ATLAS SOLAR IVUnder construction
La Paz County, Arizona · EIA plant ID 69055 · Operator: ATLAS SOLAR IV, LLC
300 MW under construction (Solar Photovoltaic), first expected Oct 2026 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service · 300 MW building
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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 |
|---|---|---|---|---|---|---|---|---|
| ALTS4 | Solar Photovoltaic | PV | 300 | 300 | planned Oct 2026 | Under construction | — | coming soon |
Owner / operator
Operator: ATLAS SOLAR IV, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| ATLAS II | — | 0 km |
| Atlas BESS IV LLC | — | 0 km |
| Atlas IX | 150 MW | 0 km |
| Atlas VIII | — | 0 km |
| Atlas VII | 300 MW | 0 km |
| ATLAS Solar VI, LLC | 100 MW | 0.5 km |