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Old 02-10-2009, 02:54 PM
notnull notnull is offline
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Default Actual Wh per mile for your vehicle

For those of you who have invested in a device, like the “Kill a Watt” meter, to measure your energy consumption from the wall, please post your results.

Let’s just keep it simple to begin with and see what happens.

Here is mine:

Distance Driven: 9.5 miles
kWh from meter: 4.18

4180 Wh / 9.5 miles = 440 Wh per mile.

I have measured my charging process over twenty times and this is representative of my typical numbers, it varies only a small amount regardless of my driving style.

1990 Miata, ADC 9", 120V from Sears Platinum Marine PM-2 (rebadged Odyssey PC1500's)

Steve

Last edited by notnull; 02-10-2009 at 08:28 PM. Reason: added some specs on the car
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Old 02-10-2009, 05:52 PM
CPLTECH CPLTECH is offline
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Default Re: Actual Wh per mile for your vehicle

94 S10 120V 20- US145 Batteries 9in motor

Drove it 6K (city + hwy) miles for the past 19 months and used 3800KWH to charge it.
That equates to 633 WH per mile. For me at a grid charge of .12 per KWH, that is 7.5 cents per mile, average.
Due to inefficiencies on both the removal and the replacement of electrons, the actual usage is more than what the onboard Link 10 meter displays.

Watched a news segment a few days ago where a GM spokesman said that the Volt will cost one to two cents per mile to recharge. (Letís all laugh) But what homeowner is going to meter the usage. Plus, while his vehicle is more efficient than mine, his is expected to sell for more than 3X my conversion.
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Old 02-10-2009, 06:33 PM
notnull notnull is offline
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Default Re: Actual Wh per mile for your vehicle

Thanks for the information, this is exactly what I was hoping for.

I pay 17 cents per kWh, so I am also at 7.5 cents per mile.

I hope we can get enough data points to give people an idea of what to expect from a conversion. I still see way too much data that says it only costs 1 cent per mile to charge.

Tesla actually quotes 1 cent per mile for their vehicle. What a joke, the average cost of electricity in the US is 12 cents per kWH. Even with the efficiency of the Tesla it is still more like 4 cents per mile.

Steve
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Old 02-10-2009, 06:34 PM
Carroll_1 Carroll_1 is offline
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Default Re: Actual Wh per mile for your vehicle

1997 Chev S10 144V, (18) Trojan T875 8V, 9.1" ADC

Recorded the first 170 miles until I cooked my Kill-A-Watt meter
Averaged 617 whr per mile (latest measurements were about 585 whr per mile as I improved my EV driving habits)
Averaged $.0735 per mile with $.118 per kwh cost
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Old 02-10-2009, 08:56 PM
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Zemmo Zemmo is offline
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Default Re: Actual Wh per mile for your vehicle

I have been keeping track of this data every month now for a little while. I have it posted on my website. Here is a direct link to that data.

http://www.electricformula.com/Performance.html
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Old 02-10-2009, 11:02 PM
speculawyer speculawyer is offline
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Default Re: Actual Wh per mile for your vehicle

Quote:
Originally Posted by notnull View Post
Tesla actually quotes 1 cent per mile for their vehicle. What a joke, the average cost of electricity in the US is 12 cents per kWH.
They put an asterisk there and note that the 1 cent per mile is based on Time of Use (TOU) metering wherein you can get cheap electricity in the middle of the night.
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Old 02-11-2009, 04:50 AM
notnull notnull is offline
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Default Re: Actual Wh per mile for your vehicle

Wow, nice info on the Fiero. Best Wh per mile numbers I have seen so far at 388 Wh/mi. I also like the acceleration data, I need to find someone with an Iphone and download that app.

Thanks for publishing your tire data as well, I am going to chang emy tires to an LRR model and see if I can get below 400 Wh/mi.

Steve
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Old 02-11-2009, 06:26 AM
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PatricioIN PatricioIN is offline
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Default Re: Actual Wh per mile for your vehicle

ok.. for yesterday (I just started keeping track of my daily kwh used):

27.7miles - 13kwh to recharge to full

13000/27.7 = 469kwh/m

I pay $.0749/kwh. Elec rates in IN are very low!

13*.0749 = $.97 for 27.7m = $.035/mile

I think that equates to 78mpg based on zemmo's calcs.

One note: I've been going through the paperwork on my charger, and I think I can change the settngs to lower my power consumption. Right now I have it set to charge up to xxxvolts/cell then drop to xxxvolts/cell then float charge indefinately. However, since I drive my EV almost daily, I see no reason to float charge indefinately. I will change that setting and see if it alters my overall usage.

Also, obviously the wh/m figure is better as the weather gets warmer. Luckily, it was about 60 degrees here yesterday.
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Old 02-11-2009, 08:07 AM
notnull notnull is offline
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Default Re: Actual Wh per mile for your vehicle

Good numbers and great utility rates. I pay over twice what you do for power.

I would eventually hope to get to a point where I can tell people the average conversion gets 2 miles (or whatever the number happens to be)per kWh and if you want to know the cost per mile just divide your utility rate per kWh by 2.

Steve
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Old 02-11-2009, 07:51 PM
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Default Re: Actual Wh per mile for your vehicle

Quote:
Originally Posted by notnull View Post
Wow, nice info on the Fiero. Best Wh per mile numbers I have seen so far at 388 Wh/mi. I also like the acceleration data, I need to find someone with an Iphone and download that app.

Thanks for publishing your tire data as well, I am going to chang emy tires to an LRR model and see if I can get below 400 Wh/mi.
Steve
Thanks on the kudos. My Emeter shows a lot less wh/m reading for my mileage. But I think the power from the wall is what everyone should go by. My timer circuit has really helped lower my wh/m, I was doing a lot of over charging (and watering).

Yes LRR tires make a difference, unfortunately my tires are getting worn out. I need to buy new tires, I will probably get new ones soon plus get an alignment.
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