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Is the EV range display just a guess based on temperature?

4066 Views 15 Replies 12 Participants Last post by  hellsop, 
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What determines the EV range that is displayed? Is it just a guess based on the temperature or is it somehow constantly adjusting based on driving habits, temperature, etc.?

When I got my car in October the EV range went as high as 57 miles while it was in the 60s and 70s outside. Yesterday I ran the car to 0 EV range and drove on the ICE so the battery got a full recharge last night. Today it's about 52 degrees outside and the car is only showing 40 miles EV range.

I'm wondering if this is just the car guessing based on the most recent conditions and after I drive it and recharge it today the range will actually increase... or is this the actual max range I will get right now? Is the car just assuming that I will use the heater, heated seats, drive a certain way, etc. and combining that with the air temperature to say 40 miles, so if I were to drive without the heater on I would get more?
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Okay thanks... so it sounds like the number isn't really tied to what the car will try to use. I was just concerned that somehow my range had gone down and now the car isn't recovering as much range because it thinks the battery is full when it really isn't or something. It seems like I saw a few posts with issues around the battery level and the car not fully recharging or not using all of the available charge.
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llninja said:
If you drive without the heater on, you might eek out a few more miles, but the car still needs the heater to warm the battery. I'm surprised you're asking this question since you've been on this forum for years. You can also affect it negatively by driving like Jeff Gordon and positively by driving it like a grandpa. Or switch from your regular commute to a long trip soemwhere, and the numbers will change, then return back to normal when you change back.
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Okay thanks... I've been lurking for years but just got my first Volt two months ago :)

Just wanted to make sure there weren't any odd things that needed to be done like reset the way the car senses the current charge level or something. Since I just had to get the transmission replaced (see other thread) I'm wanting to make sure there aren't any reset procedures or other software fixes that need to be done.
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