Yuri

I looked at it this weekend and it is not working Modbuspoll gave me a error checksum

Why not just use the esp32 all the work have been done?

What I will be testing is more like using 2x modbus poll at the same time on 1 meter only the meter will have a slave id...

I have not manage to do it I will have a look at it tomorrow

Lets first see if two will work...

If you are using parallel inverters only the master gets a CT/power meter input . The info is sheared with the slave over canbus master/slave connection cable with battery BMS

Yes you can tee them Normally you will have a server and client the server has the slave address and the client is reading/ writing info You will have one client with one or more servers in normal use I want to test 1 server with 2 clients ... You remove the CTs Normally thy say max number of servers 32

RS485 (Modbus RTU) you connect daisy chain On my PC i have modbus pole software and will see if my inverter will still get a reading when looking up registers with PC

Yes, Centurion South Africa I was using the 8KW manual... Yes the Chint meter is using RS485 comms but if you read the Deye manual u will see Eastron is also compatible You need the Deye manual to get the meter_RS485 connection I will test for you this weekend If it is possible to read the meter from 2 different devices simultaneous this is the Eastron meter I am using and where I got it https://www.aliexpress.com/i/32845403260.html Yes the main supply to the house will feed through the power meter

no problem

Remember the watt loss will go up and down depending on the current My setup is 2x 8KW Sunsynks with 44x 600W Canadian solar panels the inverters can only do 20800W but my panels are 26400W if you over panel it will just clip the excess The CT wires must only be max 10M If it is long distances there will be better accuracy and all inverters will get the same reading The Eastron one that I am currently using is 100A If you want to try my Chint one you are welcome I am in Centurion If you want a custom CT try V.A.C. Electrical Suppliers thy can make custom CTs

Same size and firmware is needed to parallel

The low current higher voltage DC is not a problem on long runs There is also the inverter input (string inverter) on Sunsynks if you want to send AC long distance as for the CT try to use a power meter (Chint or eastron) paralleling the RS485 RS485 can go to 1Km

Why not sell the 3.6KW and 5,5KW then get a 8,8KW Parallel the 8,8KW next to each other with same battery and CT on the master AC cables can be long if volt drop is calculated...

The us2000 with out a C can only do 1 master and 7 slaves the us3000C and up5000 can do 1 master and 15 slaves

The only way to hold and electrical contractor accountable is with an AIA https://sapac.co.za/blogs/news/20230711-0925-bravoscan-electrical-approved-inspection-authority#:~:text=An AIA is a private,and compliance of electrical installations

The only way to get action is getting a AIA out to inspect the installation only a AIA’s evidence can be used in court AIA( approved inspection authority) contact department of labour…

I am currently using the TSE geyserwise with WIFI integrated into home assistant with local tuya but I am running it on inverter. Before I was using home assistant it was off the inverter and working well with the smart life app If you are reading your inverter back into home assistant I am sure you can switch it off when the inverter is seeing grid off.

https://github.com/slipx06/Sunsynk-Home-Assistant-Dash/blob/main/ESPHome-1P-Sunsynk-Deye.yaml This is the single phase inverter yaml I was using it with this Here is examples of integration https://www.home-assistant.io/integrations/modbus/

I have played with this converter that is working and cheap from micro robotics https://www.robotics.org.za/communication-wireless-Industrial/serial-to-ethernet-converters/USR-DR302 You can use Slipx's yaml file for the ESP32 to read the registers used...

I am using the brown and white/brown for my RS485 network on my 485 RS-485 TO TTL CONVERTER MODULE Then I just joined(soldered) all the brown wires together next joined (soldered) all the brown/white wires together you can see the white ethernet cable is from my esp32(rs485 to ttl converter) one of the black is for master rs485 and one of the black ethernet cables are for the slave rs485

daisy chain RS485 think of the RS-485 Master as the esp32 device 1= master sunsynk device 2 = slave sunsynk

Yes you need to parallel esp32, master and slave rs485 cables

Have you made a daisy chain link from the master to the slave rs485 ports?

I have made a better YAML 8KW Sunsynk Master-Slave .txt I have added lots of the power ,current and energy registers