I think you save more money with an EV charging from home than you can with solar panels. Solar panels still take like 16-22 years to payback the investment.

>How Much do Motorists Really Spend on Fuel? Motorists spend an average of £1,288 a year to fuel a petrol and £1,795 for a diesel, for cars with average fuel economy

An EV charged from home will payback in more like 7-8 years, plus you get a new ride out of the deal vs just roof panels. The real downside is just the higher purchase price and the fact its very new tech that's going to have some bugs.

The easy way to manage money is to think about everything in terms of how long to get a payback from this investment. The investments that pay back the fastest are pretty much always the best.