Diamond Valley Solar Project
Riverside County, California · EIA plant ID 59405 · Operator: Ecos Energy LLC
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor21%solar units, summer MW
Heat rate—thermal plants only
First online2015
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2015 | 2.3 | 20.1% | — |
| 2016 | 2.5 | 21.8% | — |
| 2017 | 2.1 | 18.0% | — |
| 2018 | 2.4 | 21.0% | — |
| 2019 | 2.4 | 21.2% | — |
| 2020 | 2.5 | 22.1% | — |
| 2021 | 2.6 | 22.8% | — |
| 2022 | 2.5 | 21.8% | — |
| 2023 | 2.3 | 20.6% | — |
| 2024 | 2.2 | 18.9% | — |
| 2025 | 2.4 | 21.3% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| PV11 | Solar Photovoltaic | PV | 1.3 | 1.3 | Jan 2015 | Operating | — | coming soon |
Owner / operator
Operator: Ecos Energy LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Ecos Energy LLC | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Diamond Valley Lake | 30 MW | 3.6 km |
| West Valley High School Solar | 1 MW | 5.9 km |
| AP North Lake I, LP | 20 MW | 6.5 km |
| Tahquitz High School | 1 MW | 7.9 km |
| Menifee Power Bank | 680 MW | 9.4 km |
| EMWD - San Jacinto RWRF NEM | 1 MW | 10.8 km |