Hughes Power Watchdog PWD30-EPO
#4 in 30 ampFull 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$309.99
The Hughes Power Watchdog PWD30-EPO and the Southwire Surge Guard 34931 are evenly matched, rated 4.1 and 4.1. The Hughes Power Watchdog PWD30-EPO leads on protection and surge rating. The Southwire Surge Guard 34931 wins on monitoring. The Southwire Surge Guard 34931 costs $8.87 less ($301.12 vs $309.99).
Southwire Surge Guard 34931
#5 in 30 ampFull 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$301.12
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.
Which should you buy?
- Choose the Hughes Power Watchdog PWD30-EPO for protection (high and low voltage cutoff, miswiring detection, restart delay, replaceable surge module vs high and low voltage cutoff, miswiring detection, restart delay) and surge rating (3,000 joules vs 2,450 joules).
- Choose the Southwire Surge Guard 34931 for monitoring (volts and amps display and app vs app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 30 amp RV surge protector; a clear win is highlighted. How we rank explains each one.
| Factor weight | Hughes Power Watchdog PWD30-EPO | Southwire Surge Guard 34931 |
|---|---|---|
| Overall rating | 4.1/5 | 4.1/5 |
| Protection 35% | 100 high and low voltage cutoff, miswiring detection, restart delay, replaceable surge module | 85 high and low voltage cutoff, miswiring detection, restart delay |
| Surge rating 10% | 82 3,000 joules | 70 2,450 joules |
| Monitoring 10% | 50 app | 100 volts and amps display and app |
| Price 20% | 8 $309.99 | 10 $301.12 |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Hughes Power Watchdog PWD30-EPO | Southwire Surge Guard 34931 | |
|---|---|---|
| Protection | ||
| Service | 30 A | 30 A |
| Type | EMS | EMS |
| Surge rating | 3,000 J | 2,450 J |
| Voltage cutoffs | 104 V / 132 V | 102 V / 132 V |
| Miswiring detection | Yes | Yes |
| Restart delay | Yes | Yes |
| Replaceable surge module | Yes | - |
| Build | ||
| Mount | Portable | Portable |
| Display | No | Yes |
| App | Yes | Yes |
| Weatherproof | Yes | Yes |
| Lock | - | Yes |
| Warranty | Lifetime | Lifetime |