Power plants in Pinal County, Arizona

20 operating power plants in Pinal County, Arizona, with 4,940 MW of nameplate capacity, largest first. From EIA-860M, August 2026.

Plants

Nameplate capacity

4,940 MW

Net generation, 2025

6.06 TWh

19 of 20 plants reported

Largest

Coolidge Generation Station

1,023 MW

Largest power plants in Pinal County

#	Plant	MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	Coolidge Generation StationNatural gas	1,023	58.8	0.9%	Salt River Project
2	Desert BasinNatural gas	745	2,085	31.9%	Salt River Project
3	SundanceNatural gas	695	313	–	Arizona Public Service Co
4	Eleven Mile Solar CenterSolar and battery storage	600	793	31.7%	Eleven Mile Solar Center, LLC
5	Box Canyon (AZ)Solar	300	507*	–	BOCA bn, LLC
6	Storey Solar and StorageSolar and battery storage	210	301	29.4%	Storey Energy Center, LLC
7	Saint SolarSolar and battery storage	200	267	32.4%	Saint Solar LLC
8	Brittlebush SolarSolar	200	562	32.1%	Randolph Solar Park LLC
9	Flatland StorageBattery storage	200	–	–	Flatland Storage LLC
10	SaguaroNatural gas	185	118	7.3%	Arizona Public Service Co
11	Copper Crossing Energy and Research CentNatural gas and solar	153	4.3	–	Salt River Project
12	East Line SolarSolar	100	255	29.1%	AES Distributed Energy
13	Central Line Solar, LLCSolar	100	269	30.7%	AES Distributed Energy
14	West Line Solar, LLCSolar	100	259	29.5%	Foster Clean Power A LLC
15	Bonnybrooke PVSolar	50	90.8	20.7%	Salt River Project
16	Sandstone SolarSolar	45	117	29.7%	AES Distributed Energy
17	Pinal Central Energy Center HybridSolar and battery storage	30	55.9	33.2%	Pinal Central Energy Center, LLC
18	Union HS at Casa GrandeSolar	1.6	2.6	18.7%	Luminace Solar Holding, LLC
19	Vista Grande HS at Casa GrandeSolar	1.4	2.8	22.5%	Luminace Solar Holding, LLC
20	Banner Solar IronwoodSolar	1.4	4.0	32.5%	Imperator Solar, LLC

* Fewer than 12 months of 2025 reported, so the total is partial.

MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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