A local Ford Focus Electric owner (the same one that added CHAdeMO and a second charger to his car) has now constructed a single phase home CHAdeMO quick charger. He asked me and my LEAF-driving friend to stop by and test it out sometime soon.
It is built out of 5 Focus Electric on-board chargers (6.6 kW each) and will charge at up to 31 kW. I will try to ask him how these are isolated.
http://www.myfocuselectric.com/forum/vi ... =16&t=3189
If this setup works the way I'm thinking it does, a pair of these chargers could enable use of two public charging stations simultaneously with the i-MiEV for up to 13 kW charging rate. Two separate, isolated chargers would make that possible without a lot of interlocks and safeties in trying to parallel two stations on the AC side. Each charger is dedicated to a charging station (since nearly all public stations only handle 6.6 kW anyway) and both chargers are paralleled on the DC side. Other uses could include:
1. 40 Amp (8-9.6 kW) charging from a NEMA 14-50 outlet (RV Park).
2. 6.6 kW public charging.
3. Rapid home charging, as is the purpose of the unit linked above.
4. Possible 16-19.2 kW charging from a Tesla HPWC (not a Supercharger. Couldn't use one anyway for multiple reasons.) or Clipper Creek CS-100.
5. Road trips in non-CHAdeMO areas are now considerably faster with charging time being reduced by at least 50%.