this is a pretty typical issue with Inverter's with 'compartment fans' installed by Thor...they don't want the inverter to get too hot, but these fans have a 'sensor' attached that seem to be more sensitive than they should be, causing the fan to run even when it's been hours and hours since the Inverter has been used on it's own...
You should be able to find the sensor in a wad of wiring between the fan and the inverter, and if you place a piece of ice on it, it will immediately stop.... : )
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada.... formerly Georgia, then NorthCarolina, now Alabama : )