Sofar Solar KTL-X Inverter: RS485 MODBUS Integration with Domoticz - Setup & Tips [90]

starob wrote:

Didn't we already rewrite this topic as "ArturHome"?

hehe I guess so

Hello, can you connect a solar sofar with CCA Tigo? So that you can view the inverter in the Tigo app.

xury wrote:

Have you read Readme.md on github? Everything is described there and how.
Install python modules
You need to determine the IP of your LSW3 and enter it in config.cfg
Unlock MQTT and HA by typing 1 instead of 0
Set MQTT in configuration.yaml
Autodiscovery should show the entities by themselves if everything is configured correctly.

Hello
I have a server on debian 11 doing something at home.
I launched Michalux's soft col on it and it shows the data from the sofar nicely.
I would like to put HomeAssistant on it, but all the rest, i.e.
Install MQTT, INFLUX and GRAFANA from Debian or from HA?
Please guide me, greetings.

I have it installed from Debian. There is more control over services.
I only have HA in docker.

Thanks.
So you can do it anyway, I'm not strong in pure linux, I mean simplicity of configuration.
greetings

Hi.
If anyone wants to test and has Shelly3EM, I have prepared a solution that downloads data from this device and uploads it to InfluxDB (without using the cloud, i.e. everything on premise ). The data can be married with the data from Sofar and then you can see how much the house pulls, and how much it gives back and when
Sofcik here: https://github.com/MichaluxPL/shelly3em

starob wrote:

I have an inverter and an additional two-way counter SDM630 connected to the modbusWifi Elfin EW11 converter.
I wrote a plug-in for domoticz in python, it will display and record only the parameters I am interested in.
You won't get much out of the original logger (whether wired or WiFi) ... such a gadget for the needs of the cloud.

I also use EW11 and managed to communicate with the SDM630 without problems, but I have a problem with SofarSolar.
Tests with Modbus Pool app and others and only "Holding registers" works. With "Input registers" I have a timeout.
I have no experience with modbus and I don't know where the problem is

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ynst2000 wrote:

I also use EW11 and managed to communicate with the SDM630 without problems, but I have a problem with SofarSolar.
Tests with Modbus Pool app and others and only "Holding registers" works. With "Input registers" I have a timeout.
I have no experience with modbus and I don't know where the problem is

Normally the CRC in Modbus RTU is 2 bytes. The first byte is Hi, the second is Lo. SofarSolar uses back - the first Lo, the second Hi. Maybe that's why you can't communicate?
I am using a USB-RS485 converter

together with the terminal on the computer.
CRC16 can be counted by online calculator
For example, if you want to read the serial number of the inverter, you must send the command 01 04 20 01 00 08 AB CC (HEX format)
Here: 01 - inverter address
04 - function number (Read inverter holding register information)
20 - Hi register address
01 - Lo register address
00 08 - number of registers to read
AB - Lo byte CRC
CC - Hi byte CRC

If you need to read the input registers, it's function number 03.
For example, it is necessary to know the insulation resistance of the cables from the panels. Register #28 needed to be read. We send in inverter 01 03 00 28 00 01 04 02
Here
01 - inverter address
03 - function number
00 - Hi register address
28 - Lo register address
00 01 - number of registers to read
04 - Lo byte CRC
02 - Hi byte CRC

I have a proprietary program to read all parameters of the inverter. But the program is Chinese, everything is written in hieroglyphs. If needed, we can share it.

P.S. Sorry for mistakes. I don't really write in Polish because I'm from Ukraine.

Good morning,

Gentlemen, I have this problem with KTL 20 HYD, actually two and I am looking for someone who will help (I will gladly pay):

1. communication with the DTSU666 energy meter (included with the inverter) via the LoRa USR-LG206-P radio bridge - I think I’ve tried everything and I can’t connect it. The cable works fine. Ask if anyone has tested it, has an idea or any other tested solution for a radio bridge with a counter for this inverter?

2. setting the operation of the GTX3000 energy storage for the C13 tariff so that:
a) charging took place during the day in off-peak hours only from PV energy if there is sunshine (not from the grid) and discharging only during the afternoon peak hours. And
b) the next landing took place at night off-peak (from the grid) and the discharge took place during the morning peak hours, but only at times when there is no solar energy to meet the own needs.
No matter how you set it, warehouse operation modes 1-3 described in the manual do not provide the intended functionality, only mode 4 (passive mode) remains. And here is a request for help in the selection and configuration of an external device with RS485.

A polite request for help - and thanks in advance.
Radek

Hello
I have Saia modbus meter and SOFAR KTL6.6 inverter
as you know, the sofar has transmission parameters of 9600/8/n/1.
I have connected via modbus to siemens s7-1200 via Chinese MODBUS RTU to TCP converter.
The counter selects the transmission parameters itself, but when the parity is NONE, the stop bits must be 2. I can't change it and I either talk to the sofar or the counter.
Is it possible to somehow change the sofar to 2 stop bits or some other parity?

fphuralf wrote:

Hello
I have Saia modbus meter and SOFAR KTL6.6 inverter
as you know, the sofar has transmission parameters of 9600/8/n/1.
I have connected via modbus to siemens s7-1200 via Chinese MODBUS RTU to TCP converter.
The counter selects the transmission parameters itself, but when the parity is NONE, the stop bits must be 2. I can't change it and I either talk to the sofar or the counter.
Is it possible to somehow change the sofar to 2 stop bits or some other parity?

I do not see the possibility of changing the transmission parameters of the inverter, unfortunately. In one network, the meter and inverter with different transmission parameters will not work.
If it is not possible to change the transmission parameters in the meter, there are the following variants:
1 - two separate Modbus RTU - Modbus TCP converters. The first to the meter with the transmission parameters 8-n-2, the second - to another device with the parameters 8-n-1.
2 - mount the converter next to the counter, transmission parameters 8-n-1 8-n-2 (can be done on AtMega, Arduino).
3 - replace the counter with another one with 8-n-1 transmission parameters.

spin722 wrote:

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ynst2000 wrote:

I have a proprietary program to read all parameters of the inverter. But the program is Chinese, everything is written in hieroglyphs. If needed, we can share it.

P.S. Sorry for mistakes. I don't really write in Polish because I'm from Ukraine.

Hi can you send this reading program to email? j.swierk(_at_)gmail.com
Thanks.

I already sent.

spin722 wrote:

I already sent.

nothing happened

You can download the program here
https://drive.google.com/file/d/17pgQ1-bF7y-p3OIJGltetMTUOY33MlnR/view?usp=sharing

Please help me how to activate rs485 connector in sofar solar inverter

Added after 2 [hours] 52 [minutes]:

Hello, please help me how to activate the rs485 connector 8/8 ktl x inverter

Added after 55 [seconds]:

Hello, please help me how to activate the rs485 connector 8/8 ktl x inverter

Mk25121976 wrote:

Hello, please help me how to activate the rs485 connector 8/8 ktl x inverter

The RS485 port of the inverter is always active. The inverter acts as a slave device.
In order for communication to take place, the master device that will read the inverter must be set correctly.
What is the master device?

What is a master device

The master device is the polling device. The inverter itself will not send anything.

I have a chint dtsu 666 counter
And solarman apps

Mk25121976 wrote:

What is a master device

Modbus RTU Master - this device (in English device ) initiating communication and sending queries to Slave devices.
Modbus RTU Slave devices respond to queries sent by Master devices.
Lipej first read what is the Modbus RTU communication protocol and how it works. Then try to make communication after Modbus RTU.

I have connected inverter with chint dtsu 666 meters
via rs485 port

Mk25121976 wrote:

I have connected inverter with chint dtsu 666 meters
via rs485 port

The chint dtsu 666 counter acts itself as a Modbus Slave (according to the manual for the lichnik link ). He can't read the inverter.
To read the meter together with the inverter, you need to add a Modbus Master to the network. It could be a computer, a controller, or some other device.

PS Why do you want to match the meter to the inverter? The inverter already has a counter in it. It only needed to read it via Modbus RTU.

And maybe a phone?
So connect your computer?

Mk25121976 wrote:

And maybe a phone?
So connect your computer?

I think you can read on your phone too. On the computer, I think it will be better. It all depends on what you need. But as for the phone, you must use the Wi-Fi, Bluetooth, USB or RS232-RS485 converter together with the appropriate application for the computer.

Massacre
Thanks for your help but I still don't know how to do it

Mk25121976 wrote:

Massacre
Thanks for your help but I still don't know how to do it

Read the thread from the beginning - there are several solutions.

Michalux wrote:

I only download what is issued by MODBUS on individual registers.

Theoretically, you're right, but when I fetch directly, the data is returned:

and when the call goes from the code, nonsense comes out:

is it the fault of the logger?

Emi_B wrote:

and when the call goes from the code, nonsense comes out:

Yes, it's the logger's fault.. this integration in python does not check the reasonableness of the data.
Although in your case it doesn't work at all (unless it's incidental).
Try disabling cloud streaming.

Hello everyone.

The issue of reading data from Sofar inverters via the LSW3 logger appeared in the thread.
It is already known that it is possible to download data by sending a local TCP query to the logger on port 8899 with the appropriate frame.

The question is has anyone tried to implement the inverter functions in the same way?

I am specifically interested in the function of limiting power to a given %.
The modbus specification generally provides for this, the question is whether the LSW3 will also be able to handle it?:

Quote:

Active power &Over/Under voltage Power Derate Parameter(0x0900-0x093F)

0901 ActiveOutputLimit U16 0.1% 0 1000 RW ??????? The percentage of active power output Installer

Maybe knowing this and having already configured the connection at home, someone would be tempted to make a test?