question

Alex Pescaru avatar image
Alex Pescaru asked

AC OUT strange readings on Multi RS Solar ...

Hello All,

I've just bought an Multi RS Solar 48/6000 dual tracker (PMR482602020).

I didn't installed it yet, but for testing purposes, I've connected the grid to AC IN. The PV1, PV2 and AC OUT were left open circuit.

Power it up and then connected to it with VictronConnect App over bluetooth.

The App says around 25W on the AC IN, which is normal, because of the device idle consumption, right?

But on the AC OUT it says - (minus) 15W.

Is this normal?

Thanks in advance for any response!

Multi RS
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Alexandra avatar image Alexandra ♦ commented ·

Do you have a battery connected?

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Alex Pescaru avatar image Alex Pescaru Alexandra ♦ commented ·

Thank you for answering.

No battery connected.

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3 Answers
nickdb avatar image
nickdb answered ·

Don't run an inverter without a battery connected.

It is not supported and things will not work as expected.

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Alex Pescaru avatar image Alex Pescaru commented ·
I understand and thanks for answering.

But at some point, the battery BMS might decide to disconnect the battery and then there will be the same situation, no battery connected....

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nickdb avatar image nickdb ♦♦ Alex Pescaru commented ·

At which point with a missing managed battery the inverter will shutdown for protection.

They are not designed nor supported without one.

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Alex Pescaru avatar image Alex Pescaru nickdb ♦♦ commented ·

Which is exactly what was doing: after a minute or so, the relays inside clicks and on the display it says: Passthrough.

But the IN 25W and OUT -15W remains...

Is it possible to be just a matter of current sensing calibration?...

Thanks again for responding.


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nickdb avatar image
nickdb answered ·

It is likely only showing readings like that since there isn't a battery and no load.

The metering is also inaccurate for tiny or non existent loads, it will be fine when properly configured.

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Alex Pescaru avatar image
Alex Pescaru answered ·

Sorry for missing that piece of info: no battery connected.

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