SOLANA GENERATING STATION
OperatingSolar power plant
- Capacity
- 295 MW
- Primary fuel
- Solar
- County
- Maricopa County
- Operator
- ARIZONA SOLAR ONE LLC
- Status
- Operating
- Commissioned
- 2013
- EIA plant ID
- 56812
- Generators
- 2
- Technology
- Solar Thermal with Energy Storage
- Net generation (2024)
- 828 GWh
- Capacity factor (2024, EIA nameplate)
- 34%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 32.9223, -112.9559
SOLANA GENERATING STATION, a 295 MW Solar power plant in Maricopa County, Arizona. Operated by ARIZONA SOLAR ONE LLC, commissioned 2013.
How SOLANA GENERATING STATION compares
With 295 MW of capacity, SOLANA GENERATING STATION ranks 27th among the 71 operating power plants Bywatts maps in Arizona and is the largest of the 26 operating Solar plants in the state. It accounts for about 23% of Arizona's operating Solar capacity and 1.0% of all operating capacity in the state. Nationally it is the 6th-largest of the 639 operating Solar plants in the database. Commissioned in 2013, it is newer than 78% of the 69 operating Arizona plants with a recorded commissioning year. It shares Maricopa County with 28 other operating plants, including PALO VERDE and SANTAN.
EIA-860 lists 2 generators at the site with 280 MW of nameplate capacity, all solar thermal with energy storage technology. Net generation was 828 GWh in 2024 (a 34% capacity factor), up 19% from 2022.
Grid neighborhood
The nearest named substation is SOLANA (230 kV), about 1.3 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by ARIZONA PUBLIC SERVICE COMPANY, about 0.2 miles away. Another 8 operating power plants totaling 2,594 MW sit within 25 miles; the largest is SUNDEVIL POWER HOLDINGS - GILA RIVER (1,238 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
SOLANA GENERATING STATION is a 295 MW solar power plant in Maricopa County, AZ, operated by ARIZONA SOLAR ONE LLC, commissioned in 2013. Maricopa County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.7 of 5 at the 42nd national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 85th percentile.
Maricopa County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Share of modeled loss | Events per year |
|---|---|---|---|---|---|
| Wildfire | Relatively High | 85th | 4.4 of 5 | 5% | <0.01 |
| Riverine flooding | Very High | 85th | 4.4 of 5 | 10% | 8.5 |
| Heat wave | Very High | 71st | 3.9 of 5 | <1% | 19.8 |
| Hail | Very High | 56th | 3.2 of 5 | 84% | 0.28 |
| Earthquake | Relatively Moderate | 49th | 3.0 of 5 | <1% | 0.01 |
| Strong wind | Very High | 19th | 1.8 of 5 | 1% | 1.4 |
| Tornado | Relatively Moderate | 7th | 1.3 of 5 | <1% | 0.57 |
| Lightning | Relatively High | 3rd | 1.1 of 5 | <1% | 32.3 |
| Winter weather | Relatively Low | 1st | 1.1 of 5 | <1% | 0.57 |
| Hurricane | Very Low | 0th | 1.0 of 5 | <1% | 0.01 |
Perils not assessed in Maricopa County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
| Ice storm | FEMA rating is "Not Applicable" for this county |
Hail exposure and deductible structure
Hail scores 3.2 of 5, which sits in the 2% to 5% percentage deductible range carriers are quoting for that exposure. Named windstorm and severe convective wind score 1.8 of 5, indicating a 1% to 1% wind deductible. Ranges, not single figures. The final structure is set by the carrier.
Percentage hail deductible range: 2% to 5% of insured value. Wind deductible range: 1% to 1%. These are the structures commonly seen at this exposure, not an offer and not a rate.
Modeled annual loss for a 295 MW solar array
At an assumed replacement value of $0.90 per watt, or $265.5M insured, the modeled expected annual loss for a fixed tilt ground mount array in Maricopa County is $179,657 a year, $609 per MW, 0.07% of insured value.
Heat is modeled as a production risk rather than a property loss: 2.1% of annual yield in this county.
Insurability signal: Standard. Hail carries 84% of modeled loss.
Model hail, wind and flood exposure for Maricopa County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile, and the modeled loss applies the Bywatts solar vulnerability layer. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level. The solar vulnerability layer that turns FEMA building loss into modeled solar loss was derived by Bywatts and revised on physical reasoning. It has not been reviewed by a practising underwriter.