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 $199.99The Progressive Industries EMS-PT50X rates 3.5 among 50 amp RV surge protectors; the Hughes Power Watchdog PWD30 rates 3.5 among 30 amp ones. The Hughes Power Watchdog PWD30 costs $60 less ($139.99 vs $199.99).

A surge protector with phone monitoring and a replaceable module for 30 amp RVs. It suits owners who want to watch park power but don’t need automatic shutoff.
Amazon $139.99Prices 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
These two sit in different service classes (50 amp and 30 amp), and each is scored against the reference points for its own class, so a rating says how well each does among its own service peers. How we rank explains each factor.
| Factor weight | Progressive Industries EMS-PT50X | Hughes Power Watchdog PWD30 |
|---|---|---|
| Overall rating | 3.5/5 | 3.5/5 |
| Protection 35% | 85 high and low voltage cutoff, miswiring detection, restart delay | 15 replaceable surge module |
| Surge rating 10% | 93 3,580 joules | 82 3,000 joules |
| Monitoring 10% | 50 volts and amps display | 50 app |
| Price 20% | 66 $199.99 | 62 $139.99 |
| Warranty 25% | 0 warranty not published, scored as none | 100 lifetime warranty |
Specifications
| Progressive Industries EMS-PT50X | Hughes Power Watchdog PWD30 | |
|---|---|---|
| Protection | ||
| Service | 50 A | 30 A |
| Type | EMS | Surge only |
| Surge rating | 3,580 J | 3,000 J |
| Miswiring detection | Yes | No |
| Restart delay | Yes | No |
| Replaceable surge module | - | Yes |
| Build | ||
| Mount | Portable | Portable |
| Display | Yes | No |
| App | No | Yes |
| Weatherproof | Yes | Yes |
| Lock | Yes | - |
| Warranty | - | Lifetime |
| Released | 2017-08-23 | 2018-01-16 |