I think if the solar roofs were operational that Elon would have mentioned that and even showed the power generation. As is though, it seems these were early proof-of-concept roofs that show that solar roofs can look amazing. I think there's still a lot of work to get done.
Btw, I was at the event last night. Hanging with
@FredTMC and his wife. Fun time. Great event with great food and not too crowded.
The roofs looked amazing! Even better in person. I couldn't tell that they were solar roofs before the presentation. Out of the 4 houses I speculated that maybe one or two of the houses might have solar roofs but "for sure" not all of them. When Elon said they were all solar roofs, people around me were in shock and disbelief. Guy next to me kept saying "holy sh**, they look amazing." He couldn't stop repeating himself.
The roofs looked better than normal roofs. Everyone at the event was impressed at how good the roofs looked.
I spent a lot of time talking to a Tesla engineer who was answering questions about the new powerwall. The Powerwall 2.0 looks like a hugely improved product over Powerwall 1.0. Looks like the inverter is a 5000 way DC to AC inverter so that battery power can be fed into house (or grid). However, of installing solar you'll still need an inverter for your solar panel system, I was told.
The Tesla engineer said that Powerwall 1.0 install costs we're roughly $7-8k, largely due to the need to install another inverter. So with the new Powerwall, install costs go down dramatically since the inverter is built-in the the Powerwall.
I was also told the solar roof was largely a Solarcity product, meaning development was largely done at Solarcity.