Smart plug for an RV: the 30 A and 50 A units that actually cut power

Updated 2026-11-10 · Pick: Hughes Power Watchdog Gen II 30A Wi-Fi EPO (PWD30EPOW) · Dealectric link: Kasa Outdoor Smart Plug EP40, $18.99 on Amazon (checked 2026-11-12), buy on Amazon: https://www.amazon.com/dp/B091FXH2FR?tag=dealectric-20

Short answer. For RV shore power, use a 30 amp or 50 amp smart surge protector, not a 15 A smart plug. The Hughes Power Watchdog Gen II 30A EPO (PWD30EPOW) cuts power below 104 V or above 132 V and switches remotely by Wi-Fi or Bluetooth. Listings for the non-EPO Gen II disagree on whether it disconnects, and none gives trip voltages.

Searched as: RV smart shore power plug 30A 50A remote monitoring smart surge protector 2026

How this table was made: each figure comes from the maker's own US product page or manual, or from the reviewer named next to it, checked 2026-11-10. Dealectric does not test units itself. Rows with a Buy link are products Dealectric lists: the links are affiliate links, and their codes are re-tested in the brand's own cart every day (last check 2026-11-13).

What the differences mean

• EPO costs about $90 extra. At the same store, 30 A: $279.99 (PWD30EPOW) − $189.95 (PWD30W) = $90.04. 50 A: $338.99 (PWD50EPOW) − $249.99 (PWD50W) = $89.00.
• A 30 A RV service is 3,600 W: 30 A × 120 V = 3,600 W, the maximum load RV Upgrade Store lists for the PWD30EPOW.
• A 15 A smart plug carries about half of that: 1,875 W ÷ 3,600 W = 52%. On the Kasa EP40, that 15 A is shared by both outlets.
• Low-voltage trip point: Hughes EPO trips at 104 V and Southwire Surge Guard 34931 at 102 V. 104 − 102 = 2 V, so the Hughes cuts out slightly earlier in a brownout.

Your setup	Fits
30 A RV; you want it to disconnect by itself and switch it from your phone	Hughes PWD30EPOW
50 A RV, same needs	Hughes PWD50EPOW
Lamp, fan or small dehumidifier inside the RV, no hub	Kasa EP40
RV that already runs a Z-Wave hub (Hubitat, SmartThings)	Minoston MP22Z

Alert-only or auto-shutoff: the part that protects the RV

The Gen II Power Watchdog comes with or without EPO (Emergency Power Off). On a fault, Camping World says the non-EPO PWD30W "turns red and displays the specific error code" and sends a phone alert. Its listing never says it disconnects power. Electric Motor Warehouse says its app can dim or turn off the bay light, and lists no power on/off. RV Upgrade Store's PWD30W listing does say it "cuts power to your rig the instant a hazardous condition is detected", but it gives no trip voltages. The EPO listing is specific: "power is immediately cut to your coach when a fault is detected" below 104 V or above 132 V. Power comes back once conditions stay stable for 90 seconds, and you can cut or restore it remotely.

Both 30 A units take the same replaceable surge module. Camping World sells the RSM30W ($39.99) "for use only with the PWD30EPOW, PWD30EPOHW, and PWD30W". So the extra money for EPO does not buy more surge capacity (RV Upgrade Store lists 2,300 J for the PWD30EPOW). A published disconnect matters if you leave the RV running unattended, because a phone alert does nothing for the A/C compressor while voltage stays low. Mike Sokol (RVelectricity, 12 Oct 2026) describes EMS-type protectors disconnecting above about 128 V or below about 105 V. The EPO models list trip points of 104 V and 132 V. The PWD30W listings give none.

On site, the Power Watchdog app connects over Bluetooth with no internet, according to the maker's App Store release notes. Control from away needs the unit joined to a Wi-Fi hotspot. Inside the coach, buy on Amazon: https://www.amazon.com/dp/B091FXH2FR?tag=dealectric-20 handles single appliances over 2.4 GHz Wi-Fi without a hub. If your RV already has a Z-Wave controller, $26.35: https://dealectric.com/go/minoston-mp22z-z-wave-800-outdoor-plug does the same job on Z-Wave at the same 15 A / 1,875 W rating.

Not recommended

The Gen II 30A PWD30W, if you want a known cutoff. Its listings disagree on whether it disconnects: Camping World describes only an alert, while RV Upgrade Store says it cuts power. None gives trip voltages. For about $90 more, the PWD30EPOW is listed to cut power at 104 V and 132 V. Any household smart plug between the pedestal and the RV: a 15 A plug covers 52% of a 30 A service, and the Kasa EP40 is rated for no more than a 1/2 HP motor.

Sources

• PWD30EPOW price $279.99 (list $379.99), 30 A / 3,600 W, 2,300 J, shutoff at 104 V and 132 V — www.rvupgradestore.com
• PWD30W $189.95 at RV Upgrade Store; listing says it cuts power when a hazardous condition is detected, no trip voltages — www.rvupgradestore.com
• PWD50EPOW $338.99 at RV Upgrade Store, 50 A, shutoff at 104 V and 132 V — www.rvupgradestore.com
• PWD50W $249.99 at RV Upgrade Store — www.rvupgradestore.com
• EPO cuts power on a fault, below 104 V / above 132 V, back on after 90 s, remote cut or restore — www.campingworld.com
• PWD30W turns red, shows an error code and alerts; no shutoff described — www.campingworld.com
• PWD30W app controls live data and the bay light; no power on/off described — electricmotorwarehouse.com
• RSM30W surge module ($39.99) fits PWD30EPOW, PWD30EPOHW and PWD30W — www.campingworld.com
• PWD50EPOW: 50 A, shuts off below 104 V or above 132 V, back on after 90 s, Wi-Fi + Bluetooth — www.explosivepowersports.com
• Gen II comes in 30 A and 50 A, with or without EPO; with Wi-Fi, users can remotely cut and restore RV power — rv-pro.com
• Power Watchdog app connects over Bluetooth without internet — apps.apple.com
• Kasa EP40: 15 A / 1,875 W in total, 1/2 HP, 2.4 GHz Wi-Fi only, GFCI outdoors, IP64 — www.kasasmart.com
• Minoston MP22Z: $26.35, 15 A / 1,875 W, IP65, needs a Z-Wave hub — www.minoston.com
• Southwire Surge Guard 34931 low (<102 V) / high (>132 V) voltage protection — www.southwire.com
• Mike Sokol on EMS protectors disconnecting above about 128 V or below about 105 V — rvelectricity.substack.com

Published 2026-11-10; updated 2026-11-10. The buy links are affiliate links; see the disclosure. Corrections welcome at [email protected] or /feedback.