West Line Solar, LLC
Pinal County, Arizona · EIA plant ID 66125 · Operator: Foster Clean Power A LLC
Nameplate100MWSummer 100 MW
Generators1in service
Net generation243GWh12 mo to Aug 2026
Capacity factor28%solar units, summer MW
Heat rate—thermal plants only
First online2022
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) |
|---|---|---|---|
| 2022 | 6.4 | 8.7% | — |
| 2023 | 276.5 | 31.6% | — |
| 2024 | 273.6 | 31.1% | — |
| 2025 | 258.6 | 29.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WESTL | Solar Photovoltaic | PV | 100 | 100 | Dec 2022 | Operating | — | coming soon |
Owner / operator
Operator: Foster Clean Power A LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Foster Clean Power A LLC | 100.0% | 100 MW |
Nearby plants
Within 80 km.
| Kitt Solar | — | 2.8 km |
| Sawtooth Solar | — | 7.6 km |
| Central Line Solar, LLC | 100 MW | 8.8 km |
| East Line Solar | 100 MW | 10.2 km |
| Selma Energy Center | — | 10.8 km |
| Eleven Mile Solar Center | 600 MW | 12.2 km |