In case of really bad API troubles from Growatt’s side (not Robin’s app fault) :
If your inverter supports it, people can use the aforementioned Growatt modbus app, which uses a local connection;
or, if the inverter is “API only”:
people can use the Grott app, which needs an additional pc (thin client / Raspberry Pi) to run a python script.
This puts itself “in between” your inverter and Growatt API, which provides for a very stable local network connection, and, if you allowed it, it keeps sending data to the Growatt cloud.
I have it poll every minute.
