My electrical bay compartment is outside access
I do leave it open during the day while charging in hot weather
But not in cold weather, not normally needed in early March at night
I like I said, the inverter was the load that killed the wfco
Running the heater did not hurt the inverter
Both in the same compartment (and that compartment housed the OEM Freedom 10 combo unit for many years)
Not all converters or inverters are the same quality
Of course this is PT's thread
I was only making a comment regarding my inadvertent double conversion of power
I have 'so far' avoided making that mistake a second time
Double conversion can done using two devices
But a combo unit only does one or the other
And Don did say it was charging the batteries before the failure
This conversion conversation is regarding possibilities of future use