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My modbus based SolArk 12k monitoring has been working for 20 months now with no reliability issues at all. I have 2 inverters and each is connected via their own RS485 bus. Last night however, both stopped responding to all serial communications at the same time... is anyone else seeing...

Yeah, I just got my Sol-Arks installed and was indeed mistaken. Scanned every single 64k TCP port and none are open. Worse, each inverter is hard-coded to modbus address 0x01, so I need multiple RS485 transceivers... That said, the OPs register maps are perfect and my Influx DB is filling up :)...

I have 2 SolArk 12ks ordered but not installed yet. From what I've read, I'm pretty sure they support modbus over TCP, both WiFi and Ethernet, so you can skip all the RS485 nonsense. They claim to support SunSpec draft (v4) in the manual, which is an open industry specification, not proprietary...