Chambers 4 - Rialto LGB8
San Bernardino County, California · EIA plant ID 65253 · Operator: GSRP
Nameplate2MWSummer 2 MW
Generators1in service
Net generation3GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2018
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 | 2.8 | 14.6% | — |
| 2022 | 0 | 0.0% | — |
| 2023 | 3.5 | 18.1% | — |
| 2024 | 4.3 | 22.1% | — |
| 2025 | 3.2 | 16.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Solar Photovoltaic | PV | 2.2 | 2.2 | Dec 2018 | 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).
| GRE Fund 4 LGB8 | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Niagara Bottling - Rialto | 4 MW | 1.2 km |
| Inland Empire Energy Storage | 70 MW | 1.3 km |
| Solar Photovoltaic Project #26 | retired | 1.8 km |
| Fontana | 3 MW | 3 km |
| Solar Photovoltaic Project #03 | retired | 3.9 km |
| IOS II-LAX9 | 4 MW | 6 km |