# McCoy Solar Energy Project Hybrid

CAISO asset profile · https://askthegrid.com/assets/facilities/mccoy-solar-energy-project-hybrid

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.

## Profile

- **Battery:** The EIA record supports one generator record, MCST1, at 230 MW / 920 MWh. It does not support two physical installations or a container count.
- **Interconnection:** The project reaches SCE's 230 kV Colorado River Substation through the Black Creek substation and generation tie.

## Metrics

- **Plant nameplate:** 500.6 MW — EIA total: 270.6 MW solar plus 230 MW battery.
- **Solar nameplate:** 270.6 MW AC — Eight EIA solar-generator rows; 339.3 MW DC in the same registry.
- **Battery:** 230 MW / 920 MWh — Four-hour EIA generator MCST1.
- **Solar financing:** $579M — Solar-only facilities; not battery or whole-plant financing.

## Facts

- **Operator:** McCoy Solar, LLC
- **Developer:** NextEra Energy Resources
- **Solar EPC/modules:** First Solar CdTe

## Related parties

- **Developer / sponsor:** NextEra Energy Resources — Owner release and SEC filing ([source](https://newsroom.nexteraenergy.com/2016-11-10-Clean-energy-for-California-NextEra-Energy-Resources-celebrates-commissioning-of-Blythe-and-McCoy-Solar-Energy-Centers))

## Sources

- [McCoy project record](https://eplanning.blm.gov/Project-Home/?id=076aa393-a7f2-f011-8407-001dd80c29f3) — Bureau of Land Management · authoritative — Federal land, approval, and project-scope record.
- [EIA-860M](https://www.eia.gov/electricity/data/eia860m/) — U.S. EIA · authoritative — Current generator-level solar and storage nameplates and operating months.

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