Second B2500D stops automatic feed-in until manual reactivation in PowerZero app

[xbmAsTeR]

Hello,

I am running 2 Marstek B2500D units. Originally, both should have worked with a Shelly Pro 3EM, but unfortunately the batteries do not detect the Shelly correctly.

As a workaround, I installed b2500meter in Home Assistant. In the beginning, everything seemed to work fine. But after around 2 days, only one storage unit continued feeding power, while the second one stopped completely.

To fix it, I opened the PowerZero app, briefly switched the inverter to manual mode, and the unit started feeding power again immediately. After that, I switched it back to automatic mode.

The same issue happened again today:

Battery 1 was feeding in normally

Battery 2 was inactive

Only after manually setting the feed-in again in the app did Battery 2 resume operation

My question is:

Is this likely caused by my current configuration?

Or are other users seeing the same behavior with multiple B2500D units?

Environment:

2x Marstek B2500D

Shelly Pro 3EM

Home Assistant

b2500meter integration

I can provide additional details, logs, or configuration if required.