Tesla launches virtual powerplant that pays Powerwall owners to end brownouts

Googling around, I found this:

>This summer, the potential gap between energy demand and supply could hit 3,500 megawatts.

https://www.scientificamerican.com/article/california-faces-...

The article says:

>Tesla said that it has about 50,000 Powerwalls that could be eligible for this VPP, which add up to a significant 500 MWh of energy capacity than can be distributed in any event.

But presumably a 3500 MW shortfall is the rare peak, and not a typical shortfall. How big of a dent would we expect this system to make in something closer to the average case? Are most brownout shortfalls closer to 500 MW, and how long do they last?

Did anyone else notice the 69/420 references in the screenshot? Just little funny details...