Those numbers don't line up with the reported stats.

https://insideevs.com/reviews/711268/telsa-cybertruck-charging-speed/

The battery can be filled in approx. 60 minutes. (Supercharge)

He must have done something wrong. Alternatively, the grid operator can use the full battery for the power grid overnight. This is possible.

https://youtu.be/pDDbMxK56VM?si=pF0F3mQQABo0bRBz