I have a question and I'm sure everyone has gone through this process one way or another but... I just recently had an electrician install a tesla wall charger and 60 amps and I had a tesla coming in which was scheduled for delivery next week but i canceled delivery due to the 2.0 update. Anyways I created a new order and wanted to upgrade to the 72 amp battery because it's at a faster charge. I read somewhere that Id need at least 90 amps for the wall charger to charge correctly on the 72 amp on board battery... But that post was also in march of 2015... Anyways any feed back is much appreciated thank you!