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Growatt Comms:
As per the table below, the Droplet communicates using pins 3,4 of SYS COM port.
Connection A is preferred to connection B.
Set Default Slave ID to 1.
4. RS485 from Growatt to USB into the Droplet:
The compatible Digitech adaptor is;
Document Number: QRG-Growatt Quick Reference Guide
Revision: Issue 1.0