All campers should have some form of surge protection. When we purchased our Airstream I also bought a a TRC Technology Research 44750 (reviewed here https://youtu.be/NVibRIDj2y8 ) then I upgraded to a Progressive Industries SSP30 (reviewed here https://youtu.be/UBogC8pRlUM) and now I finally spent ALL of my allowance on the top of the line Progressive Industries EMS-PT30X. Here is a quick summary of the differences:
- Hi/Low voltage shutdown protection – TRC and the SSP30 do not have but the PT30X does
- Open Neutral – TRC has nothing, SSP30 has indication, PT30X shuts down
- Reverse Polarity – TRC has nothing, SSP30 has indication, PT30X shuts down
- Ground Fault – SSP30 has indication, TRC and PT30X shuts down
- AC Frequency Shutdown – TRC and SSP30 nothing, PT30X has it
- Thermal Protection – TRC nothing, SSP30 and PT30X shuts down
- 220 Volt Shutdown – TRC and SSP30 nothing, PT30X has it
- Mis-wired Pedestal – TRC has nothing, SSP30 has indication, PT30X shuts down
- Surge Indication – TRC nothing, SSP30 and PT30X have it
- PT30X only one with cover for connection
- PT30X only one with time delay restart after outage
- PT30X only one with previous error indication
- Max Spike (amps) – TRC = 1,250, SSP30 = 22,500, PT30X = 44,000
- Surge (joules) – TRC = 510, SSP30 = 825, PT30X = 1,790
TRC Model 44750 – https://amzn.to/2BrAGf7
Progressive Industries SSP30 – https://amzn.to/2S4sWqt
Progressive Industries EMS-PT30X – https://amzn.to/2EEBNMB