An UPS, or Uninterruptible Power Supply, is a device used to keep devices powered up in the event of a power outage. It is a standard piece of equipment in most businesses and homes. A UPS typically has a 1000VA rating, meaning that it can provide 1000 watts of continuous power. This power is usually enough to keep most devices running for a short period of time, usually around an hour.
However, depending on the device and the power outages that occur, a UPS may not be enough to keep everything running. In those cases, it is recommended to have multiple UPS units, each with a different rating, in order to ensure that everything is covered.