Stateline Solar
San Bernardino County, California · EIA plant ID 58646 · Operator: Southern Power Co
Nameplate300MWSummer 300 MW
Generators7in service
Net generation640GWh12 mo to Dec 2025
Capacity factor24%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 | 10 | 12.2% | — |
| 2016 | 547.8 | 24.7% | — |
| 2017 | 657.7 | 25.0% | — |
| 2018 | 667.5 | 25.4% | — |
| 2019 | 644.1 | 24.5% | — |
| 2020 | 653.4 | 24.8% | — |
| 2021 | 638.9 | 24.3% | — |
| 2022 | 623.1 | 23.7% | — |
| 2023 | 618.5 | 23.5% | — |
| 2024 | 619.9 | 23.5% | — |
| 2025 | 640.1 | 24.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| STL | Solar Photovoltaic | PV | 75.9 | 76 | Dec 2015 | Operating | — | coming soon |
| STL2 | Solar Photovoltaic | PV | 34.1 | 34 | Dec 2015 | Operating | — | coming soon |
| STL3 | Solar Photovoltaic | PV | 37.9 | 38 | Jan 2016 | Operating | — | coming soon |
| STL4 | Solar Photovoltaic | PV | 37.9 | 38 | Feb 2016 | Operating | — | coming soon |
| STL5 | Solar Photovoltaic | PV | 37.9 | 38 | Apr 2016 | Operating | — | coming soon |
| STL6 | Solar Photovoltaic | PV | 37.9 | 38 | Jun 2016 | Operating | — | coming soon |
| STL7 | Solar Photovoltaic | PV | 37.9 | 38 | Jul 2016 | Operating | — | coming soon |
Owner / operator
Operator: Southern Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Desert Stateline, LLC | 100.0% | 300 MW |
Nearby plants
Within 80 km.
| Higgins Generating Station | 688 MW | 4.3 km |
| Silver State South Storage | 200 MW | 6.2 km |
| Ivanpah 3 | 133 MW | 7.8 km |
| Ivanpah 2 | 133 MW | 7.9 km |
| Silver State Solar Power South | 260 MW | 8 km |
| Ivanpah 1 | 126 MW | 8.8 km |