Tesla's utility-sized energy storage has become a practical reality. The tech company has introduced the Megapack, a container-sized battery meant for "large-scale" storage that could help quickly deploy renewable energy and even replace conventional "peaker" power plants that come online when there's high demand. A single Megapack has up to 3MWh of storage, or roughly 14 times the 210kWh of a Powerpack. That, in turn, leads to very rapid deployments. Tesla claimed it could deploy a clean 250MW, 1GWh power plant in less than three months, or four times faster than a similarly-sized fossil fuel plant.