Solar Star 2
Kern County, California · EIA plant ID 58389 · Operator: Solar Star California XX, LLC
Nameplate279MWSummer 275 MW
Generators6in service
Net generation769GWh12 mo to Aug 2026
Capacity factor32%solar units, summer MW
Heat rate—thermal plants only
First online2014
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) |
|---|---|---|---|
| 2014 | 380.1 | 46.4% | — |
| 2015 | 798.4 | 35.4% | — |
| 2016 | 767.8 | 31.8% | — |
| 2017 | 768.2 | 31.9% | — |
| 2018 | 790.1 | 32.8% | — |
| 2019 | 756.4 | 31.4% | — |
| 2020 | 727.9 | 30.1% | — |
| 2021 | 790.3 | 32.8% | — |
| 2022 | 796.6 | 33.1% | — |
| 2023 | 653.6 | 27.1% | — |
| 2024 | 715.3 | 29.6% | — |
| 2025 | 720.7 | 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 |
|---|---|---|---|---|---|---|---|---|
| AVS2 | Solar Photovoltaic | PV | 19.5 | 19 | Mar 2014 | Operating | — | coming soon |
| SS21 | Solar Photovoltaic | PV | 60 | 59 | Jul 2014 | Operating | — | coming soon |
| SS22 | Solar Photovoltaic | PV | 55.5 | 55 | Dec 2014 | Operating | — | coming soon |
| SS23 | Solar Photovoltaic | PV | 48 | 47 | Dec 2014 | Operating | — | coming soon |
| SS24 | Solar Photovoltaic | PV | 43.5 | 43 | Jun 2015 | Operating | — | coming soon |
| SS25 | Solar Photovoltaic | PV | 52.5 | 52 | Apr 2014 | Operating | — | coming soon |
Owner / operator
Operator: Solar Star California XX, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Solar Star California XX, LLC | 100.0% | 279 MW |
Nearby plants
Within 80 km.
| Tumbleweed Energy Storage | 125 MW | 2 km |
| Rosamond South 1 | 257 MW | 2.4 km |
| North Rosamond Solar LLC | 151 MW | 2.9 km |
| Willow Spring Solar, LLC | 108 MW | 2.9 km |
| Golden Fields Solar I, LLC | 54 MW | 3.3 km |
| Solar Star California, XLI, LLC | 54 MW | 3.3 km |