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

4080 Views 15 Replies 12 Participants Last post by  hellsop
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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My point was that even if you turn the heater off, the car will still heat itself to keep the battery warm. I didn't get into the specifics about the different heaters and loops. Personally, I'd rather be warm and blow my EV mileage than be one of those crazy people who don a snowmobile outfit and disable ERDTT to gain a few miles or avoid a fuel burn. Especially when I am known to take on any and all pony cars at stoplights. With all this abuse, I'm still achieving 70 mpg lifetime, way better than any Prius - except now maybe the Prius prime is getting close to achieving gen1 numbers.
It probably is. Too bad there still doesn't seem to be a "PriusStats" website. :) (Fuelly is okay for guessing what the overall average mpg is (~46mpg) for all Priuses, but it's all self-reported and nobody seems to know wtf kind of Prius they got. (don't laugh, the Volt figures there are worse).) (Did I get all the parens right there?)
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