Hi
I have a desktop PC with a 650w psu and a monitor of 35w, what's the recommended power VA for a UPS?
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.
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
10 days later
The problem is that each brand has its own calculation, with APC I could take a 1000va but with others 1500 is recommended!
Any ways to mute the beeping sound when the electricity goes away?
I think I will get a "boardX" 1500va
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.
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
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?
infiniteloop wroteWeird, 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.
Anyone tried the BoardX 2000va?
I wonder how loud it's when battery is in use
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?
Bought the invo 1500va, charging now
4 to 7 minutes is ok for me, it's just for transition from electricity to generator