No, not all Pure Sine Wave UPS are identical.
No, not all Pure Sine Wave UPS are identical.
Hello there, do all sine-wave UPS models look identical? I assumed they were the same until I noticed "5%-/+ distortion, power factor 0.60~" on their labels and began questioning whether this might impact connected devices. Should I really rely on a UPS with replaceable batteries? I own a 1000W Rmx Corsair PSU and believe my usage won’t surpass 900W during peak times (like with the 59W monitor). So would a 900W UPS be enough? I’m worried that finding a dependable UPS is becoming increasingly necessary, especially since many tasks are now done remotely.
Overall: No.
There are two main types of sine wave:
1. simulated sine wave (also known as stepped-approximated sine wave)
2. true/pure sine wave
The difference is significant depending on which type you're using.
It really depends on whether you're working with a simulated sine wave or a true/pure sine wave UPS.
Please link the UPS specifications so I can review them.
In summary, a 900W (~1500VA) UPS should be adequate for your project.
Yeah but still, even the if UPS say that it's pure sine-wave, I should just take their word for it ?
Here's from Gembird I think - >
https://gembird.com/item.aspx?id=8737
Here's from PowerWalker I think - >
https://powerwalker.com/product/10121119/
,
https://powerwalker.com/product/10121136/
Also one more from Cyber Power, it's weird though, but still ->
OLS1000EA-DE | CyberPower
CyberPower OLS1000EA-DE is a high-performance UPS featuring online double-conversion topology, which provides seamless Pure Sine Wave power for mission-critical devices such as NAS and servers, DVRs/surveillance systems, transportation and infrastructure, and emergency systems. It’s typically...
www.cyberpower.com
I've checked APC and Cyber Power, and currently the APC with 900W and sine-wave ~ costs around 500~, so it's way over the line.
The Gembird unit is significantly larger than what's suitable for your configuration. It's a 3000VA/2400W model, and it probably comes with a high price tag as well. If it doesn't fit, I'd steer clear.
I don't suspect this Gembird UPS is a genuine pure sine wave unit. However, according to its specifications, it can produce true sine waves, but its build quality seems poor—especially noticeable in the 10ms transfer time required.
Real line-interactive UPS systems generally switch over quickly from main power to battery in about 10ms, which aligns more with standby topology than line-interactive.
The PowerWalker model offers a slightly faster transfer time (around 6ms) but still caps at 10ms. Even though it supports true sine wave and line-interactive features, I wouldn't recommend it either.
For comparison, here are the specs of my current UPS: CyberPower PFC Sinewave CP1300EPFCLCD (1300VA/780W, true sine wave, line-interactive). Details can be found [here](https://www.cyberpower.com/hk/en/product...cification).
As you can see, high-quality UPS units typically have a transfer time of just 4ms, which is typical for line-interactive systems.
Gembird and PowerWalker models also exhibit excessive tolerance in frequency regulation when using battery power (±10%), whereas my units maintain ±1% accuracy.
If you're seeking dependable options, consider APC, CyberPower, or TrippLite. There are other choices too, such as Gembird and PowerWalker, but they come with similar limitations.
Based on the information about Gembird and PowerWalker, it appears they're built with inferior materials, making them less trustworthy for long-term reliability.
It's clear you've underestimated the expense of a proper UPS. Since their main role is to keep your PC running during power outages by delivering stable electricity, they come at a significant cost.
For instance, I recently spent €230 on a CyberPower CP1300EPFCLCD (1300VA/780W) UPS six years ago. Given the high cost of my PC, replacement isn't easy. Whether you prefer it or not, if you need reliable protection, it won't be cheap. However, if you're after affordable options, consider purchasing two units: one budget model and one higher-quality one.
In short: if you want durability, invest in better models like APC, CyberPower, or TrippLite. There are other brands as well, such as Gembird and PowerWalker, but they come with similar drawbacks.
Aha, you're absolutely right. It was too impressive to be genuine to obtain the powerwalker or the gembird, even though both claim they produce a "pure sine-wave" output. Thank you for clarifying! Have you looked at this one as well?
https://www.cyberpower.com/de/en/product...s1000ea-de
It seemed quite reasonable at the price, though I'm unsure about its suitability for PC use.
Oh wow, that is online, double-conversion UPS. It is actually better than the line-interactive topology UPS that i'm using. But since it also costs more, i didn't have money to buy online, double-conversion UPS (+ the maintenance cost of owning one).
While online, delta-conversion UPS is the best topology there is (at least at current date).
Also, in my opinion, every PC should have an UPS.
More in-depth about UPSes;
UPSes can output 3 different kinds of waveform:
1. square wave - cheapest of the three. ONLY good for robust hardware, like power generators and motors.
2. simulated sine wave (aka stepped-approximated sine wave) - mediocre price. Good for most home appliances (e.g fridge, washing machine, lights).
3. true/pure sine wave - high price. It is the same as you get out of the wall socket. ONLY waveform good for sensitive electronics, like medical equipment, TVs, PC PSUs.
So, you want to have true/pure sine wave UPS. Simulated sine wave UPS may also work, but it may not. More of that below;
When looking for an UPS, there are 2 things to look out:
1. Output waveform (square wave, simulated sine wave and true/pure sine wave)
2. Design (stand-by, line-interactive and online)
From here you can read about the differences between output waveform,
link:
https://suvastika.com/why-choose-a-sinew...erter-ups/
And here are explanations about the UPS design,
link:
https://www.eetimes.com/document.asp?doc_id=1272971
Waveform and design
For PCs, line-interactive UPS would be more than enough since PSUs can easily handle the 2ms to 5ms transfer time of line-interactive UPS.
As far as output waveform goes, true/pure sine wave UPS is best used. While simulated sine wave UPSes are cheaper than true/pure sine wave UPSes, PSUs with Active PFC aren't compatible with simulated sine wave. You might get simulated sine wave UPS running with Active PFC PSU but there can be some major issues. Here's what, how and why.
How do you know which PSUs have Active PFC and which ones don't?
Simple, every PSU that has 80+ certification (e.g 80+ Bronze or 80+ Gold) has Active PFC.
What is Active PFC?
Further reading:
https://en.wikipedia.org/wiki/Power_fact...near_loads
What can happen when using simulated sine wave UPS with Active PFC PSU?
When simulated sine wave UPS switches over to the battery power, one of 3 things can happen:
1. UPS displays error resulting PC to shut down immediately.
2. UPS shuts down resulting PC to shut down immediately.
3. UPS switches to battery power resulting PC to power off from UPS (PC stays on).
Why it happens?
Simulated sine wave UPS produces a zero output state during the phase change cycle resulting in a power “gap”. This gap may cause power interruption for active PFC PSUs when switching from AC power output to simulated sine wave output (battery mode).
What to do next?
As stated above, your PC can run off from simulated sine wave UPS but be prepared when you face issues with it. When issues do rise, your best bet would be returning the simulated sine wave UPS and getting true/pure sine wave UPS. Or you can go with true/pure sine wave UPS off the bat.
Wattage
As far as UPS wattage goes, you need to consider the power draw of your PC and monitors. Maybe speakers and wi-fi router too if you plan to plug those into the UPS as well. Though, printers, scanners and other such hardware (full list on your UPS manual) don't plug to the UPS since their startup power draw is way too much for UPS to handle and you can fry your UPS.
Taking PSU's max wattage as a baseline is good idea since it will give your UPS more headroom and you can get longer runtime out of your UPS. Since your PSU is 1000W, at least one monitor is added on top of it. As you said, your monitor uses 59W. Wi-fi routers don't consume much power. For example, my Cisco EPC3940L consumes 12V at 3A which means 36W.
Now, you don't have to get 1000W or 1100W UPS. Your build does fine with 800W or 900W UPS as well.
But the more powerful UPS you have, the longer UPS can keep your PC running before it's battery is empty.
A bit more about online (double- or delta-conversion) UPSes;
Online UPSes work on the principle that power is always taken directly from the battery (0 transfer time) and inverter is charging the battery at the same time. Now, if there is failure within the battery, it switches to the main power, directly from the wall. Online topology works vice-versa to the line-interactive topology.
Pros of online topology:
* 0 transfer time
* true/pure sine wave
* no downtime at all
Cons of online topology:
* battery will wear out fast
* only authorized service can replace batteries
Online topology is commonly used in server parks, where UPSes have multiple replaceable batteries. So, when one of the batteries dies, it is replaced without cutting the power to the servers at all. However, online UPSes doesn't have user replaceable batteries, only authorized service can replace their batteries, doing it on-site.
So, when you're home user, better to look towards line-interactive topology (e.g CyberPower New PFC Sinewave series i linked above), where you can power down your system and replace the battery when needed. It's also cheaper than online topology UPS.
But when you have a business, where PC downtime is not acceptable, online topology would suit better. But this means that to replace the battery, you have to order proper technician on-site, who then does the battery replacement (while the PC remains powered at all times).
It's really my best shot at finding a dependable UPS since the CF1500 (900W) isn't available. The online upgrades seem likely to work, as I won’t need external devices like speakers or printers—just the PC, peripherals, and monitor. Also, with around 10 to 140mm fans inside the case, it probably doesn’t matter much.
Hence why i said;
Since your entire PC (internals) are powered by PSU, there's no need to add up individual components and their power draw.
Though, there wattmeters out there that measure PC's power draw. These are good, since they also measure the PSU's loss of efficiency as well. So, you can learn the actual wattage PC consumes from the UPS.
E.g before i bought my UPSes, i bought McLean Energy MCE06 230V/16A wattmeter;
specs:
http://maclean.pl/index.php?option=...cz...Itemid=110
(Note: official specs are in Polish, but you can use Google Translate to translate it into English.)
I plugged my wattmeter to the main power socket and plugged the PC into it. Then i ran synthetic benchmarks to utilize my CPU and GPU at 100%, while looking what wattmeter shows as entire power consumption of the PC.
Spoiler:
Pic of my wattmeter results (click here to view)
Since i ever got ~204W peak, i knew how much my PC consumes at 100% load (which also includes PSU's efficiency loss). Then, i added the power consumption of monitor and 2.1 speakers to it as well, to know the bare minimum UPS capacity that i need.
Since my PSU is 650W unit, i took this as a baseline, for longer runtime. So, ended up going with 1300VA/ 780W UPS.
With that beefy of an UPS and relatively low power consumption of my PC (big thanks to Seasonic SSR-650TD 80+ Titanium efficiency PSU), my UPS runtime is ~30mins during blackout.
Though, i ever need ~5 mins to save my work and shut down my PC during blackout.
If you do not have CyberPower PFC Sinewave series available at your area, then CyberPower online, double-conversion UPS is also a good choice. Now, i can't tell how noisy it is, since it will be constantly working and in server parks, noise isn't an issue at all (since all servers are very noisy and they are kept in sound isolated rooms, away from humans).
You're absolutely right about being a great tech expert! It seems the same applies to sinewave generators as well, or there might be some differences. I was told that more affordable models usually don't deliver clean electricity like standard UPS units, just modified sine waves, which could affect devices. The same goes for solar panels on the roof—whether they work depends on the quality of the equipment.
Electrical generators typically deliver square wave output, though some can mimic a sine wave. This is practical because, without access to a main power grid, it's more useful to have lights or appliances running than to rely on a computer that lacks internet connectivity. However, there exist genuine sine wave generators as well, but they are expensive—similar to UPS systems; square wave is the most affordable, followed by simulated sine wave, and then true/pure sine wave UPS is the priciest.
For more details, refer to the following link:
https://support.generac.com/s/artic...a-...-Sine-Wave
To confirm the output, it's essential to check the generator’s specifications.
With generators, you often encounter high levels of electromagnetic interference (EMI), so EMI filtering is necessary.
Solar panels, on the other hand, are not used directly because their power fluctuates with sunlight and weather, and they produce direct current (DC). Household appliances and PC power supplies operate on alternating current (AC). Instead, solar panels are primarily used to charge batteries, which then supply power to devices. In essence, solar panels function much like an online topology UPS.
Most solar inverters can generate true or pure sine wave, but it's crucial to verify whether the inverter provides actual sine wave or simulated sine wave output.
In summary:
Solar panel → DC → batteries → DC → inverter + AVR → AC → household appliances (including PC PSU, which converts AC back to DC for computer use).
Electrical generator → AC → EMI filter + AVR → AC → household appliances.
The simplest option for running a PC without depending on the main power or backup systems is to purchase a laptop.
If you decide to proceed with generators or solar panels, it's advisable to consult a certified electrician first. This ensures you choose the most suitable solution that fits your requirements and budget.
Also, keep in mind that both AC and DC generators exist (notably, solar panels are actually DC generators). AC generators—powered by gasoline or diesel—can be divided into two categories:
* those that continuously supply power to the system (backup generators used during emergencies).
* those designed for appliances to be connected directly (common in farming applications for providing electricity to fields during repairs).