My UPS has the following specs:
INVO brand
Model : 1500VA
Input :220Va,c50/60hz
output:220Va,c50/60hz
Capacity:1500VA,900WMy AVR has the following specs:
KEBO brand
HDR-2000VA
Input :14-260
Output 220-50/60 hz2 Answers
It doesn't make any difference for the equipment powered by them:
Any decent UPS is also a voltage regulator, because it creates a regulated output, regardless of what the input is doing (of course, presuming the UPS battery has been charged).
Unless your mains voltage fluctuates wildly (drops too much below/above the input specs of the UPS regularly), in which case you put the regulator before the UPS and plug the regulator into the mains first. This takes a lot of strain of the UPS and prevents it from being worn out prematurely.
PLEASE NOTE: If your mains power is so bad that you need a separate regulator have an electrician look at it immediately. For house-wiring this isn't acceptable. (In industrial buildings heavy duty equipment may cause such issues, but it still isn't nice and usually a sign the power-grid is under too much strain.)
2The ups should be plugged into the voltage regulator.
Why?
Most of the change in line voltage will come from the external source, normally the power company. This will also protect your UPS by providing the correct line voltage.
