Hello,
From a discharge power of about 1000W, the inverter starts to get very loud with a frequency of 430Hz.
where can this come from ?
Regards
Guennie
asked
Multiplus 2 GX 48V/5000 430Hz Noise
Can come from ripple relay control signals from the mains, this is a problem in NZ.
But this Multiplus is here in Austria 190Hz and not in NZ.
And why exactly 430Hz ?
I have now made some progress:
The noise is probably caused by the power output in the direction of the heat pump's inverter:
If I switch off the heat pump and discharge any amount up to 3kW from the battery into the mains - no further noise is heard apart from the louder 50Hz hum of the ring core transformer.
As soon as I switch on the inverter heat pump, however, this 430Hz sound from the Multiplus starts at a discharge power of approx. 1 kW.
My guess:
Something is resonating here due to the heat pump inverter in the Multiplus.
Are there any filter options to prevent these resonance frequencies?
Regards
@Guennie69
Yes you basically need a harmonic filter there is but it needs to be sized correctly for your application. So best to find boots on the ground or a more in person approach.
