My PC's power supply started making a loud whining noise after solar panels and an inverter were installed. I may also be hearing noise from the monitors. How can I narrow down the cause?
Could my new solar inverter be making my PC's power supply whine?
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6n!ticketfold_82
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Check whether your inverter has a low noise setting. Some models offer a setting that changes the switching frequency, which may move a high pitched sound out of your hearing range.
It may also affect noise from connected electronics, but that is not guaranteed. Check the inverter manual before changing settings, and keep track of the original setting so you can switch it back.
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Ask the solar installer to check the installation and help you compare the noise with the system on and off. If the whine changes consistently, that's useful information for them, even though it doesn't prove exactly what's causing it.
Don't open the power supply or inverter to investigate. Both can contain dangerous voltages.
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A UPS is another thing you could consider, but I wouldn't buy one assuming it'll fix this. Different models handle incoming power differently, so check how a particular unit operates and whether it's suitable for your PC before spending money.
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q.731+stowaway:
That setting could quiet the inverter itself too, though it might not be available on every model.