Ev charger

Hi. I have an issue. I have solar cells with battery backup. And i have this solarcharger for my ev. Which is not possible to access from Homey.
The charger will charge when the sun is shining enough, but the charger do not stops when there is not enough sun, it will just take the power from my battery. So my question is. Is there some way i can do something for maybe stop the charger or at least get an notification when my house is using to much power or my battery is getting drained. The solar system is a growatt and i cant get it to Homey. Thanks