0ad0fbbc69fcd710006a20a9e3647481958f26c20f1dcbff47",
"type": "web_search_call",
"status": "completed",
"action": {
"type": "open_page",
"url": "https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoo0Swy_rxmOFlfJVhkNEYOCZXtIWUk1_gJ8RxVcgI0KaWhL7Y_8"
}
},
{
"id": "rs_0ad0fbbc69fcd710006a20a9e72ad88195b5ae920e9fe97a48",
"type": "reasoning",
"content": [],
"summary": []
},
{
"id": "msg_0ad0fbbc69fcd710006a20a9f6e6ec819595ad97e35a779b43",
"type": "message",
"status": "completed",
"content": [
{
"type": "output_text",
"annotations": [],
"logprobs": [],
"text": "{\"generator_identity\":{\"site_name\":\"Barn Hill BESS\",\"duid\":null,\"owner\":\"AGL Energy Limited\",\"region\":\"SA\",\"technology_type\":\"Storage - Battery\",\"fuel_type\":\"Other - Other\"},\"financial_profile\":{\"generator_type_normalised\":\"battery\",\"capex_total_aud\":422955000,\"capex_year\":2024,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":1566500,\"capex_per_mwh_aud\":391625,\"fixed_opex_annual_aud\":5724000,\"fixed_opex_per_mw_year_aud\":21200,\"variable_opex_per_mwh_aud\":0,\"fuel_cost_per_gj_aud\":null,\"fuel_contract_notes\":\"No fuel contract identified. As a battery, Barn Hill BESS has no thermal fuel input; charging energy is expected to come from the co-located wind project and/or the NEM. AGL describes the BESS rationale as time-shifting low-cost wind power, but no generator-specific charging/offtake contract was found.\",\"heat_rate_gj_per_mwh\":null,\"efficiency_pct\":85,\"emissions_intensity_tco2_mwh\":0,\"asset_life_years\":20,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Barn Hill BESS is not yet registered with a DUID in the sources found. AEMO lists it as a publicly announced South Australian storage development of 270 MW / 1,080 MWh, not committed or anticipated. AGL's July 2025 project factsheet says the wind farm, battery and associated infrastructure received development consent on 31 January 2025, but the battery has a different development timeline and its investment decision is expected later than the wind farm FID. No Barn Hill BESS-specific capex, O&M, heat-rate/efficiency, or battery augmentation contract was found. Capex is therefore estimated by scaling Aurecon/AEMO's 2024 4-hour co-located Li-ion BESS EPC benchmark for a 200 MW / 800 MWh project to 270 MW / 1,080 MWh. This estimated capex excludes the wider Barn Hill wind farm and transmission scope and may exclude or only partly include land/development costs. Fixed opex uses Aurecon's 4-hour BESS fixed O&M plus 20-year extended warranty allowance (12,800 + 8,400 = 21,200 AUD/MW-year). Variable O&M is set to 0 AUD/MWh because Aurecon reports no separate variable O&M for BESS long-term service agreements. Efficiency is 85% round-trip efficiency at beginning of life for a 4-hour BESS. Direct operating emissions are assumed zero for the battery itself; charging-energy emissions depend on source and dispatch and are not reflected. Asset life uses Aurecon's 20-year BESS design/technical life; AGL states about 35 years for the broader Barn Hill Wind Farm and Battery Project, creating a project-vs-battery-life distinction. Major refurbishment/closure note: Aurecon says BESS life may be extended to about 25 years after condition assessment and thereafter by battery upgrades; AGL says project end-of-life decommissioning/rehabilitation would occur under a Decommissioning and Rehabilitation Plan.\"},\"sources\":[{\"field_name\":\"capacity_and_storage_status\",\"value_text\":\"Barn Hill BESS listed as a publicly announced storage development: 270 MW and 1,080 MWh.\",\"value_numeric\":270,\"unit\":\"MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/sa_advisory/2025/2025-south-australian-electricity-report.pdf?rev=40d5c6a3cece40d3abca846a51c16aa8&sc_lang=en\",\"source_title\":\"2025 South Australian Electricity Report\",\"publisher\":\"Australian Energy Market Operator\",\"published_date\":\"2025\",\"confidence\":\"high\",\"raw_excerpt\":\"Barn Hill BESS 270 1080\",\"ai_summary\":\"AEMO identifies Barn Hill BESS as a publicly announced South Australian storage development with 270 MW nameplate capacity and 1,080 MWh storage capacity.\"},{\"field_name\":\"project_scope_and_development_timeline\",\"value_text\":\"AGL is developing a wind farm up to 360 MW with a later-stage 270 MW, 4-hour battery; battery FID expected later than wind farm FID.\",\"value_numeric\":270,\"unit\":\"MW\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Battery* Up to 270MW – 4 hours duration\",\"ai_summary\":\"AGL's July 2025 factsheet confirms the proposed battery size and duration and states the battery investment decision is on a later timeline than the wind farm.\"},{\"field_name\":\"development_approval_and_online_timing\",\"value_text\":\"Development consent was dated 31 January 2025 for wind farm, battery and associated infrastructure; operations for wind farm and associated infrastructure are targeted for late 2028, but the battery is staged later.\",\"value_numeric\":2025,\"unit\":\"year\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Development Consent ... 31 January 2025\",\"ai_summary\":\"AGL reports development consent for the overall project, while noting the battery has a separate development timeline and later investment decision.\"},{\"field_name\":\"capex_total_aud\",\"value_text\":\"Estimated EPC capex for a co-located 4-hour Li-ion BESS scaled to 270 MW / 1,080 MWh: 422,955,000 AUD, 2024 cost basis.\",\"value_numeric\":422955000,\"unit\":\"AUD\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total EPC cost $M ... 313.3 ... co-located with large renewable installation\",\"ai_summary\":\"Aurecon provides a 2024 benchmark EPC cost of AUD 313.3 million for a 200 MW / 800 MWh 4-hour co-located Li-ion BESS; this was linearly scaled by capacity to Barn Hill's 270 MW / 1,080 MWh configuration.\"},{\"field_name\":\"capex_per_mw_aud\",\"value_text\":\"Estimated co-located 4-hour BESS EPC capex: 1,566,500 AUD/MW, derived from Aurecon 313.3 million AUD for 200 MW.\",\"value_numeric\":1566500,\"unit\":\"AUD/MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total EPC cost $M ... 313.3\",\"ai_summary\":\"The per-MW capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 200 MW benchmark project size.\"},{\"field_name\":\"capex_per_mwh_aud\",\"value_text\":\"Estimated co-located 4-hour BESS EPC capex: 391,625 AUD/MWh, derived from Aurecon 313.3 million AUD for 800 MWh.\",\"value_numeric\":391625,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Energy Capacity MWh ... 800 ... Total EPC cost $M ... 313.3\",\"ai_summary\":\"The per-MWh capex assumption is derived from Aurecon's co-located 4-hour BESS EPC benchmark divided by the 800 MWh benchmark energy capacity.\"},{\"field_name\":\"whole_project_estimated_development_cost_context\",\"value_text\":\"A non-primary market report states the full Barn Hill wind farm, BESS, transmission and associated facilities project had an estimated development cost of 2,120 million AUD; not used as the battery capex assumption.\",\"value_numeric\":2120000000,\"unit\":\"AUD\",\"source_url\":\"https://www.altenergy.com.au/newsandviews/show/84/after-a-pause-sa-planners-receive-burst-of-new-development-applications\",\"source_title\":\"After a pause, SA planners receive burst of new development applications\",\"publisher\":\"AltEnergy\",\"published_date\":null,\"confidence\":\"low\",\"raw_excerpt\":\"The project has an estimated development cost of $2120 million.\",\"ai_summary\":\"This appears to refer to the entire Barn Hill project, including wind, BESS, transmission and other infrastructure, so it was not allocated directly to the BESS.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Estimated fixed opex including extended warranty: 21,200 AUD/MW-year for 4-hour Li-ion BESS.\",\"value_numeric\":21200,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost ... 12,800 ... Extended warranty ... 8,400\",\"ai_summary\":\"Aurecon reports 12,800 AUD/MW-year fixed O&M and 8,400 AUD/MW-year for a 20-year extended warranty for a 4-hour BESS; combined value used for fixed opex.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"Estimated annual fixed opex including extended warranty: 5,724,000 AUD/year for 270 MW.\",\"value_numeric\":5724000,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Total annual O&M Cost ... Fixed O&M + extended warranties\",\"ai_summary\":\"Annual fixed opex is calculated as 270 MW multiplied by the combined 21,200 AUD/MW-year fixed O&M plus extended warranty benchmark.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"No separate variable O&M assumed for BESS; set to 0 AUD/MWh.\",\"value_numeric\":0,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Variable O&M Cost ... - ... BESS long term service agreements not typically based on fixed / variable.\",\"ai_summary\":\"Aurecon does not provide a separate variable O&M value for BESS, explaining that service agreements are not typically structured on a fixed/variable split.\"},{\"field_name\":\"fuel_cost_or_contract_details\",\"value_text\":\"No fuel cost. AGL states the BESS can improve economics by time-shifting low-cost wind power; no specific charging contract found.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg\",\"source_title\":\"Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2024-04\",\"confidence\":\"medium\",\"raw_excerpt\":\"time shifting low-cost wind power\",\"ai_summary\":\"AGL describes the battery as supporting project economics by shifting wind output, but does not disclose a fuel or charging-energy contract.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Estimated 85% beginning-of-life round-trip efficiency for a 4-hour Li-ion BESS at the point of connection including auxiliaries.\",\"value_numeric\":85,\"unit\":\"%\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Round trip efficiency ... % ... 85 ... Typical round trip efficiency\",\"ai_summary\":\"Aurecon's 4-hour Li-ion BESS benchmark assumes 85% beginning-of-life round-trip efficiency at the point of connection including auxiliaries.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"Not applicable for battery storage because there is no thermal fuel conversion heat rate.\",\"value_numeric\":null,\"unit\":\"GJ/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"high\",\"raw_excerpt\":\"Technology Li-ion\",\"ai_summary\":\"Aurecon classifies the benchmark technology as Li-ion BESS, for which round-trip efficiency is applicable rather than thermal heat rate.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"Direct operating emissions assumed 0 tCO2/MWh for the battery itself; charging-energy emissions are excluded and dispatch-dependent.\",\"value_numeric\":0,\"unit\":\"tCO2/MWh\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/240424-barn-hill-wind-farm-and-battery-project-factsheetapril.pdf?srsltid=AfmBOoqmxuFCbfurZUkAGbgSPvSII5zF39WSb7_VscMpfnpnaSiby_Xg\",\"source_title\":\"Barn Hill Wind Farm and Battery Project Fact Sheet - April 2024\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2024-04\",\"confidence\":\"medium\",\"raw_excerpt\":\"Battery Energy Storage System (BESS)\",\"ai_summary\":\"Because Barn Hill BESS is an electrochemical storage system with no on-site combustion, direct emissions are assumed zero; indirect emissions depend on charging energy.\"},{\"field_name\":\"asset_life_years_bess_assumption\",\"value_text\":\"20-year economic/design life and 20-year technical/operational life for large-scale Li-ion BESS; possible extension to around 25 years after condition assessment.\",\"value_numeric\":20,\"unit\":\"years\",\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Economic Life ... Years 20 ... Technical Life ... Years 20\",\"ai_summary\":\"Aurecon's 4-hour Li-ion BESS benchmark assumes a 20-year life, with potential extension to about 25 years depending on condition assessment and later battery upgrades.\"},{\"field_name\":\"asset_life_years_project_statement\",\"value_text\":\"AGL states the broader Barn Hill Wind Farm and Battery Project has an asset life of about 35 years.\",\"value_numeric\":35,\"unit\":\"years\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Asset life About 35 years\",\"ai_summary\":\"AGL's project-level asset life is longer than the BESS technology default and appears to refer to the overall project, especially the wind farm and associated infrastructure.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"BESS life may be extended after condition assessment and later battery upgrades; AGL states project decommissioning and rehabilitation plan would govern end of life.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemo.com.au/-/media/files/major-publications/isp/2025/aurecon-2024-energy-technology-costs-and-technical-parameter-review.pdf?la=en\",\"source_title\":\"2024 Energy Technology Cost and Technical Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2024-12-06\",\"confidence\":\"medium\",\"raw_excerpt\":\"Life may potentially be extended to approx. 25 years\",\"ai_summary\":\"Aurecon notes BESS operational life can potentially be extended after condition assessment, with further life extension through battery upgrades.\"},{\"field_name\":\"major_refurbishment_or_closure_notes_project\",\"value_text\":\"At project end-of-life, AGL says decommissioning and dismantling would be undertaken under a detailed Decommissioning and Rehabilitation Plan.\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/how-we-source-energy/barn-hill/250710-agl-barnhill-july-2025-digital.pdf\",\"source_title\":\"Barn Hill Wind Farm and Battery Project - July 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-07\",\"confidence\":\"high\",\"raw_excerpt\":\"Decommissioning and Rehabilitation Plan\",\"ai_summary\":\"AGL provides a project-level end-of-life statement covering decommissioning, dismantling and rehabilitation planning.\"},{\"field_name\":\"owner_and_pipeline_context\",\"value_text\":\"AGL's FY25 annual report includes Barn Hill Wind Farm Pty Ltd as a 100% owned Australian body corporate and shows Barn Hill Wind Farm in the development pipeline.\",\"value_numeric\":100,\"unit\":\"%\",\"source_url\":\"https://www.agl.com.au/content/dam/digital/agl/documents/about-agl/company-docs/250813-2-agl-energy-limited-annual-report-2025.pdf\",\"source_title\":\"AGL Energy Limited Annual Report 2025\",\"publisher\":\"AGL Energy Limited\",\"published_date\":\"2025-08-13\",\"confidence\":\"high\",\"raw_excerpt\":\"Barn Hill Wind Farm Pty Ltd ... Australia 100\",\"ai_summary\":\"AGL's annual report supports AGL ownership/control context for the Barn Hill development entity and identifies Barn Hill in its development pipeline.\"}],\"warnings\":[\"No registered DUID was found for Barn Hill BESS; it appears to remain a publicly announced development rather than an in-service or committed NEM unit.\",\"No Barn Hill BESS-specific final investment decision, EPC contract, OEM selection, project finance, or construction capex announcement was found; capex and opex values are therefore estimates from AEMO/Aurecon technology benchmarks.\",\"AGL's 35-year asset life is project-level and likely driven by the broader wind farm/infrastructure scope; the financial profile uses a 20-year battery life benchmark for the BESS itself.\",\"Estimated capex is for a co-located 4-hour Li-ion BESS EPC benchmark scaled linearly to 270 MW / 1,080 MWh; it is not a reported Barn Hill battery construction budget and may exclude land/development, financing, owner’s costs, and battery augmentation beyond warranty assumptions.\",\"Variable O&M is represented as 0 AUD/MWh because the benchmark source reports no separate BESS variable O&M; this should be reviewed if an actual LTSA/O&M contract becomes available.\",\"Direct emissions intensity is set to zero for on-site battery operation only; lifecycle and charging-energy emissions are not included.\"]}"
}
],
"phase": "final_answer",
"role": "assistant"
}
],
"parallel_tool_calls": true,
"presence_penalty": 0,
"previous_response_id": null,
"prompt_cache_key": null,
"prompt_cache_retention": "24h",
"reasoning": {
"context": "current_turn",
"effort": "medium",
"summary": null
},
"safety_identifier": null,
"service_tier": "default",
"store": true,
"temperature": 1,
"text": {
"format": {
"type": "json_schema",
"description": null,
"name": "generator_financial_extraction",
"schema": {
"type": "object",
"additionalProperties": false,
"properties": {
"generator_identity": {
"type": "object",
"additionalProperties": false,
"properties": {
"site_name": {
"type": "string"
},
"duid": {
"type": [
"string",
"null"
]
},
"owner": {
"type": [
"string",
"null"
]
},
"region": {
"type": [
"string",
"null"
]
},
"technology_type": {
"type": [
"string",
"null"
]
},
"fuel_type": {
"type": [
"string",
"null"
]
}
},
"required": [
"site_name",
"duid",
"owner",
"region",
"technology_type",
"fuel_type"
]
},
"financial_profile": {
"type": "object",
"additionalProperties": false,
"properties": {
"generator_type_normalised": {
"type": "string",
"enum": [
"ocgt",
"ccgt",
"black_coal",
"brown_coal",
"diesel",
"wind_onshore",
"wind_offshore",
"solar_fixed",
"solar_tracking",
"battery",
"hydro",
"pumped_hydro",
"biomass",
"waste_gas",
"hybrid",
"other"
]
},
"capex_total_aud": {
"type": [
"number",
"null"
]
},
"capex_year": {
"type": [
"number",
"null"
]
},
"capex_basis": {
"type": "string",
"enum": [
"reported",
"estimated",
"default",
"unknown"
]
},
"capex_per_mw_aud": {
"type": [
"number",
"null"
]
},
"capex_per_mwh_aud": {
"type": [
"number",
"null"
]
},
"fixed_opex_annual_aud": {
"type": [
"number",
"null"
]
},
"fixed_opex_per_mw_year_aud": {
"type": [
"number",
"null"
]
},
"variable_opex_per_mwh_aud": {
"type": [
"number",
"null"
]
},
"fuel_cost_per_gj_aud": {
"type": [
"number",
"null"
]
},
"fuel_contract_notes": {
"type": [
"string",
"null"
]
},
"heat_rate_gj_per_mwh": {
"type": [
"number",
"null"
]
},
"efficiency_pct": {
"type": [
"number",
"null"
]
},
"emissions_intensity_tco2_mwh": {
"type": [
"number",
"null"
]
},
"asset_life_years": {
"type": [
"number",
"null"
]
},
"discount_rate_pct": {
"type": [
"number",
"null"
]
},
"source_confidence": {
"type": "string",
"enum": [
"high",
"medium",
"low",
"unknown"
]
},
"data_status": {
"type": "string",
"enum": [
"ai_estimated",
"partially_verified",
"needs_review"
]
},
"notes": {
"type": [
"string",
"null"
]
}
},
"required": [
"generator_type_normalised",
"capex_total_aud",
"capex_year",
"capex_basis",
"capex_per_mw_aud",
"capex_per_mwh_aud",
"fixed_opex_annual_aud",
"fixed_opex_per_mw_year_aud",
"variable_opex_per_mwh_aud",
"fuel_cost_per_gj_aud",
"fuel_contract_notes",
"heat_rate_gj_per_mwh",
"efficiency_pct",
"emissions_intensity_tco2_mwh",
"asset_life_years",
"discount_rate_pct",
"source_confidence",
"data_status",
"notes"
]
},
"sources": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": false,
"properties": {
"field_name": {
"type": "string"
},
"value_text": {
"type": [
"string",
"null"
]
},
"value_numeric": {
"type": [
"number",
"null"
]
},
"unit": {
"type": [
"string",
"null"
]
},
"source_url": {
"type": [
"string",
"null"
]
},
"source_title": {
"type": [
"string",
"null"
]
},
"publisher": {
"type": [
"string",
"null"
]
},
"published_date": {
"type": [
"string",
"null"
]
},
"confidence": {
"type": "string",
"enum": [
"high",
"medium",
"low"
]
},
"raw_excerpt": {
"type": [
"string",
"null"
]
},
"ai_summary": {
"type": [
"string",
"null"
]
}
},
"required": [
"field_name",
"value_text",
"value_numeric",
"unit",
"source_url",
"source_title",
"publisher",
"published_date",
"confidence",
"raw_excerpt",
"ai_summary"
]
}
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
}
},
"required": [
"generator_identity",
"financial_profile",
"sources",
"warnings"
]
},
"strict": true
},
"verbosity": "medium"
},
"tool_choice": "required",
"tools": [
{
"type": "web_search",
"return_token_budget": "default",
"search_context_size": "high",
"user_location": {
"type": "approximate",
"city": null,
"country": "AU",
"region": null,
"timezone": null
}
}
],
"top_logprobs": 0,
"top_p": 0.98,
"truncation": "disabled",
"usage": {
"input_tokens": 59796,
"input_tokens_details": {
"cached_tokens": 5120
},
"output_tokens": 7462,
"output_tokens_details": {
"reasoning_tokens": 2855
},
"total_tokens": 67258
},
"user": null,
"metadata": []
}
}