I have 2 ve direct 48 volt inverters, 375 and 1200 watt. When they are idle the fans never run. When the temperature is above 55F the area near the on/off switch gets hot. I've solved this issue by placing a 60mm fan blowing into the intake vent...right by the switch. Anybody else put their hand on these, above the switch after they've been on a while...and at idle? Not in power save mode.