Hi ! Welcome to IRV2! We're sure glad you joined the gang!
I highly recommend the Progressive Industries EMS series protectors. For 50A that would be the PT50X or the HW50C, depending on whether you want hardwired or portable. They protect you against any electrical problem, not just surges. They have a lifetime warranty. You will pay $250-$350, but it will be the best money you have every spent!
Good luck, happy trails, and God bless!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD