Adding max_ac_charge_current as changeable

[sceife]

Description

I would like to use my existing solar system to charge excess energy into an external battery.
In order not to waste energy, it is important that only as much energy flows into the external battery as how much excess solar energy is available.
I would like to control it via an entity ac_battery_charge that I can currently only see but cannot change.

Suggested Solution

I can change the value directly on the Growatt SPF inverter. It would be great if it could be done directly in the app.
Changeable like the AC Input Mode, Buzzer or active_power_limit

Alternatives

No response

Additional Context

No response