Surge protector

kottum · March 2022

Some years ago we purchased an external surge protector, because both internal and external urge protectors are sacrificial. I understood they would be ruined in the process of surge protection in some conditions. If the external surge protector is ruined, we could simply unplug it, toss it, and continue our travels without it. If the internal surge protector is ruined, we would have no external power available until it was replaced or bypassed.

Is that still the case with the newer models?

Doug K

donmontalvo · April 2025

I just bought a EMS-HW30C that I will be installing soon. Saw this thread, thought I'd respond to help the next person. I asked their support and they explained that yes, it will sacrifice itself to protect your camper.

https://www.amazon.com/gp/product/B002UC6RSA

There is an internal bypass switch that will allow power to go through the unit, however of course there will not be any protection. For that reason I will keep my plug-in surge protector handy.

This way I can get the EMS-HW30C repaired and replaced, while bring protected by the plug-in surge protector, which won't do all that the EMS-HW30C can do, but it's some protection (better than none).

I plan to install it behind the passenger side folding back rest. Waiting for confirmation from nuCamp support on the wire spec, so I can replace the short orange wire coming from the 30A input to the WFCO with a longer one (not a fan of unnecessary splicing).

UPDATE: forgot to follow up on this. I ended up mounting it on the floor right next to the WFCO. I had to move the ground busbar over a little bit to make room (confirmed with T@B that moving it was ok. I put the display next to the two outlets, so I can see it when I open the door.

Image: https://us.v-cdn.net/5021717/uploads/editor/1p/pqrbvyi1s1jc.jpeg

Image: https://us.v-cdn.net/5021717/uploads/editor/jd/6jgn8821ri1t.jpeg

Gomers2 · April 2025

Had good luck with this inexpensive option. Auto shutoff for under and over voltage, with surge protector and voltage readout. Low frills peace of mind.

Yomile Smart RV Surge Protector, 30 Amp 10800 Joules RV Circuit Analyzer Full Protection, IP67 Waterproof RV Adapter Plug for Camper https://a.co/d/ffTMaGy

rcarlson1957 · May 2025

We use the 2 piece portable one from Progressive Industries. I like that the tester is separate from the protector module and the protector module is small and doesn't take up much space. Since protectors a sacrificial I keep an extra one in case the original one blows. https://unitedrvparts.com/products/progressive-industries-rv-surge-protector-kit-psk-30-30-amp?variant=45365692105007&utm_source=google&utm_medium=cpc&utm_campaignid=20546546876&utm_campaign=PRO_Pmax_UnitedRV_Bamboo_CVR_Purchase_Misc.&utm_adgroupid=&utm_device=c&utm_network=x&gad_source=1&gad_campaignid=22414975890&gbraid=0AAAAAqMZvfSfq8WYApUXQ7N3DnMyteDjH&gclid=EAIaIQobChMIie2ksdu0jQMV-A9ECB1eeQlCEAQYBiABEgI4QvD_BwE

Surge protector

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