The retrofit kits were developed in collaberation between Argonne National Labratory and Xavier technologies. The communication module (above) can also be used with the CHAdeMO charging port because it incorporates CAN communication protocol as well. These kits were designed for the BMW i3 (2014 models) that didn't come with the fastcharging option or the Mercedes B-class (which doesn't presently have the fastcharging option) to utilize the CHAdeMO or combo connector fastcharging ports.