When your voltage ranges are unstable (ie: power stays on, but the particular voltage amount may differ a whole lot with the 220V typical), then I believe that's the kind of circumstance in which an AVR is useful. While I wouldn't fret too much about what weak power quality would https://emilianod4hdy.blogchaat.com/33859063/helping-the-others-realize-the-advantages-of-uninterruptible-power-supply-cyberpower