I am also in NH and have a backup generator for critical circuits, but I am researching a scalable, off-grid PV system for our home.
Starting with feeding our garden, chicken and duck house and our sunroom. Later on, expand to critical circuits like well pump, furnace, freezer and refrigerator and selected lighting.
We had a company drop out of the blue a year ago and tried to scam us with a grid tied monster way out of our price range and no battery backup. You have to watch out for these scam artists.
I was thinking about building an array but I can’t convince my wife.
There are several YouTube videos out where people build a south facing array.
It is no different than building any other type of deck or small barn structure.
Then rent a ditch witch or small excavator to run the line to the house.
Then hire an electrician to hook it up.