Calpine Corporation · Riverside County · CAISO
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.
Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.
Reported plant capacity and configuration.
Primary generation technology.
Nova Power, LLC · Riverside County · CAISO
Battery subsystem rating.
Menifee Power Bank is operating.
500 kV · Southern California Edison Company
Installed equipment documented in public project records.
Batteries
4-hour storage duration
Menifee Power Bank is operating.
500 kV · Southern California Edison Company
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| NOVA1 | 230 MW 230 MW summer | Batteries Electricity used for energy storage · BA | Jun 2024 | Operating |
| NOVA2 | 230 MW 230 MW summer | Batteries Electricity used for energy storage · BA | Jul 2024 | Operating |
| NOVA3 | 50 MW 50 MW summer | Batteries Electricity used for energy storage · BA | Aug 2024 | Operating |
| NOVA4 | 110 MW |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
Construction of the Nova Power Bank began in August 2023 under Mortenson's EPC scope.
CAISO
CAISO · Riverside County
Batteries Electricity used for energy storage · BA |
| Sep 2024 |
| Operating |
| NOVA5 | 60 MW 60 MW summer | Batteries Electricity used for energy storage · BA | Jul 2025 | Operating |
EIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator NOVA1 with this operating date.
EIA-860 lists generator NOVA2 with this operating date.
Mortenson reports that the complete 680 MW project was finished in June 2025.
EIA-860 lists generator NOVA5 with this operating date.
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.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Menifee Power Bank has a reported capacity of 680 MW. Source: EIA Form 860.
Menifee Power Bank is a batteries facility in Riverside County, CA, participating in the CAISO market.
Menifee Power Bank is in Riverside County, CA, inside the CAISO balancing area.
Menifee Power Bank is operated by Nova Power, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Menifee Power Bank reported 928.7 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.
Menifee Power Bank interconnects at SCE 500 kV Valley Substation, on the Southern California Edison Company system.
By capacity, Menifee Power Bank ranks #1 of 962 operating plants of the same technology nationally. It ranks #1 of 248 in CA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
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