ZBB Energy Corporation is an energy company engaged in researching the manufacture of energy storage systems for utility companies, renewable energy generators, and commercial and industrial customers. ZBB Energy was formed in 1998 in Wisconsin as a holding company for its subsidiaries in the United States and Australia.

The ZBB zinc energy storage systems (ZESS) can be used by a variety of clients. Traditional energy companies need reliable systems to store surplus energy generated during off-peak periods, which is primarily during the summer months for highly populated areas like New York, Chicago, and Los Angeles. With more companies and private citizens using alternative energy sources like solar panels and wind turbines, there is a growing need for storage devices to keep the power available for customers who are “on” and “off” the grid. Then there are industrial or commercial organizations that need an uninterrupted power supply and power quality protection