Tried but doesn't work I tried this. Looked like it was working fine. Tell the EVSE that it can draw 20 amps so it does 10 on each (of two feeds). But we current tested it and the Tesla was drawing all from the single phase. This is a 2015 Model S. So the car detected that it was not 3 phase (because the lines were all in sync) and just sucked power from one phase. I tried with all three connected as well. Earlier in this post there was talk of the cars changing to connect the single phase to all three of the charge units (in a single charger). So that you did not need dual chargers to get 22kw. Maybe this change forced the effect. It is disappointing because 2 x 10 or even better 3 x 16 (from a caravan park) would have been very useful.