Strange behavior Full Solar Passthrough

[Kukusse]

Hello,

Today was finally sunny, and I could observe for the first time the Full Solar Pass Throw mode.

My setup:
OpenDTU on Battery, version of 2024.11.20, on a fusion board.

• 2 Victron MPPT, connected with the ESP32.
• one battery Pylontech US3000
• one WR HM-600 - so I can inject 600W max.
• power meter is a Hichi IR-Lesekopt. Data are send per MQTT.

Between 16:28 and 16:55, the battery had a SoC of 95%. Before, it was 94%, after, 94%. So I just reached the peak of the day.

I set 95% as the Full Solar-Passthrough Start Threshold.

During the time periode of 16:28 et 16:55, I had the following plots:

So the non persistent limit of the inverter jumped continually from its minimum of 20 W to 600W , even, if less than 600 W is produced by the solar panels. I would have expected a curve very close to solar production (but limited to 600W).

I saw this effect already last week, but was not able to save the data.

Is this a normal behaviour ? it looks like to regulation loops are fighting against each-other.

Thanks for the help,

Regards

Cédric

[AndreasBoehm]

Please install the latest version and test it again.
We can not provide support for older versions.

https://github.com/hoylabs/OpenDTU-OnBattery/releases/tag/2025.02.10

[Kukusse]

I just updated the firmware. I will report here if the full solar passthrough works fine, as soon as the sun comes back.

[Kukusse]

Hello,

Yesterday was a sunny day in Hamburg. I confirm that yesterday, with the version 2025.02.10, the full solar passthrough mode worked as planned.