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Discussion Starter #1
How many miles are people going who average around 55mph and go through maybe one or two small towns? Also, what do you get when you use eco AC when it is about 70 out?

I've been getting about 39-42 in eco AC mode. Averaging right at or below 4 miles per kwh.

Seems low to me based on what my 2012 did.

Other facts:
- Last complete battery discharge shows I got 10.8kwh
- Fan has an annoying hum. I took it in to the dealer and 20 minutes later they said they replaced it. In talking with the tech I don't think they actually replaced it. He seemed to think the hum was normal. I do not. No other car I know does that including my 2012 Volt.
 

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How many miles are people going who average around 55mph and go through maybe one or two small towns? Also, what do you get when you use eco AC when it is about 70 out?
Often do drive that way. I'd normally be Fan Only, though. I'm good with no AC below about 75 even with the limited ventilation through the climate system.

I've been getting about 39-42 in eco AC mode. Averaging right at or below 4 miles per kwh.

Seems low to me based on what my 2012 did.
Maybe a little. I'd expect upper 40s. What tires do you have, and how much air is in them?

Other facts:
- Last complete battery discharge shows I got 10.8kwh
- Fan has an annoying hum. I took it in to the dealer and 20 minutes later they said they replaced it. In talking with the tech I don't think they actually replaced it. He seemed to think the hum was normal. I do not. No other car I know does that including my 2012 Volt.
The amount of discharge is normal. I don't think the fan is affecting your MPG that much, though.
 

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I normally get 55-60 ev miles per charge
I usually use my seat heater when it gets cold

And if i use my a/c i use the eco setting, as it only uses around 18%
 

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2013 - Best EV only range, which was in Miami, Florida was 48 miles. Most of the time we were over 40 miles per full charge.

Alaska - Summer, with OEM tires on it, we would see mid to upper 30s. In the winter, with studded, winter tires LOW 20s and if I kept those tires on after spring break up, we were lucky to get 30 miles. I kept my tires around 40-42 PSI as well. Last summer we had the car, I removed the studs and kept the winter tires on (since we were turning the car in) and I still got a max of 32 miles on a charge. This is with no AC or Heat on. Summer where I am in Alaska means highs in the 70s...
 

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Here's my experience from 2 years with a 2015. (All numbers are from memory. Unlike others, I haven't taken the time to document my results.)

My daily commute is between 29.1 and 31.6 miles. I drive 10 miles highway (65+ mph), 5 miles back road (35-40 mph) . On normal days (60 - 75 degrees) I will get 38/39 miles on a charge.

Lately, I've tried a slightly different route which changes the mileage mix to 7 highway 8 back roads. This has increased my range to 44/45. But added 5 minutes to my 25 minute commute.

I really think the highway driving has a significant negative impact on range. Recently, using the back road route, stop and go highway traffic coming home and no heat or A/C, I made the 29 mile round trip with 22 miles left on the GOM.

So your numbers really don't seem out of bounds. Especially when we don't know how you arrive at the 55 mph average.
 

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All our Volts get about 4.0 miles per kWh at 55-65 mph sustained on roundtrips with ECO setting in temps above 50°F and no heater after preheating cabin. 55 sustained gets about 4.5 miles per kWh roundtrip. Our roundtrips normally require a 600' altitude change. Traffic congestion will raise that up as high as 5.0 miles per kWh roundtrip.
 

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My daily commute is 39 miles, 55mph max (20 miles), 2 lane roads in Michigan. Typically get 4.1 miles per kwh at average temp. 5-6 miles left on meter in summer, short 1-3 miles run on gas in winter (using heat).
 

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Anything over 45 mph puts a pretty significant drain on the battery. 40 mile AER on Gen 1 at 55 mph seems reasonable. My 2012 I get less than 30 mile AER at 65-75 mph. I have high performance tires that cut about 10%. I rarely drive right at 55 mph anywhere. Speeds are usually 45 or less or 60 and up due to speed limits on local roads (+5 to 8 mph), so I am not sure exactly where that cutoff occurs.
 

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I should have said where i live?i live in Florida ,
And i regularly get anywhete from 55/60 ev miles per full charge
 

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2012 had the longer air dam, which was dropped in the '15. Might make a slight difference, especially at higher speeds. Also, heard this comment from others who went from 12' to 15' that there didn't seem to be any appreciable range gain despite the slightly increased battery pack--that the car was just slightly less efficient somehow in terms of miles/kwh.
 

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My 2012 is using around 10.5-10.7. I thought newer Volts had more capacity than mine?
10.8kwh doesn't seem as high as I thought it would be on a newer one compared to mine.
 

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The larger batteries in 2015 still have roughly same software limit, but "should" end up with longer useful lives due to eventual capacity loss. [
 

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60 ev miles with a single charge at 55 mph in a gen 1 ?
Hello.. Note that "2015 Volt" did not mention his MPH. Which is critical when stating EV miles. although the thread heading does say 55MPH

I usually stay below just 60MPH and get 37-39 EV miles. If i do 55MPH for a major part of the trip I will get over 41 to 44 EV miles. In a 2015 for 1.7 years now. it has been awhile since I have done 55MPH the whole trip.

Based on the below data my avg of 60MPH gives 294 x 52mi =15.2 KW-Hr, more then the capacity of the battery so these numbers must not account for all field conditions as they where done on a dynomoneter.

But if i extrapolate from 60MPH to 55 i would theoretically get 48 at 55MPH. Mr 2015 Volt is driving real good (no accell's) to get 55 EV miles


Energy Consumption at Steady-State Speed, 0% Grade (also on a dyno)
10 mph 219.5 Wh/mi
20 mph 160.8 Wh/mi <<- possibly best EV range ballpark?
30 mph 180.0 Wh/mi
40 mph 207.8 Wh/mi
50 mph 253.1 Wh/mi
60 mph 294.2 Wh/mi
70 mph 361.6 Wh/mi
80 mph 411.4 Wh/mi

https://avt.inl.gov/sites/default/fi...vroletvolt.pdf

Here's info on the 2011 Volt, without the dyno test: https://avt.inl.gov/sites/default/fi...vroletvolt.pdf
 

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Without AC, I peak at around 80km/50mi optimum
Typical summer probably 75km/47mi, add in AC, 66/41 or so.
AC is hard because it depends on how much you're driving and how hot it actually is.
No AC is easy to estimate because the only variable is speed and ambient temp (provided it's not so hot that AC is required for battery cooling)

My 2012 is using around 10.5-10.7. I thought newer Volts had more capacity than mine?
10.8kwh doesn't seem as high as I thought it would be on a newer one compared to mine.
11-12 normal 10.0-10.4
12*-14 normal 10.4-10.8
14*-15 normal 10.8-11.2

Only significant change was 2016+ up to 14.x
*late builds in model years got the next battery up
 

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Discussion Starter #17
>Maybe a little. I'd expect upper 40s. What tires do you have, and how much air is in them?

Still have factory tires.
Air pressure: 37-39

How I arrived at 55mph average:
commute is 44miles round trip on two lane highway with 55mph speed limit. Drive about 60.
Go through one town of 3000 people.
3 other stop signs.

Thank you for all the replies. Looks like our range and miles per kwh of around 3.9/4.0 are about normal with the exception of the guy that goes 60 miles on a charge. No way I'd ever get close to that.
 

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>Maybe a little. I'd expect upper 40s. What tires do you have, and how much air is in them?

Still have factory tires.
Air pressure: 37-39

How I arrived at 55mph average:
commute is 44miles round trip on two lane highway with 55mph speed limit. Drive about 60.
Go through one town of 3000 people.
3 other stop signs.

Thank you for all the replies. Looks like our range and miles per kwh of around 3.9/4.0 are about normal with the exception of the guy that goes 60 miles on a charge. No way I'd ever get close to that.
To go 60 miles on a G1 Volt you should probably live in a state with legal marijuana. No problem. Drive 25mph on the freeway with a jumbo bag of Doritos and a Big Gulp.
 

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H.....Fan has an annoying hum.
I have a 2013, so I can't comment on what you should expect in a 2015, though I can say that I see range anywhere from 20 on a 16 degree winter's day with wipers and lights running and heaters on high and defroster running, to over 50 miles range at 45 -50 mph on nice 65 degree day.

what I can comment on though is the "hum". mine is not the fan, but the water pump the circulates the cabin coolant anytime the fan Is running. The hum doesn't vary with fan speed, and I had the pump changed at one point in the hope of making it better and it did not. Its just a function of pump design, and how it is mounted and how the acoustics couples through the coolant into the vehicle cabin. you could do what I do,.... turn up the radio....
 

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All I can say is "wow". I've never managed over 33 miles on one "tank of battery" in my 2015 (without an intraday charge...). Mostly city driving, typically around 35mph. All seems normal, original tires perhaps a touch underinflated at 38-40psi.

Hans.
 
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