On Tuesday, December 31, 2019 at 12:05:03 PM UTC-5, Michael Terrell wrote:

The payback only appears to be eight years. There is interest involved in the initial costs. Also the solar panels will raise your property taxes.

There is that. There is the false assumption of $2,500 in avoided utility bills - possible in some parts of the US with good sun, no snow, and dry-but-dust-free weather. Oh, and the service life of 35 years. Sure. All good.

And, of course, EnergySage wants to sell you solar panels on commission from local installers. Naturally, their figures will be highly optimistic.

Peter Wieck
Melrose Park, PA