Progressive Industries EMS-PT50X
#7 in 50 ampFull review
A proven portable EMS for 50 amp coaches that does the whole job without an app. A good pick for owners who want full protection for about $200.
Camping World $199.99$199.99
The Progressive Industries EMS-PT50X is the better RV surge protector overall, rated 3.5 to 3.4. The Progressive Industries EMS-PT50X leads on protection and monitoring. The Southwire Surge Guard 44270 wins on price. The Southwire Surge Guard 44270 costs $117.46 less ($82.53 vs $199.99).
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 Progressive Industries EMS-PT50X for protection (high and low voltage cutoff, miswiring detection, restart delay vs surge only) and monitoring (volts and amps display vs indicator lights only).
- Choose the Southwire Surge Guard 44270 for price ($82.53 vs $199.99).
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 | Progressive Industries EMS-PT50X | Southwire Surge Guard 44270 |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Protection 35% | 85 high and low voltage cutoff, miswiring detection, restart delay | 0 surge only |
| Surge rating 10% | 93 3,580 joules | 100 4,200 joules |
| Monitoring 10% | 50 volts and amps display | 0 indicator lights only |
| Price 20% | 66 $199.99 | 100 $82.53 |
| Warranty 25% | 0 warranty not published, scored as none | 100 lifetime warranty |
Specifications
| Progressive Industries EMS-PT50X | Southwire Surge Guard 44270 | |
|---|---|---|
| Protection | ||
| Service | 50 A | 50 A |
| Type | EMS | Surge only |
| Surge rating | 3,580 J | 4,200 J |
| Miswiring detection | Yes | No |
| Restart delay | Yes | No |
| Build | ||
| Mount | Portable | Portable |
| Display | Yes | No |
| App | No | No |
| Weatherproof | Yes | - |
| Lock | Yes | No |
| Warranty | - | Lifetime |
| Released | 2017-08-23 | - |