Your link didn’t work, but I looked up similar ones and the videos were quite compelling. Cars can easily be started with super capacitors.
The problem I see, though, is lifetime complete replacement of a battery with them. To store the same amount of energy as a battery, a currently available super capacitor pack would weigh about a hundred pounds and occupy about 20 cubic feet of space. The super capacitors in the videos stored only a tiny fraction of the energy that batteries store. They simply can’t handle prolonged time between recharging, small draining during disuse, or alternator failure during driving. They would only keep the car running for a couple of minutes if the alternator failed at night.
I also found that it didn’t work.
The reason I brought your attention to the issue, was not for the purpose they were attempting, although one guy had a setup with a small 12V battery that would not start the car, but would recharge the caps in case you left the key on.
But I was thinking they would be good in a hybrid application, for bursts of power, or with their instant rechargability characteristic (on a buss with the voltaic cells) for true regenerative braking.
I don’t think I’d like to be around the number of caps you referenced, but I’m not that crazy about being around a bunch of deeply cycling batteries either....lead/acid or lithium ion.
The main purpose for the battery in my proposed project car would be simply for getting rolling from a dead stop, and to absorb or provide extra juice that would occur in the course of normal driving events....it may not be needed at all.
Another interesting lightweight energy storage devise, is the motor/generator flywheel (not my idea) It is a carbon fiber wheel, running at very high RPMs in a vacuum housing. The flywheel would connect through a reduction gearbox to the motor/gen and be revved up by applying juice (braking) or drawn upon by engaging the generator (starting from a dead stop)