The hydropower sells energy and keeps the batteries charged up while the battery does the fast response work required by PJM's frequency regulation market. Hybrid renewable power projects that combine different forms of power production with battery storage are set to open across Australia and the US . Among them is the Queensland Energy Park being developed in Queensland , which will combine 43.2 MW of wind power with 15 MW of solar and 2 MW of storage . The Buck and Byllesby hydroelectric plants in Virginia in the US will also be fitted with battery storage , improving their reliability and performance . The projects are expected to be the first of many built in the two countries .
Hybrid renewable power projects that combine different forms of power production with battery storage are set to open across Australia and the US . Among them is the Queensland Energy Park being developed in Queensland , which will combine 43.2 MW of wind power with 15 MW of solar and 2 MW of storage . The Buck and Byllesby hydroelectric plants in Virginia in the US will also be fitted with battery storage , improving their reliability and performance . The projects are expected to be the first of many built in the two countries .