Tesla signs long-term deal to buy solar and battery power in Arizona

Tesla has signed a long-term agreement to purchase electricity from Project Sterling, a solar and battery storage facility in Arizona developed by ContourGlobal. The deal covers 90% of the plant’s expected output, which will feature 509 MW of solar generation and a 360 MW battery system capable of delivering power for nearly four hours. The project is expected to start operations in 2028 and generate about one terawatt-hour annually, with Tesla buying the majority. This deal is unusual for Tesla, which has historically relied on local utilities for its power needs.

• Agreement covers 90% of Project Sterling output
• Project includes 509 MW solar and 360 MW battery
• Operations expected to begin in 2028

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