Originally Posted by sparky60
There are so many to choose from, and I'm not quite understanding the differences between them all.
Most will only say what they were told to believe. Or what they use as if that proves it is good. First learn what a surge is.
The word surge is subjective. So a surge can be a low current, a high voltage. a high current, a sudden power off, or a low voltage - to name a few conditions.
For homes, a most common and destructive surge is lightning. That means a current is inside hunting for earth destructively via appliances. That protection means a device must connect all wires low impedance (ie 'less than 10 feet') to earth. So that a lightning current finds earth BEFORE entering the building.
For campers, a most common and destructive surge can be low voltages or slightly high voltages. One type of protector cuts off AC power is voltage drops too low or rises too high (ie only above 130 volts). These voltage variations are mostly harmful to motorized appliances; not to electronics.
Other campsite anomalies may be reversed polarity, excessive current, or floating safety ground. Some protectors will also detect and cut off power during these anomalies. Those protectors are often mounted inside the camper.
A protector to also protect from surges such as lightning must be connected farther from electronics and close to the pole's earth ground. These types are rain proof and need a safety chain so that sticky fingers do not walk off with the protector.
Anyone who recommends a protector must first define which anomalies are a concern and which anomalies are averted by that protector. That also means numbers; not subjective claims.