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
4.1/5
A full EMS with phone monitoring and a replaceable module for 30 amp RVs. Strong value when it sells below the Gen II price.
- EMSType
- 3,000 JSurge rating
- PortableMount
- LifetimeWarranty
Check price at Amazon$309.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Newer model: the Hughes Power Watchdog PWD30EPOW replaces this one (rated 4.0, #7 30 amp). See every Hughes Power Watchdog Gen II generation.
Pros
- Cuts power below 104 V or above 132 V and on wiring faults, then restores it after 90 seconds
- 3,000 joules with a replaceable surge module
- Phone app shows live volts and amps and logs faults
- Limited lifetime warranty
Cons
- Costs more than a Progressive EMS with similar protection
- Replaced by the Gen II model with Wi-Fi
The Hughes Power Watchdog family
Every Hughes Power Watchdog model we rank, smallest first. Ratings compare each against its own service.
| Model | Type | Rating | Price |
|---|---|---|---|
| Hughes Power Watchdog PWD30 | Surge only | 3.5/5 | $139.99 |
| Hughes Power Watchdog PWD30-EPO (this one) | EMS | 4.1/5 | $309.99 |
| Hughes Power Watchdog PWD30-EPO-H | EMS | 4.3/5 | $226.34 |
| Hughes Power Watchdog PWD50 | Surge only | 3.5/5 | $219.99 |
| Hughes Power Watchdog PWD50-EPO | EMS | 4.3/5 | $339.99 |
| Hughes Power Watchdog PWD50-EPO-H | EMS | 4.4/5 | $329.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its service. How we rank explains each one.
Specifications
| Model number | PWD30-EPO |
|---|---|
| Protection | |
| Service | 30 A |
| Type | EMS |
| Surge rating | 3,000 J |
| Voltage cutoffs | 104 V / 132 V |
| Miswiring detection | Yes |
| Restart delay | Yes |
| Replaceable surge module | Yes |
| Build | |
| Mount | Portable |
| Display | No |
| App | Yes |
| Weatherproof | Yes |
| Warranty | Lifetime |
Alternatives in this service
Progressive Industries EMS-PT30X
#3 in 30 ampFull review
A full EMS for 30 amp trailers at a moderate price, backed by a lifetime warranty. Good for anyone who camps at older parks with shaky voltage.
Amazon $135.88$135.88
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
Compare
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