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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?
 

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The only way to know how accurate the estimated range is would be to compare actual mileage to the range. I'm lucky in that way as I have to keep track each day for work. My estimated range hasn't changed much over the winter but the actual usage per kilometre varies widely. There are days when I get half of my estimated range and days when I double the estimate. Most won't see this wild fluctuation but my driving is one of the worst for efficiency. I deliver mail so my vehicle may only see 30-90 kms but be 'running' for three hours.


Given these fluctuations I wouldn't expect the estimated range to change until I shut down the HVAC system in another month or so (I almost never use my A/C).
 

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2021 Bolt Premier
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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?

My 2017 Premier's full range is about 190 miles if it gets much below 45F at night. I noted that it took several days above 60F at night to see much improvement.
 

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21 Sienna "Sparkollz" 22 EUV "Titinsky"
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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?
In my own experience, the GOM does remember unusual energy usage patterns, but not for weeks. When you take your longer weekend trips, let's say 100 miles, what kind of figures you are seeing (mi/kWh, SoC after completing the trip etc).
 

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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?
I am seeing 192 miles range from the GOM today in the same climate. Please report the usage percentages from your car. My car shows shows Driving/Acc = 83%, Climate Settings 17%.
 

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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?
I find it hard to believe that any Bolt would, in temperatures of “high 30's during the day and low 20's at night” ever say that it had 230 miles of range.

Also, it isn't just temperature that affects range, it's also conditions. Driving in pouring rain will be less efficient and the car will thus report a lower expected range.

I'd recommend you check what kind of driving efficiency you're getting on the days you travel (i.e., how man miles/kWh). If day after day you're somehow getting 4.5 miles/kWh and yet somehow the range is low, then I'd worry. If it's coming out to be about 3 miles/kWh, then 150 miles of range would be about right.
 

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After a very cold snap (minus 5 deg.) in New Jersey in January the charging range dropped from about 230 miles to about 150. After one full month and more seasonal temperatures in my garage and outside (in the high 30's during the day and low 20's at night) the charging range has still not increased. I have Hilltop reserve turned off. We drive every day about 20 miles, and longer trips once a week.

How long should it take for the charging range to return to normal? Or could there be a problem with the battery or software?
I find it hard to believe that any Bolt would, in temperatures of “high 30's during the day and low 20's at night” ever say that it had 230 miles of range.

Also, it isn't just temperature that affects range, it's also conditions. Driving in pouring rain will be less efficient and the car will thus report a lower expected range.

I'd recommend you check what kind of driving efficiency you're getting on the days you travel (i.e., how man miles/kWh). If day after day you're somehow getting 4.5 miles/kWh and yet somehow the range is low, then I'd worry. If it's coming out to be about 3 miles/kWh, then 150 miles of range would be about right.
The past couple of days it's been high 20's at night and low 40's during the day and my range didn't change. Still showing over 240. I suspect that it requires some time of those temperatures to alter the GOM. It probably integrates temperature over time into it's estimate. The only time my GOM range changes is when:

A) I turn on the heat, at which point it plunges (I am sure every bolt owner has seen this).
B) I drive through the rain (increased rolling resistance through water has a significant negative impact)
C) I have passengers or cargo in the vehicle (accelerating additional mass is bad mmkay)
 

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The range estimator works off of both conditions and driving history. There are so many factors that it would be difficult to determine why the estimated range is so low. You did say your regular commute is only 20 minutes, and even under temperate conditions, short trips could throw off the estimate.
 
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