Power plants in Maricopa County, Arizona

78 operating power plants in Maricopa County, Arizona, with 23,717 MW of nameplate capacity, largest first. From EIA-860M, August 2026.

Plants

Nameplate capacity

23,717 MW

Net generation, 2025

79.0 TWh

69 of 78 plants reported

Largest

Palo Verde

4,210 MW

Largest power plants in Maricopa County

#	Plant	MW	2025 net generation, GWhGWh, 2025	Capacity factor	Operator
1	Palo VerdeNuclear	4,210	31,322	84.9%	Arizona Public Service Co
2	SantanNatural gas	1,326	4,641	40.0%	Salt River Project
3	Harquahala Generating ProjectNatural gas	1,277	2,897	25.9%	New Harquahala Generating Co, LLC
4	West PhoenixNatural gas	1,207	4,277	40.4%	Arizona Public Service Co
5	Red HawkNatural gas	1,127	4,843	49.1%	Arizona Public Service Co
6	OcotilloNatural gas	806	443	6.3%	Arizona Public Service Co
7	Sonoran Solar EnergySolar and battery storage	750	1,077	26.2%	Sonoran Solar Energy, LLC
8	Agua FriaNatural gas	738	244	4.0%	Salt River Project
9	Arlington Valley Energy FacilityNatural gas	713	3,345	53.6%	Arlington Valley LLC
10	Mesquite Generating Station Block 2Natural gas	692	3,951	65.2%	Mesquite Power LLC
11	Mesquite Generating Station Block 1Natural gas	692	3,522	58.1%	Salt River Project
12	Gila River Power Block 4Natural gas	619	2,671	49.3%	Salt River Project
13	Gila River Power Block 1Natural gas	619	2,561	47.2%	Salt River Project
14	Gila River Power Block 3Natural gas	619	2,914	53.7%	Salt River Project
15	Gila River Power Block 2Natural gas	619	2,890	53.3%	Salt River Project
16	Sun Streams 4Solar and battery storage	600	647*	–	Sun Streams Expansion, LLC
17	Harquahala 2Solar and battery storage	600	648*	–	Copia Power
18	Maricopa SolarSolar	550	–	–	Maricopa Solar
19	KyreneNatural gas	488	1,008	–	Salt River Project
20	Catclaw SolarSolar and battery storage	450	–	–	311SV 8me, LLC
21	Sun Streams 3Solar and battery storage	430	493	28.3%	Sun Streams PVS, LLC
22	Papago Energy StorageBattery storage	300	0.0*	–	RE Papago LLC
23	Solana Generating StationSolar	280	846	34.5%	Arizona Solar One LLC
24	Sierra Estrella Energy StorageBattery storage	250	−42.2	–	Sierra Estrella Energy Storage, LLC
25	Beehive Energy StorageBattery storage	250	–	–	Beehive Energy Storage, LLC
26	Pediment BESS IBattery storage	250	–	–	Pediment BESS I LLC
27	WestwingBattery storage	200	−21.7	–	AES Clean Energy
28	Mesquite Solar 1Solar	170	392	26.3%	RWE Clean Energy
29	Scatter Wash 1Battery storage	170	−21.8*	–	Scatter Wash Energy Storage, LLC
30	Sun PondSolar and battery storage	170	–	–	Sun Pond, LLC
31	Sun Streams, LLCSolar	160	412	29.4%	EDP Renewables North America LLC
32	Mesquite Solar 3, LLCSolar	150	443	33.7%	RWE Clean Energy
33	Sun Streams 2Solar	150	328	25.0%	Sun Streams 2, LLC
34	Harquahala Sun Solar ProjectSolar	150	317*	–	Copia Power
35	AgaveSolar	150	298	22.7%	Arizona Public Service Co
36	Papago PVSolar	150	–	–	RE Papago PV LLC
37	Justice Energy StorageBattery storage	150	–	–	Strata Clean Energy
38	Arlington Valley Solar Energy IISolar	129	336	29.7%	Arlington Valley Solar Energy II LLC
39	Arlington Valley Solar Energy ISolar	127	–	–	RWE Clean Energy
40	Mesquite Solar 5, LLCSolar and battery storage	120	134	27.3%	RWE Clean Energy
41	Horse MesaPumped storage	120	87.9	–	Salt River Project
42	Mesquite Solar 2, LLCSolar	100	286	32.6%	RWE Clean Energy
43	Superstition Energy StorageBattery storage	90	−15.9	–	Superstition Energy Storage, LLC
44	Scatter Wash 2Battery storage	85	−10.4*	–	Scatter Wash Energy Storage, LLC
45	Red RockSolar and battery storage	85	85.9	23.5%	Arizona Public Service Co
46	Pluto Energy StorageBattery storage	75	−12.2*	–	Pluto Energy Storage, LLC
47	Gila Bend HybridSolar and battery storage	68	72.1	24.5%	Arizona Public Service Co
48	Mormon FlatPumped storage	64	45.7	–	Salt River Project
49	Mesquite Solar 4, LLCSolar	63	144	31.7%	RWE Clean Energy
50	El Sol BESSBattery storage	50	−6.9	–	Invenergy Services LLC
51	WaddellPumped storage	40	−18.7	–	Central Arizona Water Conservation Dist
52	RooseveltHydro	36	76.0	24.1%	Salt River Project
53	Cotton Center Solar HybridSolar and battery storage	34	29.4	21.8%	Arizona Public Service Co
54	Paloma Solar HybridSolar and battery storage	34	30.2	22.4%	Arizona Public Service Co
55	Desert Star HybridSolar and battery storage	20	24.2	30.0%	Arizona Public Service Co
56	Queen Creek Solar FarmSolar	19	34.8	20.9%	Siete Solar LLC
57	Arizona State University CHPNatural gas	17	40.0	26.7%	Energy Center Phoenix LLC
58	Saddle Mountain Solar ISolar	15	33.3	25.4%	SunE AZ2, LLC
59	RE Gillespie 1 LLCSolar	15	38.7	29.4%	MN8 Energy LLC
60	Badger 1Solar	15	29.6	22.8%	Desert Sky Solar LLC
61	Stewart MountainHydro	13	36.6	32.1%	Salt River Project
62	Luke SolarSolar	11	27.4	27.9%	Arizona Public Service Co
63	Lake Pleasant WTPSolar	6.5	13.9	24.4%	MN8 Energy LLC
64	Mesa Carport PVSolar	4.6	5.0	12.5%	Apple, Inc
65	Intel - Ocotillo Campus SolarSolar	4.2	3.1	8.5%	Tesla Inc.
66	Buckeye Union HS District 201Solar	3.3	6.8	23.4%	Luminace Solar Arizona, LLC
67	Northwest RegionalLandfill gas	3.2	21.2	75.8%	WM Renewable Energy LLC
68	Macys GoodyearSolar	3.1	–	–	Macys Corporate Services, Inc
69	TJX PhoenixSolar	2.9	6.1	24.1%	SoCore Energy LLC
70	Amazon GoodyearSolar	2.4	5.1	24.2%	Westbound Solar 3, LLC
71	AZ State University - Tempe Campus SolarSolar	2.2	1.9	–	Arizona State University FDM
72	Gilbert Solar Facility I, LLCSolar	2.0	4.0	23.1%	Gilbert Solar Facility I, LLC
73	Estrella Mountain PVSolar	1.8	3.1	19.7%	Tesla Inc.
74	Phoenix Airport Rental Car CenterSolar	1.6	4.2	29.7%	SunStrong Management, LLC
75	Paradise Valley H.S. PVSolar	1.3	2.1	18.3%	AES Distributed Energy
76	T0588 Phoenix - AZSolar	1.2	2.2	20.6%	SoCore Energy LLC
77	Jewish Community Center PVSolar	1.1	2.0	21.1%	AES Distributed Energy
78	Phoenix Airport East Economy LotSolar	1.1	0.8	8.1%	SunStrong Management, 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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