Is there a relationship between power and duration?

Question

Uninterruptable power source

Hello. There is a monoblock, a switch and a router. From the monoblock comes the power supply, which says: 65 watts. I need to connect all this to the UPS so that it will work for some more time when the light is turned off. My budget is up to 6k rubles.

Here, for example, if you look at this UPS: APC Easy-UPS BV1000I-GR, 1000VA
It says that the active power is 600 watts.
Question 1.
Is the power consumed by the monoblock and the power of its power supply connected? Does it mean that the monoblock consumes 65 watts?

If the answer is yes, then question 2.
It turns out that the total power of my devices will be approximately 100 watts. This is 6 times less than indicated in the characteristics of the UPS. Does this mean my AIO will last 6 times longer on a UPS battery? According to my logic: I consume less, so I work longer. Right?

Answer 1

Yes, there must be a connection, but ...
The peak power that it can deliver is written on the monoblock power supply, but the load itself depends on a bunch of conditions that are theoretically very difficult to try to calculate (without a load, a computer with weak hardware can consume a few watts, plus a monitor a couple of three dozen), it is better in practice to use any measuring device, measuring for a period of typical use.
About uninterruptible power supplies - it’s better to look at the capacity of the batteries used, otherwise marketers have become completely insolent and often write a blizzard in these figures. Unfortunately, to determine the efficiency of the ups converter (= 12v -> ~ 220v) without tests, so you can of course consider it under 80% ... And yes, by measuring the numbers now, after a couple of dozens of shutdowns or months of network operation, the numbers will change noticeably, because the battery is degrading.

Answer 2

Is the power consumed by the monoblock and the power of its power supply connected? Does it mean that the monoblock consumes 65 watts?

In the peak, that is, very rarely. If you mount a video on it, then it will be possible.

Does this mean my AIO will last 6 times longer on a UPS battery?

No, it doesn’t, because, firstly, the inverter in a cheap UPS has a low efficiency, and secondly, the discharge of the battery is a non-linear process. But in general, yes, the operating time of a 100W load will be higher than 600W, but not six times of course.

switch and router.

It is not advisable to power the switch and router from a computer-type UPS. It turns out that first the inverter converts 12V from the battery to 220V on the router's power supply, and then the router's power supply converts back to 12V, all this with low efficiency. For the router, you need a device like BIRP 12, www.birp.ru/birp-1240 , you need to select the voltage and current strength, then the autonomy of the router will not be 30 minutes, but 2-4 hours.