# Condor Energy Storage LLC

CAISO Batteries · https://askthegrid.com/assets/facilities/condor-energy-storage-llc

Condor Energy Storage LLC is a battery energy storage facility with 200 MW of EIA-reported operating capacity and 800 MWh of reported energy capacity in San Bernardino County, California, registered as EIA Plant ID 66285. Arevon Energy, Inc. is the public owner or developer; Condor Energy Storage LLC is the registered plant entity or operator. Rosendin Electric, Inc. built the facility using Tesla Megapack 2 XL equipment; public project records list 220 battery units. Commercial operation began in May 2024. Its grid role is four-hour battery storage that charges during periods of abundant renewable generation and discharges during peak demand to provide local grid reliability and additional capacity.

## Key facts

- Technology: Batteries
- Power capacity: 200 MW
- Energy capacity: 800 MWh
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CISO (CAISO)
- Substation: SCE Highgrove Substation
- Point of interconnection: SCE Highgrove Substation
- Transmission owner: Southern California Edison (SCE)
- Interconnection voltage: 115 kV

## Source-backed facts

- Owner logo domain: arevonenergy.com — Arevon: Leading Renewable Energy Developer · confidence: high
- Identifiers: [{"value":"66285","system":"EIA Plant ID"},{"value":"COND1","system":"EIA Generator ID"},{"value":"CISO","system":"EIA Balancing Authority"},{"value":"CAISO","system":"ISO/RTO and power market"},{"value":"CUP 20-03","system":"Grand Terrace land-use approval"},{"value":"V 21-01","system":"Grand Terrace variance approval"},{"value":"E 20-09","system":"Grand Terrace environmental review"},{"value":"SA 20-09","system":"Grand Terrace site and architectural review"}] — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Official project url: https://condorenergystorage.com/ — Condor Energy Storage · confidence: high
- Owner name: Arevon Energy, Inc. — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: medium
- Description: Condor Energy Storage LLC is an operational 200 MW battery power plant in San Bernardino County, California, with one generating unit identified as COND1. The plant became operational on May 1, 2024, and is associated with the 200 MW/800 MWh Condor Energy Storage Project in Grand Terrace. The project interconnects at Southern California Edison’s Highgrove Substation and participates in the CAISO market. Arevon Energy, Inc. owns and operates the project; Tesla supplies the Megapack 2 XL system and operations and maintenance, while Rosendin Electric served as the EPC contractor. — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Identifiers.4: {"value":"CUP 20-03","system":"Grand Terrace land-use approval"} — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Identifiers.5: {"value":"V 21-01","system":"Grand Terrace variance approval"} — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Identifiers.6: {"value":"E 20-09","system":"Grand Terrace environmental review"} — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Identifiers.7: {"value":"SA 20-09","system":"Grand Terrace site and architectural review"} — Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc · confidence: medium
- Parties.1: {"relationship":"Owner and long-term operator","name":"Arevon Energy, Inc.","official_url":"https://arevonenergy.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: medium
- Parties.2: {"relationship":"Development collaborator","name":"Tenaska","official_url":"https://www.tenaska.com/"} — Condor Energy Storage - Tenaska Renewables · confidence: medium
- Parties.3: {"relationship":"Battery energy-storage-system OEM and O&M provider","name":"Tesla","official_url":"https://www.tesla.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Parties.4: {"relationship":"Engineering, procurement, and construction contractor","name":"Rosendin Electric, Inc.","official_url":"https://www.rosendin.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Parties.5: {"relationship":"Capacity purchaser and offtaker","name":"Southern California Edison","official_url":"https://www.sce.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Unit configuration: One battery generating unit (COND1), 200 MW nameplate, using Tesla Megapack 2 XL technology — Source · confidence: high
- Construction scope: A 200 MW/800 MWh battery energy-storage system on a 10-acre site, comprising 220 Tesla Megapack 2 XL units. The project scope includes battery storage containers with battery racks, control units, fire-prevention and fire-protection equipment, voltage transformers, inverters, and a small on-site substation. The site also includes space for 660 CMA Augmented BESS units for future capacity maintenance; those units are not identified as installed equipment. — About the Project – Condor Energy Storage · confidence: medium
- Product url: https://www.tesla.com/megapack — Megapack | Tesla · confidence: high
- Description: Condor Energy Storage LLC is an operational 200 MW battery plant in San Bernardino County, California, with one EIA generating unit, COND1, and an associated 800 MWh project configuration. Arevon Energy, Inc. is the long-term owner and operator; Tenaska originally developed the project in collaboration with Arevon. The facility uses Tesla Megapack 2 XL systems, interconnects with Southern California Edison’s Highgrove Substation, and sells its capacity to SCE under a long-term agreement. The site formerly contained the Highgrove Steam Plant, and the project progressed from 2023 groundbreaking to EIA-recorded operation on May 1, 2024, followed by a completion and operations ceremony on July 31, 2024. — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: medium
- Description: Condor Energy Storage LLC is an operational 200 MW battery plant in San Bernardino County, California, with one EIA generating unit, COND1, and an associated 800 MWh project configuration. Arevon Energy, Inc. is the long-term owner and operator; Tenaska originally developed the project in collaboration with Arevon. The facility uses Tesla Megapack 2 XL systems, interconnects with Southern California Edison’s Highgrove Substation, and sells its capacity to SCE under a long-term agreement. The site formerly contained the Highgrove Steam Plant, and the project progressed from 2023 groundbreaking to EIA-recorded operation on May 1, 2024, followed by a completion and operations ceremony on July 31, 2024. — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: medium
- Description: Condor Energy Storage LLC is an operational 200 MW battery plant in San Bernardino County, California, with one EIA generating unit, COND1, and an associated 800 MWh project configuration. Arevon Energy, Inc. is the long-term owner and operator; Tenaska originally developed the project in collaboration with Arevon. The facility uses Tesla Megapack 2 XL systems, interconnects with Southern California Edison’s Highgrove Substation, and sells its capacity to SCE under a long-term agreement. The site formerly contained the Highgrove Steam Plant, and the project progressed from 2023 groundbreaking to EIA-recorded operation on May 1, 2024, followed by a completion and operations ceremony on July 31, 2024. — Project History – Condor Energy Storage · confidence: medium
- Commercial parties.1: {"relationship":"Long-term owner and operator","name":"Arevon Energy, Inc.","detail":"Arevon led development, announced construction and operations, and stated that it would own and operate Condor on a long-term basis.","official_url":"https://arevonenergy.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Commercial parties.1: {"relationship":"Long-term owner and operator","name":"Arevon Energy, Inc.","detail":"Arevon led development, announced construction and operations, and stated that it would own and operate Condor on a long-term basis.","official_url":"https://arevonenergy.com/"} — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: high
- Commercial parties.2: {"relationship":"Development collaborator","name":"Tenaska","detail":"Tenaska was identified as the original developer working in collaboration with Arevon; Tenaska personnel were quoted in the project’s development and construction announcements.","official_url":"https://www.tenaska.com/"} — New Utility-Scale Battery Storage Facility Planned for City of Grand Terrace | Arevon · confidence: medium
- Commercial parties.3: {"relationship":"Original CEQA project applicant","name":"Upstream Energy Systems","detail":"The December 2021 CEQA notice names Upstream Energy Systems as the project applicant. The available records do not establish that it was the owner or a seller in a later transaction.","official_url":null} — I · confidence: high
- Commercial parties.5: {"relationship":"Battery-energy-storage-system OEM and O&M provider","name":"Tesla","detail":"Tesla supplied the Megapack 2 XL utility-scale battery system and was contracted to provide operations and maintenance services.","official_url":"https://www.tesla.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Commercial parties.5: {"relationship":"Battery-energy-storage-system OEM and O&M provider","name":"Tesla","detail":"Tesla supplied the Megapack 2 XL utility-scale battery system and was contracted to provide operations and maintenance services.","official_url":"https://www.tesla.com/"} — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: high
- Commercial parties.6: {"relationship":"Engineering, procurement, and construction contractor","name":"Rosendin Electric, Inc.","detail":"Rosendin served as the project’s EPC provider and built the facility with local labor organizations.","official_url":"https://www.rosendin.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Commercial parties.6: {"relationship":"Engineering, procurement, and construction contractor","name":"Rosendin Electric, Inc.","detail":"Rosendin served as the project’s EPC provider and built the facility with local labor organizations.","official_url":"https://www.rosendin.com/"} — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: high
- Commercial parties.7: {"relationship":"Capacity purchaser and offtaker","name":"Southern California Edison","detail":"SCE purchased Condor’s capacity under a long-term, 15-year agreement and owns the adjacent Highgrove Substation to which the project interconnects.","official_url":"https://www.sce.com/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Commercial parties.7: {"relationship":"Capacity purchaser and offtaker","name":"Southern California Edison","detail":"SCE purchased Condor’s capacity under a long-term, 15-year agreement and owns the adjacent Highgrove Substation to which the project interconnects.","official_url":"https://www.sce.com/"} — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: high
- Commercial parties.8: {"relationship":"Preferred-equity financing partner","name":"Blackstone Credit & Insurance","detail":"Blackstone Credit & Insurance provided the preferred-equity component of the February 2024 project financing.","official_url":"https://www.blackstone.com/our-businesses/credit-and-insurance-bxci/"} — Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon · confidence: high
- Timeline.0: {"event":"Interconnection study application","date":"2019-04","detail":"The project team submitted an application to Southern California Edison to begin interconnection studies at the adjacent Highgrove Substation."} — Project History – Condor Energy Storage · confidence: high
- Timeline.2: {"event":"Project development announcement","date":"2021-10-14","detail":"Arevon announced that Tenaska was developing the 200 MW/800 MWh Condor project in collaboration with Arevon, using Tesla Megapack technology."} — New Utility-Scale Battery Storage Facility Planned for City... · confidence: high
- Timeline.3: {"event":"City and CEQA approval","date":"2021-12-02","detail":"The City of Grand Terrace approved the 200 MW battery-energy-storage facility and adopted a mitigated negative declaration; the project included interconnection equipment for the adjacent SCE Highgrove Substation."} — I · confidence: high
- Timeline.4: {"event":"Groundbreaking","date":"2023-02-22","detail":"Arevon broke ground on the Condor Energy Storage Project. Construction was expected to span approximately one year."} — Condor Energy Storage Project Breaks Ground in City of Grand Terrace | Arevon · confidence: high
- Timeline.5: {"event":"Site grading","date":"2023-07","detail":"The project received its City of Grand Terrace grading permit and site grading commenced."} — Project History – Condor Energy Storage · confidence: medium
- Timeline.8: {"event":"Completion and operations ceremony","date":"2024-07-31","detail":"Arevon hosted a ribbon-cutting ceremony marking completion and the start of operations of the 200 MW/800 MWh project."} — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: high
- Quality notes.2: No expansion, retirement, or repowering milestone was identified for this exact EIA plant. The EIA record shows one operational unit and zero planned units. — Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon · confidence: medium

## Timeline

- 2019-04 — Interconnection study application
  The project team submitted an application to Southern California Edison to begin interconnection studies at the adjacent Highgrove Substation.
  Source: Project History – Condor Energy Storage (https://condorenergystorage.com/project-history/)
- 2021-12-02 — City and CEQA approval
  The City of Grand Terrace approved the 200 MW battery-energy-storage facility and adopted a mitigated negative declaration; the project included interconnection equipment for the adjacent SCE Highgrove Substation.
  Source: Project History – Condor Energy Storage (https://condorenergystorage.com/project-history/)
- 2023-02-22 — Groundbreaking
  Arevon broke ground on the Condor Energy Storage Project. Construction was expected to span approximately one year.
  Source: Condor Energy Storage Project Breaks Ground in City of Grand Terrace | Arevon (https://arevonenergy.com/news/releases/condor-energy-storage-project-breaks-ground-in-city-of-grand-terrace/)
- 2023-07 — Site grading
  The project received its City of Grand Terrace grading permit and site grading commenced.
  Source: Project History – Condor Energy Storage (https://condorenergystorage.com/project-history/)
- 2024-02-13 — Financial close
  Arevon and Blackstone Credit & Insurance announced the $350 million preferred-equity, debt, and ITC-transfer financing package, including the $164 million debt facility and named arranging banks.
  Source: Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon (https://arevonenergy.com/news/releases/arevon-and-blackstone-credit-insurance-close-350-million-preferred-equity-debt-and-itc-transfer-financing-for-condor-energy-storage-project/)
- 2024-07-31 — Completion and operations ceremony
  Arevon hosted a ribbon-cutting ceremony marking completion and the start of operations of the 200 MW/800 MWh project.
  Source: Arevon Celebrates the Start of Operations at its Condor Energy Storage Project | Arevon (https://arevonenergy.com/news/releases/arevon-celebrates-the-start-of-operations-at-its-condor-energy-storage-project-in-california/)

## Sources

- [Arevon: Leading Renewable Energy Developer](https://arevonenergy.com/) — arevonenergy.com · tier other
- [Microsoft Word - 20211011_13631.02_Condor BESS Facility_Public Review ISMND with Exhibits.doc](https://cdnsm5-hosted.civiclive.com/UserFiles/Servers/Server_12337255/File/Departments/Planning%20%26%20Development/Planning/CONDOR%20BESS/20211011_13631.02_Condor%20BESS%20Facility_Public%20Review%20ISMND%20with%20Exhibits_10.12.2021.pdf) — cdnsm5-hosted.civiclive.com · tier other
- [Condor Energy Storage](https://condorenergystorage.com/) — condorenergystorage.com · tier other
- [Arevon and Blackstone Credit & Insurance Close $350 Million for Condor | Arevon](https://arevonenergy.com/news/releases/arevon-and-blackstone-credit-insurance-close-350-million-preferred-equity-debt-and-itc-transfer-financing-for-condor-energy-storage-project/) — arevonenergy.com · tier other
- [Condor Energy Storage - Tenaska Renewables](https://renewables.tenaska.com/case_study/condor-energy-storage/) — renewables.tenaska.com · tier other
- [Source](https://renewables.tenaska.com/case_study/condor-energy-storage) — renewables.tenaska.com · tier other
- [Source](https://arevonenergy.com/news/releases/arevon-and-blackstone-credit-insurance-close-350-million-preferred-equity-debt-and-itc-transfer-financing-for-condor-energy-storage-project) — arevonenergy.com · tier other
- [Award of Merit, Energy/Industrial, Excellence in Safety](https://www.enr.com/articles/61726-award-of-merit-energy-industrial-excellence-in-safety-condor-bess) — enr.com · tier other
- [About the Project – Condor Energy Storage](https://condorenergystorage.com/about-the-project/) — condorenergystorage.com · tier other
- [Megapack | Tesla](https://www.tesla.com/megapack) — tesla.com · tier other
- [Arevon Celebrates the Start of Operations at its Condor ...](https://arevonenergy.com/news/releases/arevon-celebrates-the-start-of-operations-at-its-condor-energy-storage-project-in-california/) — arevonenergy.com · tier other
- [Project History – Condor Energy Storage](https://condorenergystorage.com/project-history/) — condorenergystorage.com · tier other
- [New Utility-Scale Battery Storage Facility Planned for City ...](https://arevonenergy.com/news/releases/new-utility-scale-battery-storage-facility-planned-for-city-of-grand-terrace/) — arevonenergy.com · tier other
- [I](https://files.ceqanet.lci.ca.gov/273469-2/attachment/c8-2JMniLa4kDWMC0dhoUmNi6WAn6l9f9T6cs3BJt3Ajwt-itAPdFmEJ-S5N1iRzEYclQmtdKohvVy6K0) — files.ceqanet.lci.ca.gov · tier regulatory
- [Condor Energy Storage Project Breaks Ground in City of Grand Terrace | Arevon](https://arevonenergy.com/news/releases/condor-energy-storage-project-breaks-ground-in-city-of-grand-terrace/) — arevonenergy.com · tier other
- [About the Project – Condor Energy Storage](https://condorenergystorage.com/about-the-project) — condorenergystorage.com · tier other

## Data quality

- The EIA record identifies one 200 MW battery generating unit, COND1, with no planned units. The May 1, 2024 EIA date is the first-unit operational date, while Arevon’s July 31, 2024 announcement marks the project completion and ceremonial start of operations. The public project history records execution of a purchase-and-sale agreement for the project-location real estate on September 28, 2020, but does not name the buyer or seller or disclose consideration. the gathered records do not establish a completed project-level acquisition by Arevon or identify a seller. No expansion, retirement, or repowering milestone was identified for this exact EIA plant. The EIA record shows one operational unit and zero planned units.

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