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iffster avatar image
iffster asked

What can cause battery voltage drop and voltage spike on inverter output at the same time?

Hello!

What can cause voltage drop on battery and voltage spike on Victron inverter (and after that inverter turns off/restarts)

Faulty consumer on 230V network (connected to this inverter) ??

Inverter phoenix 12/800, Gel 100AH 12v battery connected via Shunt, MPPT smart victron 100/50, CerboGX

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1 Answer
Alexandra avatar image
Alexandra answered ·

@iffster

There is a transformer in the inverter. Quite a chonk of a unit too. The magnetic field collapses when the inverter switches off basically stored energy there. And re saturates on start up (the massive dip in battery voltage caused by the saturation surge). I would say that is most likely part of what is causing the 5v shift in output as well.

The output is alot more stable with a battery with lower internal resistance and that can do the 60A that the inverter needs to be comfortable.

The sound you hear when it switches on is the transformer core saturation.

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iffster avatar image iffster commented ·

So you are saying that the Voltage on DC line (battery) is dipping when the inverter starts. But what is causing the restart of the inverter? Faulty consumer on AC/230v line?



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Alexandra avatar image Alexandra ♦ iffster commented ·
Difficult to say.

What are you other settings? Are you using dynamic cut off. Eco mode?

Does it do it with nothing plugged in?

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