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#1 July 6

infiniteloop
Member

UPS power choice?

Hi
I have a desktop PC with a 650w psu and a monitor of 35w, what's the recommended power VA for a UPS?

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#2 July 6

yasamoka
Member

Re: UPS power choice?

You can't tell how much the PC draws from the PSU rating alone. Share your PC specs so those who can help you would know how much your PC draws.

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#3 July 7

xazbrat
Member

Re: UPS power choice?

Just use this basic calculator to get a starting point and go from there.

https://www.apc.com/shop/cy/en/tools/up … /home/load

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#4 July 7

infiniteloop
Member

Re: UPS power choice?

I chose 700w at 220v, it gave me a choice from 1000 to 1600va.
I have an rtx 3070,  ryzen 5600x,32gb ddr4, 2 ssd and 2 hdd in my desktop Pc. Add to that a 27" benq monitor 1080p of about 38w

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#5 July 17

infiniteloop
Member

Re: UPS power choice?

The problem is that each brand has its own calculation, with APC I could take a 1000va but with others 1500 is recommended!

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#6 July 19

infiniteloop
Member

Re: UPS power choice?

Any ways to mute the beeping sound when the electricity goes away?
I think I will get a "boardX" 1500va

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#7 July 19

nefe_lpmk
Member

Re: UPS power choice?

I went for line-interactive 2000 VA ~130$.
Line inter-active because it has some voltage regulation properties and 2000VA because you never know when you are going to need it here.

As for the beep you can remove the beeper from UPS, search for youtube video for that.
If you are worried about the noise, some 1200+ VA UPS will have fans that run when on battery, be mindful of that.

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#8 July 19

infiniteloop
Member

Re: UPS power choice?

A fan is always less audible than a beeper.
Thanks I saw that I can greatly decrease the buzzer volume with some cotton and chartiton.
I will take the 2000va, it will give me additional minutes

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#9 July 21

infiniteloop
Member

Re: UPS power choice?

Weird, every brand gives Watt equivalent in a different way, I saw some brands saying 1500va = 900w and other 720w
could it be that the 720w ones are not true 1500va?

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#10 July 22

Tech Guru
Member

Re: UPS power choice?

infiniteloop wrote:

Weird, every brand gives Watt equivalent in a different way, I saw some brands saying 1500va = 900w and other 720w
could it be that the 720w ones are not true 1500va?


They are all in-line interactive UPS with low power factor ( efficiency). A 1500VA one giving 900w has a PF of 900/1500 = 0.6 or 60% efficiency. These are the listed marketing specifications too , expect a lower PF of 0.45 - 0.5 range in actual usage. The best alternative , but much more expensive, is to purcahse  an online pure sine wave UPS. They usually have a PF of at least 0.8 and give pure not simulated output. A high initial investment, but an excellent ROI for the long run.

Last edited by Tech Guru (July 22)

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#11 July 22

infiniteloop
Member

Re: UPS power choice?

Anyone tried the BoardX 2000va?
I wonder how loud it's when battery is in use

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#12 July 24

infiniteloop
Member

Re: UPS power choice?

Anyone tried the invo? The seller claimed it's fanless so I guess it's nearly silent http://hamdanelectronics.com/home/3588- … black.html

I am also tempted by the Prolink 1500va but it has a fan

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#13 July 24

az09za90za
Member

Re: UPS power choice?

infiniteloop wrote:

Anyone tried the invo? The seller claimed it's fanless so I guess it's nearly silent http://hamdanelectronics.com/home/3588- … black.html

I am also tempted by the Prolink 1500va but it has a fan

I had good experience with invo , they're fanless and has no sound .

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#14 July 25

infiniteloop
Member

Re: UPS power choice?

az09za90za wrote:
infiniteloop wrote:

Anyone tried the invo? The seller claimed it's fanless so I guess it's nearly silent http://hamdanelectronics.com/home/3588- … black.html

I am also tempted by the Prolink 1500va but it has a fan

I had good experience with invo , they're fanless and has no sound .

Even the 1500va model?

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#15 July 26

HzSamer
Member

Re: UPS power choice?

What is your budget? and how much time are you looking to run your pc? Just a backup for several minutes or to run it for hours?

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#16 July 26

infiniteloop
Member

Re: UPS power choice?

Bought the invo 1500va, charging now
4 to 7 minutes is ok for me, it's just for transition from electricity to generator

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