I just went thru this earlier this week. I also had some angst about my 'virgin long trip' in my Kona EV. My trip was to CLEAR LAKE OAKS, CA from the SF BAY AREA. Various maps were all showing the trip to be 128 miles each way = 256 miles RT. I topped my EV to 100% for the trip & it showed 310 available at start of trip. The journey climbs thru a windy long mountain road on HW 16 .. The regen of the charge allowed for literally 0 consumption of electricity during my downhill sections. (I left it on level 1 regen so that I didn't have to re-press the pedal - else it slowed down too much). I arrived with about 180 miles remaining - so plenty for my return trip. However, just for that whole "angst" thing, I plugged in the supplied 15amp supplied trickle charger for 8 hours which actually brought it up to 210 miles. I arrived home with 90 miles charge remaining. I DID run the AC for small periods of the trip = both way when temps got to 90+. But I was cautious about using it too much. Oh, and I did the speed limit the entire trip in CRUISE CONTROL, so wasn't lead foot.