Joe Oden from All Seasons RV explains why you should use a surge protector. RV appliances and electrical systems require a consistent level of voltage to operate safely and effectively. Sometimes that doesn’t happen, like when you plug into a defective RV park pedestal, get hit during a lightening storm or downed power lines affect electricity going into your campground. When voltage drops too low or swings too high, your RV appliances, computers, TVs and more can be severely damaged.