DaveinOlyWA
Posts: 15310
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 6:26 am

there maybe other KAWs out there, but mine is only good for 120 volt for current measurement. i have had it near 15 amps before but only briefly. have been up to 1714 watts before. i know this because i took a picture of it once and saw that. did not notice it when i took the pic so dont know how long it had been that high. i normally see it in the 1300-1400 range.

but either way. so far total miles 68, total K's 23.19 so just under 3 mpk. now that is wall to wheels. i really dont care about anything else, since that is "MY" cost.

with connection charge, taxes, etc my cost is around 10.2 cents/kwh. so i am just over 3 cents a mile so far. but the real numbers start now. just as the first tank from the dealer on my Prius was short. this one will be as well. as long as i was at the dealer, i should have plugged in but did not think of it at the time. oh well. but now i am full and we shall see what happens now.

i am beginning to think that charging efficiency is not going to be so good. to test, i will not be preheating (its about 37º outside, around 47 inside my garage so it will be a bit of a sacrifice!!) so i can get a better idea of the efficiency to wheels from battery.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 9:12 am

Had an almost 2 minute power outage last night (around 5:30 per my UPS status report) after the car was fully charged. At 7:30 all blue lights on the dash were off. Is it normal that they go off once (or a while after) reaching 100% charge ? Or should they stay on until you unplug ?
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

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Spies
Posts: 837
Joined: Sat Jul 31, 2010 8:22 am
Delivery Date: 10 Jan 2011
Leaf Number: 0255
Location: Foster City, CA

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 9:58 am

LEAFer wrote:Is it normal that they go off once (or a while after) reaching 100% charge ? Or should they stay on until you unplug ?
From page CH-26 of the manual:
When fully charged
All of the indicator lights 1 to 3 illuminate when:
. The Li-ion battery is fully charged
. 80% of a charging timer is completed
. When 90% of a quick charge is completed
The indicator lights turn off after approximately 15 minutes or when the charge connector is removed.
Green Honda EV Plus 02/1998-12/2003 plate "ZERO CO2" rip, Aptera 2e #726 canceled
Blue Nissan Leaf SL loaded reserved 04/20/2010 ordered 08/31/2010 EVSE Blink #182
CARWINGS Nickname Theres233, should be Spies

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LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 10:13 am

Thanks. I will pick up a manual (or the PDF) one of these days :lol:
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

DaveinOlyWA
Posts: 15310
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 1:06 pm

Ok I did not read the manual since I never do but I was guessing with the last light blinking we were charging the last 20%. Knowing u r at 90% is good to know..
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Thu Jan 20, 2011 11:50 pm

Not so sure ... because it says QUICK CHARGE ... the final blue light indicates at 90% as opposed to 100%. For normal charge (L1 & L2) I assume that means the final blue light is still blinking anywhere from 67% - 99%. Unless you are using a timer, in which case that final 3rd light turns solid at 80% (and probably blinks between 67%-79%, but that's a guess).

(Kind of confusing ... I'd rather not see a difference for indicators between timed- and un-timed charging.)
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

DaveinOlyWA
Posts: 15310
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Sat Jan 22, 2011 6:41 am

just an update; yesterdays commute 20.3 miles, recharged 6.18 kwh, mpk 3.28

scenario; normal commute with short detour. all at 40 mph or less. temps mid 40's. based on a 19.2 kwh pack and my estimated 106 mile range which would imply a mpk from pack to wheels of 5.52 mpk

if using 90% then that is 4.90 mpk.

that leaves a pretty pathetic charging efficiency (obtw, the plug uses about 10 watts while plugged into nothing)

so am i missing something? will continue to monitor...obtw, carwings not working, should have it fixed today at Olympia Dealer. that should give me more to work with.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

GroundLoop
Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Sat Jan 22, 2011 11:36 am

leafme wrote: This 33% (67% savings) is based on regular gas at $3.10/g, a mpg of 45, the LEAF costing 0.0227 $/mi at a super off-peak tariff rate of 0.075 $/kwh (midnight to 5am, 0000-0500 hrs, for SDG&E).
Of course, if you figure the cost of a 36mo/12k lease is about $0.50 a mile, then you might as well get out of the slow lane and drive it like bodengroden's wife.
:twisted:

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planet4ever
Posts: 4674
Joined: Sat Apr 03, 2010 9:53 pm
Delivery Date: 02 May 2011
Leaf Number: 1537
Location: Morgan Hill, CA, south of San Jose

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Sat Jan 22, 2011 2:08 pm

DaveinOlyWA wrote:based on a 19.2 kwh pack and my estimated 106 mile range which would imply a mpk from pack to wheels of 5.52 mpk
I believe that is a misconception. It seems to be pretty well established that the total usable capacity of the battery is about 24 kWh, although that does work out to about 19.2 kWh for 80%, or, if you prefer, from 10% to 90%. But you don't charge between 10% and 90% of usable capacity. The 106 mile estimate is from wherever you are (presumably 100%) down to 0%. It is how far the computer thinks you may be able to go if you run the car down past the Low Battery warnings, down past the heat/AC power limitation, down past the turtle mode, until it finally comes to a stop. i.e. it is how far you can go on 24 kWh, not 19.2 kWh.

Using that basis, the computer is saying that battery to wheels will be 4.42 mpk. You got 3.28 mpk wall to wheels, which is only about 75% efficiency. Still very bad, though not as bad as you thought. However, you shouldn't assume this is all charging system inefficiency. Some of it is probably due to incorrect estimation in the computer program that is trying to guess how well you will drive before you start your day's trip. Also, with temps in the mid 40s weren't you using the heater? Surely that 106 mile range was their estimate with climate control off.
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

DaveinOlyWA
Posts: 15310
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Miles per kwh so far... my calcs vs. the LEAFs calcs

Sat Jan 22, 2011 2:54 pm

Well then if we assume that the estimate is based in the entire 24 kwh then we are still over 5 over 5 miles per kwh
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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