Well, this should be fun. And that should give you a notion of how warped my idea of "fun" is these days. It's a new (well, factory-reconditioned) power converter for the Beast. This is what takes 110V AC from the generator or external power and converts it to 12V DC for all the lights, etc. And charges the battery. Smaller, lighter, and smarter.
It's being shipped to me. We'll see how installation goes. If this works, I will be feeling extremely smug about figuring this out and dealing with it without paying one of the repair shops.