Monthly OnStar Report for June 2011 - Ford Focus Electric Forum
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Old 06-28-2011, 07:59 AM   #1 (permalink)
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Default Monthly OnStar Report for June 2011

Electric Consumption: 27 kW-hr/100 miles


Electric Miles: 1,542
Gas Miles: 115
Total Miles: 1,657
Percentage on Electric: 93 %
Estimated Gallons of Fuel Saved: 62 gal

Another month averaging 27kwh/100 miles. So that 1542 electric miles cost me $42.88. Alot better than the ~$270 I would have paid driving around the old Nissan Pathfinder.

Interesting to note that Volt is rated to use 36kwh/100 miles by the EPA. Highest I have seen is 34.



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Old 06-28-2011, 12:43 PM   #2 (permalink)
 
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Default Re: Monthly OnStar Report for June 2011

Even though your Volt is not a Ford Focus Electric, I welcome your posts about your experience. Thanks!
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Old 06-29-2011, 03:34 PM   #3 (permalink)
 
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Default Re: Monthly OnStar Report for June 2011

Hmmm

I am a little suspicious of our 27kWh/100mi number. Is that from the actual meter reading to charge the battery or just what OnStar says? The LEAF forums put the charge at 24kWh to get 21kWh into a fully depleted battery. Meaning for the 80mi range you get around 300W/mi (or 30kWh/100mi in your units). If your numbers is accurate then maybe there is a good case for the battery conditioning that the Volt uses.

Even using your efficiency I get a 25% higher cost using my electric rate:
Code:
(1427mi * .27kWh/mi * .11$/mi) $42.38 electric + (115/32mpg * 3.8 $/gal) $13.65 gas = $56
Using numbers from the LEAF bloags it comes out only a little cheaper:
Code:
1542mi * .3kWh/mi * .11$/kWh = $50
My Prius gets over 48mpg, which puts the cost of 1542mi at $122. While $72 isn't chump change, I don't think a Volt or LEAF are going to beat a Prius in cost over the term of a typical car loan. Energy independence and cleaner air are still going to be my main reasons to be an early adopter...
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Old 06-29-2011, 08:36 PM   #4 (permalink)
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Default Re: Monthly OnStar Report for June 2011

Quote:
Originally Posted by FocusSkeptic
Hmmm

I am a little suspicious of our 27kWh/100mi number. Is that from the actual meter reading to charge the battery or just what OnStar says? The LEAF forums put the charge at 24kWh to get 21kWh into a fully depleted battery. Meaning for the 80mi range you get around 300W/mi (or 30kWh/100mi in your units). If your numbers is accurate then maybe there is a good case for the battery conditioning that the Volt uses.

Even using your efficiency I get a 25% higher cost using my electric rate:
Code:
(1427mi * .27kWh/mi * .11$/mi) $42.38 electric + (115/32mpg * 3.8 $/gal) $13.65 gas = $56
Using numbers from the LEAF bloags it comes out only a little cheaper:
Code:
1542mi * .3kWh/mi * .11$/kWh = $50
My Prius gets over 48mpg, which puts the cost of 1542mi at $122. While $72 isn't chump change, I don't think a Volt or LEAF are going to beat a Prius in cost over the term of a typical car loan. Energy independence and cleaner air are still going to be my main reasons to be an early adopter...
FS it is a fair question. Do not know if OnStar is counting just the what the car "burns" or what the actual energy used at the EVSE during recharge. I think the latter. I have tested when it was colder and I was recharging and it calculated out to about 12.5kw. But now that it is warmer it seems to take less energy to charge.

What users are reporting on other sites is 13k-10k per ~40 mile charge. This was confirmed by Dianne Corsello at Dominion Power here:

viewtopic.php?f=10&t=407

They have only been charging since April and their numbers have been closer to 10kw/charge.

But you raise a good point, does the thermal system on the Volt significantly help increase the efficiency during recharging, and for that matter what about battery longevity from recharging?



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Old 06-30-2011, 02:08 AM   #5 (permalink)
 
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Default Re: Monthly OnStar Report for June 2011

Charged Up said
Quote:
I have tested when it was colder and I was recharging and it calculated out to about 12.5kw
Well maybe it is a unit issue. 12.5kW/40mi would be 312.5Wh/mi (31kWh/100mi) if the 12.5 was kWh.
10k to 13k per 40mi is 250-325Wh/mi which is trending better than the LEAF numbers but not far off.
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