Pinal County, Arizona: solar, wind, and storage projects and permits
Planned power plants, county offices, and the rules for a utility-scale lease, a business system, or rooftop solar in Pinal County, county seat Florence.
Check land in Pinal CountyOpens the land report with the map on the county; click a spot for its flood, wetland, habitat, line-distance and parcel check.
What power plants are planned in Pinal County?
EIA's August 2026 survey lists 6 planned plants in Pinal County, about 2,272 MW in all. Operating today, per the same EIA file: 2,748 MW gas, 1,496 MW solar, 698 MW battery storage, 2 MW other.
What stands out in Pinal County
By capacity, battery storage leads in Pinal County with 1,200 MW at 5 plants, followed by solar (4 plants, 775 MW) and gas (1 plant, 297 MW); 4 plants pair two technologies on one site. The largest is THREE SISTERS Solar Generation and BESS, 600 MW of battery storage plus solar owned by THSI bn, LLC, approvals pending, with a planned start of 4/2029. Of the 6, 2 have approvals pending and 4 are under construction. They join the grids run by APS (3), Salt River Project (2) and DOPD (1). Each of the 6 plants has a different owner. Planned start dates run from 12/2026 to 4/2029.
A listing means an owner reported plans to EIA; plans change, and the planned date is the owner's own estimate.
Scroll the table sideways to see every column.
| Plant and owner | Type | MW | Stage | Planned start iThe month and year the owner told EIA it plans to begin operating. Owners change these dates often. |
|---|---|---|---|---|
| Kitt Solar301AK 8me LLC · AZPS | Battery storage + Solar | 200 | Under construction (over half done) | 12/2026 |
| Valley Farms Energy CenterValley Farms Energy Center, LLC · SRP | Battery storage | 400 | Under construction (up to half done) | 12/2027 |
| Coolidge Generation StationSalt River Project · SRP | Gas (combustion turbine) | 297 | Under construction (up to half done) | 7/2027 |
| Selma Energy CenterSelma Energy Center, LLC · DOPD | Battery storage + Solar | 275 | Under construction (up to half done) | 12/2027 |
| THREE SISTERS Solar Generation and BESSTHSI bn, LLC · AZPS | Battery storage + Solar | 600 | Approvals pending | 4/2029 |
| Sawtooth SolarEDF Renewables Development, Inc. · AZPS | Battery storage + Solar | 500 | Approvals pending | 6/2028 |
Source: U.S. Energy Information Administration, Form EIA-860M, August 2026 file, planned generators; utilities' own queues list many more requests. What the stages and grid codes mean.
What can Pinal County require of a project?
Arizona has no state siting permit for solar, wind, or battery plants and no state decommissioning law, so Pinal County's own zoning sets most of the rules; a transmission line of 115 kV or more needs a state certificate (state rules).
County rules and recent actions: On February 18, 2026, the Board of Supervisors denied three items for an approximately 8,122-acre solar and thermal generation project near Florence Junction. (KVOA)
Property taxesState trust landWater
Who to contact in Pinal County
Pinal County websiteAssessorPlanning and zoningFlood control district
Solar for homes and businesses in Pinal County
Arizona's export rates, HOA rules, and tax breaks for rooftop and on-site solar are set statewide and by your utility, not by the county: Arizona home and business solar rules · utility application links.
State and federal reviews
ADEQ stormwater coverage, Arizona Game and Fish review, historic preservation consultation, and federal wildlife screening can apply to a site in Pinal County: Arizona agency list.
Get the land report for a spot
Flood zone, wetlands, nearest power line, soils, and more for any point. Parcel acreage fills in automatically in Texas and 26 other states (not Arizona, which has no statewide parcel layer).