Real life figures of vampire drain in 2018 Leaf

[DaveinOlyWA]

You need a voltmeter on the battery, with the car Off for at least 15-30 minutes. When the car is On, the accessory system voltage is boosted by the DC-DC converter that charges the 12 volt battery from the pack. This is also why reading the voltage with LeafSpy is useless.

If the car was boosted (voltage over 14) I found a wait time of over an hour to be more accurate. I tried the 20-30 min thing and was getting 12.7ish when the actual voltage settled to 12.5ish within 2 hours.

If it wasn't boosted (voltage 13) then it was more like a 10-20 min wait

This is another reason why I believe Nissan still has not figured out the right way to correct this issue.

On consecutive days I checked and found 12.5ish
then 12.3ish, then 12.1ish then back to 12.5ish. I charge nearly every day since I believe this helps maintain the 12 volt and these checks are before plugging in. I generally only charge 75 mins on days I work, ~ 2, sometimes as much as 3 hours on days I don't.