AES Alamitos Energy Center
Los Angeles County, California · EIA plant ID 62115 · Operator: AES Alamitos Energy, LLC
Nameplate678MWSummer 603 MW
Generators3in service
Net generation1,254GWh12 mo to Aug 2026
Capacity factor24%gas/coal/oil units, summer MW
Heat rate7,116Btu/kWhfossil units, electric fuel, HHV
First online2020Runs as baseload
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2020 | 1,233.8 | 25.4% | 7,100 |
| 2021 | 2,930.1 | 55.5% | 6,980 |
| 2022 | 3,451.9 | 65.3% | 6,943 |
| 2023 | 2,704 | 51.2% | 7,097 |
| 2024 | 2,397.9 | 45.3% | 6,893 |
| 2025 | 1,480.5 | 28.0% | 6,997 |
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 |
|---|---|---|---|---|---|---|---|---|
| 1A | Natural Gas Fired Combined Cycle | CT | 231 | 194 | Feb 2020 | Operating | — | coming soon |
| 1B | Natural Gas Fired Combined Cycle | CT | 231 | 194 | Feb 2020 | Operating | — | coming soon |
| 1S | Natural Gas Fired Combined Cycle | CA | 216 | 215 | Feb 2020 | Operating | — | coming soon |
Owner / operator
Operator: AES Alamitos Energy, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AES Alamitos Energy, LLC | 60.2% | 408 MW |
| Ullico Infrastructure Southland Borrower LLC | 39.8% | 270 MW |
Nearby plants
Within 80 km.
| AES Alamitos LLC | 1,115 MW | 0.2 km |
| Haynes | 1,739 MW | 0.3 km |
| AES ES Alamitos, LLC | 100 MW | 0.3 km |
| AES ES Alamitos 2 LLC | 82 MW | 0.3 km |
| CSU Long Beach Lots 7 & 14 | 5 MW | 2 km |
| CSU Long Beach | 3 MW | 2 km |