How To Electrical Issue

[heritagebiker658]

I have a 2003 Country Coach, Islander. I have an electrical issue that is bothering me. When the generator runs for 1/2 hour to 45 minutes the electrical shuts down to the house ac units, outlets and the house lights. And that's what I have found out so far. Also, when this event happens the generator keeps running and doesn't shut down. There's an fuse panel in the inverter compartment with no power to a portion of it. Where the power connects to the panel is a small message that reads, (CB2 reset lever located below generator and jack). When I look in the location for this CB2, I cannot find anything that resembles a Circuit Breaker. There's 12 volt power at this location. When I jump the circuit out with jumper cables all is fine and eventually the wherever CB2 is it resets itself.
Hoping someone might be able to shed some light on this and direct me to the culprit. Thanks for any and all help.