Err…pardon?
Well, those values are of no real value, are they. Just sums, not even current values.
Let alone a possibility to control battery charging.
Is there any written reference of that API?
Oops… was probably a typo → changed.
That’s right, it’s not live data, it’s 60-second data and you can only read it, not control it - but maybe it helps.
For me, it’s enough for visualization. And there is also the possibility to read out the daily data.
Here again the API documentation (not official):
Here has Georg Ledermann taken the trouble to use the data to present it: (it is in german)