This is the most important item after buying a motorhome. In March 2018 I installed my new Heartland 38 inch (30 amp). After traveling the US (West Coast - East Coast), Canada and Alaska for two years, I have had countless issues connecting to RV Park services, each of which would have blown my inverter/converter if not protected by this device would. If there is an "external" connection/cable/power problem, this device will detect it and shut down. In most cases, RV Park can move you to another location or fix the problem in just minutes - that's certainly better than having your electronics fail that takes weeks to fix. I can't tell you how many different problems I've seen, even at the best RV parks - I always watch them get fixed (I have over 30 years of experience) Yes this model fits in a van hence it is very hard to steal - love it. To install this you will need an electrician or one very experienced in electrical connections (behind entry doors, closets or wall panels).
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