Solis cloud and solis_modbus parallel work using WL data logger

[arco194]

Hi!
I tested solis_modbus and it works for my inverter: S6-EH3P10K-H with WL type datalogger connected via ethernet.
However when I enable it on home assistant, then it looses connection with solis cloud. So it looks that they can't work in parallel. After I restart home assistant then solis cloud takes over and home assistant integration is not getting data from inverter. I have changed settings to that fast pulling happens every 30 seconds and slow requests every 120 seconds. So it should not be that I overload the inverter, I guess.
Have anyone had similar problem?

[Pho3niX90]

solis cloud and modbus cannot work in parallel, see #152

Only way, is to use a waveshare device https://github.com/alienatedsec/solis-ha-modbus-cloud

[arco194]

Just to give other input. My solis inverter S6 had a separate RS485 input. So I bought one waveshare device (rs485 to ehternet) to set up as Modbus TCP server and was able to use this integration easy. And it works very well.

[thigger]

Does anyone know how this behaves if Solis send a firmware update? Presumably if they transfer the firmware over standard modbus commands it'll be OK; just wanted to check if anyone had any experience (presently I don't have soliscloud connected)

[ChrizZz90]

@thigger seems like Solis can't communicate with the inverter in this case. I have a support case with them right now and they can't connect to the inverter and can't update the firmware.

@Pho3niX90 what is the best way to disconnect the HA - inverter connection? Is it deactivating the device in HA?

[Pho3niX90]

@thigger seems like Solis can't communicate with the inverter in this case. I have a support case with them right now and they can't connect to the inverter and can't update the firmware.

@Pho3niX90 what is the best way to disconnect the HA - inverter connection? Is it deactivating the device in HA?

There is a switch to disable the modbus, if that doesn't work, you can disable the integration and restart home assistant. Just enable it again aftwrwards.

[0rangutan]

I had this issue too.
For a firmware update I disconnected the waveshare setup completely and plugged the dongle into the inverter directly.
Solis could then update the firmware. Once done I put it all back to how it was and all worked again.

[mijnham]

I'm wondering - is this still the case? I've enabled the modbus integration last night and today I see the sensors getting active & filled. At the same time, SolisCloud keeps being functional : I can log in & see the sensors registering the latest input.

So for me it seems, both systems can work in parallel - strange? Do take into account it is a wired datalogger (no waveshare setup) & I only have the inverter for 2 strings of solar, no batteries or generators. Rather simple use case.

[mijnham]

Ignore me, after 2 hours the system realized the dual setup & solis cloud did not register anything anymore. So it only worked in parallel for a small time. Probably the moment HA rebooted, the fun was over.

[ffierens]

Same here: sometimes the solis cloud seems to work together with HA even for longer periods, but then suddenly it stops working. I'm in a long discussion with Solis concerning a PV string that only produces 50% of power. And they always keep saying that they cannot fully follow the inverter via the cloud ...

[mijnham]

Yes, I see it is not a black/white situation: the modbus integration works fine continously. The Solidcloud works in parallel but seamingly in random periods it goes offline (as expected). I don't see a pattern yet, but for today it worked fine for about 60% of the time. Soliscloud being offline can be seen in yellow highlighted areas: then AC Output parameter from solis cloud becomes 0.

Note: I do like the modbus integration for being more fine-grained. I'll probably stop soliscloud integration anyway.

[RadioactiveMan56]

With the fast poll interval set to 15 seconds and normal and slow set to a very large number (effectively no polling) my S2 stick and RAI inverter have been behaving well for about a week now (touch wood).

[josu98]

I've been running both systems in parallell for months and it has been working fine.

[eqasxar]

I can't comment on other Solis inverters than my S6-EH3P15K-H, but I can confirm that both the Home Assistant (HA) Modbus integration and Solis Cloud can work in parallel and stably—at least in my setup. Here’s how I achieved it:

I connected the HA Modbus integration using the inverter’s existing RS485 port (specifically Pin 4 and Pin 5, as per the manual).
A crucial step that’s often overlooked: you must enable “Parallel Operation Mode” in the inverter’s settings. Only after activating this mode is the RS485 port enabled for use, and you will see “Master 1x” displayed on the inverter’s UI screen.
Without enabling Parallel Operation Mode, the RS485 port remains inactive, which can prevent simultaneous connections and cause communication issues. Double-check these settings to ensure both your datalogger (for Solis Cloud) and your Home Assistant integration can access the inverter concurrently.

[UDicke]

I connected the HA Modbus integration using the inverter’s existing RS485 port (specifically Pin 4 and Pin 5, as per the manual).

Thank you @eqasxar for this informations. Can you describe the connection more in detail? Do you use a waveshare RS485 to TCP/IP modul for this?
Thanks! Ulrich

[eqasxar]

To correctly integrate, refer to @Pho3niX90/solis_modbus.

Connection instructions can be found in the Solis manual. In my setup, the connection is labeled as "RS485 RJ45 Third-party external devices." As previously mentioned, it is essential to enable Parallel Setting > Master.

I am using an RS485 to LAN converter (MOXA), which is an industrial-grade converter. However, I have also tested with Waveshare and generic (no-name) converters from Aliexpress. I do not recommend using the cheapest options, as their internal quality is uncertain—at minimum, choose a converter from a recognized brand.