Do you have an inverter/charger OR a converter/charger.
That 05 Cougar.......is that trailer 50A or 30A? (the 1995 Sportsman was 30A?)
I suspect you have a converter/charger.
Turn the 110V AC circuit breaker OFF that powers that converter (or un plug from outlet if it isn't hardwired to a CB)
Then fire off generator.......if it runs OK then problem is with converter OR those batteries
You can test converter by disconnecting battery cables......fire up generator....turn converter ON (110V AC circuit breaker ON or plugged back in)... If generator runs OK and converter output is 13.6V DC then batteries are problem
Have batteries load tested.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31