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 2.4. The Southwire Surge Guard 34951 leads on protection, monitoring and surge rating. The Progressive Industries SSP-50XL wins on price. The Progressive Industries SSP-50XL costs $325.77 less ($74.18 vs $399.95).
Progressive Industries SSP-50XL
#13 in 50 ampFull review
A budget surge protector for 50 amp coaches when an EMS is out of reach. It guards against spikes but not against low voltage.
Amazon $74.18$74.18
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 surge only), monitoring (volts and amps display and app vs indicator lights only) and surge rating (4,200 joules vs 1,650 joules).
- Choose the Progressive Industries SSP-50XL for price ($74.18 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 SSP-50XL |
|---|---|---|
| Overall rating | 4.3/5 | 2.4/5 |
| Protection 35% | 85 high and low voltage cutoff, miswiring detection, restart delay | 0 surge only |
| Surge rating 10% | 100 4,200 joules | 45 1,650 joules |
| Monitoring 10% | 100 volts and amps display and app | 0 indicator lights only |
| Price 20% | 21 $399.95 | 100 $74.18 |
| Warranty 25% | 100 lifetime warranty | 0 warranty not published, scored as none |
Specifications
| Southwire Surge Guard 34951 | Progressive Industries SSP-50XL | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | EMS | Surge only |
| Surge rating | 4,200 J | 1,650 J |
| Voltage cutoffs | 102 V / 132 V | - |
| Miswiring detection | Yes | - |
| Restart delay | Yes | - |
| Build | ||
| Mount | Portable | Portable |
| Display | Yes | No |
| App | Yes | No |
| Weatherproof | Yes | Yes |
| Lock | Yes | - |
| Warranty | Lifetime | - |
| Released | - | 2016-07-20 |