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Karsten Bartwkowiak asked

DummypvInverter does not work anymore


I‘m using a Multiplus 24/3000/70-50 with a CCGX in ESS mode for my PB traction battery. I have a PV inverter Kostal Piko 7.0, I‘m using a raspberry pi and FHEM to read parameters like the availialbe solar energy and sent it to the ccgx by using modbus unit 20 and registers 1029, 1033 and 1037.

I had to edit attributes.csv on the ccgx on ssh login, add the pvinverter parameters and set the registers to „w“ writable. To receive the data, I had to start a python script called

This all worked fine using fimware V2.05. I updated to 2.93 recently, and the method above does not work anymore. I adapted to the new phyton version, but the filesystem is mounted read only, so I cannot modify attributes.csv to make the registers writeable.

Is there any alternative way to get data from my piko PV inverter to CCGX?

Thanks and happy Easter from Baiersdorf, Germany


CCGX Color ControlModbus TCPmodifications
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Related Resources

CCGX Product Manual

CCGX Product page

Modbus TCP Basics

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