- I do want DC-direct car charging, not double conversion, something who exists in EU CCS-combo as a standard but not a single vendor implement it...
- I do want a LOCAL FIRST (and only eventually) system, some vendors offer that, I do not know if Tesla offer that but I doubt a bit
- I do want modular batteries because anyone have different storage needs
- a classic string inverter OR microinverter who do not waste p.v. power because modules output more than they can convert for AC usage, but DC direct for charging all batteries AND possibly for heat pumps compressors as well
Why I write this here? Well because Telsa have a single peculiarity "being ahead of the others" and actually for p.v. they are not ahead of anyone. My small system is built on a Victron master inverter (relatively FLOSS with a custom Debian named VenusOS, well integrated in Home Assistant), on BYD moderately modular batteries and Fronius p.v. inverters, good for the p.v. parts but very bad in software terms. It's still more open than Tesla and perform better than PowerWall+Solar roof in theory.
Tesla cars still have the best software even if way too much service-oriented, but beside that they have shown very little innovation and China taking on quickly, also some choices like do not have V2L I can use to power my main inverter and so a bit usable to power the home with extra storage of the car battery penalize Tesla as well.
Long story short in the past they was good. But tech evolve and they seems not much interested in positive evolution. I'm not interested in Cybertruck or in small usual cabin controls changes like directions on the steering wheel as buttons, I do care about substantial evolution.
If Tesla offer something like:
- a hybrid p.v. inverter with 400V DC + data channel and car charging home station
- modular storage from 5 to 50 to 100 kWh
- home heat pumps DC direct for sanitary water, home heating/cooling
I buy it, no question. If not they haven't nothing I can buy from different vendors, cheaper and even less closed.