... is cut off,this rolling door motor (DC&AC available ) will turn to DC24 battery supply the power automatically ... we can make suitable products to you. 1) manufacture AC, DC, AC and DC Rolling Door Opener, design and make motors according to your ... request2) AC motor: 200KG—1500KG, DC motor: 300KG—600KG, AC and DC motor: 300KG—600KG3) 110V/220V/380V ...