The batteries come from battery bushes. Free for the picking.
So, it’s Bushes fault?..................
You can get lots of used batteries for free that still have some capacity left. Maybe this would be a good way to make use of them.
A battery is only required to start the process. When the hydrogen is run through the fuel cell a very small amount of the produced electricity is then used to continue the process. The remainder of electricity is used for whatever you want.
That's all fine and dandy... but when all the phosphorus runoff from your dishwasher detergent and battery bush fields start forming toxic algae blooms, there will be HELL to pay.
A couple dozen volts from solar will be pretty easy to achieve. You could set up a splitter in your backyard that could generate enough gas tp power your car for the next day.