Slate Hybrid
Kings County, California · EIA plant ID 63727 · Operator: GSRP
Nameplate440MWSummer 440 MW
Generators9in service
Net generation686GWh12 mo to Aug 2026
Capacity factor27%solar units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 9.7 | 13.1% | — |
| 2022 | 690.5 | 30.2% | — |
| 2023 | 701.6 | 27.7% | — |
| 2024 | 654.7 | 25.8% | — |
| 2025 | 727.2 | 28.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SL3EC | Solar Photovoltaic | PV | 67.5 | 67.5 | Mar 2022 | Operating | — | coming soon |
| SLATE | Solar Photovoltaic | PV | 50.5 | 50.5 | Nov 2021 | Operating | — | coming soon |
| SLB3C | Batteries | BA | 33.8 | 33.8 | Mar 2022 | Operating | — | coming soon |
| SLBES | Batteries | BA | 50 | 50 | Apr 2022 | Operating | — | coming soon |
| SLBPW | Batteries | BA | 10 | 10 | Mar 2022 | Operating | — | coming soon |
| SLBSV | Batteries | BA | 46.5 | 46.5 | Feb 2022 | Operating | — | coming soon |
| SLPWR | Solar Photovoltaic | PV | 26 | 26 | Mar 2022 | Operating | — | coming soon |
| SLSTN | Solar Photovoltaic | PV | 63 | 63 | Apr 2022 | Operating | — | coming soon |
| SLSVC | Solar Photovoltaic | PV | 93 | 93 | Feb 2022 | 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).
| RE Slate 1 LLC | 100.0% | 440 MW |
Nearby plants
Within 80 km.
| Henrietta D Energy Storage LLC | 10 MW | 0.9 km |
| RE Kent South, LLC | 20 MW | 0.9 km |
| RE Mustang LLC | 175 MW | 0.9 km |
| Mustang Two | 150 MW | 1.1 km |
| Westside Solar Power PV1 | 2 MW | 1.4 km |
| American Kings Solar, LLC | 128 MW | 1.5 km |