Hi Badger,
When using a generator with the Oliver, it is important to have a bonding plug otherwise known as a neutral ground plug on the generator. The Oliver comes standard with a built in surge protector and if you do not have this plug, the surge protector will not allow the 120v power to work as it is not grounded. Here is an example of a ground plug that you can buy on Amazon for $19. https://www.amazon.com/Southwire-Company-LLC-44400-Generator/dp/B07F4R7BDL/ref=sr_1_5?keywords=generator+bonding+plug&qid=1696360581&sr=8-5
- Phil Andrews, Oliver Travel Trailers