Arbor Hill Solar — Plant Summary
- EIA Plant ID
- 64755
- Capacity
- 25 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Adair, IA
- Operating Since
- 2022
- Generators
- 1
- Operator
- MidAmerican Energy Co
- Parent Company
- Berkshire Hathaway
- Annual Generation
- 45,121 MWh
- Capacity Factor
- 20.6%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Arbor Hill Solar
OperatingSolar
Ranked #8 of 31 Solar plants in IA#1520 of 7447 nationally
25 MW Solar operating in Adair, IA — Midcontinent Independent Transmission System Operator, Inc..
EIAGEMWD
25 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2022
Operating Since
Location
Coordinates
41.4619, -94.2754
County
Adair, IA
Nearby Plants
- Arbor Hill Wind FarmWind310 MW · 4.6 km
- Wind GEMWind1.9 MW · 5.4 km
- Gilliam SouthDistillate Oil4.3 MW · 5.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | MidAmerican Energy Co | MidAmerican Energy | — |
| Owner(s) | MidAmerican Energy Co | Berkshire Hathaway | — |
| Status | Operating | operating | — |
Ownership Chain
About
Arbor Hill Solar is a 25 MW solar photovoltaic power plant located in Adair County, Iowa. The plant, which began operating in 2022, is owned by Berkshire Hathaway and operated by MidAmerican Energy Co. It utilizes single-axis tracking technology to maximize solar energy capture. The plant is interconnected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority and resides within the MRO NERC region. Arbor Hill Solar is ranked as the 8th largest solar plant in Iowa out of 31, and 1323rd nationally out of 7108.
In its most recent year of operation, Arbor Hill Solar generated 45,121 MWh of electricity, resulting in a capacity factor of 20.6%. Financial data indicates an installed cost of $1619.49 per kW, as reported to FERC. The plant consists of a single generator.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
345 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
1.3K MWh
Latest Month
45.1K MWh
Annual Generation
20.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$1,621/kW
Installed Cost
MidAmerican Energy Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Arbor Hill Substation · 345 kV
Substation Distance
< 10 km
Operator
MidAmerican Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
MEC.ARBHILL_S
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (6)Beta
Hazards·wildfire
Red Flag Warning: Sac; Calhoun; Crawford; Carroll; Greene; Boone; Audubon; Guthrie; Dallas; Polk; Cass; Adair; Madison
Red Flag Warning issued March 21 at 9:44AM CDT until March 21 at 10:00PM CDT by NWS Des Moines IA
NWS Des Moines IA·5 days ago
Hazards·wildfire
Wind Power Doesn’t Make Sense: “An Extremely Rare Occurrence”
A wind turbine motor made by Vestas caught fire at MidAmerican's Diamond Trail Wind Farm in Iowa. Dramatic photos of the blaze taken by the local fire...
Vestas (other)MidAmerican (operator)
Capital Research Center·1 years ago
Hazards·wildfire
VIDEO | Turbine blazes at Warren Buffett-owned MidAmerican wind farm
A Vestas turbine at a MidAmerican Energy-owned wind farm in Adair County, Iowa, caught fire Tuesday in dramatic footage captured by local newscasts.
Vestas (other)MidAmerican Energy (operator)
Recharge News·2 years ago
Industry·corporate
MidAmerican Energy Abandons Plan To Add 30 Wind Turbines, Madison County Residents Celebrate: ‘How Awesome’
In Madison County, Iowa, the power of the people has prevailed over the money and political influence of Big Wind.
MidAmerican Energy (operator)
Forbes·3 years ago
Last updated 2026-03-21
View all 6 articles