Hughes Power Watchdog PWD30-EPO-H
#1 in 30 ampFull 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$226.34
The Hughes Power Watchdog PWD30-EPO-H and the Southwire Surge Guard 35530 are evenly matched, rated 4.3 and 4.2. The Hughes Power Watchdog PWD30-EPO-H leads on protection and surge rating. The Southwire Surge Guard 35530 wins on price. The Southwire Surge Guard 35530 costs $71.37 less ($154.97 vs $226.34).
Southwire Surge Guard 35530
#2 in 30 ampFull review
A hardwired 30 amp EMS with a lifetime warranty for about $150. For trailer owners who want theft proof protection.
Amazon $154.97$154.97
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-H 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 35530 for price ($154.97 vs $226.34).
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-H | Southwire Surge Guard 35530 |
|---|---|---|
| Overall rating | 4.3/5 | 4.2/5 |
| 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 | 50 volts and amps display |
| Price 20% | 30 $226.34 | 55 $154.97 |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Hughes Power Watchdog PWD30-EPO-H | Southwire Surge Guard 35530 | |
|---|---|---|
| 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 | Hardwired | Hardwired |
| Display | No | Yes |
| App | Yes | No |
| Warranty | Lifetime | Lifetime |