You mentioned level 1.5 and it reminded me of something you may not be aware of yet. The stock 120v EVSE that is included with the PacHy will work just fine at 240v and can charge your car twice as fast. It apparently was designed to accept either 120v or 240v on its input and a number of people here (including myself) have taken advantage of that fact. You can either build (or buy) an adapter cable as many have done or you can wire a dedicated 120v receptacle with 240v (as I have done). I used a 20-amp receptacle which is a little beefier than a 15-amp and it is a dedicated receptacle at my shop where the EVSE is plugged in 24/7. The EVSE then technically becomes a Level 2 and I can add about 20% charge per hour to my van.Very interesting! I'd love to see a test on it. I'm more concerned about the longevity of the battery and battery health. Most of the time level 1 will be fine. Other times I'll want level 1.5 and then a small percentage of the time I'll need the speed of level 2.