Hmmm. I always wondered about adding something like this. We have a main 200amp (I believe) breaker panel in the garage that has another 100amp panel off of that that goes to the basement.
I see that there are some add-on modules at places like Home Depot for not a whole lot of cash, but can it really be that easy (and cheap) to add it? I am not afraid to go into my electrical box. I did so when replacing all of the breakers and running all of the electrical wiring for the basement. (Don't confuse not being afraid with not respecting the awesome power of electricity.)
Eaton Complete Home Surge Protection 
