I've been using the victron multiplus 3000 in conjunction with two BYD B-Plus L 2.5 in a trailer to take power from grid (16A 230V). But two days ago, the multiplus has stopped charging the batteries and the batteries are completely out of battery at the moment.
On the front of the MP I can see the "low battery" light is flashing but on the control panel it shows the battery is at 100%, as shown in the picture. And I also suspect it is not taking any power from grid...
I've tested the grid power is the supply is fine. I've also tried switching the MP off and on again but nothing changed. Are there any reasons causing this? Could you suggest ways to fix this please?