Arbor Hill Solar
Adair County, Iowa · EIA plant ID 64755 · Operator: MidAmerican Energy Co
Nameplate25MWSummer 24 MW
Generators1in service
Net generation46GWh12 mo to Aug 2026
Capacity factor22%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 | 36.4 | 17.3% | — |
| 2023 | 44.4 | 21.1% | — |
| 2024 | 43.3 | 20.5% | — |
| 2025 | 45.1 | 21.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| AHS | Solar Photovoltaic | PV | 25 | 24 | Jan 2022 | Operating | — | coming soon |
Owner / operator
Operator: MidAmerican Energy Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| MidAmerican Energy Co | 100.0% | 25 MW |
Nearby plants
Within 80 km.
| Stuart (IA) | 3 MW | 6.1 km |
| Gilliam South | 4 MW | 6.3 km |
| Wind GEM | 2 MW | 6.4 km |
| Arbor Hill Wind Farm | 310 MW | 7 km |
| Wolverine | 2 MW | 17.2 km |
| Meadow Ridge | 2 MW | 17.5 km |