Defiance San Juan 220 Pilothouse Boat Show you how I install DC split unit. Uses R123a preloaded in unit. 6000 BTU 20 seer Dakota Lithium Batteries Wanted Air cooled so I can use at home or anywhere. UNIT: https://amzn.to/3j1msZb RV caulk: https://amzn.to/3y4OOX0 Vacuum kit: https://amzn.to/37ZlHtv Disclaimer: Im a diy and not licensed. Copy at your own risk