Tesla and ContourGlobal sign 1 TWh/year PPA for Sterling renewable project

Tesla and ContourGlobal have signed a long-term Power Purchase Agreement (PPA) for the Sterling Project, a hybrid solar PV and battery energy storage system in Arizona. The project features 450 MWac of solar PV and 360 MW/1.4 GWh of battery capacity, delivering about 1 TWh of renewable energy annually to Tesla. Construction began in 2025 with off-site work, on-site construction is planned for 2026, and commercial operation is targeted for 2028. Sterling will be ContourGlobal’s largest renewable asset and has firm transmission rights into California’s CAISO market.

• Sterling project combines 450 MWac solar and 360 MW/1.4 GWh batteries
• PPA covers ~1 TWh/year, 90% of the project’s annual output

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