A dc quick charging station can charge in 20 minutes with just one connection. Thats what I'm talking about. They just installed a dc quick charging station in my home town that charges from 50 kw up to 350 kw. Zeros charge tank is only 6 kw.
What type of DC charging station?
Tesla uses 480 volts DC, some now above 120KW (>250 amps).
If you're going to charge with DC, no charge tank is needed on the vehicle. DC charging is the charger, unlike J-1772 which is NOT a charger, just is AC supply power for your charge tank which converts it to the DC for the battery.
If the charger is not in the bike, that means you can have a MUCH larger charger. But you cannot go over the rating of your battery. Fully charging from near 0 SOC to 100% faster than an hour is probably asking for trouble on any of the Zero batteries. More charge current will get the batteries a lot hotter, until the battery is destroyed.
BTW, with the Tesla DC Superchargers, your best charge is done in about 20 minutes. After that, the charge rate MUST drop to prevent the batteries from overheating. And Teslas have coolant for the batteries. Because of the small size of motorcycles, and the battery, there are many limitations on what you can safely do. Cars, like my Tesla, have more room for things like battery coolant.
It would be nice if there were 1C DC chargers on the road for Zeros, but it is very unlikely to ever happen, unless Zero becomes extremely common the the road.
-Don- Reno, NV