AnkoH:

 

We would like to find out if numberonekiwi's statement is correct and can reliably be used. For people prepared to help me, would you mind posting or directly emailing me your VIN, model-year (and month if known) and battery size? 
Mine are:

 

       AZE0-2003xx   dec-2015  30 kwh

 

I suggest to mask the last 2 digits of the VIN for privacy reasons. The VIN is visible in LeafSpy-Pro and possibly also in the other LeafSpy versions.

 

All ZE0-xxxxx cars and AZE0-1xxxxx are 24 kWh, but for AZE0-2xxxxxx 2015/2016 cars they can either be 24 kWh or 30 kWh. You can determine which by entering the chassis number into:

https://www.japan-partner.com/check-manufacture-year.php

zenourn:

Thanks of that link, it confirms my fears that the VIN cannot be used to predict battery size. VINs send in to me by geekzone users already pointed that way.

However, it does conform that teh VIN can be used as a rough indication of model year:

ZE0-   2011-2012

AZE0-0 and AZE0-1  2013-2015

AZE0-2    2016-2017   (starting production late 2015)

ZE1-        2018-

update: corrected typo of AZ1- into ZE1-

VIN might not but chassis number usually will give you more details eg battery size possibly

I see a couple of recent listings on Trademe 2017 30KW Leafs & dealer is quoting Leafspy SOH results at over 100%. 

" Nissan Leaf GEN2 30KWH 105.60%SOH 2017"  &

" Nissan Leaf GEN 2 30KWh 100.61%SOH 2017".

I assume the new software has been applied to these cars.

However for Leafspy to show SOH at over 100% on a Leaf travelled almost 10,000K to me is a little unnerving.

Surely this must be a false result & indicative of some  "smoke & mirrors"  in the new Nissan software update.

Or am I reading this wrong ?  

Watching with interest.

I know that this situation is encountered on Lead-acids and alkaline batteries as the manufacturer will state the minimum amp-hour rating on the label, but due to manufacturing variances, or the manufacturer giving themselves some breathing space by understating the specs, you will frequently encounter batteries that have more amp-hours than is stated in the specs. 

 Personally I wouldn't put too much stock in the figures, even if they are totally legit  - Looking at SOH decay graphs such as those on Flip the Fleet, SOH dives to 90-95% pretty quickly, then levels off, so in practise I wouldn't expect there to be much long term difference between a 95% car and a 105% car. IE, all other thing equal, two such cars won't maintain a 10% difference - they'll end up within 1 or 2 % of each other. 

clive100:

 

I see a couple of recent listings on Trademe 2017 30KW Leafs & dealer is quoting Leafspy SOH results at over 100%. 

 

" Nissan Leaf GEN2 30KWH 105.60%SOH 2017"  &

 

" Nissan Leaf GEN 2 30KWh 100.61%SOH 2017".

 

I assume the new software has been applied to these cars.

 

However for Leafspy to show SOH at over 100% on a Leaf travelled almost 10,000K to me is a little unnerving.

 

Surely this must be a false result & indicative of some  "smoke & mirrors"  in the new Nissan software update.

 

Or am I reading this wrong ?  

 

100% SOH is based on the stated capacity of the battery, but individual batteries can have higher capacity.  Not all batteries will be equal in size, even if they are '30kwh', and they are probably getting slightly better with time as they improve manufacturing.

These cars have already done 8-10,000K  so if still over 100% now, then what might they have been when straight off the production line ?  Still think this is a software report error. 

clive100:

 

These cars have already done 8-10,000K  so if still over 100% now, then what might they have been when straight off the production line ?  Still think this is a software report error. 

 

No software can accurately report what's left in a chemical battery, it's just an estimate.  Mileage is not a significant factor in battery aging, but time is.  If the battery was 2 years old I would expect a drop in SOH, but you really need to know what it started at.  If it went from 110% to 102% that would be possible without any software 'error'.  It really just means you started with a 33kwh pack that was sold as a 30kwh pack.

I see your point but I wonder what was being reported prior to the software update. Were these reporting high degradation of the 30KW battery as has previously been noted & now under new software an extra 10% or more battery capacity has been found after the update? 

clive100:

I see your point but I wonder what was being reported prior to the software update. Were these reporting high degradation of the 30KW battery as has previously been noted & now under new software an extra 10% or more battery capacity has been found after the update? 

clive100:

 

I see your point but I wonder what was being reported prior to the software update. Were these reporting high degradation of the 30KW battery as has previously been noted & now under new software an extra 10% or more battery capacity has been found after the update? 

 

Not sure if these are Japanese LEAFs, but if so, and seeing they are 2017 built, I would suggest they have not had the BMS firmware updated as they would have had the latest firmware installed at the factory. Our Japanese LEAF is a November 2016 build and that had the latest version of the firmware installed during manufacture.

When was the updated firmware release made available to the dealer network for the 30KW Leafs ?  

Apparently these particular cars were purchased & imported by NZ car dealer direct from Nissan agent in Japan.  I would strongly believe these would have latest firmware installed prior to being landed here. 

The point of my question still how can a 1 -2 year old 30KW Leaf driven 8000K still had battery SOH at 105% ?  when previously that same model 30KW Leaf would have been showing probably 90-95% on the original firmware at similar mileage.  

Surely the Firmware upgrade was to recalculate & display a more true to reality battery condition, not just inflate the SOH % to a more acceptable level & in the process produce over 100% SOH reports on 1-2 year old cars with low Ks on the clock. 

I think you are missing my point. These cars would not have needed the firmware update because they already had the latest version from the factory. What effect the firmware upgrade would/might have had is moot because they did not need/get the firmware update.

Elliemay:

 

I think you are missing my point. These cars would not have needed the firmware update because they already had the latest version from the factory. What effect the firmware upgrade would/might have had is moot because they did not need/get the firmware update.

 

I think he's blaming the latest firmware, not whether it was factory installed or updated later on.  Either way its the same software he's blaming for the > 100 SOH.

I think its possibly a bug with LeafSpy, or just the newer cars are shipping with slightly better batteries.  They may have switched suppliers but still call the cars 30kwh.