Review on 50 Amp Hughes Autoformers PWD50-EPO Power Watchdog Portable RV Auto Shutoff Smart Bluetooth Electrical Surge Protector by Paul Gravely

Works great on my RV with 50A cord The only issue others have mentioned is that the Bluetooth range for the app is quite short. The app is a bit buggy as it will show warnings from time to time that you've lost power when in fact it just lost connection with the device. Keep in mind that most RV fleets have fewer surge or surge problems that most vans are designed to handle. This device also features an emergency shutdown when the voltage drops to a low level. Low voltage is a much greater threat as it occurs more frequently than surges. Especially in old RV sites. Low voltage is the cause of most hot wires, melted plugs and burnt RV electronics.