Fronius inverter e.g. Symo, setting "Maximum feed-in power" and dynamic power eduction algo via ModbusTCP

1

Hi,
I need to enable/disable the internal “dynamic power reduction” algorithm using the ModbusTCP protocol. I found only the modbus address for the register of fixed percentage power limitation (0-100%).
Do you know if it is possible to activate/deactivate this algo only from inverter service web page, or if there is a holding register for activating/deactivating dynamic power control of the inverter, please?
In the activated mode, the inverter itself monitors the so-called “Maximum feed-in power,” ensuring minimal overage power injection into the distribution network. Thank you for your responses.

FroniusDynPwrModbus
FroniusDynPwrModbus970×964 174 KB

SetLimit
SetLimit776×846 102 KB

Hi,
I thing, that dynamic algo is not possible via modbus register controll. I would like to speak with some Fronius inverter programmer. Native algo can dynamically follows consumtion, so feed-in value can be automatiocally hold on minimum. But I can’t reach over phone, email Fronius support. Our czech support isn’t able to answer.

Solaredge inverters are able to activate/deactivate dynamic power native algo via Modbus, why Fronius doesn’t this implemented into modbus !!!
I can imagine, that Sunspec should reserve some modbus telegrams to unique the procedure.

2

What are you trying to achieve and I might be able to help. There are two ways, either the inverter does the heavy lifting on reducing export to the grid or Home Assistant. I’ve done a bit with modbus and Fronius, let me know your use case.