Tesla Signs Long-Term Solar Plus Storage PPA with ContourGlobal
Tesla has signed a long-term power purchase agreement (PPA) with ContourGlobal for approximately 1 terawatt-hour per year of renewable electricity from the Project Sterling hybrid solar and battery storage facility in Arizona. The project combines 509MWp/450MWac of solar PV generation with 360MW/1.4GWh of battery energy storage, making it one of the largest corporate PPAs for a single U.S. renewable asset. ContourGlobal acquired Project Sterling in December 2024 and has since modified its design to meet Tesla's needs. Major off-site construction began in 2025 with on-site work expected later this year, aiming for commercial operations by 2028. The PPA is a significant milestone for ContourGlobal as it expands into large-scale renewable energy projects. In addition, Tesla will also purchase the full output of another solar project, Lumen Farm in Texas, through a new PPA starting construction in 2027.
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Topics: battery storage corporate PPA renewable energy solar power