Think about it. We boaters are trying to climatically control an environment with NO insulation and with constant exposure to harsh elements - salt, moisture, vibration, etc. Automobiles have the engine-driven compressor to cool off, hence the air conditioner runs only when the car does. Yes, we can do that on a boat but what about running the air conditioner while the engine is off? Our goal at Archer Power Solutions is not to get an internal temperature to a chilly 62 degrees in the cabin on a hot day, but to cool it enough to be comfortable below deck, take the humidity out and sleep well at night.