just frank wrote: ↑
Wed Apr 04, 2018 3:32 am
OK, I have been driving my Bolt on highway roadtrips, in temps around freezing, with snow tires on, and getting >3 miles/kWh if the speed is under ~70 mph. 2mile/kWh is just nuts. IOW, I am getting 180 miles on a full charge worst case, more like 200 typical in winter conditions at HW speeds.
We have been getting 180 miles worst case on the Bolt as well, but different conditions. Winter time, mostly city driving, heater around 75F whenever it is under about 60 outside (meaning for all night time driving, some day driving). There is no snow around here, and the lowest it has ever gotten is probably 28F outside and that's only maybe 4 nights a year worst case.
Even though my husband drives slower than me, he does turn on the heat as much as I do, or higher. We are Californians. He grew up in south Vietnam in a much hotter climate. I have seen him turn it as high as 77. It takes time for the heater to work and I end up having to dial it back down if I'm in the car. Never below 72 in the car, though. At home we heat to 70.
I think the difference is likely just the hills. Any trip back home involves a huge penalty on the last half mile up. If I take that 0.6 mile hill at 15mph, that distance will consume 0.5 - 0.6 kWh in either the Volt or Bolt. If I take it at 25mph, it will be closer to 0.8 - 0.9 kWh. It may not sound like it, but if every other trip you make is a relatively short (5-15 miles) trip that includes this section, it will end up bringing down average miles/kWh enormously. In fact, I mostly have much more respectable miles/kWh average for the day before I take that hill.
Sometimes we get as much as 0.3 kWh of regen on the downhill for that short distance, if the car is not fully charged starting from the top.
In my Volt, it has happened countless times that I saw 1-4 miles on the GOM on a return trip home, and then while driving that last half mile, the car has to switch to gas, sometimes really really close, just before I turn into the driveway (even that is uphill).
It's very possible that hills kill mileage more than the low temps . I can see how that would be the case if you are not turning on the heater, or turning it to a low setting.
But others have experienced less than 180 miles of range worst case. For example, in this trip report :
https://www.greencarreports.com/news/11 ... ges-remain
With my little lead foot taking us down the freeway at an average of 80 mph, we got nowhere near the 238-mile rated range. After 103 miles, we showed only 70 miles of remaining range.
That would be 173 miles at 80 mph which would still be quite respectable, but less than your worst case. Speed really kills range in EVs.
Wanna go ~400 miles one way? now you are doing 3 30-40 minute stops each way, and adding at least an hour to your 6-7 hour drive assuming you would've stopped for food/restroom anyway. Hardly a hardship if you have the DCFC available.
Yes, and the problem is that unbelievably , we still don't have any CCS or ChaDeMO between SF and LA on the shortest route, which is I-5, or the scenic route, which is highway 1. Using any EV other than Tesla, one would have to use a longer route through 101 in order to be able to make the trip without stopping overnight for L2 charging. This route also adds about 40 miles of driving. You could make the drive with a single charging stop in the Bolt if speed is not too high (70mph or less average).
Why are we talking about cars with 300 kWh batteries again?
This was in the context of driving at the highest speed allowed by traffic conditions (not maximum legal), for the maximum amount of time that one would tolerate driving in a day. These trips are generally best done in an ICE.
For myself, I would consider 10 hour driving to be the max per day. I think I did that only once, and that was involuntary : a one-way drive from SJ to LA the day before Thanksgiving, in the daytime. That's a 360 miles drive. High rate of speed certainly wasn't a concern. But I will never take a long drive on that day of the year again. I really felt like a hostage as I expected the drive to take no more than 6 - 6.5 hours, having my best-ever time for at 4.5 hours during night-time on a normal day of the year. The longest planned drive that I made was San Diego to San Jose in 7 hours on a sunday afternoon/evening, and I thought it would take at least an hour more, but we beat that time.