A few years ago we had lightning strike the power line in a campgrounds we were staying in. Quite a few RV's had their systems fried.
Thank goodness I had invested in a Progressive Industries EMS PT-50 that is for one thing a surge protector. It took the surge and it was fried BUT our RV system did not have any damage. Progressive Industries replaced the unit free of charge because they said it did what they designed it to do, protect our RV electrical system.
If you haven't already, it sounds like you should invest at the least a surge protector.
Here's a link to Progressive Industries where you can read about the products they make to protect our RV's electrical systems:
http://www.progressiveindustries.net/
I am not saying that you should buy one of their products, but I advise everyone to at least have a Surge Protector to prevent the damage that you just received from a power surge.
Ron