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landyacht318's avatar
landyacht318
Explorer
Sep 07, 2014

eTopxizu (cheapowatt) 30 amp power supply Guinea Pig

For under 23$ and free 2 day shipping, I decided to click 'place order' on this 30 amp MW Clone I have 2 batteries, a flooded and an AGM battery which I never discharge together, but which req...
ken_white's avatar
ken_white
Explorer
Sep 13, 2014
The whining is probably because the output voltage is higher than the regulator is adjusted to control, so its trying to reduce the battery voltage when it can't...

Probably stressing the magnetics and transistors...

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