I plugged my Leaf into a ChargePoint station. It was in Very Low Battery status near the point of "Turtle Mode". The Range and Percentage values had both been blinking for several miles. I generally avoid letting the battery get that low, other than for tests.
I left the Leaf charged in for nearly 5 hours, to let it go through its monthly "Cell Balancing". My understanding is that "cell balancing" about once a month is recommended as "best practice" for battery life and/or performance.
I use the ChargePoint app on my Android device, but not LeafSpy. The app and the ChargePoint head LCD screen showed 20.8 kW put into the Leaf. Another factor is that there are some inefficiencies with 220v charging from heating and inverter losses, so that all 20.8 kW wouldn't actually get into the Leaf's Li-Ion battery. There were also some losses from "cell balancing" with the highest cells being drained several times.
I'm pondering how to interpret that.
- I was expecting something like 25+ kW, reflecting losses from the charger thru the inverter to the battery
- As expected ... the 24 kW rating is optimistic
- reserve capacity ... there is less that 24 kW actually available
- battery capacity is declining, and the 12 bar indicator may be getting closer to losing a bar to 11