Electric vehicles spawning with on-board solar panels makes them early game no-brainers. Once you have such an EV, you no longer need to worry about acquiring more fuel. I found a tyre-less EV on day#1 and a perfectly good one on day #3. After that, I ditched the gasoline one from day#1, permanently. Now I have a total of 6 swappable batteries and 7 solar panels. And there are more in town, due to unusually high rates of EVs.
I propose making them spawn without solar panels and to instead spawn solar panels on various roofs. I am aware that currently houses contain no power grids of their own, so let this be something to keep in mind. Perhaps having houses be “vehicles” of their own would make things work better?
PS: Which unit are battery capacity and power in?