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Good day everyone, 

I have installed a 3kw SPF3000TL HVM 24v Growatt inverter with Pylontech UP2500-24v battery and 2 X 400w panels on this system. 

I believe I need to make up a different comms. cable and have already tried different options in made-up cables. As a 63y old person, I know nothing to very little of what settings my system needs to be, however after trying 4 x different installer to help (at a cost), the system is still not communicating between the Battery and Inverter. Could you please advise what cable I should have made up as well as what  ports they must be plugged in. Also, the setting on the Inverter after installing the suggested Cable will help please.

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