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mah1234 avatar image
mah1234 asked

Multiplus 12 1600 70 short buzz on air con commpressor cut in

Brand new multiplus 12 1600 70. Running airconditioner new sparrow aircomader Mark 4 with Max watt of 950. When the airconditioner compressor cut in it draws about 70 amps inverter has a loud short low pitch buzz for about 1/8 of a second every time.


MultiPlus Quattro Inverter Charger
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klim8skeptic avatar image klim8skeptic ♦ commented ·
I seem to have missed your question?

You are running an AC from your multi, and it works?

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David avatar image
David answered ·

That sounds like an overload from the AC in-rush current when its compressor first kicks in.

The AC may be a 950W unit, but on start-up it will draw considerbly more than the 1300W the 12/1600 Multiplus is rated at. As long as the in-rush is short duration (under 30 seconds and yours is under a second) and under 3000W (for the 12/1600), it should be fine, but get used to the buzz.

I had that on a 12/500 inverter and 12/800 MP when running a 230V fridge (pulling 37W running but 800W inrush)

Also occasionally get an overload note with the 12/1600 MP when the 230V fridge starts if I have the 800W Water Boiler on (but not noticed the buzz with this one - maybe too insulated from it to hear?)

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rodewillem avatar image rodewillem commented ·
Is there by the way not a method to limit the inrush?


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kevgermany avatar image kevgermany ♦♦ rodewillem commented ·
It would help if you open a separate thread with a full problem description.
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