I have an install where I have 4 10kw Quatros in a split phase configuration. The problem I am having is when the inverters are using the grid to charge the batteries (6 ea. 48 v 200Ah) when the inverters switch from bulk to absorb, the Inverters start a loud rhythmic humming with a “Ticking” sound.…

Loud rhythmic humming on stacked Quatro 10kw inverters

Westphal_Solar (Perry Westphal) 3 July 2025 12:41 3

Hi, I have a humming sound on a QUATTRO 48/15000.
Is it the same?

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