Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Atlas IX La Paz County	Big Rock Solar Farm Imperial County
Capacity	150 MW	200 MW
Technology	Batteries	Batteries
Operator	Atlas IX LLC	Big Rock ESS Assets, LLC
Operating units	1	1
Latest 12-month generation	70.9 GWh	134.2 GWh
Latest complete-year capacity factor	—	—
National technology rank	#85 of 962	#48 of 962
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.