User avatar
IssacZachary
Posts: 881
Joined: Fri Jan 13, 2017 9:57 am
Delivery Date: 15 Nov 2016
Leaf Number: 420789
Location: Gunnison, CO, USA

Re: Charge a little each day, or longer charges every few days?

Mon Jul 23, 2018 3:00 pm

Silverfish wrote:So what does the GID number mean?
GID stands for "Gee, I don't..." know. Just kidding.

The GID is a unit of energy. If you multipy it by about 0.08 you get your capacity in kWh.

What is a "Gid"? - My Nissan Leaf Forum
2013 SL SOLD :cry:
2013 Toyota Avalon Hybrid CURRENT

cwerdna
Posts: 9682
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Charge a little each day, or longer charges every few days?

Tue Jul 24, 2018 12:45 am

Silverfish wrote: So what does the GID number mean?
Sorry for the history lesson, hopefully I'm accurate on gid history as I didn't have a Leaf until July 2013 but had test driven as far back Nov 2010, before they went on sale.

'11 and '12 Leaf never had a % state of charge display. It only had the crappy GOM and 12 fuel bars. Then (AFAIK), the user garygid discovered a value (http://www.electricvehiclewiki.com/Glossary) that others named in his honor: gid. It was discovered that a new 24 kWh Leaf fully charged had about 281 gids (http://www.mynissanleaf.com/viewtopic.php?f=44&t=5582) and the value went down as the battery discharged. People used this as a proxy for % state of charge since it's FAR more granular than the 12 fuel bars and is a lot better than the black box algorithm GOM that sucks.

The original gid meter (SOC meter) was http://www.wwwsite.com/puzzles/socmeter/. You can see what they look like at https://saxton.org/tom_saxton/2012/01/l ... build.html. I've seen them myself. Garygid is mentioned at https://www.nytimes.com/2011/10/16/auto ... alone.html.

At a meeting in late 2011 at Google (I was in attendence) where the gen 1 Leaf's Chief Vehicle Engineer (Kadota-san) + Mark Perry + Nissan's quality guy + some engineers from Japan (see recap starting from http://www.mynissanleaf.com/viewtopic.p ... 61#p155461) were present, folks implored Nissan to add % SoC display, besides showing them some other mods (e.g. gid meter, turbine engine tow generator, etc.) and making some other requests.

Nissan listened on a bunch of the asks. % SoC display got added to '13 Leafs.

Other devices to read gids + other info also came along (e.g. LeafDD: viewtopic.php?f=44&t=12561, WattsLeft: http://www.mynissanleaf.com/viewtopic.php?f=44&t=8527).

Gids were also helpful to use with Tony's range charts (esp. on aforementioned '11 and '12 Leafs w/crap instrumentation): http://www.mynissanleaf.com/viewtopic.php?t=4295.

The default in Leaf Spy settings is 77.5 watt-hours per gid. See http://www.mynissanleaf.com/viewtopic.p ... 62#p523862 for caveats, including straight from Leaf Spy author himself, Turbo3.

Also, as the battery degrades, the # of max gids on a 100% charge (per dash display and when car stops when full) goes down. My 11 bar Leaf only gets up to mid to high 230s or low 240s gids on a full charge.

Nissan has AFAIK never released any documentation on nor publicly acknowledged any of the values that Leaf Spy can render. We have no idea of their accuracy, caveats, conditions which are required for them to be accurate (if that exists), etc. I've posted my thoughts on values that people commonly look at in Leaf Spy at http://mynissanleaf.com/viewtopic.php?p=510091#p510091.

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

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

be236
Posts: 79
Joined: Sun Jul 15, 2018 9:13 pm
Delivery Date: 07 Jul 2018
Leaf Number: 309258
Location: Seattle, WA

Re: Charge a little each day, or longer charges every few days?

Tue Jul 24, 2018 6:34 am

cwerdna wrote:
Silverfish wrote: So what does the GID number mean?
Sorry for the history lesson, hopefully I'm accurate on gid history as I didn't have a Leaf until July 2013 but had test driven as far back Nov 2010, before they went on sale.

'11 and '12 Leaf never had a % state of charge display. It only had the crappy GOM and 12 fuel bars. Then (AFAIK), the user garygid discovered a value (http://www.electricvehiclewiki.com/Glossary) that others named in his honor: gid. It was discovered that a new 24 kWh Leaf fully charged had about 281 gids (http://www.mynissanleaf.com/viewtopic.php?f=44&t=5582) and the value went down as the battery discharged. People used this as a proxy for % state of charge since it's FAR more granular than the 12 fuel bars and is a lot better than the black box algorithm GOM that sucks.

The original gid meter (SOC meter) was http://www.wwwsite.com/puzzles/socmeter/. You can see what they look like at https://saxton.org/tom_saxton/2012/01/l ... build.html. I've seen them myself. Garygid is mentioned at https://www.nytimes.com/2011/10/16/auto ... alone.html.

At a meeting in late 2011 at Google (I was in attendence) where the gen 1 Leaf's Chief Vehicle Engineer (Kadota-san) + Mark Perry + Nissan's quality guy + some engineers from Japan (see recap starting from http://www.mynissanleaf.com/viewtopic.p ... 61#p155461) were present, folks implored Nissan to add % SoC display, besides showing them some other mods (e.g. gid meter, turbine engine tow generator, etc.) and making some other requests.

Nissan listened on a bunch of the asks. % SoC display got added to '13 Leafs.

Other devices to read gids + other info also came along (e.g. LeafDD: viewtopic.php?f=44&t=12561, WattsLeft: http://www.mynissanleaf.com/viewtopic.php?f=44&t=8527).

Gids were also helpful to use with Tony's range charts (esp. on aforementioned '11 and '12 Leafs w/crap instrumentation): http://www.mynissanleaf.com/viewtopic.php?t=4295.

The default in Leaf Spy settings is 77.5 watt-hours per gid. See http://www.mynissanleaf.com/viewtopic.p ... 62#p523862 for caveats, including straight from Leaf Spy author himself, Turbo3.

Also, as the battery degrades, the # of max gids on a 100% charge (per dash display and when car stops when full) goes down. My 11 bar Leaf only gets up to mid to high 230s or low 240s gids on a full charge.

Nissan has AFAIK never released any documentation on nor publicly acknowledged any of the values that Leaf Spy can render. We have no idea of their accuracy, caveats, conditions which are required for them to be accurate (if that exists), etc. I've posted my thoughts on values that people commonly look at in Leaf Spy at http://mynissanleaf.com/viewtopic.php?p=510091#p510091.
Wow, cool explanation with history background! Great info (I always wonder what GID was about as it's listed prominently in LeafSpy. Thanks!
Nissan LEAF 2017 S.

Silverfish
Posts: 29
Joined: Thu Jun 21, 2018 10:32 am
Delivery Date: 21 Jun 2018

Re: Charge a little each day, or longer charges every few days?

Tue Jul 24, 2018 12:02 pm

cwerdna wrote:
Silverfish wrote: So what does the GID number mean?
Sorry for the history lesson, hopefully I'm accurate on gid history as I didn't have a Leaf until July 2013 but had test driven as far back Nov 2010, before they went on sale.

'11 and '12 Leaf never had a % state of charge display. It only had the crappy GOM and 12 fuel bars. Then (AFAIK), the user garygid discovered a value (http://www.electricvehiclewiki.com/Glossary) that others named in his honor: gid. It was discovered that a new 24 kWh Leaf fully charged had about 281 gids (http://www.mynissanleaf.com/viewtopic.php?f=44&t=5582) and the value went down as the battery discharged. People used this as a proxy for % state of charge since it's FAR more granular than the 12 fuel bars and is a lot better than the black box algorithm GOM that sucks.

The original gid meter (SOC meter) was http://www.wwwsite.com/puzzles/socmeter/. You can see what they look like at https://saxton.org/tom_saxton/2012/01/l ... build.html. I've seen them myself. Garygid is mentioned at https://www.nytimes.com/2011/10/16/auto ... alone.html.

At a meeting in late 2011 at Google (I was in attendence) where the gen 1 Leaf's Chief Vehicle Engineer (Kadota-san) + Mark Perry + Nissan's quality guy + some engineers from Japan (see recap starting from http://www.mynissanleaf.com/viewtopic.p ... 61#p155461) were present, folks implored Nissan to add % SoC display, besides showing them some other mods (e.g. gid meter, turbine engine tow generator, etc.) and making some other requests.

Nissan listened on a bunch of the asks. % SoC display got added to '13 Leafs.

Other devices to read gids + other info also came along (e.g. LeafDD: viewtopic.php?f=44&t=12561, WattsLeft: http://www.mynissanleaf.com/viewtopic.php?f=44&t=8527).

Gids were also helpful to use with Tony's range charts (esp. on aforementioned '11 and '12 Leafs w/crap instrumentation): http://www.mynissanleaf.com/viewtopic.php?t=4295.

The default in Leaf Spy settings is 77.5 watt-hours per gid. See http://www.mynissanleaf.com/viewtopic.p ... 62#p523862 for caveats, including straight from Leaf Spy author himself, Turbo3.

Also, as the battery degrades, the # of max gids on a 100% charge (per dash display and when car stops when full) goes down. My 11 bar Leaf only gets up to mid to high 230s or low 240s gids on a full charge.

Nissan has AFAIK never released any documentation on nor publicly acknowledged any of the values that Leaf Spy can render. We have no idea of their accuracy, caveats, conditions which are required for them to be accurate (if that exists), etc. I've posted my thoughts on values that people commonly look at in Leaf Spy at http://mynissanleaf.com/viewtopic.php?p=510091#p510091.
Thanks, cwerdna. That was quite interesting. It looks like my car's max GIDs at 100% is currently around 215. That suggests that my battery retains about 76.5% of its original capacity, which is about what I thought.

WetEV
Posts: 3058
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Charge a little each day, or longer charges every few days?

Tue Jul 24, 2018 10:25 pm

Silverfish wrote:It looks like my car's max GIDs at 100% is currently around 215. That suggests that my battery retains about 76.5% of its original capacity, which is about what I thought.
Just a warning that the BMS GID and other values are not accurate to less than 1%. More like +/- 3% at best, and even less accurate if you do frequent DCQCs. So it might be best to say about 76%.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red
2019 eTron Blue

Silverfish
Posts: 29
Joined: Thu Jun 21, 2018 10:32 am
Delivery Date: 21 Jun 2018

Re: Charge a little each day, or longer charges every few days?

Tue Jul 24, 2018 10:30 pm

WetEV wrote:
Silverfish wrote:It looks like my car's max GIDs at 100% is currently around 215. That suggests that my battery retains about 76.5% of its original capacity, which is about what I thought.
Just a warning that the BMS GID and other values are not accurate to less than 1%. More like +/- 3% at best, and even less accurate if you do frequent DCQCs. So it might be best to say about 76%.
Good to know. Thanks.

sptleaf
Posts: 20
Joined: Sun Feb 17, 2019 10:57 pm
Delivery Date: 18 Feb 2019
Location: San Diego

Re: Charge a little each day, or longer charges every few days?

Tue Feb 26, 2019 10:32 pm

New Leaf owner here with a 2019 Leaf S. I have a 60 mile commute and my range meter usually shows 150-180 miles fully charged (which i love by the way). Should I charge daily from 60-70% to 100% or skip a day, get down to 20-30% and then full charge to 100%? Or, mix it up to get a variety? If I have a 4 day weekend, should I just leave it at 60-80% instead of at 100% charge if that fits my drive profile? I know it's not good to spend a lot of time at the very high end or the very low end but I read sometimes a full charge is good to balance the cells. I'm tempted just to use it and not worry about all this, but I wanted to see what you experienced Leaf owners thought was best for battery longevity. Thanks.

LeftieBiker
Moderator
Posts: 13018
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Charge a little each day, or longer charges every few days?

Tue Feb 26, 2019 10:43 pm

Should I charge daily from 60-70% to 100% or skip a day, get down to 20-30% and then full charge to 100%? Or, mix it up to get a variety?
Try to keep the state of charge (SOC) above 20% and below 80%, unless you actually need a full charge. In that case set a timer to end charging at 100% shortly before using the car. Lithium batteries don't like sitting at 100% SOC.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

zmountin
Posts: 4
Joined: Wed Jun 05, 2019 8:37 am
Delivery Date: 31 May 2019

Re: Charge a little each day, or longer charges every few days?

Wed Jun 12, 2019 10:41 am

LeftieBiker wrote:
Should I charge daily from 60-70% to 100% or skip a day, get down to 20-30% and then full charge to 100%? Or, mix it up to get a variety?
Try to keep the state of charge (SOC) above 20% and below 80%, unless you actually need a full charge. In that case set a timer to end charging at 100% shortly before using the car. Lithium batteries don't like sitting at 100% SOC.

I'm a new Leaf Plus owner, and have a daily commute of about 60 miles round trip. There is one L2 at work that has some problems with availability or trickle charge at home.

Based on this, should I only charge to 80% at work, and then drive home? Or, if I know that I'm about to drive the 30 miles, is it ok to charge it close to 100%, since the drive home should knock it back down to around 80%?

And, what are the ethics/norms of using shared charging stations? Is it more socially acceptable for me to only use the L2 at work every 3 days or so, but sit on the charger for the bulk of the day, or charge more frequently for a shorter period of time. If I notice that the charger is being unused in the afternoon, should I plug in for a few hours, even if I'm only at 70% so that I don't need a longer charge the next time?

LeftieBiker
Moderator
Posts: 13018
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Charge a little each day, or longer charges every few days?

Wed Jun 12, 2019 10:48 am

Try to use the charging station (the actual charger is built into the car) when it isn't in heavy use. You can either charge to 100% or near it right before leaving for home, or every day to 80%, depending on availability. I suggest you speak with the other EV drivers at work, and try to come up with a schedule that works for everyone. You also should really have at least L-1 charging available at home. That requires only a good, unused or used only by a light or two circuit, 15-20 amp.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Return to “Range / Efficiency / Carwings”