Reduced battery performance/range
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Thread: Reduced battery performance/range

  1. #11
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    This suggestion has Also been pounded to death - but make sure that you have the auto defrost set Off (it's On by default). Makes a huge difference.

    That said, it Hasn't been cold enough yet up here to really bring the AER down as far as you say, not from just the temperature at least. Watch the energy data page (center screen) and verify that you are still getting the 10.5 Kw of energy (more or less) out of the battery when it completely depletes (after a screen reset at the conclusion of a full charge). Just in case something is going on there.

    Unlikely that you have a battery or charging problem, Very unlikely, but verifying the amount of energy that the battery delivers is simple enough..
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  2. #12
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    Quote Originally Posted by GRussell View Post
    Hi Ziv, Pepperish, & firehawk -
    Thank you for your reply... especially since it's been kicked to death. My apologies... somehow searching for "reduced" "battery" "performance" "range", etc. and wading through the 1st 5 pages didn't find what I was looking for.
    No problems Glenn. The search function on the site "leaves something to be desired". LOL

    FYI there is a little box at the bottom of a thread which gives a list of related threads. Sometimes this is better than search but the Catch 22 is that you have to post before you can see it.

    The whole weather thing can catch you by surprise even if you know it's coming. Where I am we only see a 10F swing between the July and January highs but the range estimate started dropping a week or so ago and it got my attention. Even two winters wasn't enough to make the routine ingrained and it took me a minute to remember. Those lovely high mileage estimates are hard to give up.

    If this makes you feel better, Argonne is testing the Volt battery for the DOE. So far the Volt battery, like all batteries, has lost capacity. However, performance, including range and acceleration, has stayed exactly the same. That should continue for many years and even at what is technically battery EOL you should still have electric range.

  3. #13
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    You should also make use of cabin pre-conditioning. Since you have a 240V EVSE, it can keep up and reduce the need to use the heater. Remember to set climate back to fan only with low fan speed to keep it warm inside. Ice ECO if it is really cold. Set the climate controls to Comfort the night before. If you are set to fan only, pre-conditioning will do nothing but run the fans.
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  6. #14
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    Beware the auto-defog. Even when you turn it off, climate stays on and could be at 40%+

    So make sure you go back to the climate screen and notch the fan to zero
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  7. #15
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    even if you do not run the electric cabin heater in the cold the Electric battery heater will run automaticly and reduce yor range, other factors will also reduce your cold weather range.

  8. #16
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    See our FAQ on this reduced battery mile estimate concern: http://gm-volt.com/forum/showthread....-50-s.-Problem
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  9. #17
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    I've seen a reduced AER of about 3 to 5 miles over the past few weeks and I have not used any heat...yet. I think that as the temperature goes down, the air becomes denser and it will takes more energy to move through it. How much? I have no idea. Does anyone have any type of information regarding this? My gut feeling is that it is more than insignificant, at least based on my Volts performance in cooler/cold weather.
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  10. #18
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    Quote Originally Posted by David B. Kelting View Post
    I think that as the temperature goes down, the air becomes denser and it will takes more energy to move through it. How much? I have no idea. Does anyone have any type of information regarding this?
    Cold air is indeed more dense, which translates into more resistance to motion, which in turn increases the amount of power needed by a car to cut through it. Colder air will also lower tire pressure, resulting in less mpg. Colder air causes people to use the heater and defrosters more, which also reduce mileage. Colder air is often accompanied by wet weather, which can increase resistance as well as reducing tire grip and cause energy wasting traffic snarls. Colder weather affects the lubricants as well, making them thicker, again increasing resistance to motion. Gasoline grades can also change with the weather. Dense air causes the ICE to use more fuel as well.

    For the same distance and route traveled, all of these add up to more power needed in cold weather than warm. And that is seen as fewer miles from the battery.
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  11. #19
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    ChevyVoltColdWeatherTips.pdf

    Hopefully this will help!

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  13. #20
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    Great info here. You guys are the best! Thanks again guys.
    -Glenn

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