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
The Southwire Surge Guard 44270 and the Southwire Surge Guard 44290 are evenly matched, rated 3.4 and 3.4. The Southwire Surge Guard 44290 costs $4.54 less ($77.99 vs $82.53).
Southwire Surge Guard 44290
#10 in 50 ampFull review
A high capacity 50 amp surge protector with more diagnostics than its price suggests. For coaches that don’t need voltage cutoff.
Amazon $77.99$77.99
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.
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 44270 | Southwire Surge Guard 44290 |
|---|---|---|
| Overall rating | 3.4/5 | 3.4/5 |
| Protection 35% | 0 surge only | 0 surge only |
| Surge rating 10% | 100 4,200 joules | 100 4,200 joules |
| Monitoring 10% | 0 indicator lights only | 0 indicator lights only |
| Price 20% | 100 $82.53 | 100 $77.99 |
| Warranty 25% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Southwire Surge Guard 44270 | Southwire Surge Guard 44290 | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | Surge only | Surge only |
| Surge rating | 4,200 J | 4,200 J |
| Miswiring detection | No | - |
| Restart delay | No | - |
| Build | ||
| Mount | Portable | Portable |
| Display | No | No |
| App | No | No |
| Lock | No | Yes |
| Warranty | Lifetime | Lifetime |