[Dennis4809]

Shore power and generator should produce the same results. A/C works off AC power but your lights and slides should be DC (battery) powered. What about other AC powered things such as a microwave and the regular 110 outlets. If those things don't work then check the generator breaker or your transfer box. If they do work, focus on the DC side. Do you have a disconnect switch? Typically located near the door. Number of batteries isn't necessarily an issue. As long as you get 12 volts, thing should work. More batteries just give you more time allowed between charges. If your mostly at campgrounds with shore power, one is fine. If you spend a got of time boon docking then you might want to add batteries.
Good luck,