Solved - MultiPlus II not feeding in anymore

DIY
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1

We have three MultiPlus II 48/5000/70-50 installed that are connected to normal 48V 100Ah lead acid batteries.
The multiplus are being configured with ESS Assistant (external control).
We control the grid set point with NodeRed to change it dynamically. Most of the time we need to feed-in to the grid.
This has been working for many months without flaws, but a few days ago due to a configuration error the batteries died (3V Voltage) and we had to replace them. Since then the Victron won’t invert into the grid, instead just stay on float and do nothing.

Things I tried so far:

  • Reconfiguring with VEConfigure
  • Update the firmware and reinstall all the settings
  • Checked for any discharge limits in dbus-spy

The batteries are at 50V and I can set a positive set point to charge them, however even this I not working anymore. In dbus-spy I can see the correct set point is applied

There are no errors or alarms, everything seems to be okay,
What else could be preventing to invert or charge?

Here I have screenshots of my settings (the low DC- Voltage limits and GridCode are on purpose)

2

Add your charger setting screenshot as that is missing.

3

Here is the screenshot

5

After a firmware update the charger settings are returned to nominal values, i.e. 12V for a 12V system, and in your case 48V for a 48V system. The firmware update process tells you to reset this afterwards, you have not, which is what I was expecting. Return your absorption and float voltages to the correct settings.

6

Yes, they are online, status lights are on float, so charging.

7

This was solving the issue of also not charging, thanks! Still not inverting though. If I set a negative set point it will stay on float instead of inverting

8

Does “ESS-Relay Test pending” could be an issue?

9

When I set the MultiPlus to “Inverter only”, it will disconnect from AC-In. Does this imply a problem with the grid?

10

Right now it’s back working. I changed the mode to charger only, inverter only and on back and forth two times, than everything was fine again. Hope it stays like this now :slight_smile:

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