What I don’t understand is why Zero doesn’t make a more powerful build-in charger for the European market.
The standard charger is 1,3kw, which means at 220v about 6 ampere. European outlets can go easy to 10 or even 16 ampere, which would mean 50% less time to charge. For me that would be a better deal than a charge tank or other quick charge solutions.
Cost. They would have to spend more on the on-board charger to have it support two charge rates.
Zero have effectively managed to accomplish that with the charge tank. If you plug your kettle lead into a 220-240V outlet, it will charge using the charge tank at about 2.2kW and bypass the on-board. That's less than the 2.5kW it's capable of. I seem to recall it has something to do with legislation and sustained current draws. In a similar vein, my Kia Soul EV comes with a brick which is rated at 2.2kW. I've not seen it draw more than 2kW.
I think the charge tank should become standard equipment, or at least a much cheaper option. However, just as the Diginow charger is expensive, the charge tank isn't cheap either. There's some fundamental truth in that. They have to cover costs at least and make a small margin. If there was much scope to reduce the price and still make a small margin, I'm sure they would. That way they'd make more profit overall and the chargers would benefit a lot more bikers.
The biggest problem is that it's all done with small volumes. How many charge tanks will Zero sell in a year? How many orders do Diginow have for their super charger?
I hope that helps.