Tesla’s large-scale energy storage product for utilities is called the Megapack. It is a stationary, container-sized lithium-ion battery system made by Tesla Energy for grid-scale storage projects.
Tesla launched the Megapack in 2019 as a successor to the smaller Powerpack for major installations. Utilities can deploy Megapacks in battery-storage plants to hold electricity and release it when demand rises, helping balance variable sources such as wind and solar. They can also support frequency regulation, backup power and other grid services.
The Megapack is often confused with Tesla’s Powerwall, but the products serve different customers and scales: Powerwall is designed primarily for homes, while Megapack is intended for commercial and utility projects. Powerpack is the older large-scale product, whereas Megapack is the newer utility-focused name. Capacity varies by generation; early versions were marketed at roughly 3 megawatt-hours, with later versions offering more.