I've now been on a few long trips in the Kona EV and it pretty much gets the miles it says it has. But I can milk the thing to better than 4Mi/kWh; in fact, one 129 mile trip I managed 5.2Mi/kWh using regen 0 and exceeding the speed limit.
For the long trips we traveled from Deer Isle, ME to Montreal, QC and back late Nov 2019 and traveled from Deer Isle, ME to Northfield, MA and then down to Springfield, MA and back late Jan 2020. Note both were in rather chilly conditions.
On the Springfield trip I saw there was a new 350kW Electrify America charger in Chicopee, MA at the Home Depot. 350kW!!! I was very excited to see how fast the Kona would charge up. We were there Jan 25, 2020 at about 5pm (dark) and it was raining cats and dogs. Had about 25 miles of range left and needed a minimum of 150 to swing thru Northfield and back to the next
CCS charger heading to ME.
The first problem was the insanely huge power hose was too short to reach the Kona's charge port. We had to park sideways to the charger just to connect.
The second problem seems to be common with the EA system. It would not initiate a charge or read my credit card. The call to tech support went well but took close to 20 minutes from arrival to juice.
If my son wasn't with me, I'm not sure I could have plugged and unplugged the power hose while on the phone with tech support because it was raining so hard. He was outside on the hose while I was wrangling the credit card.
After all that, the stats are: Max power 58.61kW -- Session length 00:43:34 -- Juice 35.5kWh
Rather disappointing. Remember that the vehicle is in control of the charge rate. Don't know why a depleted battery that had been driven for miles before charging couldn't take more of a wack. Possibly the 20 minutes of fooling around with tech support in the rain allowed the battery to cool down too much.
But the real shocker was the cost. Far and away the MOST EXPENSIVE charge ever. Start with the session fee of $1.00. Then the per minute fee of $0.58 and then top it off with $1.64 tax. For a total of $27.91. My previous record had been $16.62 for 27.72kWh at an EVGo charger in Augusta, ME.
The bottom line: avoid EA chargers unless there's no choice.