Energy lost during charging

[wrickcook]

So, I know that if I add 27kWhs to my battery, it added more that 27kWhs to my meter.
There is resistance, heat loss etc.

Does anyone know how much energy it takes to charge 110v vs 220v?
I have been using the stock charger for a few months, but recently switched to a Leviton http://www.amazon.com/Leviton-EVB32-H18-Evr-Green-Charging-Station/dp/B00YCRNJVY/ref=sr_1_5

 

[notfred]

I've seen figures of about 600W for car power in the charging. It's therefore better to charge at 240V and as high a current as you can to make that 600W as small a percentage of the total draw as possible.