Hughes Power Watchdog 30A Gen I & Gen II Surge Protector Parts Guide

A 30-amp Power Watchdog can be a basic surge-monitoring unit or a model with automatic Emergency Power Off (EPO). There are also two generations: the original Bluetooth units and newer Bluetooth/Wi-Fi models. Those differences determine both the electrical protection features and the replacement surge module. Select by the exact model number on the unit.

Parts pictured in this guide

Select an image for product details, or jump to the parts list. Match the complete model and part number before ordering.

Hughes Autoformers 30A Surge Protector – PWD30-EPO-H — Hughes Power Watchdog 30A Gen I & Gen II Surge Protector Parts GuideHughes Autoformers 30A Surge Protector – PWD30-EPO-HPart PWD30-EPO-H
Hughes Autoformers 30A Hardwired Surge Protector – PWD30EPOHW — Hughes Power Watchdog 30A Gen I & Gen II Surge Protector Parts GuideHughes Autoformers 30A Hardwired Surge Protector – PWD30EPOHWPart PWD30EPOHW
Hughes Auto Surge Protection Module - 30 Amp Power Watchdog – RSP-30-PWD — Hughes Power Watchdog 30A Gen I & Gen II Surge Protector Parts GuideHughes Auto Surge Protection Module - 30 Amp Power Watchdog – RSP-30-PWDPart RSP-30-PWD

Compare the 30-amp Power Watchdog models

Model on unit Generation / mounting EPO shuts off unsafe power? Replacement surge module
PWD30 Gen I portable, Bluetooth No — surge/fault monitoring only RSP-30-PWD
PWD30-EPO Gen I portable, Bluetooth Yes SP30PWDEPO
PWD30-EPO-H Gen I hardwired, Bluetooth Yes SP30PWDEPO
PWD30W Gen II portable, Bluetooth and Wi-Fi No — monitoring only RSM30W
PWD30EPOW Gen II portable, Bluetooth and Wi-Fi Yes RSM30W
PWD30EPOHW Gen II hardwired, Bluetooth and Wi-Fi Yes RSM30W

Select the correct 30-amp replacement module

Module part Use with Do not use with
RSP-30-PWD Gen I PWD30 (non-EPO) Gen I EPO or any Gen II Wi-Fi unit
SP30PWDEPO Gen I PWD30-EPO or PWD30-EPO-H Gen I PWD30 basic model or Gen II
RSM30W Gen II PWD30W, PWD30EPOW, PWD30EPOHW All Gen I 30A models

How a surge warning differs from emergency shutoff

The basic PWD30 and PWD30W models can show incoming-power problems and monitor electrical use, but do not disconnect the RV automatically for sustained low or high voltage. EPO models disconnect the RV when their electrical fault conditions are met and ordinarily reconnect after a 90-second safe-power delay. An exhausted surge module is a separate condition: the maker identifies E9 on EPO and Gen II displays. Do not assume every fault requires a new module.

Before ordering or replacing a part

Match both amperage and generation before purchasing a surge module. A Gen II Wi-Fi module cannot replace a Gen I Bluetooth-only board even if both are marked 30 amp. The EPO suffix means emergency shutoff; a hardwired version belongs in the RV shore-power path and should be installed by a qualified RV electrician. The Power Watchdog does not boost campground voltage.

Manufacturer documentation

Hughes 30A Gen I EPO replacement module and supported unitsHughes 30A Gen II Wi-Fi replacement module and supported unitsHughes Power Watchdog model comparisonHughes Power Watchdog troubleshooting and surge-module symptoms

Related Power Watchdog guides

See the matching products

Choose an image to open the corresponding NewRVParts product. The item number on your protector determines the correct service part.

Hughes PWD30 Power Watchdog 30A Gen I Portable Surge Protector product photographPWD30 — Power Watchdog 30A Gen I Portable Surge ProtectorBluetooth-only surge monitoring; no automatic EPO shutoffHughes PWD30-EPO Power Watchdog 30A Gen I Portable EPO product photographPWD30-EPO — Power Watchdog 30A Gen I Portable EPOBluetooth monitoring with emergency power shutoffHughes PWD30W Power Watchdog 30A Gen II Wi-Fi Portable product photographPWD30W — Power Watchdog 30A Gen II Wi-Fi PortableGen II Bluetooth/Wi-Fi monitoring, without EPOHughes PWD30EPOW Power Watchdog 30A Gen II Wi-Fi Portable EPO product photographPWD30EPOW — Power Watchdog 30A Gen II Wi-Fi Portable EPOGen II portable unit with automatic shutoffHughes SP30PWDEPO Gen I 30A EPO Replacement Surge Module product photographSP30PWDEPO — Gen I 30A EPO Replacement Surge ModuleFor Gen I 30A EPO portable and hardwiredHughes RSM30W Gen II 30A Wi-Fi Replacement Surge Module product photographRSM30W — Gen II 30A Wi-Fi Replacement Surge ModuleGen II 30A PWD30W, PWD30EPOW, PWD30EPOHW

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