DC 24v to DC 12v Step Down 30A 360W Heavy Duty Truck Car Power Supply Adapter Converter Reducer Regulator for Auto Car Truck Vehicle Boat Solar System etc.(DC15-40V Inputs) https://www.amazon.com/dp/B01JAIC7OO/ref=cm_sw_r_apan_glt_i_P6FAD3R5480ZNYQDVPWB?_encoding=UTF8&psc=1