Despite the hype about solar battery storage, any honest solar installer will give you the same advice:
Batteries will not pay for themselves EVER!. At the moment, a Tesla Powerwall battery system will cost you at $7,000 to $8,200 to install, and will take 10 years to pay back at best.
The unit is warranted to last 10 years. You do the maths. A solar panel system will pay for itself in seven years and one month in California, and is warranted for 25 years. You have almost a