Yes, though 7kW should be enough for overnight charging; for me the main justification for dual chargers was charging away from home (Ecotricity charge points - as you say, largely obsoleted once CHAdeMO is available), though there are those odd occasions where I've been driving during the day then come home and want to head off with the family on (eg.) a friday night. I've currently given up on more than 7kW at home, but I'm thinking about getting a 3-phase EVSE installed somewhere nearby (I have a mate with 3-phase in his industrial unit, or my parents have a flat where the landlord's supply is 3-phase and we control the management company). Is there something unusual about your installation? I didn't think that 200A single phase was generally available (other than by using only one phase out of a 3-phase feed), but I'm happy to learn if I'm wrong! My understanding (particularly from reading the threads on here from Norway) is that the car won't make use of a 63A single phase supply wired as per IEC 62196 (ie. using the highest-rated connectors and feeding only the L1 pin with 63A of single phase) - it will only charge at 32A from such a supply, since internally it is three (or 6) separate chargers, wired one (or 2) per phase. People in Norway have been using a standard 3-phase 32A EVSE, simply wiring the single phase supply to all three phase inputs of the EVSE in parallel (and thus feeding the same single phase to all 3 of the pins on the connector at the car). Since this is a non-standard configuration, there's the question of what to put on the pilot pin; logically, you should be setting the pilot for 32A (which means 32A from each of the 3 phases in a 3-phase setup). I was told that the Model S interprets the pilot differently when it detects that the three phase inputs are the same and so you need to set the pilot for 80A - but I am not sure I believe this, it may have been a misunderstanding.