I have an idea that could potentially make it so you can produce more electricity for more generators to run your car. basically you modify your exhaust to mount a modified turbo charger so it spins multiple alternators to generate more electricity. i have a simple diagram to help explain.
i want to set up a small scale test with a small lawn mower engine to work out all the bugs, and tweak it so it works a bit more efficiently bit it can possibly work with a few more modifications. you can power more cells this way.