Support for WEG SIW200G inverter?

[LucasTor]

I know SIW200G inverters are made by FoxESS, and the FoxESS app can be used to connect/control them, but I did not find the exact FoxESS model that would represent this inverter, do you guys know if this integration can communicate to it via modbus?
This is the inverter in question
Thanks!!

[canton7]

I've no idea I'm afraid. I can't even find an installation manual which would show what connections are available on the bottom (although I'm on mobile and didn't look too hard).

If you've actually got one, the thing to do would be to see if there's an ethernet socket / RS485 connector you can connect to, and start probing it.

If not, we'd need to know what foxess model it was similar to. Only some of the foxess inverters talk modbus - the T series just spits out information over serial for example.

[LucasTor]

I still don't have one, the company I bought it from gave me a 60 day deadline to install it, but I checked the manual for it, and it has a RS485 port on the bottom, which I plan on using with an EW11A to send data to Home Assistant (I would use USB but it's too far from my server)
I was able to find it's protocol online and it's the same as the SIW400G, which is the FoxESS T10 model exactly, so should I assume I can use this integration as mine has the same protocol as the T10?

[canton7]

No, the T series doesn't talk modbus, and isn't supported by this integration. The integration to talk to T series inverters is https://github.com/assembly12/Foxess-T-series-ESPHome-Home-Assistant (although you could write your own to avoid having to go the esphome route: the inverter just spits out information periodically)

[mattwilson1066]

I'd love to know how to read the data that the inverter spits out without needing to use the ESPHome option, I have an F4600 inverter (and an H1-6.0-E which is connected modbus and works like a dream). I have wired up to the dongle, so I have a feed from the A/B of the RS485, but I am not sure what i'd need to do as the next step for collecting and displaying the data. I have a https://www.waveshare.com/usb-to-rs485-b.htm which I planned to connect the A/B connection directly into, but not sure what next...

[LucasTor]

@mattwilson1066 I've found the thread in which the esphome project came from, in there there's a guy that setup elfin ew11 with node-red to integrate the inverter data in to home assistant, I'm not sure if node red can read from USB tho, as I never used it
This is the thread where they created the ESPhome project: https://community.home-assistant.io/t/foxess-inverter-modbus/459313/48
This is a "lib" I found that implements USB Serial data with node red: https://flows.nodered.org/node/node-red-contrib-serialport-rs485
Maybe if you merge those 2 things you can read from USB and parse it into Home Assistant, if you are interested in tinkering with node red

[LucasTor]

Thanks @canton7, I'll likely go the esphome route as I'm already familiar with it and have a hand full of devices, I appreciate your time

[canton7]

@mattwilson1066 How good is your Python? If you're comfortable programming it's a pretty easy job to open the serial device, receive the data, parse it, and publish the various values to a set of sensors (and quite frankly I have no idea why there's a (complex) ESPHome solution but no (simple) solution using a USB device). If you're not comfortable with that, it's probably going to be quite hard I'm afraid.