: how many KWh does it take to charge a depleted battery



htcvick
09-28-2013, 09:28 PM
I have been posed the question of how many KWh of electricity does it take to charge a Volt with a depleted battery system? does any one know and does it matter whether it is 120 or 240 volts?

fishmahn
09-28-2013, 09:43 PM
Depending on year, the volt will use 10 - 10.5 kwh of the battery. With charging losses that means about 12.5-13 kwh to fully charge the battery. On the lower end if you are charging at 240 and the higher end for 120. Every battery is a little different (only by a couple % though), so it may vary slightly. There is some speculation that the 2014's have 11 kwh of available capacity, but that hasn't been confirmed by GM, so maybe the 2014 could need 13.5 kwh, but again that's just speculation.

In cold weather, if you precondition the car before leaving (i.e. use remote start to heat the cabin), some additional power (up to 5kw for about 10 min = less than 1 kwh) will be drawn to heat the cabin. This is much preferred to having the battery supply the energy, which would have to be recharged again or reduce your available range.

Mike.

Upper5Percent
09-28-2013, 10:09 PM
I have been posed the question of how many KWh of electricity does it take to charge a Volt with a depleted battery system? does any one know and does it matter whether it is 120 or 240 volts?

http://gm-volt.com/forum/showthread.php?14348-Why-does-it-take-less-total-energy-to-fast-charge

jbfalaska
09-28-2013, 10:37 PM
11-12 kwh for mine. I drive daily. I suppose if you sit on the car for a week, you'll need more due to loss.

MrEnergyCzar
09-28-2013, 11:45 PM
I have been posed the question of how many KWh of electricity does it take to charge a Volt with a depleted battery system? does any one know and does it matter whether it is 120 or 240 volts?

You'll use about .5 KWH more using the 120v. It takes about 12.9 KWH to fully charge a depleted pack.... slightly more or less depending on the model year.

MrEnergyCzar

Cord
09-29-2013, 01:49 AM
and it is a 16 KW battery.
You did want the FULL TAX credit - right :-)

Desert Volt
09-29-2013, 03:18 AM
Extreme heat makes a difference when charging. My Volt usually charges in the garage starting at 8pm when the electric rates are lower. During the summer its often still over 100 degrees and never cools below 90, so the TMS runs pretty constant while charging. In this condition it takes up to 14.5 KWH to fully charge a MY 2013.

jsmay311
09-29-2013, 04:44 AM
The original EPA sticker for the 2011 showed 12.9 kwh for a full charge. It doesn't indicate whether that's with 120V or 240V charging, but the charging time was given for 240V, for whatever that's worth.

2013's got a 0.5 kwh increase in total and usable battery capacity, so I think it's safe to assume 2013/4's would use 13.4 kwh. (The more recent EPA stickers don't include the same kwh info.) And, as mentioned, the specific temperature conditions when charging may cause the values to differ.

volted2012
09-29-2013, 05:48 AM
Interesting fact:

Last thursday I charged my car in a public parking lot with my standard mobile charger on "stage 2". I drove for about 25 mi, parked my car at the company's parking lot (can't charge at work), coming off work, the battery surprisingly added 4 extra miles to the battery.

F8L
09-29-2013, 10:19 AM
Interesting fact:

Last thursday I charged my car in a public parking lot with my standard mobile charger on "stage 2". I drove for about 25 mi, parked my car at the company's parking lot (can't charge at work), coming off work, the battery surprisingly added 4 extra miles to the battery.
The battery did magically increase your range, the range estimator did. Your last driving session may have been more efficient and or temps were higher or lower than ideal or you turned off air conditioning, etc.

When I leave work on a full charge and head downhill, my range goes up from 44 miles of range to 50+. I didn't add much energy and I definitely used some so the increase in estimated range is due to current driving conditions being very efficient (<6kW at 70mph).

Ladogaboy
09-29-2013, 11:32 AM
Extreme heat makes a difference when charging. My Volt usually charges in the garage starting at 8pm when the electric rates are lower. During the summer its often still over 100 degrees and never cools below 90, so the TMS runs pretty constant while charging. In this condition it takes up to 14.5 KWH to fully charge a MY 2013.

This matches my experiences as well. My garage isn't well ventilated, and on days/nights over 90-100 F, the Volt was requiring over 14 kWh to recharge on 120 V.

Norton
09-29-2013, 11:47 AM
Or, you can answer this question yourself for $29 shipped:
http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q/ref=sr_1_2?s=electronics&ie=UTF8&qid=1380465476&sr=1-2&keywords=kill+a+watt

You can get a similar meter for 240V chargers for a little more.

With this Kill A Watt you can zero it on the 1st of the month and have an exact cost for one of your fuels !

I'm still trying to find a place to log my gas fillups. I don't want to be the only Volt on fuelly.com. That's old tech.

solar_dave
09-29-2013, 12:13 PM
This matches my experiences as well. My garage isn't well ventilated, and on days/nights over 90-100 F, the Volt was requiring over 14 kWh to recharge on 120 V.

Yep that is the thermal management system at work to maintain the battery temps.

Ladogaboy
09-29-2013, 12:46 PM
Yep that is the thermal management system at work to maintain the battery temps.

Heh, small price to pay for extended battery life, right Nissan?

BAZINGA
09-29-2013, 12:58 PM
Interesting fact:

Last thursday I charged my car in a public parking lot with my standard mobile charger on "stage 2". I drove for about 25 mi, parked my car at the company's parking lot (can't charge at work), coming off work, the battery surprisingly added 4 extra miles to the battery.

That happens to me all the time, but usually not that big of a gain, it's usually in the 1 to 2 mile range that it will increase. And yes it's just catching up to any favorable past driving which this time of year with cooler temps occurs more often than in the winter or summer which usually reports a decrease. So enjoy FALL.

tboult
09-29-2013, 01:03 PM
Or, you can answer this question yourself for $29 shipped:
http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q/ref=sr_1_2?s=electronics&ie=UTF8&qid=1380465476&sr=1-2&keywords=kill+a+watt

You can get a similar meter for 240V chargers for a little more.

With this Kill A Watt you can zero it on the 1st of the month and have an exact cost for one of your fuels !

I'm still trying to find a place to log my gas fillups. I don't want to be the only Volt on fuelly.com. That's old tech.

You might even be able to get "check out" a kill-a-watt for free, check with our local library.. our loans out kill-a-watts just like books. When you get it ou can also go around the house looking for vampire loads (Things drawing lots of power while "off") and maybe reduce your overall house usage.

Bob G
09-29-2013, 01:47 PM
Heh, small price to pay for extended battery life, right Nissan?

Bazinga! :)

Bob G
09-29-2013, 01:51 PM
The battery did magically increase your range, the range estimator did. Your last driving session may have been more efficient and or temps were higher or lower than ideal or you turned off air conditioning, etc.

When I leave work on a full charge and head downhill, my range goes up from 44 miles of range to 50+. I didn't add much energy and I definitely used some so the increase in estimated range is due to current driving conditions being very efficient (<6kW at 70mph).

Concur. I commute 11 miles to work, which is at lower altitude. On the way to work, I typically use about 7 miles of estimated battery range, and on the way back, I typically use about 15. The car has no way to know the road ahead, so it just estimates based on recent conditions.

Voltairean
09-29-2013, 01:52 PM
Mine MY2012 averages 11 kWh via MyVolt.com and that's with a daily commute of 100+ miles charging at home with Level 2 and at work with a Level 1.

Maz94protege
10-17-2013, 09:29 AM
13kWh daily, i deplete the battery daily on my 93mile RT commute. cost is negligable, $ .06 per kWh (1am-5am, super off-peak charging)

I Love this car!

Sheldon
06-30-2014, 09:04 AM
13kWh daily, i deplete the battery daily on my 93mile RT commute. cost is negligable, $ .06 per kWh (1am-5am, super off-peak charging)


2014 volt; I measured 13.86 kwatt hours overnight on my new kill-a-watt meter, charging using 12amps, 120v on a completely drained battery. I think it was 11.22 watts at the end of the drive, for estimated battery capacity used. I wonder if perhaps the warm temperatures, mid '80s at 9pm when the charge started, increased the kwatts used to charge the battery. The garage is a little stuffy, though I cracked open the door for ventilation.