A 30 amp protector fits the three-prong TT-30 plug on most travel trailers, smaller fifth wheels and Class C motorhomes. One air conditioner and a microwave can use most of a 30 amp supply, so a 30 amp RV is quick to pull a weak pedestal’s voltage down, and an EMS that cuts power on low voltage earns its higher price here.
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Full ranking 14
- Hughes Power Watchdog PWD30-EPO-H#1 of 14Full review
A hardwired EMS with phone monitoring for 30 amp RVs. A good buy while it sells for less than the Gen II version.
Amazon $226.34$226.34EMS3,000 JHardwired - Southwire Surge Guard 35530#2 of 14Full review
A hardwired 30 amp EMS with a lifetime warranty for about $150. For trailer owners who want theft proof protection.
Amazon $154.97$154.97EMS2,450 JHardwired - Progressive Industries EMS-PT30X#3 of 14Full review
A full EMS for 30 amp trailers at a moderate price, backed by a lifetime warranty. Good for anyone who camps at older parks with shaky voltage.
Amazon $135.88$135.88EMS1,790 JPortable - Hughes Power Watchdog PWD30-EPO#4 of 14Full review
A full EMS with phone monitoring and a replaceable module for 30 amp RVs. Strong value when it sells below the Gen II price.
Amazon $309.99$309.99EMS3,000 JPortable - Southwire Surge Guard 34931#5 of 14Full review
A complete 30 amp EMS with an app and the best warranty terms here. For owners who want everything and don’t mind the price.
Amazon $301.12$301.12EMS2,450 JPortable - Hughes Power Watchdog PWD30EPOHW#6 of 14Full review
A connected hardwired EMS for 30 amp RVs that you can monitor and switch from anywhere. For owners who want theft proof protection with remote control.
Amazon $280$280EMS-Hardwired - Hughes Power Watchdog PWD30EPOW#7 of 14Full review
The most connected portable EMS for 30 amp RVs, with remote shutoff and a replaceable module. For owners who leave the RV plugged in while away.
Amazon $309.99$309.99EMS-Portable - Hughes Power Watchdog PWD30#8 of 14Full review
A surge protector with phone monitoring and a replaceable module for 30 amp RVs. It suits owners who want to watch park power but don’t need automatic shutoff.
Amazon $139.99$139.99Surge only3,000 JPortable - Southwire Surge Guard 44260#9 of 14Full review
A simple surge protector with a strong warranty for 30 amp trailers. It warns of problems but leaves the decision to you.
Camping World $85.63$85.63Surge only2,100 JPortable - Hughes Power Watchdog PWD30W#10 of 14Full review
A connected surge protector for 30 amp RVs that you can watch from anywhere. Buy the auto shutoff version if you want an EMS.
Amazon $169.99$169.99Surge only-Portable - Southwire Surge Guard 44280#11 of 14Full review
A well built surge protector for 30 amp trailers with extra diagnostics and a lifetime warranty. Pick an EMS instead if you camp where voltage sags.
Amazon $97.69$97.69Surge only2,100 JPortable - Progressive Industries EMS-HW30C#12 of 14Full review
A long running hardwired EMS for 30 amp trailers. For owners who want protection that is always connected and can’t walk off the pedestal.
Amazon $151.31$151.31EMS1,790 JHardwired - Camco Power Grip 30A Circuit Analyzer#13 of 14Full review
A basic surge and wiring check built into a short 30 amp cord. Fine for occasional campers on a tight budget.
Amazon $54.99$54.99Surge only1,050 JPortable - Progressive Industries SSP-30XL#14 of 14Full review
A low cost surge protector for 30 amp trailers that camp at well kept parks. Owners who face unreliable power should spend more on an EMS.
Amazon $51.55$51.55Surge only825 JPortable
