2014 Ford Focus Electric (new EV driver and LOVING IT!!!)
Charger Efficiency (34.8%)
I took 3 trips totalling 13.4 KWh (3.5 + 3.4 + 6.5). Used 70% of battery.
Charged with 120V charger and used Kill-A-Watt meter to measure 18.06 KWh of energy used to charge back to full. This also estimates a usable battery pack of 19.14 out of the 23 KWh.
I did sometimes hear coolant flowing as I walked by the charging car, so yes, some % of the energy is used for temperature maintenance.
Hoping some others will share their usable battery pack estimates and charger efficiencies. I will post a 240 V efficiency if I can obtain a device to measure it.