500 MWh Tesla Megapack battery goes live in Texas

Tesla has activated a 500 MWh energy storage system using Megapacks in Texas at Ørsted's Old 300 Storage project. Located in Needville near Houston, the system can deliver 250 MW for two hours, connected to the ERCOT grid. The Megapacks, built at the Lathrop Megafactory in California, integrate battery modules, inverters, and thermal management into one unit, simplifying installation. Each unit provides 1.9 MW and 3.85 MWh. This system supports demand management and grid stability, especially under extreme weather. Old 300 Storage operates alongside the 430 MW Old 300 Solar farm but functions

• Old 300 Storage system delivers 250 MW for two hours in Texas
• Each Megapack provides 1.9 MW and 3.85 MWh of storage

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