Southwire Surge Guard 34951
#3 in 50 ampFull review
A thorough 50 amp EMS with a long warranty for big coaches. Worth the premium mainly for the extra neutral protection and the warranty.
Nomadic Supply $399.95$399.95
The Southwire Surge Guard 34951 is the better RV surge protector overall, rated 4.3 to 3.3. The Southwire Surge Guard 34951 leads on protection and monitoring. The Progressive Industries EMS-HW50C wins on price. The Progressive Industries EMS-HW50C costs $210.96 less ($188.99 vs $399.95).
Progressive Industries EMS-HW50C
#11 in 50 ampFull review
The standard hardwired EMS for 50 amp coaches at under $200. Best for owners who are happy to install it once and forget it.
Amazon $188.99$188.99
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 Southwire Surge Guard 34951 for protection (high and low voltage cutoff, miswiring detection, restart delay vs high and low voltage cutoff, miswiring detection) and monitoring (volts and amps display and app vs volts and amps display).
- Choose the Progressive Industries EMS-HW50C for price ($188.99 vs $399.95).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 50 amp RV surge protector; a clear win is highlighted. How we rank explains each one.
| Factor weight | Southwire Surge Guard 34951 | Progressive Industries EMS-HW50C |
|---|---|---|
| Overall rating | 4.3/5 | 3.3/5 |
| Protection 35% | 85 high and low voltage cutoff, miswiring detection, restart delay | 70 high and low voltage cutoff, miswiring detection |
| Surge rating 10% | 100 4,200 joules | 93 3,580 joules |
| Monitoring 10% | 100 volts and amps display and app | 50 volts and amps display |
| Price 20% | 21 $399.95 | 70 $188.99 |
| Warranty 25% | 100 lifetime warranty | 0 warranty not published, scored as none |
Specifications
| Southwire Surge Guard 34951 | Progressive Industries EMS-HW50C | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | EMS | EMS |
| Surge rating | 4,200 J | 3,580 J |
| Voltage cutoffs | 102 V / 132 V | - |
| Miswiring detection | Yes | Yes |
| Restart delay | Yes | - |
| Build | ||
| Mount | Portable | Hardwired |
| Display | Yes | Yes |
| App | Yes | No |
| Weatherproof | Yes | - |
| Lock | Yes | - |
| Warranty | Lifetime | - |
| Released | - | 2010-03-02 |