If the voltage degrees are unstable (ie: power stays on, but the actual voltage amount may differ a good deal through the 220V normal), then I believe that's the sort of situation where by an AVR is useful. This reply is for rescuing beginner Java programmers within the annoyance because https://josueklmkj.laowaiblog.com/32815387/examine-this-report-on-uninterruptible-power-supply-ups