Tesla’s large-scale battery-storage product introduced in 2019 is called Megapack.
Megapack is a lithium-ion battery system designed for utility-scale projects rather than individual homes. It combines battery modules, power-conversion equipment, and thermal-management systems in a container-sized unit. Utilities and developers can use groups of Megapacks to store electricity, balance demand, and support renewable-energy installations.
The product is often confused with Tesla’s Powerwall, which is designed primarily for homes, and Powerpack, an earlier commercial and utility-storage system. Megapack belongs to the same broader energy-storage family but is intended for much larger deployments. Tesla introduced it in 2019 as part of its expansion beyond electric vehicles.
Megapack installations can help shift electricity from periods of low demand to periods of high demand. They can also provide grid services and make intermittent sources such as solar and wind easier to integrate. The product is therefore a stationary-energy counterpart to Tesla’s vehicle batteries.