If you want to find actual capacity loss on a "30 kWh" LEAF, I'd suggest you test your pack the same way you would for a "24 kWh" pack, albeit with far fewer of the test parameters and variables known, and with only a single (?) "30 kWh" pack having been tested by a high-integrity source.
The EPA test of a 2016 "30 kWh" LEAF
(strangely...) shows the same 31.7807 kWh from a 240 volt EVSE required to recharge after both the city (UDDS) and highway cycle tests.
This
could correspond to a ~30 kWh (total) pack, that is ~90% accessible, and recharges at ~85% average efficiency over the entire accessible capacity.
Monitor the kWh your pack accepts (and/or the charge time, and voltage) after similar depletion from fully-charged (240 V) pack, after a similar single-event full (to stop) discharge.
Results should be expected to vary a great deal with pack and ambient temperatures, which I don't know for the EPA tests (?)
I'd guess the EPA might test near the 70F to 80F range?
Anyone know?
In "24 kWh" LEAF pack tests, there is significant variation in charge accepted even for the same pack, in identical tests.
This is evidently due to the LBCs inaccuracy in determining the upper and lower charge limits.
You should expect the same in the larger packs, so do not expect a single test to be determinative.
Remember, you are not able to test total pack capacity, only the capacity your LEAF's LBC allowed you to access during the given charge/discharge cycle.
Repeat, to get a larger sample, and also to determine the accuracy or (inaccuracy) of your LBC in determining its upper and lower pack limits.
Certification Summary Information Report
Model Year 2016...
Test Date 03/11/2015
Test Procedure 81 - Charge Depleting UDDS
Recharge Event Voltage 240...
Recharge Event Energy (kiloWatt-hours) 31.7807...
Total distance (mile):166.410...
Test Procedure 84 - Charge Depleting Highway...
Recharge Event Voltage 240...
Recharge Event Energy (kiloWatt-hours) 31.7807...
Charge Depleting Range (Actual miles) 136.408...
Charge Time[sec]:20733...
https://iaspub.epa.gov/otaqpub/display_file.jsp?docid=36671&flag=1
2017 MY certification appears to use the same test results:
https://iaspub.epa.gov/otaqpub/display_file.jsp?docid=38806&flag=1