Rackmount UPS models come in a variety of form factors. And bigger dimensions does not always mean better–or in this case longer runtime–so it's important to know the size and form factor your edge computing environment can support.
Most rackmount UPSs come in 2U height with a standard depth of ~20 inches. Standard server rack enclosures, such as the RS enclosure, are designed to easily accomodate UPSs of this size.
Not all wallmounted rack enclosures can house a standard depth UPS. The MiniRaq installs equipment vertically, which means equipment up to 35 inches can fit securely inside. If you will be using a horizontal wallmount rack, you may need to look at compact rackmount UPSs.
A compact rackmount UPS, such as some models of Eaton's 5P UPS, are 2U in height and 16 inches deep. The shorter depth allows for ample clearance, even when the UPS is installed in a 19 inch deep rack. (See the picture to the left showing the shorter depth of the 5P compact UPS in comparison to 5P 1U model.)
If space inside the rack enclosure is at a premium, 1U rackmount UPSs are available. These UPSs are half the height of the typical rackmount UPS, which makes them ideal for deployments in wallmount enclosures or half height rack enclosures.
For some environments a rack enclosure is not an option. If you need to deploy a single UPS close to the equipment it will support, a wallmount UPS is a great option. 1U UPSs are a good option for wallmounting because their shorter height allows them to sit closer to the wall. If depth is the limiting factor, Eaton's 5P compact UPSs can be wallmounted.