In case your voltage ranges are unstable (ie: power stays on, but the particular voltage degree varies a good deal from the 220V regular), then I feel that's the kind of state of affairs exactly where an AVR is useful. That UPS's output quality just isn't bottom of your barrel. https://mixedmartialartsnearme83604.blogs-service.com/64706305/uninterruptible-power-supply-fundamentals-explained