More like this, please — In all honesty, this is the sort of thing we really need to be seeing from Elon Musk and Tesla going forward, not unreliable Autopilot software and promises of a forthcoming bipedal workbot named Optimus. For all his many (many) faults, Musk at least knows and is extremely vocal about our need to revolutionize the means of energy production if we are to even have a prayer as a species. Although products like the Powerwall are so pricey as to be pretty much reserved exclusively for well-to-do homeowners, already initiating communal programs like this ahead of wider consumer adoption is a very smart way to make sure a system is in place to scale much larger as needed.
Hopefully, this will actually be the case, and Tesla will soon put vastly more time and resources into renewable energy infrastructure instead of luxury vehicles and Cybertrucks.