I have a parallax 7100 inverter and the cooling fans run all the time . Has anyone repaired one of these units. If I know were the heat thermal unit is I have a tech guy that can repair it .
It stays on if it's hot. I would blow all the dust out of it (and check your battery too, does it need water, sides bulging?) but then, I would start looking for a better converter. That one is a single stage charger/converter that is hard on the batteries over the long haul. I destroyed a battery to learn this. A progressive Dynamics will nicely in place of that one.