Roof top mounted and Back Wall Mounted Cooling up to 9500Btu and 19800Btu. DC12V, DC24V, DC48V, DC72V, DC80V are available, NO AC power. Fully DC electric Battery-operated air-conditioning system. Brushless DC12V, DC24V, DC48V etc electric scroll compressor built-inside. Run by EV original battery directly or auxiliary battery bank.