Just so everyone understands if U have multiple sub panels you can’t protect the main panel and that in turn protects the sub panel or panels. U only protect equipment on that sub panel and work ur way backwards towards main panel at home. So example. I have a sub panel at my pool house. So I will protect thst. I also have 3 other sub panels in my home. (Theatre,2nd floor, basement). The main panel does my first floor. So if I have a surge on the main panel only the first floor is protected. No other sub panel is protected.
I know a lot of you guys here know that but figured for someone who might not know and has multiple panels might think they can protect the main and then all subs off of it is also protected.
Just figured I would throw that out there. Deff a good, on the cheap side, idea for some protection.