We just bought the Progressive Industries portable EMS unit from Amazon last week after a bit of research and reading the great advice from the fellow Forum members. Haven't had a chance to use it yet. Decided to fork out for the EMS rather than just the less expensive surge protector partly because of the low voltage situations that can arise, reverse polarity, etc.
When we were camping last year (before we got our 36CKTS), a lightning strike hit in the campground we were in - I was pumping up something outside and it just came from out of nowhere and hit. I found out later that it had taken out a couple's rig and it was their very first time taking it out - had just bought it earlier that week.
It's definitely a cheap bit of insurance given the amount we pay for these rigs!
Wayne and Kim
2014 Cedar Creek 36CKTS
2011 Ford F250 King Ranch 4x2 Diesel, added springs
Nights camped: 2014 - 32; 2013 - 23