Hi Guys, 

I have successfully Connected my 5kw Sunsynk inverter to solar assistant. 

I have also connected the battery through the RS232 port directly to solar assistant. But solar assistant shows the capacity as only 70ah and not 100Ah. This is a Sunsynk 5.32kwh battery. It is connected to the RS232 port as per the instructions on the Solar assistant website. https://solar-assistant.io/help/battery/sunsynk. 

So my SOC is showing up wrong in the attached screenshot because the battery capacity is wrong. It should be 84% and not 120%. 

When I select "use inverter values“. Everything seems fine. All the other values also tie up with what the inverter is showing. Only the battery capacity that is wrong. 

Has anyone else successful connected this battery directly to solar assistant? 

 

 

Some of these batteries have issues like this. I ended up just using the Inverter Values. 

I'd suggest logging this with the SA dev and hopefully they patch it in a future release

18 minutes ago, mzezman said:

I'd suggest logging this with the SA dev and hopefully they patch it in a future release

Agreed. It may be a SA software calibration issue with this specific battery type. Maybe they haven't gotten around to fine tuning the data interface or no one else has actually reported it to them yet. 
I had a calibration issue with my Inverter in the beginning as well and Pierre fixed that in the next Beta release.

I have a similar issue (with the same set up as yours), although my battery reports capacity as 98ah - so at full, my dashboard shows 105%. Not too bad but just off enough to be annoying.

Just out of interest, are you guys on the Beta Program?
If not, perhaps give that a try in the meantime.
https://solar-assistant.io/help/updates/beta

2 hours ago, mzezman said:

Some of these batteries have issues like this. I ended up just using the Inverter Values. 

I'd suggest logging this with the SA dev and hopefully they patch it in a future release

Thanks, will report it to SA. 

54 minutes ago, zsde said:

Just out of interest, are you guys on the Beta Program?
If not, perhaps give that a try in the meantime.
https://solar-assistant.io/help/updates/beta

Nope, not on the Beta Program. But will join the beta and see if it was resolves the issue. Thanks. 

I've been on the beta for a while but still have the issue (in fairness, I've never thought about reporting it - I just always assumed it was the battery reporting incorrect values through the serial port).

Had similar issues, best to report it and the dev will probably patch it in a future update.

I've found that forcing the connection at Pylontech with my none Pylontech batteries gives correct data.

Just an update on this issue. So I spoke to Pierre and they did update and calibrate the software to match the readings the Inverter is showing. The Beta released today has this change for this Sunsynk battery. Seems like everything is showing the correct values now. 

Edited April 19, 20233 yr by Franco321