Your comments

Thank you very much for your answer. I do have a BMS system, but its not using CAN en thus it is not connected to the CAN bus of the scooter. So I think your Chademo option will not work for me. Probably most NiMH to Li converted bikes can't use your system in that case. The Dutch firm "new electric" has an Chademo kit available almost as a "stand alone" unit. The SOC is determined by a shunt, pack voltage is measured and I guess that high and low cell are "faked" if the BMS cannot be used for that.

Is something like this an idia for you to apply? All home converted Vectrix could benefit from your Chademo option independant of the BMS system used.