Submitted by draymond on Fri, 2019-01-04 15:08
I made a round trip from my home in Longmont, CO to the Loveland Ski Area and back. The distance is 92 miles each way. I left with 275 miles of range on the battery. When I arrived I had 100 miles of range. After skiing for 6 hours I came back to my car and it had 88 miles of range. When I returned home I had 52 miles of range. I'm surprised by these numbers and the very large discrepancy between power consumed on each leg of the trip (175 miles out and 36 miles back). Here are the factors I can identify which might have contributed to the discrepancy:
1) Elevation change. The elevation in Longmont is 5,000' and the elevation at the Loveland Ski Area is 10,800'.
2) Speed. On the outward leg I drove in the left lane at the same speed as the other traffic in that lane (using autopilot most of the time). On the return leg I drove manually the whole time in the right lane and kept the speed mostly between 45mph and 55mph. At times I had to go faster (up to 65mph) to avoid obstructing traffic.
3) Climate control. I ran the heater at 65 degrees Fahrenheit on the outward leg but I turned it off completely on the return leg due to range anxiety. The outside air temperature ranged from 5 degrees to 15 degrees. It was very uncomfortable with the heater off (cold hands and numb toes by the time I got back) and I had to run the front defroster (in cold mode) periodically to defog the windshield.
Have others had similar experiences? What factor do you think contributed most?