Edwards Sanborn E4
Kern County, California · EIA plant ID 65675 · Operator: Terra-Gen Operating Co-Hybrid
Nameplate249MWSummer 249 MW
Generators2in service
Net generation329GWh12 mo to Aug 2026
Capacity factor26%solar units, summer MW
Heat rate—thermal plants only
First online2022
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) |
|---|---|---|---|
| 2022 | 7.3 | 6.6% | — |
| 2023 | 226.9 | 17.5% | — |
| 2024 | 291.7 | 22.9% | — |
| 2025 | 321.3 | 25.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| BESS | Batteries | BA | 100 | 100 | Nov 2023 | Operating | — | coming soon |
| PV | Solar Photovoltaic | PV | 148.9 | 148.9 | Dec 2022 | Operating | — | coming soon |
Owner / operator
Operator: Terra-Gen Operating Co-Hybrid. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| EdSan 1B Group 1 Sanborn, LLC | 100.0% | 249 MW |
Nearby plants
Within 80 km.
| Edwards Sanborn E1B | 290 MW | 2.3 km |
| Sanborn BESS 4 | 47 MW | 2.4 km |
| Edwards Sanborn E5 | 115 MW | 2.6 km |
| Edwards Sanborn E3 | 38 MW | 3.5 km |
| Edwards Sanborn E2 | 258 MW | 3.7 km |
| Edwards Sanborn E1A | 293 MW | 3.9 km |