I understand the percentages, I am guessing that includes the overhead losses from the pumps running as well or is this only the onboard charger itself?
Otherwise it should look like this, correct?
To add 20kw to the battery with...
120v stock EVSE with 6.6 on board consumes 25.64 kWh
120v stock EVSE with 3.3 on board consumes 23.26 kWh
240v 3.6 on board consumes 22.35 kWh
240v 6.6 on board consumes 22.10 kWh