Solar generation and a four-hour battery at the Colorado River interconnection
McCoy is a Riverside County solar-and-storage plant operated by McCoy Solar, LLC. EIA's June 2026 inventory records 270.6 MW of solar nameplate and one 230 MW / 920 MWh battery generator; NextEra's separate contract basis describes a 250 MW AC solar project.
Answers use this researched asset profile with live CAISO data. Ask about ownership, equipment, project history, or current grid context.
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EIA total: 270.6 MW solar plus 230 MW battery.
Eight EIA solar-generator rows; 339.3 MW DC in the same registry.
Four-hour EIA generator MCST1.
Solar-only facilities; not battery or whole-plant financing.
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 41.9 MW 41.9 MW summer | Solar Photovoltaic Solar · PV | Mar 2016 | Operating |
| BLK2 | 21 MW 21 MW summer | Solar Photovoltaic Solar · PV | Apr 2016 | Operating |
| BLK3 | 39.6 MW 39.6 MW summer | Solar Photovoltaic Solar · PV | Jun 2016 | Operating |
| BLK4 | 31.4 MW 31.4 MW summer |
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.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Project milestones and public references behind the asset profile.
| Sep 2015 |
| Operating |
| BLK5 | 31.4 MW 31.4 MW summer | Solar Photovoltaic Solar · PV | Nov 2015 | Operating |
| BLK6 | 26.9 MW 26.9 MW summer | Solar Photovoltaic Solar · PV | Dec 2015 | Operating |
| BLK7 | 41.9 MW 41.9 MW summer | Solar Photovoltaic Solar · PV | Jan 2016 | Operating |
| BLK8 | 36.5 MW 36.5 MW summer | Solar Photovoltaic Solar · PV | Aug 2015 | Operating |
| MCST1 | 230 MW 230 MW summer | Batteries Electricity used for energy storage · BA | Jul 2021 | Operating |
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator BLK8 with this operating date.
EIA-860 lists generator BLK4 with this operating date.
EIA-860 lists generator BLK5 with this operating date.
EIA-860 lists generator BLK6 with this operating date.
EIA-860 lists generator BLK7 with this operating date.
EIA-860 lists generator 1 with this operating date.
EIA-860 lists generator BLK2 with this operating date.
EIA-860 lists generator BLK3 with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
McCoy Solar Energy Project Hybrid has a reported capacity of 500.6 MW and an energy capacity of 920 MWh battery. Source: EIA Form 860M.
McCoy Solar Energy Project Hybrid is a Solar photovoltaic generation plus battery storage facility in Riverside County, CA, participating in the CAISO market.
McCoy Solar Energy Project Hybrid is in Riverside County, CA, inside the CAISO balancing area.
McCoy Solar Energy Project Hybrid is operated by McCoy Solar, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
McCoy Solar Energy Project Hybrid reported 646.7 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
McCoy Solar Energy Project Hybrid interconnects at Colorado River Substation.
By capacity, McCoy Solar Energy Project Hybrid ranks #62 of 7,234 operating plants of the same technology nationally. It ranks #12 of 939 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.