I have a dynamic energy contract. Last weekend the prices were -60 euro cent per KWh. This means that every solar KWh I return to the grid costs me 60 euro cent.
Is it possible to switch the inverter off or pause during the time this situation is happening?
I have a MOD9000TL3-X
how and with what did you integrate the inverter into Home Assistant? If you have/use a Growatt Shine Stick you can flash ESPHome on it and then integrate the inverter with Home Assistant via ESPHome. See:
FYI: GPIO0 and Ground must be connected by a bridge so that the stick goes into flash mode.
With ESPHome you can set the Max Output Power for the inverter
That’s bad, of course, but unfortunately I can’t help you remotely. Unfortunately, all short instructions that I have posted in forums are completely in German.
Example: Growatt MIC MQTT - Wechselrichter - Photovoltaikforum
Only the values for the possible input data (DC) from the sum of all connected PV modules must be observed. The AC output power of an inverter can be regulated and thus reduced.
Hi,
Do you know whether sending the “max output power” to register 3 will be saved on the EEPROM of the inverter?
I would like to regulate the output power based on feed in power prices and household demand but I am concerned to change the value frequently and potentially “wear out” or damage the EEPROM.
Yes. The inverter switches off overnight and the setting is still there the next morning. Unfortunately, I can’t tell you what effect a dynamic adjustment of the value (several times a day) will have.
Sorry, I can’t say anything about that. According to the last Growatt Modbus documentation version 1.24 (from 2020) I have, the Modbus address 3 should be correct.