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
4.1/5
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.
- EMSType
- 2,450 JSurge rating
- PortableMount
- LifetimeWarranty
Check price at Amazon$301.12
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cuts power below 102 V or above 132 V and on miswiring
- LCD shows volts and amps, and the app shows them on your phone
- Lifetime warranty that also covers connected equipment
- Also guards against an overheating plug and elevated ground current
Cons
- Costs about twice as much as other 30 amp EMS units
- No replaceable surge module mentioned, so a big strike may mean a new unit
The Southwire Surge Guard Bluetooth EMS family
Every Southwire Surge Guard Bluetooth EMS model we rank, smallest first. Ratings compare each against its own service.
| Model | Type | Rating | Price |
|---|---|---|---|
| Southwire Surge Guard 34931 (this one) | EMS | 4.1/5 | $301.12 |
| Southwire Surge Guard 34951 | EMS | 4.3/5 | $399.95 |
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 | 34931 |
|---|---|
| Protection | |
| Service | 30 A |
| Type | EMS |
| Surge rating | 2,450 J |
| Voltage cutoffs | 102 V / 132 V |
| Miswiring detection | Yes |
| Restart delay | Yes |
| Build | |
| Mount | Portable |
| Display | Yes |
| App | Yes |
| Weatherproof | Yes |
| Lock | Yes |
| Warranty | Lifetime |
Alternatives in this service
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
Hughes Power Watchdog PWD30EPOHW
#6 in 30 ampFull review
A connected hardwired EMS for 30 amp RVs that you can monitor and switch from anywhere. For owners who want theft proof protection with remote control.
Amazon $280$280
Compare
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