DIY hybrid water heater and air conditioner for my solar trailer project

Take standard $98 small room 5200BTU air conditioner and re-think just where all that electric energy is going. ALL AIR CONDITIONERS ARE HEAT PUMPS! Instead of extracting the heat in the air inside your house on hot summer days, and just literally throwing all that heat out the window, heat water with it and save all that energy. duh. You can also opt to buy a commercially available "hybrid water heater" now being advertised by some companies - they do the same thing.
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