Runtime is the number of minutes a UPS solution can supply battery backup power to connected devices in case of a power outage. Adding devices to the UPS solution increases its power usage. The greater the power used, the less time a UPS system can power everything. When selecting a UPS unit, it is generally recommended to select one with an output watt capacity that is 20 to 25 per cent greater than the total wattage of the connected devices. After calculating the required runtime, you will need to consider future expansion and the desired features. In addition to years of testing and proven dependability, the brands that we carry have incredible options.