# Menifee Power Bank

CAISO Batteries · https://askthegrid.com/assets/facilities/menifee-power-bank

Menifee Power Bank is a battery energy storage facility with 680 MW of EIA-reported operating capacity and 2,720 MWh of reported energy capacity in Riverside County, California, registered as EIA Plant ID 66494. Nova Power, LLC owns and operates the plant. Mortenson built the facility using BYD Cube Pro equipment; public project records list 1,200 battery containers.

## Key facts

- Technology: Batteries
- Power capacity: 680 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CAISO (CISO)
- Substation: SCE 500 kV Valley Substation
- Point of interconnection: SCE 500 kV Valley Substation
- Transmission owner: Southern California Edison Company
- Interconnection voltage: 500 kV

## Source-backed facts

- Owner logo domain: calpine.com — Calpine: America's Premier Competitive Power Company · confidence: medium
- Owner logo domain: calpine.com — Nova Battery Storage Projects - Calpine · confidence: medium
- Identifiers: [{"value":"66494","system":"EIA plant ID"},{"value":"NOVA1","system":"EIA generator ID"},{"value":"NOVA2","system":"EIA generator ID"},{"value":"NOVA3","system":"EIA generator ID"},{"value":"NOVA4","system":"EIA generator ID"},{"value":"NOVA5","system":"EIA generator ID"},{"value":"54752","system":"FERC MBR plant record ID"},{"value":"54753","system":"FERC MBR generator record ID"},{"value":"54754","system":"FERC MBR generator record ID"},{"value":"54755","system":"FERC MBR generator record ID"},{"value":"59515","system":"FERC MBR generator record ID"},{"value":"59516","system":"FERC MBR generator record ID"},{"value":"TOT934/Q1645","system":"CAISO interconnection project reference"},{"value":"SA278","system":"SCE interconnection agreement"},{"value":"ER24-2373-000","system":"FERC docket"},{"value":"TOT934-Q1625/SA278","system":"FERC/SCE LGIA filing reference"}] — MBR | Index · confidence: medium
- Identifiers: [{"value":"66494","system":"EIA plant ID"},{"value":"NOVA1","system":"EIA generator ID"},{"value":"NOVA2","system":"EIA generator ID"},{"value":"NOVA3","system":"EIA generator ID"},{"value":"NOVA4","system":"EIA generator ID"},{"value":"NOVA5","system":"EIA generator ID"},{"value":"54752","system":"FERC MBR plant record ID"},{"value":"54753","system":"FERC MBR generator record ID"},{"value":"54754","system":"FERC MBR generator record ID"},{"value":"54755","system":"FERC MBR generator record ID"},{"value":"59515","system":"FERC MBR generator record ID"},{"value":"59516","system":"FERC MBR generator record ID"},{"value":"TOT934/Q1645","system":"CAISO interconnection project reference"},{"value":"SA278","system":"SCE interconnection agreement"},{"value":"ER24-2373-000","system":"FERC docket"},{"value":"TOT934-Q1625/SA278","system":"FERC/SCE LGIA filing reference"}] — NRI · confidence: medium
- Identifiers: [{"value":"66494","system":"EIA plant ID"},{"value":"NOVA1","system":"EIA generator ID"},{"value":"NOVA2","system":"EIA generator ID"},{"value":"NOVA3","system":"EIA generator ID"},{"value":"NOVA4","system":"EIA generator ID"},{"value":"NOVA5","system":"EIA generator ID"},{"value":"54752","system":"FERC MBR plant record ID"},{"value":"54753","system":"FERC MBR generator record ID"},{"value":"54754","system":"FERC MBR generator record ID"},{"value":"54755","system":"FERC MBR generator record ID"},{"value":"59515","system":"FERC MBR generator record ID"},{"value":"59516","system":"FERC MBR generator record ID"},{"value":"TOT934/Q1645","system":"CAISO interconnection project reference"},{"value":"SA278","system":"SCE interconnection agreement"},{"value":"ER24-2373-000","system":"FERC docket"},{"value":"TOT934-Q1625/SA278","system":"FERC/SCE LGIA filing reference"}] — Federal Register, Volume 89 Issue 128 (Wednesday, July 3, 2024) · confidence: medium
- Official project url: https://www.calpine.com/battery-storage-projects/nova-battery-storage-projects/ — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: high
- Owner name: Nova Power, LLC — MBR | Index · confidence: high
- Description: Menifee Power Bank is a 680 MW / 2,720 MWh, four-hour lithium-ion battery energy storage facility in Menifee, Riverside County, California, built on the former Inland Empire Energy Center site. The facility is publicly presented by Calpine as the Nova Power Bank and is registered with EIA/FERC under Nova Power, LLC. Mortenson served as the EPC contractor, and the project was fully completed in June 2025. — Nova Battery Storage Projects - Calpine · confidence: medium
- Description: Menifee Power Bank is a 680 MW / 2,720 MWh, four-hour lithium-ion battery energy storage facility in Menifee, Riverside County, California, built on the former Inland Empire Energy Center site. The facility is publicly presented by Calpine as the Nova Power Bank and is registered with EIA/FERC under Nova Power, LLC. Mortenson served as the EPC contractor, and the project was fully completed in June 2025. — Plot Plan No. PLN 22-0154 and Conditional Use Permit No. PLN 22-0155 (“Nova Power Bank Project”) · confidence: medium
- Description: Menifee Power Bank is a 680 MW / 2,720 MWh, four-hour lithium-ion battery energy storage facility in Menifee, Riverside County, California, built on the former Inland Empire Energy Center site. The facility is publicly presented by Calpine as the Nova Power Bank and is registered with EIA/FERC under Nova Power, LLC. Mortenson served as the EPC contractor, and the project was fully completed in June 2025. — Nova Power Bank | Mortenson · confidence: medium
- Description: Menifee Power Bank is a 680 MW / 2,720 MWh, four-hour lithium-ion battery energy storage facility in Menifee, Riverside County, California, built on the former Inland Empire Energy Center site. The facility is publicly presented by Calpine as the Nova Power Bank and is registered with EIA/FERC under Nova Power, LLC. Mortenson served as the EPC contractor, and the project was fully completed in June 2025. — MBR | Index · confidence: medium
- Parties: [{"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null},{"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"},{"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"},{"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"},{"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"},{"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"},{"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"},{"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"}] — MBR | Index · confidence: medium
- Parties: [{"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null},{"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"},{"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"},{"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"},{"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"},{"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"},{"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"},{"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"}] — Nova Battery Storage Projects - Calpine · confidence: medium
- Parties: [{"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null},{"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"},{"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"},{"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"},{"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"},{"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"},{"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"},{"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"}] — Nova Power Bank | Mortenson · confidence: medium
- Parties: [{"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null},{"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"},{"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"},{"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"},{"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"},{"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"},{"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"},{"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"}] — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: medium
- Parties: [{"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null},{"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"},{"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"},{"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"},{"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"},{"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"},{"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"},{"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"}] — Plot Plan No. PLN 22-0154 and Conditional Use Permit No. PLN 22-0155 (“Nova Power Bank Project”) · confidence: medium
- Canonical name: Menifee Power Bank — MBR | Index · confidence: high
- Identifiers.0: {"value":"66494","system":"EIA plant ID"} — MBR | Index · confidence: high
- Identifiers.1: {"value":"NOVA1","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.2: {"value":"NOVA2","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.3: {"value":"NOVA3","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.6: {"value":"54752","system":"FERC MBR plant record ID"} — MBR | Index · confidence: high
- Identifiers.7: {"value":"54753","system":"FERC MBR generator record ID"} — MBR | Index · confidence: high
- Identifiers.8: {"value":"54754","system":"FERC MBR generator record ID"} — MBR | Index · confidence: high
- Identifiers.9: {"value":"54755","system":"FERC MBR generator record ID"} — MBR | Index · confidence: high
- Identifiers.12: {"value":"TOT934/Q1645","system":"CAISO interconnection project reference"} — NRI · confidence: high
- Identifiers.13: {"value":"SA278","system":"SCE interconnection agreement"} — Federal Register, Volume 89 Issue 128 (Wednesday, July 3, 2024) · confidence: high
- Identifiers.14: {"value":"ER24-2373-000","system":"FERC docket"} — Federal Register, Volume 89 Issue 128 (Wednesday, July 3, 2024) · confidence: high
- Identifiers.15: {"value":"TOT934-Q1625/SA278","system":"FERC/SCE LGIA filing reference"} — Federal Register, Volume 89 Issue 128 (Wednesday, July 3, 2024) · confidence: medium
- Parties.0: {"relationship":"Registered owner / generator utility","name":"Nova Power, LLC","official_url":null} — MBR | Index · confidence: high
- Parties.1: {"relationship":"Project developer / sponsor","name":"Calpine Corporation","official_url":"https://www.calpine.com/"} — Nova Battery Storage Projects - Calpine · confidence: medium
- Parties.2: {"relationship":"Engineering, procurement, and construction contractor","name":"Mortenson","official_url":"https://www.mortenson.com/"} — Nova Power Bank | Mortenson · confidence: high
- Parties.3: {"relationship":"Battery supplier / OEM","name":"BYD","official_url":"https://en.byd.com/"} — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: medium
- Parties.4: {"relationship":"Power-conversion equipment OEM","name":"Power Electronics","official_url":"https://www.power-electronics.com/"} — Nova Power Bank | Mortenson · confidence: medium
- Parties.5: {"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"} — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: high
- Parties.5: {"relationship":"Interconnecting transmission utility and storage user","name":"Southern California Edison Company","official_url":"https://www.sce.com/"} — Plot Plan No. PLN 22-0154 and Conditional Use Permit No. PLN 22-0155 (“Nova Power Bank Project”) · confidence: high
- Parties.6: {"relationship":"Storage user","name":"Peninsula Clean Energy","official_url":"https://www.peninsulacleanenergy.com/"} — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: medium
- Parties.7: {"relationship":"Storage user","name":"San Diego Gas & Electric","official_url":"https://www.sdge.com/"} — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: medium
- Parties.8: {"relationship":"Lead agency / permitting authority","name":"City of Menifee","official_url":"https://www.cityofmenifee.us/"} — Plot Plan No. PLN 22-0154 and Conditional Use Permit No. PLN 22-0155 (“Nova Power Bank Project”) · confidence: high
- Interconnection: Southern California Edison grid; CAISO reference TOT934/Q1645; three 500 kV substations, each with seven feeder breakers — Source · confidence: medium
- Unit configuration: Standalone lithium-ion battery energy storage facility using BYD Cube Pro and Power Electronics 4200M2 technology — Source · confidence: high
- Commercial operation date: 2025-06 — Source · confidence: medium
- Power mw: 680 — Source · confidence: high
- Energy mwh: 2720 — Source · confidence: high
- Product url: https://en.byd.com/news/byd-energy-provides-energy-storage-batteries-for-california-solar-plant/ — BYD energy provides energy storage batteries for California solar plant - Technological Innovations for a Better Life | BYD USA · confidence: medium
- Product url: https://en.byd.com/news/byd-energy-provides-energy-storage-batteries-for-california-solar-plant/ — PCSM & Multi PCSM | Power Electronics · confidence: medium
- Kind: bess — Nova Battery Storage Projects - Calpine · confidence: high
- Kind: bess — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: high
- Containers: 1200 — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: high
- Containers: 1200 — Nova Battery Storage Projects - Calpine · confidence: high
- Manufacturer domain: en.byd.com — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: medium
- Equipment models: [{"manufacturer_domain":"en.byd.com","product_url":"https://en.byd.com/news/byd-energy-provides-energy-storage-batteries-for-california-solar-plant/","count":null,"unit_mw":null,"name":"BYD Cube Pro"},{"manufacturer_domain":"power-electronics.com","product_url":"https://power-electronics.com/en/storage/pcsm-%26-multi-pcsm","count":null,"unit_mw":null,"name":"Power Electronics 4200M2"}] — Nova Power Bank | Mortenson · confidence: medium
- Product family: BYD Cube Pro — Nova Power Bank | Mortenson · confidence: medium
- Manufacturer name: BYD — BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA · confidence: high
- Equipment models.0: {"manufacturer_domain":"en.byd.com","product_url":"https://en.byd.com/news/byd-energy-provides-energy-storage-batteries-for-california-solar-plant/","count":null,"unit_mw":null,"name":"BYD Cube Pro"} — Nova Power Bank | Mortenson · confidence: medium
- Equipment models.1: {"manufacturer_domain":"power-electronics.com","product_url":"https://power-electronics.com/en/storage/pcsm-%26-multi-pcsm","count":null,"unit_mw":null,"name":"Power Electronics 4200M2"} — Nova Power Bank | Mortenson · confidence: medium
- Significance: Calpine presents Nova Power Bank as one of the largest standalone battery-storage facilities in the world: a 680 MW / 2,720 MWh, four-hour lithium-ion system capable of supporting approximately 680,000 homes. It also represents a major brownfield conversion, replacing the former Inland Empire Energy Center gas plant with grid-scale storage. — Nova Power Bank | Mortenson · confidence: medium

## Timeline

- 2023-08 — Battery project construction start
  Construction of the Nova Power Bank began in August 2023 under Mortenson's EPC scope.
  Source: Nova Power Bank | Mortenson (https://www.mortenson.com/projects/nova-power-bank)
- 2025-06 — Full project completion
  Mortenson reports that the complete 680 MW project was finished in June 2025.
  Source: Nova Power Bank | Mortenson (https://www.mortenson.com/projects/nova-power-bank)
- 2026-01 — Calpine parent-company acquisition
  Constellation completed its acquisition of Calpine in January 2026 and assumed the Nova Power credit agreement; this was a parent-company transaction rather than a separately reported sale of the Menifee asset.
  Source: Source (https://www.sec.gov/Archives/edgar/data/1868275/000186827526000067/R25.htm)

## Sources

- [Calpine: America's Premier Competitive Power Company](https://www.calpine.com/) — calpine.com · tier other
- [Nova Battery Storage Projects - Calpine](https://www.calpine.com/battery-storage-projects/nova-battery-storage-projects/) — calpine.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=766) — mbrweb.ferc.gov · tier regulatory
- [NRI](https://www.caiso.com/documents/fullnetworkmodel-workscope-db23m11.xlsx) — caiso.com · tier other
- [Federal Register, Volume 89 Issue 128 (Wednesday, July 3, 2024)](https://www.govinfo.gov/content/pkg/FR-2024-07-03/html/2024-14588.htm) — govinfo.gov · tier regulatory
- [BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA](https://www.calpine.com/wp-content/uploads/2024/08/Nova-Fact-Sheet-08.15.24.pdf) — calpine.com · tier other
- [Plot Plan No. PLN 22-0154 and Conditional Use Permit No. PLN 22-0155 (“Nova Power Bank Project”)](https://ceqanet.lci.ca.gov/2023040028) — ceqanet.lci.ca.gov · tier regulatory
- [Nova Power Bank | Mortenson](https://www.mortenson.com/projects/nova-power-bank) — mortenson.com · tier other
- [Source](https://mortenson.com/projects/nova-power-bank) — mortenson.com · tier other
- [BATTERY ENERGY STORAGE AT CALPINE: ENHANCING GRID RELIABILITY ACROSS CALIFORNIA](https://calpine.com/wp-content/uploads/2024/08/Nova-Fact-Sheet-08.15.24.pdf) — calpine.com · tier other
- [Nova Battery Storage Projects - Calpine](https://www.calpine.com/battery-storage-projects/nova-battery-storage-projects) — calpine.com · tier other
- [BYD energy provides energy storage batteries for California solar plant - Technological Innovations for a Better Life | BYD USA](https://en.byd.com/news/byd-energy-provides-energy-storage-batteries-for-california-solar-plant/) — en.byd.com · tier other
- [PCSM & Multi PCSM | Power Electronics](https://power-electronics.com/en/storage/pcsm-%26-multi-pcsm) — power-electronics.com · tier other
- [The Inland Empire CCGT Power Station Project, California, US](https://www.power-technology.com/projects/inland/) — power-technology.com · tier other
- [From Natural Gas-fired Power to Clean Power, Menifee Battery Storage Facility Comes Online This Summer - The Local Government Sustainable Energy Coalition](https://www.lgsec.org/from-natural-gas-fired-power-to-clean-power-menifee-battery-storage-facility-comes-online-this-summer/) — lgsec.org · tier other
- [R E S O L U T I O N](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M516/K187/516187216.pdf) — docs.cpuc.ca.gov · tier regulatory
- [Annual Report for the year ended December 31, 2024](https://www.sec.gov/Archives/edgar/data/1868275/000110465925119690/tm2532248d2_ex99-1.htm) — sec.gov · tier regulatory
- [Source](https://www.sec.gov/Archives/edgar/data/1868275/000186827526000067/R25.htm) — sec.gov · tier regulatory
- [Source](https://d3n9y02raazwpg.cloudfront.net/peninsulacleanenergy/78e55446-82a0-11ef-ab4b-005056a89546-75f73342-5a44-4497-acfc-7f7b54ce15dd-1728081163.pdf) — d3n9y02raazwpg.cloudfront.net · tier other
- [Source](https://www.wecc.org/sites/default/files/documents/progress_report/2024/SCE%202024%20APR.pdf) — wecc.org · tier other
- [Table of Operating Power Plants and Projects Under Construction as of: June 30, 2025](https://www.calpine.com/wp-content/uploads/2025/08/CPN_Portfolio_Q2-2025.pdf) — calpine.com · tier other

## Data quality

- The EIA/FERC identity crosswalk is consistent: EIA plant 66494 is listed as Menifee Power Bank under Nova Power, LLC, while Calpine publicly uses the Nova Power Bank name. The project was delivered in five phases. No separate post-completion expansion or repowering beyond the five-phase battery build is identified in the cited project sources.

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Canonical page: https://askthegrid.com/assets/facilities/menifee-power-bank

Source: Ask the Grid — https://askthegrid.com/