There a several roof top kits. I have attached one below to see if this is something you are considering. A/C Roof Top Retrofit Kit by Curtis® with MULE PRO-DXT™ Power Kit is a compact low-profile roof top A/C unit containing an electrically driven R-134a refrigerant system utilizing a 12 volt electric scroll compressor Can be used with either the Hard Cab Enclosure with AS1 Glass Windshield (1KAPFXTCAS1) or Hard Cab Enclosure with Polycarbonate Windshield (1KAPFXTCA) Self-contained system is powered by a high amperage alternator (replacing the standard vehicle alternator) Low-Profile design Roof top mounted system integrates with cabin utilizing a custom pre-fabricated powder coated roof to ease installation and prevent corrosion Refrigerant hoses are not subject to engine vibrations due to compressor being contained in roof top unit (not mounted to the engine) Patent-pending dynamic control software to manage the vehicle electric power and prevent battery drain Powder Coated covers and housings made from light weight corrosion resistant aluminum 4 independently adjustable outlet vents provide airflow that can be directed by operators providing maximum comfort System is recirculating providing maximum cooling effect • 12,000BTU Output Roof top mounting maximizes cabin space while providing direct-able air flow onto the operators in the most efficient manner Operator Control: Compressor on/off, system on/off with 3 blower speeds, 4 adjustable louvered vents Hard Cab Enclosure with AS1 Glass Windshield (1KAPFXTCAS1) or Hard Cab Enclosure with Polycarbonate Windshield (1KAPFXTCA) required