S-Series Modbus settings

[kay]

I have an H1-6.0-E inverter from which I collect Modbus data without any issues. I’ve just added an S2-2500 to replace an underrated Solis.

After wiring the Modbus connection to the new S2-2500, I can’t find any Modbus settings in its menu. Is the S2 series limited in which Modbus settings (such as baud rate, Modbus ID, etc.) I can change? On the H1, these options are available, but the S2 doesn’t give any indication of its Modbus settings, making it difficult to get data from it.

Thanks

[Will]

Are you using a different modbus adapter per inverter or trying to daisy chain them?

[kay]

I was going to daisy chain them, along my existing modbus cabling, however I don't mind having one modbus adaptor per inverter.

If I go with one modbus adaptor per inverter, do we think the modbus id is 247 on the S-series?

[Dave Foster]

The S series doesn’t support modbus in the way that your H1 does, it just transmits a regular timed data packet from its RS485 pins, it’s the same data packet that goes to the datalogger that connects to the cloud; there is no support for the S series in the Foxess modbus integration.

Because the protocols are different you can’t have the H1 and the S series on the same RS485 bus as one is a poll / response messaging protocol and the other a timed message frame.

It would be easiest for you to use the cloud interface for the S series https://github.com/macxq/foxess-ha this connects to the OpenAPI and gathers the 5 minute data samples the inverter sends to the cloud.

[kay]

Thanks Dave,

That makes sense as to why I can't see any settings. As it's a fairly dumb inverter, I might be best to use the modbus data from the SDM-120 meter instead as I don't have the cloud connected.