One thought to add to this, since the OP mentioned she'd take her ICE next time:
How much do you value your time? Even if Supercharging took an hour longer than gassing up an ICE, but you saved $40 in fuel cost because Supercharging is free...then you effectively broke even if you value your time at $40 per hour. If you also went to the bathroom and/or ate a meal during that time, then it's not wasted time and you should subtract that from the total. If you were able to do those other things in 30 minutes of that hour, then you can really consider Supercharging as only "wasting" 30 minutes of that hour. So in that case, if you value your time at less than $80/hour, you came out ahead by Supercharging. If you value your time at more than $80/hour, then it would have been better to take the ICE.
Then there are other non-tangibles to consider (environmental stewardship, joy of driving electric, etc.).
In other words, the pure time it takes to refuel is not the only metric to consider. Unless, of course, you for some reason can't build that extra time into your travel schedule.