question

@Linus Marinverket.

Yes. But is the inverter getting hot? Do the fans run?

If it is flashing during charging that would definitely make sense.

The inverter is working fine and doesnt get hot.

The fans are running and i even checked the 2 white connectors with 2 brown cables in each connector.

Very strange???

Hi,

I have just taken apart a Multiplus and there were a couple of what looked like Thermistors (Temperature Sensors) attached to the big aluminium assemble that the Mosfets/Power Transistors are all screwed to.

It would make sense that they get hot while charging as they are being used.

I have just been commissioning a new set of batteries and cycling them a few times and I have been getting High Temperature warnings even though the unit did not seem hot and it was only discharging at 500 watts.

I took the fan out and hooked it up to a bench power supply to check for flow and found that if you removed the cover plate that was below the fan on the outside then the flow rate was greatly improved.

I have modified the plate to help keep the unit cool and have not had a problem since.

It took 10 minutes with a step drill.

I am not familiar with your unit but if it has a plate like in the picture below then you could try removing it to see if it solves the problem before drilling.

Hope this helps.