The Tesla Megapack is a large-scale rechargeable lithium-ion battery stationary energy storage product, intended for use at battery storage power stations, manufactured by Tesla Energy, the energy subsidiary of Tesla, Inc. . Tesla's Shanghai Megafactory has quietly hit a major production milestone. According to People's Daily Online, the company produced more than 2,000 Megapack energy storage systems in 2025, marking the facility's first full year of operation and reinforcing Tesla Energy's rapid global expansion. Launched in 2019, a Megapack can store up to 3. 9 megawatt-hours (MWh) of. . By strengthening its battery production capacity in China, Tesla is positioning itself at the center of the world's fastest-growing renewable energy and electric vehicle (EV) market. China plays a critical role in Tesla's global strategy. As the largest EV market and one of the most ambitious. . U.
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