OSO Charge hotwater heater VVB

Hi!
I have installed OSO charge heating tank. I would like to use Sparegris to control the unit.
But OSO charge is missing in Sparegris.
Is it possible to incooroprate it?

Welcome to the Homey forum,

Please ask the developer in the specific app topic, as mentioned at the homey.app store app page:

Doesn’t it have its own controller yet? If so, what functionality can you add by Homey?

I want to charge the tank at certain times of the day, and take solar cell production into account.

As far as I understand your use case, you need three apps to realize this. The OSO inCharge app, the Piggy Bank app and an app for your PV system.
And then you need to create an intelligent flow from this.