
A battery energy storage system (BESS) or battery storage power station is a type of technology that uses a group of to store . Battery storage is the fastest responding on , and it is used to stabilise those grids, as battery storage can transition from standby to full power in under a second to deal with . A megawatt-hour (MWh) is the unit used to describe the amount of energy a battery can store. Take, for instance, a 240 MWh lithium-ion battery with a maximum capacity of 60 MW. Now imagine the battery is a lake storing water that can be released to create electricity. A 60 MW system with 4 hours of storage could work in a number of ways:

According to Philip Davis, the Prime Minister of the Bahamas, the government will invest US$14.2 million into the installation of a 25 MW battery energy storage system at the Baillou Hill Power Plant.