Another update!
Another software OTA update, another few small capabilities. The car will now roll up the windows when you lock it, and will text you if it's left with a door or trunk/frunk open for over 10 minutes - assuming you turn these on.
But that's not the interesting one. This latest update also integrates with the Tesla Powerwall. That's a big backup battery for your home, to allow you to store energy during low-cost periods and use it during high-cost periods, or to be used with a solar system, or of course to power your house in the case of an outage. It's not a new concept and I suspect it's the software that would differentiate the Tesla offering from other battery options. But now the Model 3 works with the Powerwall to charge during a power outage. The Powerwall will manage the charging of the car while prioritizing the house, and you can bias the preferences somewhat. If you're on solar, the Powerwall will divert surplus power to charge the car during an outage. The documentation makes reference to "control of your energy ecosystem".
Of course, the real trick would be to use the car to supply the house during an outage, but that would require a very specific wiring setup for the "charger" to make sure the car doesn't electrocute some poor worker trying to fix the problem.
So that's pretty cool. If you have made the investment in solar power and a Powerwall, there's a nice level of integration between them and your electric car. It doesn't sound like it would make any real difference day to day, but it works pretty nicely for the hurricane or wildfire scenario.
A Powerwall runs something like $15k for 27 kWh of capacity. The Model 3 has a 75 kWh battery, which really shows how much of the cost of a full electric is in the battery.