I've found this with the shopping express deal yesterday, better than the deal before the eofy.
It is $239 on the website, then adding to the cart become $176+$20.95+$gst = $199.95
It is last day today, not sure if there are more deals like this - 1600va/960w ups less than $200.
Enjoy :)
Why? What are the advantages?
A sine wave output is the optimum waveform for electronic equipment. The incoming AC line is a sine wave, thus electronic equipment expects to see this type of waveform
The main difference between pure sine wave and simulated sine wave UPS systems is that a pure sine wave system in battery backup mode is guaranteed to produce a cleaner output for any piece of equipment connected to it, whether it’s a desktop computer, lab equipment or a server in a data center. The same cannot be said of a modified system, which produces a stepped approximation to a sine wave when on battery. Its output is choppier and provides equipment with a less stable output waveform.
Note: A stepped sine wave and a square sine wave are the same thing.
I could say, "cleaner" is less "gap" or "smoother". But most of the time we are on AC+AVR, we use ups to shutdown the device and not rely on the battery on this way.
@s12321: Probably we can say that way too but I think main point is to have something which is as close as to the incoming AC from power point.
Most PC's will be fine on simulated sine wave if you have a modern/decent quality PSU, the main critical application is if you have medical equipment running off it then you definitely need pure sign wave.
Please don't use the term 'square sine wave' its either a square wave or sine wave not both. Stepped wave is correct
@Lachie010: Thing is, how would you know it would be fine until you actually use it? From my quick reading, it seems simulated sinewave can cause issues with some active PFC PSUs. Sure, it won't damage anything, but just make it so the PSU shuts off when on battery from the UPS, defeating the purpose.
What do you look for to ensure compatibility?
@Lachie010: If it's just the presence of active PFC that suggest you go with pure sine wave, then really, that's the only safe bet with a PC. Even the cheapest PSU listed on PCCasegear lists active PFC as a feature.
@Lachie010: Not necessarily - it's not always about the PC or its PS.
It also very much depends on where you live and what your power supply (from the supplier/retailer) is like.
Mine suffers from severe brown-outs - ie. massive voltage drops.
I lost umpteen motherboards, memory dimms and power supplies on gear that had good quality power supplies - Supermicro, Superflower, Seasonic, you name it - and several of them were on "simulated" sinusoidal UPS's.
Until the gear was put on a proper sinusoidal UPS it was like Russian roulette whenever a storm approached, a spate of hot weather or just sometimes random events. Since then, I have not lost a single bit of hardware.
Not everyone's power is likely to be anywhere as bad as mine so you can pay for what you need, or what gives you peace of mind.
Bottom line: Sinusoidal UPS > Simulated sinusoidal UPS > Square wave UPS > No UPS at all
@TheMoose: Yeah I agree, but my point was on simulated sin wave the PC will usually be fine. I wasn't talking about low voltage brown outs or power spiking. Yes there are UPS's that will detect a brown out and switch over to backup power, there are UPS's that provide protection against power spiking, It does, as you said depends on application, location and quality of power. If you need pure sinewave for you application there are 'double conversion' UPS's that will ensure the voltage follows a sign wave within some specification regardless of mains power or backup.
Also what is a square wave ups, these shouldn't even exist? The RMS voltage would be too high ( @ 340v (Vpp of mains power in Australia)) for electronics made for 110-250v?
Edit, Nevermind I found what a square wave UPS is, yeah don't use these lmao, unless your device really doesn't care (its just a square wave with Vpp +- 240v)
How are a stepped sine wave and a square wave the same thing? A square wave has one transition between negative and positive, where a stepped sine wave usually has tens if not thousands. A square wave is worst case scenario, a stepped sine wave is fine.
I had a question about that, from what I can see the pure sine wave and simulated sine wave is only while on battery power. So does that mean pure and simulated still produce the same regulated voltage output when on mains?
it's good if you have the budget. :D I've spent a lot of time to find the difference in real life application for Simulated Sine Wave and Pure Sine Wave. According to cyber power both the Typical Transfer Time : 4ms for VP1600ELCD and CP1500EPFCLCD. This number is nearly half of what APC's BX1400UI (8-10ms) or BX1600MI (6-10ms) offers.
Wave form has nothing to do with transfer time. Transfer is done by ATS (automatic transfer switch/module) inside UPS. Wave form is how the electricity provided to the devices from the battery.
yes, I agree pure sine wave is smoother, but not sure how pure sine wave can do more. :)
So reading the comments, it's either go Pure Sine Wave or go home. :-)
It looks like that way but I don't think we should bury the simulated sine way UPS(s). I guess it depends how expensive the device you will run on it or how important it is.
A non pure sinewave is still better than no UPS.
Ford a computer, PC's dont at all like hard outages, especially hard drives.
This is exactly my thought, unless you run expensive pieces of equipment
Otherwise just any UPS would do. I am using one to protect against power surges and just so my PC can shutdown gracefully when power goes out which is very often where I live.
It's not the expense if you are using an AC motor then you shouldn't use anything but a sine wave ups.
Is there a discount code that needs to be added for this? Website is showing $239 and adding it to my cart doesn't reduce it to "$176+$20.95+$gst = $199.95" like Op mentions.
It does when I click on cart. It shows a discount applied.
Thanks for checking. Clearing cookies fixed it for me so the discount now shows.
What would be the recommended pure sine wave UPS for the bargainers?
Why would having a sine wave matter when it's just going to be turned into DC anyway?
DC is converted back to simulated AC at the output :)
🤦♀️ Computers run on DC.
Somebody in the previous ozbargain deal- https://www.ozbargain.com.au/node/629478
Said- "Beware that these units and all the others in this series DO NOT HAVE USER REPLACEABLE BATTERY. So once the battery is gone after a couple of years you will need to get rid of the whole unit. This is pretty poor I think. I still have a 10 year old APC unit that is going strong after I replaced its battery."
Someone listed a youtube video showing that it can be done but it doesn't show exactly how to do it. Does anyone have any experience replacing these batteries?
User replaceable batteries in UPS are mostly gone in the same way as user replaceable batteries in phones. It can be done. Just not manufacture supported. There's an inherent risk with opening up an electrical appliance but I wouldn't hesitate to pop one out to replace the battery when it's through.
What? I'm yet to buy one that isn't replaceable.
There's an inherent risk with opening up an electrical appliance.
Dude it's a SLA in a plastic compartment using the kitchen blender has more risk.
Replacements go like this:
I'm yet to buy one that isn't replaceable.
Is the battery replacement documented in the manual? If not, it's not "User replaceable".
Not user replaceable != It can't be done (easily).
@iwearpants: Dunno don't bother reading them.
It's bloody obvious how to do it, nothing is soldered down.
Here is a cheap as chips UPS that is sold today in 2021:
https://www.eaton.com/content/dam/eaton/products/backup-powe…
Replaceable.
Let's try a different brand:
https://www.apc.com/shop/au/en/products/APC-Power-Saving-Bac…
Oh it's replaceable
Lets try CyberPower:
https://www.cyberpowersystems.com/products/ups/replacement-b…
Wow that's a lot of replaceable batteries.
Let's go pick a cheap cyberpower one:
https://www.cyberpowersystems.com/product/ups/intelligent-lc…
Oh it's replaceable too.
I can't even find one that is not replaceable except for the one in this deal.
EDIT: https://www.youtube.com/watch?v=yH1zPShnAYA&t=481s lol I don't speak Thai but you don't need to it's so easy to replace the battery on this one.
@iwearpants: Then the cyber power one is user replaceable it's easy to replace just watch the video.
Can you find 4 non user replaceable UPS to counter my evidence about of 3 that are?
You claimed they are mostly gone like mobile phone batteries.
Stop giving people false info and then not admitting fault.
@deme: This whole series of UPS is non user replaceable.
Not user replaceable != It can't be done (easily).
It seems like I was wrong about this statement:
User replaceable batteries in UPS are mostly gone in the same way as user replaceable batteries in phones
I stand by the rest of what I wrote.
You still seem a little bit too worked up about this.
@iwearpants: Care to find any other UPS brand that supports your statement of:
User replaceable batteries in UPS are mostly gone in the same way as user replaceable batteries in phones.
Pure sine wave is smoother and has less spurious harmonics than square (sharp edge) waves. Simulated sine wave is good enough for home use and against power surges and short power disruptions ie good for for NBN equipment.
Something you need to consider is UPS bypasses your home RCD protection and hence you might need an RCD on its outputs :)
Spend a bit more and get the pure sine wave model your electronics will thank you :)