LeftieBiker
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Location: Upstate New York, US

Re: Leaf needed to Jumpstart frequently

Thu Sep 19, 2019 1:55 pm

I have left my 2015 LeafS unplugged, outdoors, in Texas heat, for 5 weeks, for 4 consecutive years. Upon my return, car has started and run normally without issues. State of charge? Once was at 100%, 3 times 50-60%.

Beginning in either 2014 or 2015, the 12 volt charging algorithm was improved. 12 volt battery issues are mainly found with pre-'14 Leafs.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

DaveinOlyWA
Posts: 14164
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Leaf needed to Jumpstart frequently

Thu Sep 19, 2019 2:01 pm

LeftieBiker wrote:
Thu Sep 19, 2019 1:55 pm
I have left my 2015 LeafS unplugged, outdoors, in Texas heat, for 5 weeks, for 4 consecutive years. Upon my return, car has started and run normally without issues. State of charge? Once was at 100%, 3 times 50-60%.

Beginning in either 2014 or 2015, the 12 volt charging algorithm was improved. 12 volt battery issues are mainly found with pre-'14 Leafs.
Improved, yes. Rumor has it, system now kicks in every 48 hours to boost 12 volt as opposed to the previous 5 day intervals but the system is still not aware of 12 volt battery status so the 12 volt will still go dangerously low.

Twice I stumbled upon my car boosting my 12 volt (noticed because only center charging light flashes) after barely more than 24 hours of inactivity but voltage checks did not seem to indicate the shorter interval was due to a dangerously low voltage. I see 12.1 volts give or take all the time. Car still starts with that but its a bit too close for my tastes.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 25,185 miles SOH 92.23%
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LeftieBiker
Moderator
Posts: 13307
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Location: Upstate New York, US

Re: Leaf needed to Jumpstart frequently

Thu Sep 19, 2019 5:14 pm

I see 12.1 volts give or take all the time. Car still starts with that but its a bit too close for my tastes.

Indeed it is. I'll have to check mine.
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.

nlspace
Posts: 69
Joined: Mon Jun 05, 2017 10:21 pm
Delivery Date: 06 Jun 2017

Re: Leaf needed to Jumpstart frequently

Thu Sep 19, 2019 8:08 pm

@raj

i have been troubleshooting a similar starting issue, and unless you have kept your 12-volt battery topped up with a battery tending device, it is bad and will need to be replaced to get the car running as it should.

There is a 12V battery discussion on this forum here: viewtopic.php?t=22030#p462017

You may have searched for this info, but the search engine here ignores the word "battery".

Good Luck to you,
kenny

raj1234
Posts: 3
Joined: Wed Sep 18, 2019 8:46 am
Delivery Date: 18 Sep 2015

Re: Leaf needed to Jumpstart frequently

Fri Sep 20, 2019 7:43 am

The Issue got resolved. The Issue was that there was a loose connection with the wire connecting to 12V battery, once that is fixed its working fine. Thank you all for taking your time in trying to help.

DaveinOlyWA
Posts: 14164
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Leaf needed to Jumpstart frequently

Fri Sep 20, 2019 8:04 am

nlspace wrote:
Thu Sep 19, 2019 8:08 pm
@raj

i have been troubleshooting a similar starting issue, and unless you have kept your 12-volt battery topped up with a battery tending device, it is bad and will need to be replaced to get the car running as it should.

There is a 12V battery discussion on this forum here: viewtopic.php?t=22030#p462017

You may have searched for this info, but the search engine here ignores the word "battery".

Good Luck to you,
kenny
I have no issues starting (knock on wood) but at the same time when the weather changes, I put my battery on a charger for a few hours every month or so. I don't do anything in Summer. I am lazy in that I don't disconnect battery from car. Connect red to pos terminal of battery and black to ground.


I probably should disconnect battery completely and run overnight charge on it...
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 25,185 miles SOH 92.23%
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

gncndad
Posts: 142
Joined: Mon Feb 22, 2016 9:02 pm
Delivery Date: 23 Feb 2016
Location: Ft. Worth, TX

Re: Leaf needed to Jumpstart frequently

Fri Sep 20, 2019 8:23 am

DaveinOlyWA wrote:
Fri Sep 20, 2019 8:04 am
nlspace wrote:
Thu Sep 19, 2019 8:08 pm
@raj
I have no issues starting (knock on wood) but at the same time when the weather changes, I put my battery on a charger for a few hours every month or so. I don't do anything in Summer. I am lazy in that I don't disconnect battery from car. Connect red to pos terminal of battery and black to ground.


I probably should disconnect battery completely and run overnight charge on it...
...or...attach leads to the battery, run the wire forward through the charge port, and plug in a BatteryTenderPlus periodically. Simple.

Even with periodic charging, my OEM 12V went bad after 4 years (TX heat). Hopefully the Bosch AGM will last longer, but who knows?
2015 LeafS
2013 Ford Cmax
2014 Toyota Avalon Hybrid Limited
2017 Ford Fusion Hybrid Energi

gncndad
Posts: 142
Joined: Mon Feb 22, 2016 9:02 pm
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Location: Ft. Worth, TX

Re: Leaf needed to Jumpstart frequently

Sun Sep 22, 2019 1:37 pm

Single data point: 9 month old Bosch AGM, TX heat, car sat undriven for 5 weeks in July/Aug. Mostly short trips, always charging main battery to 100% overnight.

Just put the 12V on the BatteryTenderPlus (ambient 85f). It showed 80% charged after 1.5 hours, fully charged after 4 hours. This is MUCH better than the OEM, which consistantly took over 14 hours to fully charge.

YMMV.
2015 LeafS
2013 Ford Cmax
2014 Toyota Avalon Hybrid Limited
2017 Ford Fusion Hybrid Energi

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Nubo
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Re: Leaf needed to Jumpstart frequently

Sun Sep 22, 2019 11:16 pm

gncndad wrote:
Sun Sep 22, 2019 1:37 pm
Single data point: 9 month old Bosch AGM, TX heat, car sat undriven for 5 weeks in July/Aug. Mostly short trips, always charging main battery to 100% overnight.

Just put the 12V on the BatteryTenderPlus (ambient 85f). It showed 80% charged after 1.5 hours, fully charged after 4 hours. This is MUCH better than the OEM, which consistantly took over 14 hours to fully charge.

YMMV.
One advantage of AGM is faster charge acceptance. The electrolyte is more highly concentrated, which gives the batery a lower internal resistance.
I noticed you're still working with polymers.

gncndad
Posts: 142
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Re: Leaf needed to Jumpstart frequently

Mon Sep 23, 2019 3:31 pm

Nubo wrote:
Sun Sep 22, 2019 11:16 pm
One advantage of AGM is faster charge acceptance. The electrolyte is more highly concentrated, which gives the batery a lower internal resistance.
Thanks for the clarification. So,the quicker charge isn't necessarily an indication of battery integrity/health?

Just had OEM 12V battery replaced in our 2017 FusionEnergi (29k miles). They replaced it under CPO, with a normal lead acid 12v battery. After 4 weeks of daily use, including plenty of highway miles, BatteryTenderPlus took around 20 hours to reach a full charge.
2015 LeafS
2013 Ford Cmax
2014 Toyota Avalon Hybrid Limited
2017 Ford Fusion Hybrid Energi

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