# Mojave Solar Project

CAISO Solar Thermal without Energy Storage · https://askthegrid.com/assets/facilities/mojave-solar-project

Mojave Solar Project is a hybrid solar and battery storage facility with 280 MW of EIA-reported nameplate capacity in San Bernardino County, California, registered as EIA Plant ID 57331. Mojave Solar LLC owns and operates the plant. The plant's generating configuration is two independently operable parabolic-trough solar-thermal fields (Alpha and Beta), each feeding a 125-MW power island and heat-transfer fluid generates steam for a steam-turbine generator.

## Key facts

- Technology: Solar Thermal without Energy Storage
- Power capacity: 280 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CISO / CAISO

## Source-backed facts

- Owner logo domain: atlantica.com — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Owner logo domain: atlantica.com — Atlantica Sustainable Infrastructure · confidence: medium
- Identifiers: [{"value":"57331","system":"EIA plant code"},{"value":"MSP1","system":"EIA generator ID"},{"value":"19304","system":"EIA generator record ID"},{"value":"MSP2","system":"EIA generator ID"},{"value":"19305","system":"EIA generator record ID"},{"value":"CAISO","system":"ISO/RTO / balancing authority"},{"value":"Mojave Solar","system":"CAISO participating-resource name"},{"value":"09-AFC-05","system":"California Energy Commission docket"}] — MBR | Index · confidence: medium
- Identifiers: [{"value":"57331","system":"EIA plant code"},{"value":"MSP1","system":"EIA generator ID"},{"value":"19304","system":"EIA generator record ID"},{"value":"MSP2","system":"EIA generator ID"},{"value":"19305","system":"EIA generator record ID"},{"value":"CAISO","system":"ISO/RTO / balancing authority"},{"value":"Mojave Solar","system":"CAISO participating-resource name"},{"value":"09-AFC-05","system":"California Energy Commission docket"}] — Resource category and phase · confidence: medium
- Description: Mojave Solar Project is an operating concentrated solar power facility near Harper Dry Lake in San Bernardino County, California. It uses parabolic-trough solar thermal technology and is described by Atlantica as 250 MW net and 280 MW gross. The project began commercial operation on December 9, 2014. It was certified by the California Energy Commission under docket 09-AFC-05. — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Canonical name: Mojave Solar Project — MBR | Index · confidence: high
- Identifiers.0: {"value":"57331","system":"EIA plant code"} — MBR | Index · confidence: high
- Identifiers.1: {"value":"MSP1","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.2: {"value":"19304","system":"EIA generator record ID"} — MBR | Index · confidence: high
- Identifiers.3: {"value":"MSP2","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.4: {"value":"19305","system":"EIA generator record ID"} — MBR | Index · confidence: high
- Identifiers.6: {"value":"Mojave Solar","system":"CAISO participating-resource name"} — Resource category and phase · confidence: medium
- Parties.0: {"relationship":"Legal project owner","name":"Mojave Solar, LLC","official_url":null} — MBR | Index · confidence: high
- Parties.1: {"relationship":"Parent owner / asset owner","name":"Atlantica Sustainable Infrastructure","official_url":"https://atlantica.com/"} — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Parties.2: {"relationship":"Historical developer and constructor","name":"Abengoa Solar, Inc.","official_url":"https://www.abengoa.com/web/en/"} — Abengoa :: News · confidence: medium
- Parties.5: {"relationship":"Loan-guarantee provider","name":"U.S. Department of Energy","official_url":"https://www.energy.gov/"} — MOJAVE | Department of Energy · confidence: high
- Parties.7: {"relationship":"Balancing authority and market operator","name":"California Independent System Operator","official_url":"https://www.caiso.com/"} — Resource category and phase · confidence: medium
- Product url: https://www.abengoa.com/web/en/novedades/mojave/imagenes/ — DE-EE0006357 Improved Large Aperture Collector... · confidence: medium
- Product url: https://www.abengoa.com/web/en/novedades/mojave/imagenes/ — Abengoa :: News · confidence: medium
- Kind: solar — MOJAVE | Department of Energy · confidence: medium
- Product url: https://www.abengoa.com/web/en/novedades/mojave/imagenes/ — Abengoa :: Images · confidence: medium
- Description: Mojave Solar Project is a 250-MW-net, 280-MW-gross concentrated solar power facility in San Bernardino County, California, using parabolic-trough solar-thermal technology without energy storage. The facility has two independently operable solar fields, each feeding a 125-MW power island, and is legally owned by Mojave Solar LLC. Abengoa Solar developed and constructed the project, which was transferred to Abengoa Yield as part of the 2014 Abengoa Yield IPO and is now held upstream by Atlantica Sustainable Infrastructure. Construction began in September 2011, and the California Energy Commission records commercial operation beginning December 9, 2014. — Source · confidence: medium
- Description: Mojave Solar Project is a 250-MW-net, 280-MW-gross concentrated solar power facility in San Bernardino County, California, using parabolic-trough solar-thermal technology without energy storage. The facility has two independently operable solar fields, each feeding a 125-MW power island, and is legally owned by Mojave Solar LLC. Abengoa Solar developed and constructed the project, which was transferred to Abengoa Yield as part of the 2014 Abengoa Yield IPO and is now held upstream by Atlantica Sustainable Infrastructure. Construction began in September 2011, and the California Energy Commission records commercial operation beginning December 9, 2014. — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Description: Mojave Solar Project is a 250-MW-net, 280-MW-gross concentrated solar power facility in San Bernardino County, California, using parabolic-trough solar-thermal technology without energy storage. The facility has two independently operable solar fields, each feeding a 125-MW power island, and is legally owned by Mojave Solar LLC. Abengoa Solar developed and constructed the project, which was transferred to Abengoa Yield as part of the 2014 Abengoa Yield IPO and is now held upstream by Atlantica Sustainable Infrastructure. Construction began in September 2011, and the California Energy Commission records commercial operation beginning December 9, 2014. — Source · confidence: medium
- Description: Mojave Solar Project is a 250-MW-net, 280-MW-gross concentrated solar power facility in San Bernardino County, California, using parabolic-trough solar-thermal technology without energy storage. The facility has two independently operable solar fields, each feeding a 125-MW power island, and is legally owned by Mojave Solar LLC. Abengoa Solar developed and constructed the project, which was transferred to Abengoa Yield as part of the 2014 Abengoa Yield IPO and is now held upstream by Atlantica Sustainable Infrastructure. Construction began in September 2011, and the California Energy Commission records commercial operation beginning December 9, 2014. — Source · confidence: medium
- Quality notes: ["Capacity conventions differ by source: the CEC and DOE describe the facility as 250 MW nominal or net, while Atlantica and Abengoa report 280 MW gross.","Commercial-operation dates differ slightly by source: Abengoa announced a December 1, 2014 declaration of commercial operation, while the CEC records the project as beginning commercial operation on December 9, 2014.","The June 2014 transfer consideration of $779.8 million in cash plus a 64.28% interest in Abengoa Yield applied to the broader asset-transfer and IPO structure, not to a disclosed Mojave-specific sale price.","The August 2019 $6 million transaction concerned ASI Operations LLC, the O&M provider for Mojave and Solana, rather than a sale of the Mojave generating facility.","CEC post-certification records describe a 2022 hydrogen-generation-system modification and a 2024 request to share transmission and water facilities with the proposed Overnight Solar Project; these are ancillary changes, not documented Mojave capacity expansion, storage addition, or repowering. The cited official project record continues to list Mojave as operational and contains no retirement event."] — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Quality notes: ["Capacity conventions differ by source: the CEC and DOE describe the facility as 250 MW nominal or net, while Atlantica and Abengoa report 280 MW gross.","Commercial-operation dates differ slightly by source: Abengoa announced a December 1, 2014 declaration of commercial operation, while the CEC records the project as beginning commercial operation on December 9, 2014.","The June 2014 transfer consideration of $779.8 million in cash plus a 64.28% interest in Abengoa Yield applied to the broader asset-transfer and IPO structure, not to a disclosed Mojave-specific sale price.","The August 2019 $6 million transaction concerned ASI Operations LLC, the O&M provider for Mojave and Solana, rather than a sale of the Mojave generating facility.","CEC post-certification records describe a 2022 hydrogen-generation-system modification and a 2024 request to share transmission and water facilities with the proposed Overnight Solar Project; these are ancillary changes, not documented Mojave capacity expansion, storage addition, or repowering. The cited official project record continues to list Mojave as operational and contains no retirement event."] — Source · confidence: medium
- Quality notes: ["Capacity conventions differ by source: the CEC and DOE describe the facility as 250 MW nominal or net, while Atlantica and Abengoa report 280 MW gross.","Commercial-operation dates differ slightly by source: Abengoa announced a December 1, 2014 declaration of commercial operation, while the CEC records the project as beginning commercial operation on December 9, 2014.","The June 2014 transfer consideration of $779.8 million in cash plus a 64.28% interest in Abengoa Yield applied to the broader asset-transfer and IPO structure, not to a disclosed Mojave-specific sale price.","The August 2019 $6 million transaction concerned ASI Operations LLC, the O&M provider for Mojave and Solana, rather than a sale of the Mojave generating facility.","CEC post-certification records describe a 2022 hydrogen-generation-system modification and a 2024 request to share transmission and water facilities with the proposed Overnight Solar Project; these are ancillary changes, not documented Mojave capacity expansion, storage addition, or repowering. The cited official project record continues to list Mojave as operational and contains no retirement event."] — Source · confidence: medium
- Financing summary: In September 2011, the U.S. Department of Energy issued a $1.2 billion Title XVII loan guarantee to Mojave for construction and startup of the 250-MW-net parabolic-trough plant. Abengoa reported total project investment of approximately $1.6 billion. In June 2014, Abengoa transferred Mojave-related equity interests to Abengoa Yield as part of the broader IPO asset transfer; the reported aggregate consideration for that asset transfer was a 64.28% interest in Abengoa Yield plus $779.8 million in cash, not a Mojave-specific sale price. Separately, on March 9, 2018, Algonquin Power & Utilities acquired a 25% equity interest in Atlantica for approximately $608 million from ACIL Luxco 1, S.A., an Abengoa-related seller; this was a parent-company equity transaction rather than direct Mojave sale consideration. On August 2, 2019, Atlantica acquired ASI Operations LLC for $6 million; that transaction covered O&M services for Mojave and Solana, not the plant itself. — MOJAVE | Department of Energy · confidence: medium
- Financing summary: In September 2011, the U.S. Department of Energy issued a $1.2 billion Title XVII loan guarantee to Mojave for construction and startup of the 250-MW-net parabolic-trough plant. Abengoa reported total project investment of approximately $1.6 billion. In June 2014, Abengoa transferred Mojave-related equity interests to Abengoa Yield as part of the broader IPO asset transfer; the reported aggregate consideration for that asset transfer was a 64.28% interest in Abengoa Yield plus $779.8 million in cash, not a Mojave-specific sale price. Separately, on March 9, 2018, Algonquin Power & Utilities acquired a 25% equity interest in Atlantica for approximately $608 million from ACIL Luxco 1, S.A., an Abengoa-related seller; this was a parent-company equity transaction rather than direct Mojave sale consideration. On August 2, 2019, Atlantica acquired ASI Operations LLC for $6 million; that transaction covered O&M services for Mojave and Solana, not the plant itself. — Abengoa Closes $1.2 Billion Financing for the Mojave Solar Project and Starts Construction · confidence: medium
- Financing summary: In September 2011, the U.S. Department of Energy issued a $1.2 billion Title XVII loan guarantee to Mojave for construction and startup of the 250-MW-net parabolic-trough plant. Abengoa reported total project investment of approximately $1.6 billion. In June 2014, Abengoa transferred Mojave-related equity interests to Abengoa Yield as part of the broader IPO asset transfer; the reported aggregate consideration for that asset transfer was a 64.28% interest in Abengoa Yield plus $779.8 million in cash, not a Mojave-specific sale price. Separately, on March 9, 2018, Algonquin Power & Utilities acquired a 25% equity interest in Atlantica for approximately $608 million from ACIL Luxco 1, S.A., an Abengoa-related seller; this was a parent-company equity transaction rather than direct Mojave sale consideration. On August 2, 2019, Atlantica acquired ASI Operations LLC for $6 million; that transaction covered O&M services for Mojave and Solana, not the plant itself. — Source · confidence: medium
- Financing summary: In September 2011, the U.S. Department of Energy issued a $1.2 billion Title XVII loan guarantee to Mojave for construction and startup of the 250-MW-net parabolic-trough plant. Abengoa reported total project investment of approximately $1.6 billion. In June 2014, Abengoa transferred Mojave-related equity interests to Abengoa Yield as part of the broader IPO asset transfer; the reported aggregate consideration for that asset transfer was a 64.28% interest in Abengoa Yield plus $779.8 million in cash, not a Mojave-specific sale price. Separately, on March 9, 2018, Algonquin Power & Utilities acquired a 25% equity interest in Atlantica for approximately $608 million from ACIL Luxco 1, S.A., an Abengoa-related seller; this was a parent-company equity transaction rather than direct Mojave sale consideration. On August 2, 2019, Atlantica acquired ASI Operations LLC for $6 million; that transaction covered O&M services for Mojave and Solana, not the plant itself. — Untitled · confidence: medium
- Commercial parties.1: {"relationship":"Parent owner and asset owner","name":"Atlantica Sustainable Infrastructure","detail":"Current upstream owner of Mojave Solar LLC; Atlantica reports Mojave as a 250-MW-net, 280-MW-gross plant operating since 2014 and states that O&M is performed in-house.","official_url":"https://atlantica.com/"} — Atlantica - Powering the energy transition | Assets | Mojave · confidence: high
- Commercial parties.3: {"relationship":"Historical parent and seller in parent-level transactions","name":"Abengoa S.A.","detail":"Historical parent of the Abengoa development platform and related seller in the transfer and parent-company ownership transactions preceding Atlantica's current ownership structure.","official_url":"https://www.abengoa.com/web/en/"} — Source · confidence: medium
- Commercial parties.4: {"relationship":"Historical project acquirer","name":"Abengoa Yield plc","detail":"Acquired Mojave through the June 2014 asset-transfer and IPO structure from Abengoa-related entities; the company later became Atlantica Sustainable Infrastructure.","official_url":null} — Source · confidence: medium
- Commercial parties.5: {"relationship":"Loan-guarantee provider","name":"U.S. Department of Energy","detail":"Issued the $1.2 billion Title XVII loan guarantee in September 2011 to support construction and startup of Mojave.","official_url":"https://www.energy.gov/"} — MOJAVE | Department of Energy · confidence: high
- Commercial parties.10: {"relationship":"Historical O&M provider and acquired subsidiary","name":"ASI Operations LLC","detail":"Performed operation and maintenance services for the Mojave and Solana plants; Atlantica acquired the company on August 2, 2019 for $6 million.","official_url":null} — Source · confidence: medium
- Commercial parties.10: {"relationship":"Historical O&M provider and acquired subsidiary","name":"ASI Operations LLC","detail":"Performed operation and maintenance services for the Mojave and Solana plants; Atlantica acquired the company on August 2, 2019 for $6 million.","official_url":null} — Atlantica - Powering the energy transition | Assets | Mojave · confidence: medium
- Commercial parties.12: {"relationship":"Seller of Atlantica parent-company equity","name":"ACIL Luxco 1, S.A.","detail":"Abengoa-related seller under the agreement through which Algonquin acquired its 25% equity interest in Atlantica; this was not a direct sale of Mojave Solar LLC.","official_url":null} — Source · confidence: medium
- Acquirer: Abengoa Yield plc — Source · confidence: high
- Status date: 2026-08-02 — California Energy Commission : Docket Log · confidence: high

## Timeline

- 2010-09-08 — CEC certification
  The California Energy Commission certified the Mojave Solar Project under docket 09-AFC-05.
  Source: Mojave Solar Project | California Energy Commission (https://www.energy.ca.gov/powerplant/solar-thermal/mojave-solar-project)
- 2011-09-14 — Project financing closed
  Abengoa finalized a $1.2 billion DOE loan guarantee; construction had begun and the proceeds were designated for the Mojave project.
  Source: Abengoa Closes $1.2 Billion Financing for the Mojave Solar Project and Starts Construction (https://www.prnewswire.com/news-releases/abengoa-closes-12-billion-financing-for-the-mojave-solar-project-and-starts-construction-129798588.html)
- 2014-12-01 — Commercial operation declared by Abengoa Yield
  Abengoa Yield announced that the 280-MW-gross plant had declared commercial operation on December 1, 2014.
  Source: Abengoa :: News (https://www.abengoa.com/web/en/novedades/mojave/noticias/)
- 2014-12-09 — Commercial operation recorded by the CEC
  The CEC records the project as beginning commercial operation on December 9, 2014.
  Source: Mojave Solar Project | California Energy Commission (https://www.energy.ca.gov/powerplant/solar-thermal/mojave-solar-project)
- 2020-01-28 — Ancillary O&M modification
  The CEC approved construction of a new warehouse area to facilitate facility operation and maintenance.
  Source: Mojave Solar Project | California Energy Commission (https://www.energy.ca.gov/powerplant/solar-thermal/mojave-solar-project)
- 2024-12-20 — Shared-facilities petition
  Mojave Solar LLC petitioned the CEC to share existing and proposed transmission infrastructure and existing onsite wells with the adjacent proposed Overnight Solar Project, including a new gen-tie corridor. The petition describes limited interconnection and construction-water changes rather than Mojave generation expansion or repowering.
  Source: Mojave Solar Project (09-AFC-05C) Petition to Amend for OSP Shared Facilities (https://efiling.energy.ca.gov/GetDocument.aspx?tn=260764&DocumentContentId=97073)

## Sources

- [Atlantica - Powering the energy transition | Assets | Mojave](https://atlantica.com/business/assets/asset/mojave/) — atlantica.com · tier other
- [Atlantica Sustainable Infrastructure](https://atlantica.com/) — atlantica.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=387) — mbrweb.ferc.gov · tier regulatory
- [Resource category and phase](https://www.caiso.com/documents/resourcecategoryandphaseallparticipatingresourceids.xlsx) — caiso.com · tier other
- [Mojave Solar Project | California Energy Commission](https://www.energy.ca.gov/powerplant/solar-thermal/mojave-solar-project) — energy.ca.gov · tier regulatory
- [EA-1798: Abengoa Mojave Solar Project near Barstow, California | Department of Energy](https://www.energy.gov/nepa/ea-1798-abengoa-mojave-solar-project-near-barstow-california) — energy.gov · tier regulatory
- [Abengoa :: News](https://www.abengoa.com/web/en/novedades/mojave/noticias/) — abengoa.com · tier other
- [MOJAVE | Department of Energy](https://www.energy.gov/edf/mojave) — energy.gov · tier regulatory
- [Abengoa Closes $1.2 Billion Financing for the Mojave Solar Project and Starts Construction](https://www.prnewswire.com/news-releases/abengoa-closes-12-billion-financing-for-the-mojave-solar-project-and-starts-construction-129798588.html) — prnewswire.com · tier other
- [Source](https://energy.ca.gov/powerplant/solar-thermal/mojave-solar-project) — energy.ca.gov · tier regulatory
- [Source](https://energy.gov/edf/mojave) — energy.gov · tier regulatory
- [Atlantica - Powering the energy transition | Assets | Mojave](https://atlantica.com/business/assets/asset/mojave) — atlantica.com · tier other
- [Microsoft Word - 100225 Cover letter to AMS Revised second supplemental responses to Set 1A AQ and PH_fin.doc](https://efiling.energy.ca.gov/GetDocument.aspx?tn=55678&DocumentContentId=52447) — efiling.energy.ca.gov · tier regulatory
- [Source](https://www.energy.gov/sites/prod/files/2016/04/f30/Improved%20Large%20Aperture%20Collector%20Manufacturing%20-%20Abengoa%20Solar%206357.pdf) — energy.gov · tier regulatory
- [Abengoa :: Images](https://www.abengoa.com/web/en/novedades/mojave/imagenes/) — abengoa.com · tier other
- [E-4433 (Redacted Draft Alternate-Pres. Peevey) - deals with cost recovery for the long-term renewable power purchase agreement between PG&E and Mojave Solar, LLC.](https://docs.cpuc.ca.gov/PUBLISHED/COMMENT_RESOLUTION/145204.htm) — docs.cpuc.ca.gov · tier regulatory
- [Source](https://www.atlantica.com/wp-content/uploads/documents/20150415-Atlantica-Yield-2014-Annual-Report.pdf) — atlantica.com · tier other
- [Source](https://www.sec.gov/Archives/edgar/data/1161785/000104746915001061/a2223107z20-f.htm) — sec.gov · tier regulatory
- [Mojave Solar Project (09-AFC-05C) Petition to Amend for OSP Shared Facilities](https://efiling.energy.ca.gov/GetDocument.aspx?tn=260764&DocumentContentId=97073) — efiling.energy.ca.gov · tier regulatory
- [Source](https://www.sec.gov/Archives/edgar/data/1174169/000114036118018665/ex99_1.htm) — sec.gov · tier regulatory
- [Source](https://www.sec.gov/Archives/edgar/data/1601072/000114036120017254/R8.htm) — sec.gov · tier regulatory
- [California Energy Commission : Docket Log](https://efiling.energy.ca.gov/Lists/DocketLog.aspx?docketnumber=09-AFC-05C) — efiling.energy.ca.gov · tier regulatory
- [Source](https://efiling.energy.ca.gov/GetDocument.aspx?tn=262248&DocumentContentId=98758) — efiling.energy.ca.gov · tier regulatory

## Data quality

- Capacity conventions differ by source: the CEC and DOE describe the facility as 250 MW nominal or net, while Atlantica and Abengoa report 280 MW gross. The June 2014 transfer consideration of $779.8 million in cash plus a 64.28% interest in Abengoa Yield applied to the broader asset-transfer and IPO structure, not to a disclosed Mojave-specific sale price. The August 2019 $6 million transaction concerned ASI Operations LLC, the O&M provider for Mojave and Solana, rather than a sale of the Mojave generating facility. CEC post-certification records describe a 2022 hydrogen-generation-system modification and a 2024 request to share transmission and water facilities with the proposed Overnight Solar Project; these are ancillary changes, not documented Mojave capacity expansion, storage addition, or repowering. The cited official project record continues to list Mojave as operational and contains no retirement event.

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