FYI, huge difference in the amount of protection provided by a
simple surge protector like these that typically cost less $150 (
Simple Surge Protection #1,
Simple Surge Protection #2)
vs.
one of these that typically cost more than $250 (
Full Protection #1,
Full Protection #2)
Although many simple surge protectors for RV's offer additional protection from faulty wiring (open ground/neutral, etc.), outside of that they offer little more protection then a simple $10 surge protector at Wal-Mart.
IMO, Progressive Industries is THE one to buy. Made in the USA and a lifetime warranty!