Why does my UPS not work with modulated sine wave power?

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February 18, 2018 at 06:42:04
Specs: Windows 7, Lenovo R500 / 2 GB
I just bought a CyberPower 850 VA UPS. It works fine with household 110 VAC input but when I plug it into my Harbor Freight "modulated sine wave output " power pack, it does not accept the input power and stays on battery. Anybody out there ever have the same experience

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#1
February 18, 2018 at 07:52:24
Most likely it sees the stepped wave form as a dirty signal and tries to protect your devices with its own pure sinewave output.

message edited by THX 1138


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