While trying to upgrade the 12v system in my caravan to a 48v;
i used wrong color on the cables
and because I was in a hurry

I connected the battery to the busbar with reverse polarity and

Within 3 seconds, a slight sound and a strong burning smell came.


Victron SmartSolar 150 35
Victron SmartShunt 500A
and the cheap DC-DC converter burned.

The technician of the seller I bought the product from said that it could not be repaired because the PCB was covered with foam, and most likely the MOSFEDs burned;
when I entered the product serial number, the importer of the product I reached said similar things.

There is no polarity protection on the battery side on SmartSolar (it has on the PV side)


I learned that those who buy this product will not make such simple mistakes.
I ve learned a good lesson for 300 Euros + VAT.

Is it possible that I can find the burned components on the PCB when I remove the foam myself?

The picture is not up to date but the components r the same

SmartShunt still works. SmartSolar burnt