Inverters NEED fresh cooling air. Fresh INCOMING and a way to exhaust the Hot air. Failure to do this will decrease the life of the Inverter. This is one reason most RV makers install the Inverter's in the lower LARGE storage compartments. With a larger volume of space there is more fresh air to help keep the Inverter cool. What I do is, install small 4 inch 120 volt cooling fans connected to the OUTPUT side of the Inverter. Cut the appropriate in and out holes in the surrounding cabinet area. The reason for the output side is when INVERTING, those fans come on to dissipate the heat. When connected to shore the fans then run. If you have the time and energy, you can install Temp switch's instead of wiring direct to the output side. Then the fans only come on when the heat builds up. Doug