Shop Nilight 30Amp RV Surge Protector Circuit Analyzer 2100 Joules Voltage Monitor High Low Voltage Spikes Power Defender 125V/3750W ETL Listed Power Gugard for RV Camper Van Trailer, support 2 Years Warranty in high quality. Our RV surge protector has been tested at an ETL laboratory and found to meet all applicable Standards for Safety published by relevant NRTLs.