Planned power projects in Maricopa, AZ

11 planned generator projects are listed for Maricopa County, AZ in the EIA-860M inventory, with a combined stated nameplate of 3792 MW. By type: Battery storage 8 · Gas or other fossil 2 · Solar 1.

Planned generators (EIA-860M)

Project	Type	Capacity	Status (as reported)	Planned online	Source
Maricopa Solar Maricopa Solar	Batteries	550 MW	(U) Under construction, less than or equal to 50 percent complete	Sep 2026	EIA-860M planned generators, file 2026-07
Saddleback Generation Station Copia Power	Natural Gas Fired Combined Cycle	1250 MW	(P) Planned for installation, but regulatory approvals not initiated	Dec 2030	EIA-860M planned generators, file 2026-07
Desert Sand BESS DESA bn, LLC	Batteries	300 MW	(L) Regulatory approvals pending. Not under construction	Dec 2028	EIA-860M planned generators, file 2026-07
Desert Sand BESS DESA bn, LLC	Solar Photovoltaic	300 MW	(L) Regulatory approvals pending. Not under construction	Dec 2028	EIA-860M planned generators, file 2026-07
Romero Energy Center Romero Energy Center, LLC	Batteries	225 MW	(U) Under construction, less than or equal to 50 percent complete	Jun 2027	EIA-860M planned generators, file 2026-07
Romero Energy Center II, LLC Romero Energy Center II, LLC	Batteries	225 MW	(U) Under construction, less than or equal to 50 percent complete	Jun 2028	EIA-860M planned generators, file 2026-07
Desert Bloom RE Desert Bloom LLC	Batteries	150 MW	(TS) Construction complete, but not yet in commercial operation	Aug 2026	EIA-860M planned generators, file 2026-07
Agave Arizona Public Service Co	Batteries	150 MW	(TS) Construction complete, but not yet in commercial operation	Sep 2026	EIA-860M planned generators, file 2026-07
Sierra Luna Energy Storage Sierra Luna Energy Storage LLC	Batteries	150 MW	(P) Planned for installation, but regulatory approvals not initiated	Dec 2030	EIA-860M planned generators, file 2026-07
White Tank Energy Storage White Tank Energy Storage LLC	Batteries	100 MW	(U) Under construction, less than or equal to 50 percent complete	Mar 2027	EIA-860M planned generators, file 2026-07
Red Hawk Arizona Public Service Co	Natural Gas Fired Combustion Turbine	392 MW	(U) Under construction, less than or equal to 50 percent complete	Oct 2027	EIA-860M planned generators, file 2026-07

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Sources

EIA-860M monthly generator inventory: https://www.eia.gov/electricity/data/eia860m/
LBNL Queued Up interconnection queue data: https://emp.lbl.gov/queues

Neither dataset records data centres or other electricity demand. Projects that are small, unreported or filed after the published dates do not appear.

QueueLedger reports public EIA and Lawrence Berkeley National Laboratory records of planned generators and interconnection requests near an address. It is not a utility, a developer, a regulator, an appraiser or a legal advisor, and a report says nothing about whether any project will be approved, built or cancelled.