I have successfully connected the OpenEMS to the GoodWe Hybrid Inverter ETplus+, specifically linking the Battery Inverter and Bridge RTU components. However, I am facing an issue where the display on the UI screen does not show any data, even though the system appears to be connected.
This suggests that while the system is in an “Ok” state, the AllowedAC value remains undefined. I am unsure if this is a configuration issue or something missing in the integration setup.
Has anyone encountered a similar problem or have any suggestions on how to resolve this issue?
as far as I know, the BatteryInverter is used together with the Battery component, in cases where OpenEMS have separate connections to the inverter and to the battery.
If you have the Goodwe ET with a connected battery, I would expect that the battery will be controlled through the Goodwe Hybrid Inverter.
In this case, I would try to use the Goodwe ESS together with one charger per used MPPT Port (if you have PV strings connected).
just like MrT described it depends on whether you are are using the inverter as an “ESS” or as a “BatteryInverter”:
Use ESS if you have a battery connected that is directly communicating with the GoodWe, e.g. a BYD Battery Box. Then OpenEMS only controls the inverter.
Use BatteryInverter if OpenEMS talks to both the battery and the inverter directly. This allows deeper optimization and is used e.g. in FENECON systems.
