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Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Sat Jun 04, 2011 12:16 pm
by thankyouOB
agree. Blink web-based data is woeful, not providing good tables, and inaccurate.
Blink itself is reliable on data, I find.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Wed Jun 08, 2011 12:39 pm
by DeaneG
Interesting to see that wall-to-wheel efficiency is about 0.8 of that reported by the Leaf. I imagine that's the charging efficiency figure rather than some misreporting on the part of the car.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Thu Jun 09, 2011 4:02 pm
by rmay635703
DeaneG wrote:Interesting to see that wall-to-wheel efficiency is about 0.8 of that reported by the Leaf. I imagine that's the charging efficiency figure rather than some misreporting on the part of the car.
The charger isn't perfectly efficient and the batteries aren't either.

Those figures multiply against one another

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Sun Jun 26, 2011 1:24 pm
by wishboneash
My data is highly skewed because I got Blnk installed a week or so after I got the car and I also charge the car at work occassionally. So my kWhr usage is probably more complete from CARWINGS. Over time, all my home charging costs will become more accurate since I don't charge off 120V at home any more.

a. Tot miles = 1069
b. kWhr (Blnk) = 104.3
c. Miles/kWhr (Blnk) = 10.2
d. Miles/kWhr (Leaf) = 5.0
e. Miles/kWhr (CW) = 6.4
f. $ spent (Blnk) = $9.08
g. cents/mile = 0.85

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Sun Jun 26, 2011 3:17 pm
by Boomer23
wishboneash wrote:My data is highly skewed because I got Blnk installed a week or so after I got the car and I also charge the car at work occassionally. So my kWhr usage is probably more complete from CARWINGS. Over time, all my home charging costs will become more accurate since I don't charge off 120V at home any more.
Can you recalculate your mi/kwh from the Blink, correcting by adding the kWh that you used by charging at work? Otherwise, as you say, this data is highly skewed.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Sun Jun 26, 2011 3:20 pm
by evnow
wishboneash wrote:d. Miles/kWhr (Leaf) = 5.0
This is the only useful number there - since rest of it is incomplete and misleading. It is a good number.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Mon Jun 27, 2011 1:49 pm
by wishboneash
I agree that my numbers are skewed and misleading but this is true for anyone getting free charging at work etc. The reality is what I am paying for charging at home. If Carwings could include GPS location info where I charged and I could download that, and it would help me to come up with a more accurate number for kWhrs charged at work and other locations. The true cost of charging and therefore c/mile would be impossible (whether free or not) since I don't know what the company pays for its electric rates. The only accurate number is the kWhrs/mile and hopefully Carwings can fix that soon.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Mon Jun 27, 2011 3:27 pm
by DaveinOlyWA
My take; if it ain't coming out of my pocket ...

Me being the data hog that I am might try to track both sets of numbers but would do it only to determine how much more I saved by plugging in at work

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Mon Jun 27, 2011 3:44 pm
by cdub
I've been averaging 4miles/kw.

Re: I Beat EPA's 2.9 Miles/KWh : Report Your Monthly Mileage

Posted: Mon Jun 27, 2011 7:43 pm
by ttweed
Posted this elsewhere, but just saw this thread. After my first full month on TOU service with a separate meter I was finally able to see exact energy usage. We went 1216 miles in 33 days (May 7 to June 9) on 336 kWh of energy (all charging at home w/ the Blink EVSE). That comes out to 3.619 m/kWh drawn from the wall. It cost me $24.06 (100% super off-peak charging at about $.07/kWh), or 1.9786 cents per mile for fuel. Carwings says we are averaging 6.3 m/kWh over 2840 total miles so far, BTW. We drive it almost all the time in Eco mode and charge to 80% to maximize regen. We probably do less than 50% freeway driving, but when on the freeway, drive at 65-70mph. We haven't had to use AC much yet (maybe 20% of the time) or heat at all.

TT