jim0266
Posts: 69
Joined: Fri Mar 17, 2017 10:14 am
Delivery Date: 17 Mar 2017
Leaf Number: 330446
Location: Akron, Oh

Losing SOC *while* L1 charging

Wed Aug 08, 2018 7:58 pm

Scratching my head over this one...

The nice folks at a golf course I play in a league every week allow me to L1 charge during the round. The first time I plugged the car in after my round to see if their plug was good and I watched the SOC decline a few percentage points while monitoring via Leafspy. I called it quits and drove home on my remaining SOC.

The next week I plugged in and and gained about 10-12% while I played.

Tonight when I arrived at the course I was at 33.3% SOC and while getting ready the car charged back to 37%. I unplugged the car and thought I would charge a bit more after the round. Plugging the car in after the round the SOC drop from 37% down to 34% before I unplugged it.

All the lights on the charging unit were good and the light on the dash was blinking normally.

Thanks for any insights.

cwerdna
Posts: 8216
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Losing SOC *while* L1 charging

Wed Aug 08, 2018 11:05 pm

I don't care about the percentages in Leaf Spy. They're of almost no value to me.

I have personally seen the number of gids FALL when charging at 120 volts even though the car is off and I'm not running the AC or heat. All I can guess is that the instrumentation and estimation is a bit wonky, esp. at slow charging speeds.

Of course, when I used to charge for long periods of time at 120 volts (e.g. 8+ hours straight), I have MUCH more SoC per dash display than what I started with.

'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

DaveinOlyWA
Posts: 13212
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Losing SOC *while* L1 charging

Thu Aug 09, 2018 6:44 am

You have LEAF Spy, then you have a power graph that displays "net" power in. That is power to the battery after ALL other accessories are accounted for.
What does the graph say? If you missed the graphs, no problem. download and look at the logs.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 11,987 miles, 485 GIDs, 37.6 kwh 110.89 Ahr , SOH 96.00, Hx 115.22
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jim0266
Posts: 69
Joined: Fri Mar 17, 2017 10:14 am
Delivery Date: 17 Mar 2017
Leaf Number: 330446
Location: Akron, Oh

Re: Losing SOC *while* L1 charging

Thu Aug 09, 2018 9:11 am

Thanks Dave for the idea. Looking at the logs I do see 1000 watts coming in via column EN while L1 charging at the course. While plugged in from 4:35 to 4:45 I went from 63 to 70 GIDS which seems awfully fast for L1. From 7:05 to 7:15 when I plugged back in I went from 70 to 72 GIDS.

DaveinOlyWA
Posts: 13212
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Losing SOC *while* L1 charging

Thu Aug 09, 2018 9:59 am

jim0266 wrote:Thanks Dave for the idea. Looking at the logs I do see 1000 watts coming in via column EN while L1 charging at the course. While plugged in from 4:35 to 4:45 I went from 63 to 70 GIDS which seems awfully fast for L1. From 7:05 to 7:15 when I plugged back in I went from 70 to 72 GIDS.


Perfect example of why daily (or VERY consistent) readings taken over (if not ALL the days owned) time is the only thing that should be referenced.

I take LEAF Spy readings every day (that car is driven) before I go anywhere. I also reset Trip A daily, Trip B monthly. With the 2018, I have a trip computer which helps but still do all the others and have done so daily since I got LEAF Spy for my 2013.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 11,987 miles, 485 GIDs, 37.6 kwh 110.89 Ahr , SOH 96.00, Hx 115.22
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

BrockWI
Posts: 652
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: Losing SOC *while* L1 charging

Thu Aug 09, 2018 2:43 pm

I have seen this happen a bunch of times charging at L1, if you leave it long enough it will start going back up :) I have no idea why sometimes it drops a few percent at the beginning of a charge, but I don't worry about it anymore. I assume it is really putting power in the battery and somehow the car is "calibrating" itself to where the battery really is.
3 kw solar pv - XW6048 - eight L16's
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2003 VW TDI 180k miles - 52 mpg lifetime
evse level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013
@70k miles - 56.56Ahr - 86 SOH - 82.55 Hx - 245 GID

jim0266
Posts: 69
Joined: Fri Mar 17, 2017 10:14 am
Delivery Date: 17 Mar 2017
Leaf Number: 330446
Location: Akron, Oh

Re: Losing SOC *while* L1 charging

Thu Aug 09, 2018 5:56 pm

Thanks for the confirmation Brock. Great stats on your 13 Leaf, btw!

garsh
Posts: 1136
Joined: Sat Feb 12, 2011 5:27 am
Delivery Date: 05 Apr 2012
Location: Pittsburgh PA

Re: Losing SOC *while* L1 charging

Fri Aug 10, 2018 2:09 am

FYI, you will actually lose SOC if the climate control is on during L1 charging.
2012 Black SV, 7 bars, 100,000 miles

LeftieBiker
Posts: 9386
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Losing SOC *while* L1 charging

Fri Aug 10, 2018 3:15 am

garsh wrote:FYI, you will actually lose SOC if the climate control is on during L1 charging.


That applies to heat, but not as likely to A/C unless it's boiling hot outside.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

DaveinOlyWA
Posts: 13212
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Losing SOC *while* L1 charging

Fri Aug 10, 2018 6:47 am

LeftieBiker wrote:
garsh wrote:FYI, you will actually lose SOC if the climate control is on during L1 charging.


That applies to heat, but not as likely to A/C unless it's boiling hot outside.


AC generally starts out at 2500+ watts. The other day when it was 101.3º, it actually took a good 10-15 mins before it dropped below 1500 watts. Had never seen that before. Normally I am under 500 watts in less than 5.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 11,987 miles, 485 GIDs, 37.6 kwh 110.89 Ahr , SOH 96.00, Hx 115.22
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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