Just took delivery of our Model 3 today and finally had the opportunity to thoroughly test our dual wall charger set-up. It works like magic! Two HPWC’s sharing one 100 amp circuit. From the HPWC installation manual: The Wall Connector includes a feature whereby Wall Connector to Wall Connector communication allows you to split the maximum available load over a maximum of 4 Wall Connectors. The wire used for this local network must share the main power cable conduit or be housed in a separate conduit. In other words, the high voltage wires must be branched to a junction box from each individual unit.