I think you are doing a disservice calling into question surge protectors. All RV parks are not perfectly maintained and you never know when you might hit one with a bad electrical plug. In addition in many parts of the country and Canada, lightening strikes can be deadly to RV electrical systems. I had an A/C - heat system fried and a surge protector toasted over the years. I also had a boat system damaged by an electrical surge. A good surge protector is like insurance. How many insurance claims have you had and yet you still pay big bucks for insurance. A surge protector is cheap insurance.
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