# Atlas IX

CAISO Batteries · https://askthegrid.com/assets/facilities/atlas-ix

Atlas IX is a battery energy storage facility with 150 MW of EIA-reported operating capacity and 600 MWh of reported energy capacity in La Paz County, Arizona, registered as EIA Plant ID 68324. Atlas IX LLC is the registered plant entity or operator. Public project records list 1 battery units. Its grid role is standalone battery storage providing capacity and energy for California grid resilience, reliability, and stability under a 15-year Southern California Edison Resource Adequacy contract in the CAISO market.

## Key facts

- Technology: Batteries
- Power capacity: 150 MW
- Energy capacity: 600 MWh
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CISO (CAISO)
- Interconnection voltage: 500 kV

## Source-backed facts

- Description: Atlas IX is a 150 MW/600 MWh standalone battery energy storage project in La Paz County, Arizona. EIA records identify one operational battery generating unit, ALT9, with a nameplate capacity of 150 MW and a completion date of October 1, 2025; the listed operator is Atlas IX LLC. TransGrid Energy identifies Atlas IX as in operation and states that the project supports California customers through a 15-year Resource Adequacy contract with Southern California Edison in the CAISO market. — Our Projects - TransGrid Energy · confidence: medium
- Parties.2: {"relationship":"Parent company of TransGrid Energy","name":"Hanwha FutureProof","official_url":"https://www.hanwha.com/"} — TransGrid Energy · confidence: medium
- Parties.4: {"relationship":"Resource Adequacy contract counterparty / offtaker","name":"Southern California Edison","official_url":"https://www.sce.com/"} — Source · confidence: medium
- Parties.5: {"relationship":"Lead arranger and lender","name":"Société Générale","official_url":"https://www.societegenerale.com/"} — Source · confidence: medium
- Parties.6: {"relationship":"Lead arranger and lender","name":"Santander","official_url":"https://www.santander.com/"} — Source · confidence: medium
- Parties.7: {"relationship":"Lender","name":"BNP Paribas","official_url":"https://group.bnpparibas/"} — Source · confidence: medium
- Parties.8: {"relationship":"Lender","name":"Banco Bilbao Vizcaya Argentaria","official_url":"https://www.bbva.com/"} — Source · confidence: medium
- Parties.9: {"relationship":"Lender","name":"East West Bank","official_url":"https://www.eastwestbank.com/"} — Source · confidence: medium
- Parties.10: {"relationship":"Lender","name":"Shinhan Bank","official_url":"https://www.shinhan.com/"} — Source · confidence: medium
- Parties.11: {"relationship":"Lender","name":"Siemens Financial Services","official_url":"https://www.siemens.com/"} — Source · confidence: medium
- Parties.12: {"relationship":"Lender","name":"Associated Bank","official_url":"https://www.associatedbank.com/"} — Source · confidence: medium
- Construction scope: 150 MW / 600 MWh standalone BESS in La Paz County, Arizona, in operation; Qcells was the EPC contractor for construction. EIA records identify one operational battery generating unit, ALT9, rated at 150 MW. — Our Projects · confidence: high
- Kind: bess — Our Projects · confidence: high
- Description: Atlas IX is a standalone battery energy storage project in La Paz County, Arizona, with 150 MW of nameplate capacity and 600 MWh of storage. EIA records identify one operational battery generating unit, ALT9, and list Atlas IX LLC as the operator. TransGrid Energy identifies Atlas IX as part of its owned and operated project portfolio, with Hanwha FutureProof as its parent platform. Qcells served as EPC contractor, and the project entered operation on October 1, 2025. — Source · confidence: medium
- Timeline: [{"event":"Portfolio financing close","date":"2024-12","detail":"TransGrid completed more than $1.4 billion of financing for the combined Atlas VII and Atlas IX portfolio, including $705 million of debt, $270 million of tax equity, and up to $490 million of transferable investment tax credits."},{"event":"Construction","date":"2025-01-30","detail":"TransGrid announced that Atlas VII and Atlas IX were under construction by Qcells and intended to reach commercial operation later in 2025."},{"event":"Resource Adequacy contracting","date":"2024-03-21","detail":"A California Public Utilities Commission document described Atlas IX as a 150 MW project with a 15-year term; TransGrid later identified Southern California Edison as the Resource Adequacy counterparty for the projects."},{"event":"Commercial operation","date":"2025-10-01","detail":"The EIA record lists the ALT9 battery unit as operational with an actual completion date of October 1, 2025."},{"event":"Acquisition, sale, or predecessor ownership","date":null,"detail":"Public project records do not identify an acquisition, seller, predecessor owner, or transaction month and year for a sale of Atlas IX."},{"event":"Expansion, retirement, or repowering","date":null,"detail":"No expansion, retirement, repowering, or additional-unit event is identified for the exact Atlas IX plant."}] — 527800877.pdf · confidence: medium
- Timeline.2: {"event":"Resource Adequacy contracting","date":"2024-03-21","detail":"A California Public Utilities Commission document described Atlas IX as a 150 MW project with a 15-year term; TransGrid later identified Southern California Edison as the Resource Adequacy counterparty for the projects."} — 527800877.pdf · confidence: medium
- Timeline.5: {"event":"Expansion, retirement, or repowering","date":null,"detail":"No expansion, retirement, repowering, or additional-unit event is identified for the exact Atlas IX plant."} — Source · confidence: medium
- Quality notes.0: The EIA plant record lists Atlas IX LLC as the operator, while TransGrid Energy identifies itself as the owner and operator of the relevant utility-scale project portfolio. — Source · confidence: medium
- Quality notes.2: EIA identifies one operational generating unit, ALT9, rated at 150 MW; the project listing separately describes Atlas IX as a 150 MW/600 MWh BESS. — Source · confidence: high
- Commercial parties.2: {"relationship":"Parent company/platform","name":"Hanwha FutureProof","detail":"TransGrid Energy is identified as a wholly owned subsidiary of Hanwha FutureProof.","official_url":"https://www.hanwha.com/"} — Source · confidence: medium
- Commercial parties.2: {"relationship":"Parent company/platform","name":"Hanwha FutureProof","detail":"TransGrid Energy is identified as a wholly owned subsidiary of Hanwha FutureProof.","official_url":"https://www.hanwha.com/"} — Source · confidence: medium
- Commercial parties.5: {"relationship":"Lead arranger and lender","name":"Société Générale","detail":"Société Générale co-led the $705 million project-loan financing consortium.","official_url":"https://www.societegenerale.com/"} — Source · confidence: high
- Commercial parties.6: {"relationship":"Lead arranger and lender","name":"Santander","detail":"Santander co-led the $705 million project-loan financing consortium.","official_url":"https://www.santander.com/"} — Source · confidence: high
- Commercial parties.7: {"relationship":"Lender","name":"BNP Paribas","detail":"BNP Paribas participated in the bank consortium financing the Atlas VII and Atlas IX projects.","official_url":"https://group.bnpparibas/"} — Source · confidence: high
- Commercial parties.8: {"relationship":"Lender","name":"Banco Bilbao Vizcaya Argentaria","detail":"Banco Bilbao Vizcaya Argentaria participated in the bank consortium financing the projects.","official_url":"https://www.bbva.com/"} — Source · confidence: high
- Commercial parties.9: {"relationship":"Lender","name":"East West Bank","detail":"East West Bank participated in the bank consortium financing the projects.","official_url":"https://www.eastwestbank.com/"} — Source · confidence: high
- Commercial parties.10: {"relationship":"Lender","name":"Shinhan Bank","detail":"Shinhan Bank participated in the bank consortium financing the projects.","official_url":"https://www.shinhan.com/"} — Source · confidence: high
- Commercial parties.11: {"relationship":"Lender","name":"Siemens Financial Services","detail":"Siemens Financial Services participated in the bank consortium financing the projects.","official_url":"https://www.siemens.com/"} — Source · confidence: high
- Commercial parties.12: {"relationship":"Lender","name":"Associated Bank","detail":"Associated Bank participated in the bank consortium financing the projects.","official_url":"https://www.associatedbank.com/"} — Source · confidence: high

## Timeline

- 2024-12 — Portfolio financing close
  TransGrid completed more than $1.4 billion of financing for the combined Atlas VII and Atlas IX portfolio, including $705 million of debt, $270 million of tax equity, and up to $490 million of transferable investment tax credits.
  Source: Source (https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona)
- 2025-01-30 — Construction
  TransGrid announced that Atlas VII and Atlas IX were under construction by Qcells and intended to reach commercial operation later in 2025.
  Source: Source (https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona)

## Sources

- [Our Projects - TransGrid Energy](https://transgridenergy.com/our-projects/) — transgridenergy.com · tier other
- [Source](https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona/) — us.qcells.com · tier other
- [TransGrid Energy](https://transgridenergy.com/) — transgridenergy.com · tier other
- [Source](https://transgridenergy.com/our-projects) — transgridenergy.com · tier other
- [Source](https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona) — us.qcells.com · tier other
- [Source](https://us.qcells.com/epc/services/bess/) — us.qcells.com · tier other
- [Source](https://us.qcells.com/blog/lg-energy-solution-vertech-and-qcells-partner-to-deliver-5-gwh-of-u-s-energy-storage-projects/) — us.qcells.com · tier other
- [527800877.pdf](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M527/K800/527800877.pdf) — docs.cpuc.ca.gov · tier regulatory
- [Source](https://hanwha.com/newsroom/news/press-releases/hanwhas-transgrid-energy-secures-over-14-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona.do) — hanwha.com · tier other
- [TransGrid Energy secures $1.4 billion in financing](https://www.hanwha.com/newsroom/news/press-releases/hanwhas-transgrid-energy-secures-over-14-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona.do) — hanwha.com · tier other
- [NRI](https://www.caiso.com/documents/full-network-model-work-scope-db24m12.xlsx) — caiso.com · tier other
- [Source](https://www.caiso.com/documents/metering-exemption-listing-report-2026.pdf) — caiso.com · tier other

## Data quality

- The EIA plant record lists Atlas IX LLC as the operator, while TransGrid Energy identifies itself as the owner and operator of the relevant utility-scale project portfolio. The disclosed financing package covered the combined Atlas VII and Atlas IX portfolio; no Atlas IX-only financing allocation or sale consideration was disclosed. EIA identifies one operational generating unit, ALT9, rated at 150 MW; the project listing separately describes Atlas IX as a 150 MW/600 MWh BESS. Public project records do not identify an acquirer, seller, predecessor owner, expansion, retirement, or repowering event for Atlas IX.

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