15 minutes for what? 50 miles? 200 miles? 80% of the battery? 100% of the battery?
For me a BEV with 250 miles of range with an 80% charge time from zero in under 15 minutes would be ideal. We have three ranges we cover throughout the year.
1) Weekdays between 50 and 70 miles per day. We can charge at home between trips which is why the Clarity is perfect for us. We are 100% electric for weeks. I think of and speak of the Clarity as an electric car. A BEV with 250 miles of range would be overkill for daily use.
2) Road trips of 350 miles round trip. So a BEV with 250 miles would easily get us to our destination 175 miles away. We could then charge
for the return trip and have enough to get home. We make these trips about every six weeks. The Clarity does this quite well, the only difference being charge times for a BEV aren't short enough to be practical for us.
2) Two trips of 1,100 miles round trip each year. For a BEV with 250 miles of range we'd have to recharge twice to make the 550 miles one way. Then charge twice again on the return trip. That's two stops of 15 minutes each which would be similar to an ICE refuel. The Clarity handles this with ease.
The Clarity is actually close to ideal but of course I'd like to be free of the ICE and all of its moving parts, oil, etc. The fundamental factor for me is an ICE just seems archaic. It's 100 year old technology, using gas, creating dirty explosions, so much heat, valves, exhaust systems, radiators, hoses, and such. It's time to move on.
I personally don't think BEVs are quite ready for prime time. At least they aren't at our house.