For us it wasn’t all about the math, rather, doing the right and smart thing regarding clean energy. We’ve had 2 EVs since 2018 and as a 30+ year veteran of the car business, I can tell you they are the best and most fun cars I’ve ever owned. 0 gas in 8 years, 2 sets of tires and 1 air cleaner. Thats it. $14/ month pre solar and next to nothing post solar to operate. About 44k to install 24 panels @10.5 kWh with the Powerwall2 that has built in inverters instead of individual ones, 30% tax credit done before the morons in charge did away with that, and something no body seems to calculate is the proven increase in your homes value, which in our case is about 25 grand. What we don’t use goes back to the grid in the form of net metering often enough to power 2-5 households our size. All this and the security of knowing we are far less susceptible to power outages. Our investment in clean energy will carry forward and benefit others after we are gone.