Damon electrical issue

I was bringing in the living room slide the other night, when it quit moving and the lights went out in the coach. Checked the shore power, it was on, switched to batteries and was able to get the slide in...also had lights. Now, no power to the house batteries and the 12 volt lighting won't work on shore power alone...on battery just fine. Checked the output from the inverter - normal, fuses on the inverter OK. So, no power to charge the house batteries and 12 volt lighting that only works on battery power.
What else should I check?

Thanks!

2002 Damon Challenger 348