RV Surge Protectors
The best surge protector is not a surge protector but and EMS (energy management system) box amd the cream of the crop is the Progressive Industries. They come in 2-flavors, a plug in at the pedestal style & hard wire unit that resides in your RV, for both 30 Amp & 50 Amp. The difference between a surge protector and an EMS, is the surge protector typically only protect against a large surge in current, a good thing for sure, while an EMS does that and also will shut down power to your rig if their is a fault or if power available falls below a certain threshold. My preference is for the hard wired, as it is one less thing to loose or have to deal with.