I would recommend that you consider something like the Zappi charger that can be set to only put excess solar into your car.I expect to deliver my M3 RWD by the end of Dec 22. I ordered it on the 11th July, just a few days after they stopped supplying new orders with a UMC, but I don't actually recall being given the option to add the UMC to my order. I only found out about that decision a few days after I had placed my order. I would have placed my order earlier if they didn't have such a long wait to test drive.
Do you think I could be getting one? It's really made things more complicated as I'm now not sure whether to order the Tesla Wall connector and have it installed, or just order the UMC. Before I sold my old car I used to do between 5-10K KMs per year, so I don't think I need the Wall Connector because the car will sit at home most days and can charge slowly with free electricity from my 7.8kW solar array.
I've also been a bit hesitant about taking delivery instead of delaying and waiting for a 2023 build, but then I don't want to miss out on USS.
Too many decisions!
It’s more expensive than the Tesla wall connector but the V3 wall connector will respond to signals sent by another device to match your solar production but the Zappi has it built in.