I bought my 1.5 in Dec last year... At first, I charged only using the 120V mobile charger at home and consistently got 189/190 miles (ideal). Now, I mostly charge at work with ChargePoint 208V/30A charger and get 179-181 ideal miles. About six weeks ago, I installed the HPC at home, and get only 171-174 miles. I read many threads on this topic.... from what I understood the reason to be is that its like filling a bucket with a slow garden hose vs. a fire hose, so, you get less when you put energy too fast into the battery pack. To test this, yesterday at work, I manually set the amperage to 208V/16A, and I got 3 extra miles - 183IM. Is this correct understanding? I will never get 189IM if I used the HPC at home or ChargePoint at work?