NessieLeaf
Posts: 2
Joined: Sun Nov 05, 2017 11:12 am
Delivery Date: 05 Nov 2014

Re: 12v battery dies overnight

Mon Nov 06, 2017 11:24 am

I'm having the same issue with my 2015 SL Leaf. This problem never occured prior to the 2G-3G TCU upgrade. After owning the vehicle for just shy of 3 yrs the warning light came on while I was driving and then the 12v died overnight while charging. The dealer replaced the 12v. The problem returned within a couple weeks. Then the dealer replaced the 3G TCU. The problem returned within a couple weeks. The dealer could not repeat the problem in the shop. They asked me to bring my EVSE charger in. I have a EVSEUPGADE.COM 240v modified Nissan (Panasonic) 4.8kw charger. I've been using the charger for almost 3 years with no problems. I bring the charger to the Nissan dealer and then they did nothing more, told me it wasn't a warranty issue and tried to charge me for the diagnostic work, even though they never tested the charger or even plugged it into the Leaf. Considering that an owner may use a variety of chargers from many different mftrs, I feel they are just looking for an excuse not to resolve the problem. I don't believe it is the charger due to the randomness of the issue. After getting the car back from the dealer I charged overnight with the same charger and had no problem. I'm no longer in warranty and the problem has not resolved itself.

It seems like the 12 volt just slowly drains. The warning light comes on after charging overnight then goes off later in the day after driving and then restarting the Leaf. This will happen for a couple days and then the 12v will be dead and not open doors, etc. That should never happen since it should disconnect loads when the 12v gets too low and the onboard DC-DC charger should be maintaining the 12v. The dealer tech (the dealer has only one) had Nissan involved with the issue so at this point I feel that Nissan doesn't have a clue to what's going on. I'm seeing several threads regarding this issue and lots of Leaf owners looking for work-arounds which tells me there is a faulty component or firmware issue that has not been addressed by Nissan.

I wonder how many Leafs are affected by this? Perhaps a class action suit is needed to get resolution. Does anyone know of a permanent fix to the draining 12v issue?

LeftieBiker
Posts: 7402
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12v battery dies overnight 2013 S

Mon Nov 06, 2017 1:02 pm

There is no permanent fix as of yet, just a bandaid: install a higher capacity AGM or deep cycle battery and charge it externally at least once a week.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

Neptuneninja0
Posts: 5
Joined: Sun Jul 23, 2017 7:36 am
Delivery Date: 30 Jan 2017

Re: 12v battery dies overnight 2013 S

Thu Nov 09, 2017 7:20 am

I installed an AGM deep cycle (i'm told was designed for a wheelchair). I bought a $20 charger off Amazon (2A). Here is where my results get silly:

The factory battery that I removed absorbed very little energy when I charged it outside the car. It had sulfuric acid all over it so whatever that means, maybe the leaf had at one point tried to overcharge it.

The NEW battery runs well. Yet, when I run the new charger over night, the damned thing never stops charging. The AGM is only rated on the sticker for 35Ah. the formula in the charger's manual says even at very low state-of-charge, my battery should be full in 21 hours.

I have used this charger for two separate cars and their batteries while mounted in their cars and the charge eventually floats. So I know the charger functions.

There is something wrong with the leaf in that I can plug in the external charger overnight WITHOUT the ESVE attached and the device never reaches a float.

A question for LeftieBiker: When you engage your external tender, how long does it typically take to recover your weeks worth of drainage? Also, which type of 12v battery have you installed?
2013 S w/QC. Factory sticker says Oct. '13. AGM deep cycle 12v (35Ah sticker)

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Marktm
Gold Member
Posts: 359
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737

Re: 12v battery dies overnight 2013 S

Thu Nov 09, 2017 7:55 am

Neptuneninja0 wrote:The factory battery that I removed absorbed very little energy when I charged it outside the car. It had sulfuric acid all over it so whatever that means, maybe the leaf had at one point tried to overcharge it.

The NEW battery runs well. Yet, when I run the new charger over night, the damned thing never stops charging. The AGM is only rated on the sticker for 35Ah. the formula in the charger's manual says even at very low state-of-charge, my battery should be full in 21 hours.


Flooded Lead Acid (FLA) batteries are sometimes not easy to diagnose without checking many things, but it is possible that your battery failed with one cell shorted out and/or went dry and became essentially "open" circuit - but will not charge in either condition.

If you have a DC voltmeter, you can check across the battery terminals under various conditions to determine if you actually have a problem with the new AGM battery. You can search this forum for very detailed information from others about how the 2013 model charges the battery. I believe that the Leaf's charging profile is a little better for AGMs than FLAs and is likely to be OK if you use your external charger anytime you do not drive for several days or even weeks. The only "worry" that I have about using AGMs, is that the Leaf's charge profile will go above 14 volts for relatively short periods of time. I know that "small" AGMs have very cheap venting systems and will dry out if charged above 14 -14.5 volts for any length of time. Get a VOM and take some data and let us know.
2012 Leaf SL; 36,000 miles. Battery replaced November 1st, 2016.
Rural cabin with 6750 watts Grid tied PV. Off-grid solar Leaf charging capable (level II).

mjblazin
Posts: 218
Joined: Sun Mar 15, 2015 8:52 pm
Delivery Date: 11 Mar 2015
Leaf Number: 405999
Location: Dallas, TX

Re: 12v battery dies overnight 2013 S

Thu Nov 09, 2017 10:02 am

I have 2013 SL 21,000 miles that received Telematics update last Decembet. The only 12 volt drain issue I have occurs when leaving the WiFi connected that I use with LeafSpy Pro. It can drain 12 v after 3 days.

If it drains overnight, other than bad battery, I would say a short somewhere in the accessories.
2013 SL Blue Ocean
Bought used, March 2015 12,764 miles
11/12 bars. 235 gids 18.2 kWh
Appears fully loaded
Condo home, Using public charge except in emergency
Dallas, TX downtown, shaded non-temp controlled garage

LeftieBiker
Posts: 7402
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12v battery dies overnight 2013 S

Thu Nov 09, 2017 10:22 am

mjblazin wrote:I have 2013 SL 21,000 miles that received Telematics update last Decembet. The only 12 volt drain issue I have occurs when leaving the WiFi connected that I use with LeafSpy Pro. It can drain 12 v after 3 days.

If it drains overnight, other than bad battery, I would say a short somewhere in the accessories.


The telematics unit drain is a known issue. Just be grateful that yours isn't one of the defective ones.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

billinjax
Posts: 1
Joined: Mon Aug 17, 2015 5:16 pm

Re: 12v battery dies overnight 2013 S

Mon Nov 27, 2017 6:33 am

I have a 2013 SL and am having the dead 12 volt battery issue since the telematics upgrade. Does anyone know what fuse could be pulled to disable the telematics?

LeftieBiker
Posts: 7402
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12v battery dies overnight 2013 S

Mon Nov 27, 2017 7:34 am

A question for LeftieBiker: When you engage your external tender, how long does it typically take to recover your weeks worth of drainage? Also, which type of 12v battery have you installed?


I plug in more often than once a week. It usually takes between 30 minutes and 3 hours. Sometimes as long as 5 or 6 hours.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

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Stanton
Posts: 1958
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
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Re: 12v battery dies overnight 2013 S

Mon Nov 27, 2017 9:20 am

billinjax wrote:I have a 2013 SL and am having the dead 12 volt battery issue since the telematics upgrade. Does anyone know what fuse could be pulled to disable the telematics?


Everything you need to know is in this thread (http://www.mynissanleaf.com/viewtopic.php?f=31&t=21573)
20A fuse #34 is the one you're after (fuse box right in front of the 12v battery).
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
Wet Okole seat covers (front)
Tor's low-power heater mod
2013 sun visor
3G modem upgrade
L2 EVSE Upgrade
Battery Pack replaced (Rev E) @51 months and 41k miles

bbrowncods
Posts: 187
Joined: Fri Jun 06, 2014 8:53 pm
Delivery Date: 09 Jun 2014
Leaf Number: 339458
Location: Norfolk VA

Re: 12v battery dies overnight 2013 S

Tue Nov 28, 2017 11:58 am

Still have the problem. Dealer confirmed with Nissan that there is no fix. Nissan told dealer to turn off the Telematics Control Unit. Wasted $199!
"We'll get back to you" was the solution I was left with. I responded with "What about the $199 I paid"..."What do you want?"..."My car to work or my $199 back"..."Not going to happen". Nice!
2014 Cayenne Red Leaf SL purchased 6/9/2014 (dealer received it on 6/7/2014), manufacture date 4/2014.
7/4/14 -629 miles, Temp 83, SOC 97.5, 59.81 Ahr, SOH 91%, Hx 91.44, 20.2 Kwh, Avg 4.127, High 4.136, Low 4.122, GIDS 267/92.5%.

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