DALIAN, China/OSAKA -- China's Dalian Rongke Power is competing with Japan's Sumitomo Electric Industries in capturing demand for a unique type of storage battery that will be crucial to expanding the use of renewable energy.
Rongke eyes lead in redox flow tech as Sumitomo Electric bets on mini units

Battery storage units from Dalian Rongke Power sit at an energy project in the Chinese city of Dalian. (Photo courtesy of Dalian Rongke Power)
DALIAN, China/OSAKA -- China's Dalian Rongke Power is competing with Japan's Sumitomo Electric Industries in capturing demand for a unique type of storage battery that will be crucial to expanding the use of renewable energy.