McFarland B Solar and Storage
Yuma County, Arizona · EIA plant ID 66637 · Operator: aes clean energy
Nameplate450MWSummer 450 MW
Generators2in service
Net generation799GWh12 mo to Aug 2026
Capacity factor31%solar units, summer MW
Heat rate—thermal plants only
First online2024
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) |
|---|---|---|---|
| 2024 | 9.3 | 4.3% | — |
| 2025 | 600.5 | 23.3% | — |
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 | 150 | 150 | Dec 2024 | Operating | — | coming soon |
| MCFRB | Solar Photovoltaic | PV | 300 | 300 | Dec 2024 | Operating | — | coming soon |
Owner / operator
Operator: aes clean energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| aes clean energy | 100.0% | 450 MW |
Nearby plants
Within 80 km.
| McFarland A Solar and Storage | 300 MW | 1.5 km |
| Elisabeth Solar | — | 1.8 km |
| McFarland C | 185 MW | 1.9 km |
| Agua Caliente Solar Project | 348 MW | 2.8 km |
| White Wing Solar | 179 MW | 5.1 km |
| Sierra Pinta BESS | 113 MW | 5.2 km |