... cooled. Open type or silent type. Delivery: in 30days Diesel generator set:Engine: Cummins ,Perkins,Deutz,Weichai,Weifang,quanchai,shangchai,etc.etc ... -cooledStarting battery12V/100AH2×12V/100AHGensetfor protectionThe protection of low accumulator,overspeed,high water temperature,low press-gasNoise Level(at 7m)75dBCont.working ...