Cunningham Solar I & BESS
Lea County, New Mexico · EIA plant ID 69258 · Operator: Southwestern Public Service Co
Nameplate108MWSummer 108 MW
Generators2in service
Net generation103GWh12 mo to Aug 2026
Capacity factor40%solar units, summer MW
Heat rate—thermal plants only
First online2026
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.
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 |
|---|---|---|---|---|---|---|---|---|
| CHCB | Batteries | BA | 36 | 36 | Apr 2026 | Operating | — | coming soon |
| CHCS1 | Solar Photovoltaic | PV | 72 | 72 | Apr 2026 | Operating | — | coming soon |
Owner / operator
Operator: Southwestern Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southwestern Public Service Co | 100.0% | 108 MW |
Nearby plants
Within 80 km.
| Cunningham Solar II | — | 1.3 km |
| Hobbs Generating Station | 682 MW | 6.8 km |
| Cunningham | 444 MW | 8.1 km |
| AC Ranch I | — | 8.3 km |
| AC Ranch II | — | 8.3 km |
| Maddox | 212 MW | 8.5 km |