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I decided in the end to chop up an Ehternet cable as originally suggested, wired into the pins as suggested. Easily done, and immediately picked up in home-assistant. This stepped is glossed over (arguably because it's so easy in reality). The steps are: 1 - cut end off ethernet cable 2 - strip wires on pin 1/2/3 3 - connect wires to modbus serial usb converter I think a lot of the issues/posts i see in other threads relate to not knowing if the home-assistant is ready to collect the data, and therefore it could be eiter cable/software config/converter. For me, starting with a cable guaranteed to work meant it was just plug and play.

I'm UK based, doing some shopping now. Getting these: https://www.amazon.co.uk/gp/product/B07W4V6W6W/ref=ewc_pr_img_1?smid=A2XY2J3FRQ9IR9&psc=1 Do i need ehternet cable or just a few cables to wired from the rs485 adapter to specific pins of the rj45?

Thanks for the input. To avoid confusion creating the cable i opted to remove the wireless dongle from the inverter and connect a cable via the rs232. I have a realtime connection now using home-assistant. Because this is a managed plant i want to reconnect the wifi dongle at some point so i'm going to buy some equipment for creating the cable. I'll keep you posted on progress switching from rs232 to rs485. Slowly but surely getting there!

OK, So i'm getting write errors, so step forward from before. Mapping values in modbus has my mind blown, if anyone has done this any help would be greatly appreciated. I think the Raspberry Pi repo has this done already so it's "almost" plug and play but modbus poll for windows not so much! I've attached a reference file but can't see how this maps in modbus poll: https://www.modbustools.com/modbus_poll.html I'll keep reading. sunsynk_modbus - no chinese.docx

Yes thanks got the cable and as expected i've got timeout errors so it it likely is wired incorrectly? I apreciate it's clear to a lot of people in this thread: and here: https://pypi.org/project/sunsynk/ but not to me. This forum post suggest sunsynk uses pin 7 and 8: https://energytalk.co.za/t/sunsynk-pylontech-rs485/988 The cable i have uses pin 4 and 5. This post: https://www.sunsynk.org/forum/techical-support/use-of-eastron-modbus-meter-instead-of-ct/dl-0db695ea-c6a4-4dbe-9a9a-5d391bb5f0ad?postId=62978bce4a9e110012c0ce86&searchTerm=rs485 suggests from the word document that pins 4 and 5 are right, so the timeout error im getting is a configuration issue. I continue to dig. I'm currently using Modbus poll on windows 10 as i'm waiting for a raspberry PI to arrive to install home assistant. Although the cable *may* be correct, the timeout error suggest otherwise, though it does say "could be cause by wiring or configuration" which as error descriptions go isn't that helpful.

Hi, Thanks for the quick responses: Yes i've read this aad again the steps that connect the ethernet port seem glossed-over. I believe you need to wire that yourself? This is the bit that appears to be taken for granted, you've linked a device that clearly isn't an rj45 connection. Since this cable actually has the RJ45 connector to USB it feels like this has done the work of re-wiring an RJ45 connector to the expected in/out of the inverter. I'll start buying things and trying to connect them. I think the confusion stems from the devices that are clearly not RJ45 connectors?

Hello, I'm very new to solar and home automation. I've got a SunSynk 8kw inverter, 1 SunSynk battery attached and a SunSynk wireless dongle. I want to set up a connection from the inverter to a Raspberry PI to run home assistant. I've done a lot of reading, but seem to be missing something. The RS485 Port on my SunSynk system appears to be Ethernet: I'm stuck on where i connet to the inverter to the Raspberry PI. I've found cables like these: https://amzn.eu/d/aXz53Cn which appear at least to have the right Ethernet connector. I'm failing to see how the cables/suggestions i see like this https://amzn.eu/d/ab1Nvkw would connect into the inverter without additional steps. Is an additional cable required to run from the USB attached cables into the inverter? If so what is the cable and can they be purchased? Is someone able to point me in the right direction? Thanks!

I'm new to the forums and solar and hugely impressed by the automation achieved throughout here. Having just had the set up done for me, I'm reticent to change anything (including removing the sunsynk logger) in order to connect directly locally. Similar to idb my preference would be to pull from an API at intervals. Failing that has anyone managed to pull data from the sunsynk logger at anything faster than 5 min intervals which is what the web front-end uses as the interval for pulling data? Any thoughts and suggestions are more than welcome, i'm not interested in editing information in the inverter from this connection i want, it's purely for automating appliances.