I have installed a new solar system and have been monitoring it from Home Assistant using a modbus and have noticed some weird behaviour that does not seem correct.

System Details:
Sunsynk 8kW Hybrid PV Inverter
2x Greenrich Lithium Battery 5kW 1.5C
14x Trina Solar Panel 455W

So the issue is below. From 9PM the rule is that the battery should not go below 60%. So once it hit 60% it was using grid power correctly. At 23:50pm it suddenly starts making turns almost every minute with the battery and grid.

Once it hit the 1pm rule of 50% SOC it correctly only used battery again.

What is causing it to switch between battery and grid between 23:50 and 00:30?

Edited November 29, 20223 yr by JohanHey

How are the battery dip switches configured?

Any chance of grid frequency instability that is causing the inverter to switch to battery for protection?

Below is all the settings on the inverter.
@P1000 Where can I see the dip switch configurations? @GreenFields I'm not familiar with grid frequency. Should I log those values to check?

Edited November 29, 20223 yr by JohanHey

23 minutes ago, JohanHey said:

Where can I see the dip switch configurations?

There are switches on the faceplate of the batteries. Underneath "ADS":

@P1000
Left battery is on dip 1 and right battery is on dip 2.

Edited November 29, 20223 yr by JohanHey

That looks correct.

Anyone have any idea how I can fix this?

18 minutes ago, JohanHey said:

Anyone have any idea how I can fix this?

Post a picture of your system work mode screen.

Edited November 30, 20223 yr by I84RiS

@I84RiS

28 minutes ago, JohanHey said:

@I84RiS

I'm not sure how to read SA - can you post it like this:

 

Edited December 1, 20223 yr by system32

6 hours ago, JohanHey said:

Try changing your 1st setting that runs from 1am to 5am to start form 0:00. It might seem silly but I have seen the system work mode do rather odd things when not starting at 0:00 in the 1st timeslot.

If I remember correctly there is also  YT video from Keith advising the same.

Will give it a try and let you know, although I think the issue is more on the battery's side on how it reports its SOC.

@I84RiS Had it start from 00:00 for a bit now and still doing the same.

It does really look like the battery SOC is not being reported correctly which is causing this issue

10 hours ago, JohanHey said:

@I84RiS Had it start from 00:00 for a bit now and still doing the same.

It does really look like the battery SOC is not being reported correctly which is causing this issue

Are you able to ready the data directly from the BMS, using PMODBUSTOOLS or something similar?

This should easily tell you what the battery is really doing