Imperial Solar Energy Center West
Imperial County, California · EIA plant ID 57491 · Operator: CSOLAR IV West LLC
Nameplate149MWSummer 149 MW
Generators1in service
Net generation357GWh12 mo to Dec 2025
Capacity factor27%solar units, summer MW
Heat rate—thermal plants only
First online2016
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) |
|---|---|---|---|
| 2016 | 315.3 | 32.1% | — |
| 2017 | 390.6 | 30.0% | — |
| 2018 | 377.3 | 29.0% | — |
| 2019 | 394.9 | 30.3% | — |
| 2020 | 390 | 29.9% | — |
| 2021 | 401.3 | 30.8% | — |
| 2022 | 428 | 32.9% | — |
| 2023 | 388.3 | 29.8% | — |
| 2024 | 373.6 | 28.6% | — |
| 2025 | 357 | 27.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 56819 | Solar Photovoltaic | PV | 148.7 | 148.7 | Apr 2016 | Operating | — | coming soon |
Owner / operator
Operator: CSOLAR IV West LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tenaska CSOLAR West Holdings, LLC | 74.0% | 110 MW |
| CD Global Solar II, CSOLAR, LLC | 25.0% | 37 MW |
| Tenaska CSOLAR West, LLC | 1.0% | 2 MW |
Nearby plants
Within 80 km.
| SEPV Imperial Dixieland East | 2 MW | 2.3 km |
| SEPV Imperial Dixieland West | 3 MW | 2.4 km |
| Kingsley Solar Farm | — | 5.3 km |
| Campo Verde Solar | 147 MW | 5.4 km |
| Centinela State Prison | 6 MW | 6 km |
| CED West Side Canal Battery Storage | 131 MW | 7.4 km |