The main reason you need one camping and maybe not at your house ( though I use one there too) is the amount of different locations your at. Your house stays in one spot, your camper... not so much.
You can get a simple 30 amp surge protector for $75-90 and the ems (electrical management system) for around $250-300.
- surge protector, protects from spikes and or surges
Ems- protects from spikes
- protects, and disconnects your power from high voltage
- and low voltage
- has a timer to leave power off to save your ac compressor from starting too soon
- usually has a display to show voltage and amperage used at that time
Both usually show if polarity is reversed or not (on progressive units)
We had a simple surge protector on out last $20-25k 5er, but I ordered an EMS unit for our new $40-50k 5er.
Its up to you.
Btw an ac unit is about $500+
Hot water heater $400+
Coverter about $200+
I would at least do the simple surge protector, and always check the pedestal before pluging in also.
MillerTime- Future Sabre Handler!!