Solar + Battery + EV - No need for a pump, just sayin…
How much panel surface would you need to drive an EV, say, 100 miles a week?
Depending on your EV car, your driving habits, etc you might get ~4mi/kWh. So for 100mi, you're looking at 25kWh to get your 100mi weekly range.
So over the course of 42 weekly hours, you'll need to come up with 25kWh. 25,000Wh / 42 hours converts to ~595.24W. So you'll want about 600W of generation capacity.
Modern PV cells usually get ~150W per square meter, so 600 W / 150 W/m^2 = 4 m^2.
You'll probably want to add a bit of additional overhead to deal with the weeks where you don't get quite a much sun and also with some of the losses in the system. As an additional note, this is only really thinking about the "peak" hours in the system. You'll get a few more hours a day charging at a lot of latitudes. This can also vary a decent bit based on the layout of your solar array.