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. Launched in 2019, a Megapack can store up to 3.9 megawatt-hours (MWh) of electricity. Each Megapack is a container of similar size to an intermod. On April 30, 2015, Tesla announced that it would sell standalone battery storage products to consumers and utilities. Each Megapack comes with a 15-year "no defect" and "energy retention" warranty. A 10 or 20 year "performance guarantee" is available for an additional cost. Once a Megapack has reached the end of its useful life, Tesla says th. The Megapack thermal management system is located at the top of each unit. It uses coolant fluid, made of an equal-parts mixture of and water, to keep the battery at operating temperature. Each Megapack. Grid batteries are used for such as control of frequency and phase,, etc. Megapacks are designed for large-scale energy storage. Megapacks are used by utilities to replace. In November 2019, Tesla used a Megapack to power a mobile recharging station for Tesla electric vehicles in California. The mobile Supercharger delivered 125 kW, and was transported on a flat trailer attached to a truc. Grid-scale battery standards and fire containment practices are at an early stage of development. Fire risks are one factor that has delayed the deployment of some utility energy storage systems.