There are indications in tests here in New Zealand that some 2016 cars are under reporting capacity as presented in SOH and lost bars.
All of the available evidence shows that the batteries are losing capacity
rapidly, not under-reporting it. This is an important distinction, as it means a real physical deterioration of the packs, as opposed to a software glitch in the BMS.
The amount of charge accepted from flat by several cars seems to be significantly more than would be expected from the AHr/SoH and kWh reports from Leaf Spy (simply relaying car BMS). If drivers only go down to LBW or VLBW they may experience the reduced capacity as these indications seem to be triggering at higher than expected voltages on some cars.
If there is evidence that confirms the total holding capacity is reduced, not just capacity down to the warning levels, references would be appreciated. I accept there will be cars that have lost more capacity and there will be variability across the whole fleet.
If we use the value from Nissan of 31.78kWh from empty, would we expect to only be able to put in SoH * 31.78kWh at 240V and 15A ? There might be calibration errors in the EVSE kWh reporting but the example I gave was the car accepted a lot more than would be expected for the SoH (87% vs 76% reported SoH). Unfortunately only using down to LBW and VLBW can show reported loss of capacity which might not be actual.