Mount Signal Solar Farm II
Imperial County, California · EIA plant ID 61353 · Operator: GSRP
Nameplate154MWSummer 154 MW
Generators1in service
Net generation355GWh12 mo to Aug 2026
Capacity factor26%solar units, summer MW
Heat rate—thermal plants only
First online2020
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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) |
|---|---|---|---|
| 2019 | 32.3 | — | — |
| 2020 | 416.9 | 30.9% | — |
| 2021 | 384.2 | 28.6% | — |
| 2022 | 358.9 | 26.7% | — |
| 2023 | 297.7 | 22.1% | — |
| 2024 | 408.4 | 30.3% | — |
| 2025 | 402.5 | 29.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| IVS2 | Solar Photovoltaic | PV | 153.5 | 153.5 | Jan 2020 | Operating | — | coming soon |
Owner / operator
Operator: GSRP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Imperial Valley Solar 2, LLC | 100.0% | 154 MW |
Nearby plants
Within 80 km.
| Wistaria Ranch Solar | 107 MW | 1.3 km |
| Centinela Solar Energy | 175 MW | 2.7 km |
| Imperial Solar Energy Center South | 129 MW | 2.8 km |
| Imperial Valley Solar, LLC | 200 MW | 3.9 km |
| LeConte Energy Storage | 125 MW | 4 km |
| Drew Solar LLC | 100 MW | 4 km |