Two things on this, how do you determine what size unit to buy and how about using a automatic transfer switch that shuts off the local commercial power to the home when the power goes off and then automatically will transfer from the generator back to the commercial power after a set amount of time when the commercial power supply comes back on like twenty or so
All the phone company service (AKA Central Offices) offices that provide dial tone had them back in the day, I have no idea about what the cellular industry does for back up power