As previously mentioned, the term “surge protector” is not 100 percent accurate. This term describes devices that protect against high electrical surges. While this is important, most RV surge protectors also have a built-in Electrical Management System, or EMS. An EMS detects wire and voltage issues that can lead to other significant problems. Both of these functionalities are important for your RV. Since RVs get their power from multiple sources, there is a high chance of error, and having a layer of protection is strongly recommended.