Tesla Powerwall Integration -> charging from grid switch

Hello, I would like to request a function extension for the Tesla Powerwall 2. The is about the integrating of a switch like in the Tesla app, which makes it possible to charge the Powerwall via the grid.
This then offers the ingenious function, for example via the Tibber integration, to load the Powerwall when electricity costs are low and to discharge it later when electricity costs are high.

Thanks in advance.