And how much did everything cost you??
It'll take about 10 years to pay for itself, including the interest on the HELOC. And that assumes only a 3% inflation rate on the energy costs I'm avoiding. If the Dims keep making energy costs rise bigly, my system will pay for itself sooner.
These numbers don't include the upgrade and EV savings. I don't have a year's worth of data on those yet, all I can give you for them are projections and hope my assumptions are as accurate for the upgrade and EV as my assumptions were for my original solar system.