Value for CurrentPower or every other istant power value are 0

[wonka929]

As for the description, i would like to monitor the power production every 15 minutes. I tried every possible function in the library but every istant power generation key in every JSON is just valued '0kW'.

Do you know if there's a reason for it?

I tried both https://openapi.growatt.com/ and https://server.growatt.com/