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 is the better RV surge protector overall, rated 3.4 to 2.4. The Southwire Surge Guard 44270 leads on surge rating. The Progressive Industries SSP-50XL costs $8.35 less ($74.18 vs $82.53).
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 44270 for surge rating (4,200 joules vs 1,650 joules).
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 | Progressive Industries SSP-50XL |
|---|---|---|
| Overall rating | 3.4/5 | 2.4/5 |
| Protection 35% | 0 surge only | 0 surge only |
| Surge rating 10% | 100 4,200 joules | 45 1,650 joules |
| Monitoring 10% | 0 indicator lights only | 0 indicator lights only |
| Price 20% | 100 $82.53 | 100 $74.18 |
| Warranty 25% | 100 lifetime warranty | 0 warranty not published, scored as none |
Specifications
| Southwire Surge Guard 44270 | Progressive Industries SSP-50XL | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | Surge only | Surge only |
| Surge rating | 4,200 J | 1,650 J |
| Miswiring detection | No | - |
| Restart delay | No | - |
| Build | ||
| Mount | Portable | Portable |
| Display | No | No |
| App | No | No |
| Weatherproof | - | Yes |
| Lock | No | - |
| Warranty | Lifetime | - |
| Released | - | 2016-07-20 |