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j-calvin-marks avatar image
j-calvin-marks asked

MultiPlus II overload immediately when turned on

I have a MultiPlus II 12v/120v connected to 12v LiFePO4 batteries (four 100ah CHINS). It has worked flawlessly for 2 years now in our bus conversion. When I switched the inverter on this evening, it immediately set the Overload light. The only load that might have been applied was a pair of 15w LED light fixtures. I turned the inverter back off, flipped the main breaker off, and tried again, same Overload light.

Connected the bus to a separate generator, and everything works as expected (so I believe I can rule out any shorts in the electrical system, otherwise I assume it would have either tripped the generator's 20a breaker or started a fire).

Troubleshooting in the Manual for the Overload light only suggests to "reduce the load." Where should I start looking to solve this?

Multiplus-II
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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

If it goes into overload without any loads connected than the unit might be faulty. You should contact the seller from whom you bought it.

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j-calvin-marks avatar image j-calvin-marks commented ·
I purchased it over two years ago, so I doubt the seller is going to do anything.


I tried again a few days later, and it started just fine, no issues. I loaded it up with a 1,500 watt load to test, handled it fine. Worked fine for a few days. Then a few days later, it's back to the same issue, overload right away when switched on.


Should I be talking to Victron directly for a warranty claim?
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