The 2260
XP2260 - Schumacher Electric doesn't provide an amp hour rating - just cranking amps - which doesn't help this application...
It does have a 400w inverter - so can easily handle 100w fan - fo how long you will need to see...
The power pack also has 12v outlets - so a 12v fan or two could be an option as well... or could just run them off the coach batteries which should have far more capacity...
I have two of the 'windshield sized' fans mounted in the RV - on in kitchen and one in bedroom - they move a lot of air...
We run at least one at night when boondocking with no issues... Can do a 3 day weekend without the genny (unless the microwave is needed briefly...)