Overview
- The PPA, announced July 29–30, covers about 1 terawatt‑hour per year of bundled electricity and renewable energy certificates and will take roughly 90% of Project Sterling’s expected annual output.
- Project Sterling pairs roughly 509 MWp/450 MWac of solar PV with 360 MW/1.4 GWh of battery storage so the site can time‑shift variable solar into more dependable, dispatchable power.
- The facility is physically tied to the Western Area Power Administration grid, holds firm point‑to‑point transmission rights into CAISO, and will be pseudo‑tied so Arizona generation can be scheduled to serve California demand.
- ContourGlobal bought and redesigned the project in December 2024, completed major off‑site procurement in 2025, plans on‑site groundbreaking in 2026, and targets commercial operation in 2028.
- ContourGlobal says this is its largest renewable asset and biggest PPA to date, a deal that will supply Tesla with long‑term clean energy for California and signal ContourGlobal’s deeper push into U.S. renewables.