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
3.3/5
A connected surge protector for 50 amp RVs that you can watch from anywhere. Buy the auto shutoff version if you want an EMS.
- Surge onlyType
- PortableMount
- LifetimeWarranty
Check price at Amazon$249.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Older model: this replaces the Hughes Power Watchdog PWD50 (rated 3.5). See every Hughes Power Watchdog Gen II generation.
Pros
- Wi-Fi and Bluetooth let you check park power and get fault alerts from anywhere
- Replaceable surge module after a big strike
- Lockable, lit clamshell bay keeps the plug dry and hard to tamper with
- Energy meter shows what a metered site will cost
Cons
- Only warns of low voltage and miswiring; it doesn’t cut power
- No published joule rating
The Hughes Power Watchdog Gen II family
Every Hughes Power Watchdog Gen II model we rank, smallest first. Ratings compare each against its own service.
| Model | Type | Rating | Price |
|---|---|---|---|
| Hughes Power Watchdog PWD30W | Surge only | 3.3/5 | $169.99 |
| Hughes Power Watchdog PWD50W (this one) | Surge only | 3.3/5 | $249.99 |
| Hughes Power Watchdog PWD30EPOW | EMS | 4.0/5 | $309.99 |
| Hughes Power Watchdog PWD50EPOW | EMS | 4.1/5 | $399.99 |
| Hughes Power Watchdog PWD30EPOHW | EMS | 4.1/5 | $280 |
| Hughes Power Watchdog PWD50EPOHW | EMS | 4.1/5 | $399.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its service. How we rank explains each one.
Specifications
| Model number | PWD50W |
|---|---|
| Protection | |
| Service | 50 A |
| Type | Surge only |
| Miswiring detection | No |
| Restart delay | No |
| Replaceable surge module | Yes |
| Build | |
| Mount | Portable |
| Display | No |
| App | Yes |
| Weatherproof | Yes |
| Lock | Yes |
| Warranty | Lifetime |
| Released | 2025-02-01 |
Alternatives in this service
Progressive Industries EMS-HW50C
#11 in 50 ampFull review
The standard hardwired EMS for 50 amp coaches at under $200. Best for owners who are happy to install it once and forget it.
Amazon $188.99$188.99
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
Compare
Compare the Hughes Power Watchdog PWD50W with any other RV surge protector →
More from Hughes Autoformers: every Hughes Autoformers product ranked.