So he is saving what $1,800 annually? About a 12 year break even then ... worse if you calculate in loss opportunity and/or finance charges.
“So he is saving what $1,800 annually?”
Don’t forget that even that number is politically contrived with the utility companies. If the real value of the electricity is calculated from the grid’s demand standpoint it’s very marginal.
But the utility companies are paying so that there’s an economic incentive for homeowners to install wind & solar.