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 3.4. The Southwire Surge Guard 34951 leads on protection and monitoring. The Southwire Surge Guard 44270 wins on price. The Southwire Surge Guard 44270 costs $317.42 less ($82.53 vs $399.95).
Southwire Surge Guard 44270
#9 in 50 ampFull review
The best surge rating per dollar among 50 amp protectors here. A good choice when the budget won’t stretch to an EMS.
Amazon $82.53$82.53
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) and monitoring (volts and amps display and app vs indicator lights only).
- Choose the Southwire Surge Guard 44270 for price ($82.53 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 | Southwire Surge Guard 44270 |
|---|---|---|
| Overall rating | 4.3/5 | 3.4/5 |
| Protection 35% | 85 high and low voltage cutoff, miswiring detection, restart delay | 0 surge only |
| Surge rating 10% | 100 4,200 joules | 100 4,200 joules |
| Monitoring 10% | 100 volts and amps display and app | 0 indicator lights only |
| Price 20% | 21 $399.95 | 100 $82.53 |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Southwire Surge Guard 34951 | Southwire Surge Guard 44270 | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | EMS | Surge only |
| Surge rating | 4,200 J | 4,200 J |
| Voltage cutoffs | 102 V / 132 V | - |
| Miswiring detection | Yes | No |
| Restart delay | Yes | No |
| Build | ||
| Mount | Portable | Portable |
| Display | Yes | No |
| App | Yes | No |
| Weatherproof | Yes | - |
| Lock | Yes | No |
| Warranty | Lifetime | Lifetime |