Also FYI I'm considering the juicebox kit @ $179 FYI. 15kw @ 240v. at 115v it is limited to 1.5kw but that is plenty for a bike. Probably tap into the J1772 protocol to control it or something, don't know about several hundred in special cables/plugs though. And balancing is still an issue.
Electric Motor Werks, Inc. - CUSTOMIZABLE JuiceBox - an Open Source Level 2 (15kW) EV Charging Station