Originally Posted by howie70
So the Progressive Industries unit that is so wildly popular here offers no protection from lightning in the hardwired version?
Progressive is popular because it addresses other common and problematic anomalies. Such a slightly too high or too low voltage.
Surge protection from lightning (and equivalent transients) means specifications say where hundreds of thousands of joules harmlessly dissipate. This number does not only apply to camper protectors. This number also applies to those near zero power strips so many use throughout the house. Near zero is why those protectors also have a history of creating fires. And why a third (completely different) protector is needed for homes.
Another anomaly, for example, is reverse polarity. That causes no damage to any appliance. But reverse polarity means a decrease in human safety. Again, even feature may or may not be in completely different devices - all called surge protectors.