MANY MINDEDArizona solar farm nears completion as Tesla scales clean energy capacity
Tesla’s Project Sterling—a 450-megawatt (MW) AC solar farm under construction in Arizona’s Mohave County—is projected to include approximately 760,000 solar panels with 509 MW DC capacity. The facility will feature 300 lithium iron phosphate (LFP) battery storage containers capable of 360 MW output and storing 1.4 gigawatt-hours (GWh) of electricity. Covering over 2,000 acres in the Mojave Desert, it connects to California’s grid via the Western Area Power Administration and will transmit power to the state’s Independent System Operator market. Tesla has secured a power purchase agreement covering 90% of the project’s expected annual output of 1 terawatt-hour (TWh), which could reduce electricity costs for Arizona residents once operational. Construction began after ContourGlobal’s groundbreaking ceremony on October 6, 2026, with 400 workers employed through 2028. The project is expected to come online in 2028, though all output figures and timelines remain expected values. If completed, it would significantly increase clean energy capacity in the region while supporting the state’s transition to renewable power.
This expansion addresses Arizona’s growing energy demand through scalable solar generation and battery storage, directly lowering the cost of electricity for households and businesses. The project’s grid connection to California’s market also demonstrates how regional clean energy infrastructure can reduce costs across state lines. For now, the focus remains on construction completion—critical for realizing the potential to lower electricity prices for over 1 million residents in the region.
What to watch: Project Sterling’s 2028 completion timeline and whether the power purchase agreement’s 90% coverage translates to measurable cost reductions for Arizona households. Caveats: All output figures and completion dates are expected values; the panel count is approximate per the source’s phrasing.
Source: Electrek