I've been reading through this thread wondering if anyone knows about the DCC-9 solution. I had a condo when I got my Model 3 and bought a DCC-9 to run off of my 100 amp panel. It's a great solution for condo because all of the additional power requirements still come off of an owner's meter. The device handles load sharing. I ended up moving to a building with a large garage that has 4 parking slots for EVs so I just pay a low monthly fee for charging now. When I bought mine the DCC-9 was about $1,000. I still have my brand new, never installed unit that I would sell to a fellow Tesla owner for $500. If interested just contact me.