He said the Genset keeps running while the power cuts off. Doesn't sound like oil level to me.
rjfmail, your generator is hooked to a switch (and I can't remember what's called, but somebody on here will tell us.) What that switch does is switches the source of your AC power between shore power and generator power as you can't be getting AC power for your motorhome from both. Normally if you have shore power plugged in and you start your generator the switch will turn over to get power from the generator. When you turn the generator off it will switch back to shore power. When you only have AC power coming in from one source, whether that is shore power or generator power, that switch will change to that source. Sounds to me like there is a good chance that switch is malfunctioning.
