Calculate how long your uninterruptible power supply (UPS) will provide backup power based on its VA rating and your equipment's power consumption. Enter your UPS specifications and load details below to estimate runtime during a power outage. This run time acts as a buffer, giving users the chance to shut down sensitive equipment safely or switch to an alternative power source, such as a. . An uninterruptible power supply (UPS) or uninterruptible power source is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. Specifically, the larger the battery capacity, the longer the backup power time that the. .
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