Yesterday arrived home with almost dead battery. Thought that I will run it down to turtle for calibration.
Ran down to turtle (0.5kWh left). Charged it to 100% (my 100% is 21,9kWh, 95% battery SOH left).
EVSE power meter showed 23.1kWh of consumption.
I should mention temperature was a bit below freezing. Water pump is not running
at this temperature on 2014 Leaf.
Also there was a defrost cycle during that charge cycle, consumes 0,6kW for 5-12 minutes, therefore subtract up to 0,1kWh.
It appears to get 21.4kWh of battery charge it used 23.0kWh. Holy cow
That is around 93% +/- 2% efficiency
Charging at 230V/16A.