Weymouth Solar Plant
Los Angeles County, California · EIA plant ID 60255 · Operator: Metropolitan Water District of S CA
Nameplate3MWSummer 3 MW
Generators2in service
Net generation3GWh12 mo to Dec 2025
Capacity factor12%solar units, summer MW
Heat rate—thermal plants only
First online2016
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) |
|---|---|---|---|
| 2016 | 2.8 | 18.4% | — |
| 2017 | 6.1 | 23.2% | — |
| 2018 | 5.7 | 21.7% | — |
| 2019 | 5 | 19.0% | — |
| 2020 | 5 | 19.0% | — |
| 2021 | 5.3 | 20.1% | — |
| 2022 | 6 | 22.7% | — |
| 2023 | 5 | 18.9% | — |
| 2024 | 4.8 | 18.3% | — |
| 2025 | 3.3 | 12.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 2 | 2 | Jun 2016 | Operating | — | coming soon |
| 2 | Solar Photovoltaic | PV | 1 | 1 | Jun 2016 | Operating | — | coming soon |
Owner / operator
Operator: Metropolitan Water District of S CA. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Metropolitan Water District of S CA | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Gilead Sciences La Verne Rooftop Solar | 3 MW | 1.4 km |
| San Dimas | 10 MW | 2.4 km |
| San Dimas Wash Generating Station | 1 MW | 2.7 km |
| VESI Pomona | 40 MW | 5.5 km |
| Walnut Unified School District Walnut HS Hybrid | 2 MW | 11.5 km |
| Industry MetroLink PV 1 | 2 MW | 12.6 km |