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I have a 2012 Volt 48K. I've noticed that my mileage after a full charge has dropped from 40 miles to 25-28! in the last 12 months.

Has this happened to anyone else?
Why is this happening?
Is there anything that the warranty can do?

Thanks,
SK
 

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25-28 is considered normal if you are in a cold climate ( lower than about 55 degrees or so ). The closer you get to the freezing mark, the lower you mileage will be due to the battery not being as efficient in the cold as well as having the electric heat warming the cabin. Many of us drop down into the low 20's this time of year.
 

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I have a 2012 Volt 48K. I've noticed that my mileage after a full charge has dropped from 40 miles to 25-28! in the last 12 months.

Has this happened to anyone else?
Why is this happening?
Is there anything that the warranty can do?

Thanks,
SK
do you live in a cool winter climate?
do you use a/c or heat?
do you drive agressivly or fast?
do you keep your tires inflated toat least 38 psi?
all these factors affect your battery,and will cause lower than normal charge
even sitting at work you can lose a few ev miles just by the outside temperature
 

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WINTER,WINTER,WINTER... MAIN BATTERY self heater 2KwH, CABIN heater 6 KwH,,,Preheat, drive ICE first 5-10 minutes, use heat from engine rest of the trip on electric mode,,,good luck.
 

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All good comments above. A fully charged Volt shows 10 green bars on the driver’s display. Your 2012 Volt has just a tad over 10 kWh of useable grid power stored in the battery when fully charged, or ~ 1 kWh for each green bar. That power is used not only as propulsion fuel, but also as fuel for the accessories. Cabin heat and air conditioning can gobble up power; less power-hungry items are the radio, the heated seats, the windshield wipers, etc. Power may also be used for battery maintenance when you’re not plugged in. The more of that 10 kWh of power used in your 2012 Volt by the accessories, the less available for propulsion.

It’s normal, then, for your full charge ev estimated range, and your miles/kWh "electric mileage," to cycle up and down throughout the year. In warmer weather, a greater proportion of the power gets used as propulsion fuel by the electric motor. In colder weather, not only does the portion of the full charge used for cabin heat and headlights and windshield wipers usually increase (i.e., weather is colder and rainier/snowier, windows get foggy, nights are longer), but also it takes more electricity to move the car the same distance when the air is cold and dense and the pavement is wet than when the air is warm and the pavement is dry. In short, even if your driving habits remain consistent, the distance you can drive on a full charge cycles throughout the year.
 

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I wish folks would provide a bit more info in their profile so we could better help them. I'm guessing this is a first time owner experiencing COLDER temps than he has in the previous several months of ownership.
 

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I just emerged from a 27 day stretch with temps below 20°. My range dropped into the upper teens. It just recently went back above 32° again and my range has gone up to about 23 miles.
 

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Where is the OP who put this up? He didn't answer any questions or provide any relevant information for the helpful people here--who have posted charts, graphs, and offered numerous suggestions.
 
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