question

kaarthik avatar image
kaarthik asked

quattro inveter output AC voltage drops, and giving overload alarm.

Dear all,

I am using a 48/10000 VA Quattro in a 3-phase configuration. Occasionally, it gives an overload alarm even though the load is not high. I checked the VRM graphs and found that, even when the AC input is normal (234V), the inverter output alone drops to 154input-and-output-curves.jpgV, triggering the overload alarm. The settings are ESS with 90% SOC, and I have a lead-gel 1200Ah/48V battery. There are 10kW solar panels with two 250/100 controllers.Here below i have attached the voltage drop image.Thanks in advance for your help.

quattro 10kva
input-and-output-curves.jpg (31.5 KiB)
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4 Answers
Alexandra avatar image
Alexandra answered ·

@kaarthik

Ifls that one specific phase? Check your wiring. I have seen that happen with a dodge neutral and one where a circuit was feeding back.

Do you have a frequency graph?

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Fideri avatar image
Fideri answered ·

I had a similar problem, interestingly on a 10kva quattro. It was outputting 145v instead of 230v despite all the settings being correct. Strangely (and happily) upgrading the firmware solved the issue.

F.

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Kevin Windrem avatar image
Kevin Windrem answered ·

It is not possible for the AC output voltage to differ from the AC input voltage as long as the AC input is accepted. This is because a relay between the AC input and AC output is closed in this situation.

For the voltage to differ, the voltage would need to be dropped across the relay which could only occur if the relay were defective.

It would be interesting in these cases if the voltage at the actual output was measured. If the Quattro was showing a vastly different voltage than was measured with a meter, then there could be something wrong with the voltage measurement circuitry inside the Quattro.

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kaarthik avatar image
kaarthik answered ·

Dear Fideri,

my system already with 510 version

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