How to determine the battery life of the UPS?

Question

Electronics

I have a question about UPS and electricity. I will say right away that I don’t understand it from the word at all, but it would be nice to clarify this a little at the same time by solving the problem. There is a server room, in which 4 pieces of iron need to be connected to the UPS. The condition of the electrics in the building is not bad, there are no jumps, the light is turned off every 5-6 days for half an hour or an hour.
Accordingly, the task is the uninterrupted operation of these same pieces of iron, in the event of a power outage, for at least half an hour.
I tried to calculate the required battery capacity, but here I got confused in watts, volts and volt-amperes, horror!
From what I know, on hardware:
a system unit with a 600-watt power supply, a
piece of iron with a power consumption of 40 watts
, a piece of iron with an input voltage of 9v at 0.6a (how to find out watts?)
and a piece of iron with a maximum power consumption
of 3.19 watts Can you help me understand, calculate? I will be very grateful!

Answer 1

a piece of iron with an input voltage of 9v at 0.6a (how to find out watts?)

Multiply volts by amps to get watts per hour.
The power of uninterruptibles is indicated in VA, which is about 20-30% more than their real power, that is, you subtract about a third from the UPS power declared in VA and get its effective power.
Link: https://www.generatorplus.ru/auxpage_perevodim-vol...
Keeping an hour of 700 W is a bit difficult, the UPS will be quite expensive and the server segment. Arrange?
I would advise a cheaper UPS, but then it will be necessary to de-energize the pieces of iron.

Answer 2

After shutting down from the UPS, set the server to automatically turn on when power comes on (usually there is by default, but it doesn’t hurt to check).