Yes, you can use an UPS to run the classcloud. If you think there is lot of power cut or fluctuations in your region we strongly recommend that you run the Classcloud on a UPS. You have to ensure that the (desired) output is 12 volts.
Recommended UPS for Classcloud:
3.APC Back UPS
If you want to know more info you can connect with our customer support team at firstname.lastname@example.org