September 23, 2026

Tesla Megapack 2 XL to Power 200 MW/800 MWh BESS

Tesla Megapack 2 XL will power Arevon’s Condor BESS (Battery Energy Storage System) with a capacity of 200 MW/800 MWh. The project is under construction on the site of a former steam power plant in Grand Terrace, San Bernardino County, California.

The location has close access to an electrical substation and transmission system, according to ESS News. The site was previously home to the Highgrove Steam Plant, which was decommissioned in 2021 after nearly 50 years in operation. Arevon’s project started in February 2023. It is one of several of its and Tenaska battery storage projects that are pursued in California.

“The project site location has a history of supporting regional energy needs, so it’s ideal for the Condor project, which will power the transition to more renewable energy sources,” said Tim Hemig, Senior Vice President in Tenaska’s Development Group. “It represents California’s continued evolution toward a more reliable and sustainable energy future.”

The Condor project is equipped with Tesla Megapack 2 XL batteries, designed specifically for utility use. Tesla shared photos from the site on X on Friday. Each unit offers 3.9 MW of power and 15.6 MWh of energy storage. Megapacks are assembled at the company’s Megafactory in Lathrop, California. Currently, Tesla is also building another Megafactory that will produce energy storage systems in Shanghai, China. Once fully operational, each factory will be able to supply up to 40 GWh of Megapacks annually.

With projects like Concorde, Tesla continues its rapid development. 2024 is expected to be the first year in which the company’s energy storage segment’s deployment and revenue growth rates will outpace its automotive business. In the second quarter of 2024, Tesla Energy posted its highest quarterly deployment figure in history. It amounted to 9.4 GWh. The company’s cumulative deployments this year have already reached 13.5 GWh as of the end of June.

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