Flow batteries

Another battery technology is called a flow battery, where liquid electrolytes from one chamber flow to another to cause a chemical reaction for either storing or discharging electricity. ZBB Energy is using its zinc-bromide flow batteries, pictured here, to reduce congestion at a substation. The system will be able to supply 2 megawatts of power and store 2 megawatt-hours of energy. The idea is to have a mobile unit so that it can be moved to where peak loads are happening.