S2-WL-ST USB

[dxmone]

Hi, i just got my hybrid inverter and it's using a USB connection instead of the old 4 pin. Is it possible to do this solution with that inverster or am i screwed? Model: S6-EH3P10K-H

[dxmone]

I found out that the inverter has a RS485 dedicated port. So i guess i could connect direct to that instead of the logger?

[alienatedsec]

Use ModbusTCP section and Waveshare IP and port

[alienatedsec]

@dxmone

[alienatedsec]

The ModbusTCP support started in version 0.3.0 https://github.com/ed-chemnitz/qmodbus/releases/tag/v0.3.0

[dxmone]

Thanks, i will try that out soon. My inverter has some problem that the installer must fix before i can start messing around.

[alienatedsec]

@dxmone any success?

[dxmone]

I got it to work just fine now. I had some wiring issues but now it's working. Thanks for the help. Den mån 29 jan. 2024 kl 18:39 skrev alienatedsec ***@***.***>:

…

@dxmone <https://github.com/dxmone> any success? — Reply to this email directly, view it on GitHub <#28 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AITHS5KIXQG2VLQZ25QILN3YQ7NERAVCNFSM6AAAAABCABDNLKVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DEOBXGYZTE> . You are receiving this because you were mentioned.Message ID: <alienatedsec/solis-ha-modbus-cloud/repo-discussions/28/comments/8287632@ github.com>

[alienatedsec]

@dxmone
How did you wire the S2-WL-ST USB datalogger? Can you share more details?

This could be useful for @mdeakin99 as per #31

[dxmone]

I wired it as the manual says. And then just connected A to A on the waveshare and B o B. Then it just worked. After using the settings provided by alienatedsecs guide. Den lör 17 feb. 2024 kl 00:22 skrev alienatedsec ***@***.***>:

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@dxmone <https://github.com/dxmone> How did you wire the S2-WL-ST USB datalogger? Can you share more details? This could be useful for @mdeakin99 <https://github.com/mdeakin99> as per #31 <#31> — Reply to this email directly, view it on GitHub <#28 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AITHS5JXES2EGYBAK6N5J43YT7S45AVCNFSM6AAAAABCABDNLKVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DIOJXG44TK> . You are receiving this because you were mentioned.Message ID: <alienatedsec/solis-ha-modbus-cloud/repo-discussions/28/comments/8497795@ github.com>

[alienatedsec]

@dxmone are you saying that the USB pinout on your inverter can be matched with the 4-pin socket from this project?

[dxmone]

Sorry i forgot that this question was about the usb device. I found out that my solis inverter had a dedicated rs485 port so I used that one. lör 17 feb. 2024 kl. 11:02 skrev alienatedsec ***@***.***>:

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@dxmone <https://github.com/dxmone> are you saying that the USB pinout on your inverter can be matched with the 4-pin socket from this project? — Reply to this email directly, view it on GitHub <#28 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AITHS5LAU4I7DU43NHB6AM3YUB55BAVCNFSM6AAAAABCABDNLKVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DIOJZHEYTI> . You are receiving this because you were mentioned.Message ID: <alienatedsec/solis-ha-modbus-cloud/repo-discussions/28/comments/8499914@ github.com>

[Sabnock2210]

The instructions are very good. I just don't understand them properly. According to the sketch, I need two Waveshares? a client and a server? then do I need an adapter for usb for the datalogger on the client? how do I tell the Waveshare that it is a client or server? Or do they work correctly if I set them up straight away?

[alienatedsec]

@Sabnock2210 Building based on this project requires some technical skills, and if those are not present, some self-learning by reading manuals and following some high-level instructions. Therefore, my recommendation is to start slowly and follow the diagram, search Google and eBay for terms listed in https://github.com/alienatedsec/solis-ha-modbus-cloud?tab=readme-ov-file#devices-and-cost

Besides that, consider a bigger box to fit all devices without hassle, as mine seems slightly too small.

[Sabnock2210]

I'll order the components and see if it works. I'll get in touch again then. Thank you for the support

[Sabnock2210]

The components are there. Unfortunately I can't get the firmware on it, I'm doing something wrong. VirCom says Flash write fail

[Sabnock2210]

Hello,
For now I've just set up the server. It's running!!!! Now I'm not looking for a solution to connect the S2 stick to the Waveshare with USB. I got a USB adapter to cable. Now connect 5v and then it should work

[DG-Lt]

Hi everyone,

Adding my experience to the conversation. Might be useful to others.
My inverter: Solis S6-EH3P20K-H
Solis Dongle: USB S2-WL-ST

I have been using Solis Modbus integration on HA targeted to the Dongle IP. This way I got all the Modbus data to HA. Also the Solis Cloud App was sometimes refreshing the data as well (intermittently).

Yesterday received my Waveshare RS485 Gateway. and decided to switch to that dedicated RS485 as described here.
Spent some hours trying to establish the connection through the Blue and Blue/white wires. it did not work. was already thinking that the port was disabled, and not seeing any way to enable I thought I will need to contact Solis tech support to do that.

This is where I opened my inverter manual...

Switched to the Orange pair and it started working...

Connected
Solis Orange/White -> A on Waveshare gateway
Solis Orange -> B on Waveshare gateway

So the message is: be aware that different Inverters might have different pinouts... Even of the similar model series...

[DG-Lt]

Another update.
Yesterday I finally spent time on removing the integration through USB S2-WL-S and switching the Waveshare on dedicated RS485 port on my solis S6-EH3P20K-H
All went smoothly: first I removed the device with the datalogger IP. then added the device with the Waveshare IP. and renamed the device to the same that I had before

at first glance all seemed good.: same entity names and preserved statistics.

but today I noticed that out of many sensors some of them started reporting data differently:

Battery Energy sensors seem to be off by 100x. or 10x
Seems that there is a bug somewhere. either inverter or HA integration.

This is messing up with my energy dashboard :(

[alienatedsec]

@DG-Lt The port you started using will likely report data with different metrics and integrations will need amending for such a method.

The best would be to test it with tools like QModBus, query all trouble registers and amend the integration parameters thereafter.

[DG-Lt]

It turned out that the problem was caused by the fact that I have chosen Waveshare as a connection type when added the device:

It was explained here that this should only be selected in some rare cases...

[fastbike]

Hi, i just got my hybrid inverter and it's using a USB connection instead of the old 4 pin. Is it possible to do this solution with that inverster or am i screwed? Model: S6-EH3P10K-H

Hi I've just followed through this discussion. I've got the same inverter (S6-EH3P10K-H) but it has an AU suffix which is for the verification for the Australia / New Zealand market.
I'm trying to get this to work - initially just trying to read the Modbus registers using the Modbus Poll tool.
I can connect using a Waveshare RS485/ETH(B) bridge.
I keep getting timeouts. I've tried the blue/white wire pairs and the orange/white wire pairs and there is no difference.
I've followed the instructions in the main part of this repo but am out of ideas.

Am I screwed ?

[Sabnock2210]

Hello, Unfortunately, I can't get that to work either. I only have one Waveshare connected. It worked for a few weeks. Now I haven't been able to connect for a long time and only use the portal. I haven't found a solution yet to reconnect the USB stick. Von: David Moorhouse ***@***.***> Gesendet: Mittwoch, 8. Oktober 2025 07:11 An: alienatedsec/solis-ha-modbus-cloud ***@***.***> Cc: Sabnock2210 ***@***.***>; Mention ***@***.***> Betreff: Re: [alienatedsec/solis-ha-modbus-cloud] S2-WL-ST USB (Discussion #28) Hi, i just got my hybrid inverter and it's using a USB connection instead of the old 4 pin. Is it possible to do this solution with that inverster or am i screwed? Model: S6-EH3P10K-H Hi I've just followed through this discussion. I've got the same inverter (S6-EH3P10K-H) but it has an AU suffix which is for the verification for the Australia / New Zealand market. I'm trying to get this to work - initially just trying to read the Modbus registers using the Modbus Poll tool. I can connect using a Waveshare RS485/ETH(B) bridge. I keep getting timeouts. I've tried the blue/white wire pairs and the orange/white wire pairs and there is no difference. I've followed the instructions in the main part of this repo but am out of ideas. Am I screwed ? — Reply to this email directly, view it on GitHub <#28 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGQYP5MGYXSZHOIWTL3KPR33WSMFPAVCNFSM6AAAAACISVSH5WVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINRSGE4DENY> . You are receiving this because you were mentioned. <https://github.com/notifications/beacon/BGQYP5PSMUWWWGVW32F3Z2D3WSMFPA5CNFSM6AAAAACISVSH5WWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA34OIG.gif> Message ID: ***@***.*** ***@***.***> >

[fastbike]

Which seems very strange because other people are reporting it working.

I have tried disconnecting the USB datalogger and plugging the RJ45 cable into the RS485 port. This is connected to the Waveshare device. I can see the activity light on the waveshare flashing as the ModbusPoll software tries to read the registers but the software keeps showing a time out.
Also I think the USB stick is actually using a USB protocol so despite users on other forums saying it should work as a client of another waveshare modbus bridge I can't see that working.
I have raised a service desk ticket with Solis and will report back if I get an answer.

[Sabnock2210]

That would be great. I would also like to make progress in this area. Von: David Moorhouse ***@***.***> Gesendet: Freitag, 10. Oktober 2025 01:51 An: alienatedsec/solis-ha-modbus-cloud ***@***.***> Cc: Sabnock2210 ***@***.***>; Mention ***@***.***> Betreff: Re: [alienatedsec/solis-ha-modbus-cloud] S2-WL-ST USB (Discussion #28) Which seems very strange because other people are reporting it working. I have tried disconnecting the USB datalogger and plugging the RJ45 cable into the RS485 port. This is connected to the Waveshare device. I can see the activity light on the waveshare flashing at the ModbusPoll software tries to read the registers but the software keeps showing a time out. Also I think the USB stick is actually using a USB protocol so despite users on other forums saying it should work as a client of another waveshare I can't see that working. I have raised a service desk ticket with Solis and will report back if I get an answer. — Reply to this email directly, view it on GitHub <#28 (reply in thread)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGQYP5PCRVIKPKO4BY5B2633W3YGBAVCNFSM6AAAAACISVSH5WVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINRUGE4DINQ> . You are receiving this because you were mentioned. <https://github.com/notifications/beacon/BGQYP5NCIKN2GPQN3STXT3T3W3YGBA5CNFSM6AAAAACISVSH5WWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA35VLM.gif> Message ID: ***@***.*** ***@***.***> >

[fastbike]

That would be great. I would also like to make progress in this area.

I've made some progress. I created an installer account with Solis, which gave me an organisation ID.
I then used the SolisCloud web page (Device | Modify Info) to set the Organisation Code.
After logging out from web page I was able to login using the installer account and then go the the Inverter Control page.
I now have access to the Parallel settings function - changing the Physical address ID to 2 seems to have enabled the RS485 port.
I'm now getting a different set of errors on the Modbus Poll tool, but at least it seems to be communicating.

[Sabnock2210]

I think that's a coincidence. Parallel settings are designed to connect multiple identical inverters. Von: David Moorhouse ***@***.***> Gesendet: Samstag, 11. Oktober 2025 02:16 An: alienatedsec/solis-ha-modbus-cloud ***@***.***> Cc: Sabnock2210 ***@***.***>; Mention ***@***.***> Betreff: Re: [alienatedsec/solis-ha-modbus-cloud] S2-WL-ST USB (Discussion #28) That would be great. I would also like to make progress in this area. I've made some progress. I created an installer account with Solis, which gave me an organisation ID. I then used the SolisCloud web page (Device | Modify Info) to set the Organisation Code. After logging out from web page I was able to login using the installer account and then go the the Inverter Control page. I now have access to the Parallel settings function - changing the Physical address ID to 2 seems to have enabled the RS485 port. I'm now getting a different set of errors on the Modbus Poll tool, but at least it seems to be communicating. — Reply to this email directly, view it on GitHub <#28 (reply in thread)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGQYP5K2W7HU677BTYWGBQ33XBD3XAVCNFSM6AAAAACISVSH5WVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINRVGE3TSMA> . You are receiving this because you were mentioned. <https://github.com/notifications/beacon/BGQYP5KZMR37WCKWOLQEFPL3XBD3XA5CNFSM6AAAAACISVSH5WWGG33NNVSW45C7OR4XAZNRIRUXGY3VONZWS33OINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQA36IY4.gif> Message ID: ***@***.*** ***@***.***> >

[fastbike]

I think that's a coincidence. Parallel settings are designed to connect multiple identical inverters.

Indeed it was. The problem was the software I was using to test, QModBus could read a known register correctly.
It's early days but has been running overnight ok.