Wow. You've been busy! Did you catch any of The 6 hours of Watkins Glen? You may have in intermittent short OR... What model is your converter? If it's a 30A converter, it will easily blow a 20A fuse charging a discharged battery. If it's a 30A converter, replace the fuse with a 30A fuse. There's a 30A at the battery and it's 10 gauge wire. The wiring is rated for a 30A. Even if the campground power is shoddy, it shouldn't cause problems on the 12V side of a modern converter. We can have a more thorough peek at it at the next rally if you can wait that long. Glad to have you in the Hollow. See you then.