Victron Multiplus Compact 12 v/800W/35A ( South Africa)

DIY
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Morning all, please assist. I have an older model Multiplus unit as above which does not switch over to charger anymore while on 220 volt ( South Africa). It is used in my Campervan. It seems to try but defaults to “Alarm”. I have been quoted some tidy sum of money to 1st do a reprogram, and if still not working to give me an assessment to repair, .. also a tidy sum.

I am wondering if I can download some software from the net and do my own reprogramming under supervision?..

Beside that however, I would be very keen to understand what could be the problem. I have removed the covers from the unit and taken photographs of the inside only to find everything looks fine / no burn etc…

Thanks in anticipation folks

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@Rond58
Do you have a gx device on the inverter? If you do it can be done over the vrm

If not you will need an mk3 to usb adaptor.

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Hi and thanks for that . sadly no gx device. Please explain or show a pic of a mk3 to usb adaptor?.

Thanks again for your response

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There is also a newer version with usb-3 plug.

1 Like
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If you have a picture of the onboard chip and the serial number (just the first 4 or 5 letter/numbers) we can help further to let you know if it can be updated