Plant X Solar
Lamb County, Texas · EIA plant ID 69435 · Operator: Southwestern Public Service Co
Nameplate150MWSummer 150 MW
Generators1in service
Net generation218GWh12 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 |
|---|---|---|---|---|---|---|---|---|
| PLXS | Solar Photovoltaic | PV | 150 | 150 | 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% | 150 MW |
Nearby plants
Within 80 km.
| Plant X | 190 MW | 0.6 km |
| Tolk | 1,136 MW | 15.3 km |
| Blue Cloud Wind Energy LLC | 148 MW | 27.8 km |
| Hart Wind | 166 MW | 40.1 km |
| Bethel Wind Farm LLC | 276 MW | 46 km |
| Changing Winds | — | 50.4 km |