Keep blowing battery solenoid
I have a 2017 Thor Vegas. When I picked it up from the prior owner in December of last year he had to replace the battery solenoid after he installed the aux. batteries, the batteries would not stay in "Store" mode. He took it to the RV place and they replaced the solenoid and all was good. I took out in May and it was working fine until I plugged into Campground power (with a surge protector). The batteries would not switch to "USE" mode after that and had to drive home without the cameras or anything else coach electrical. The RV place replaced the same solenoid again, part # 0121230. They had no idea why it blew again.
I have to take another trip next week and am leery about plugging in to campground power.
Anybody have a similar problem?