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Good to know. Thanks for manufacturer and model info. 
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I've probably got about 60 years runtime with various UPSes over the last 25 years. Never had a failure more serious than a battery declining to the point it couldn't keep the supported system online long enough to safe shutdown (generally 3-5 years before a new battery is needed). Mostly APC models - initially 300-600VA 'shoebox' models, subsequently entry level ($150 class vs $400 for the next level up) 1200-1500 VA 'mini-towers'); although my most recent model is a Cyberpower. I switched at the time for 2 reasons (not sure if either is still valid) - APCs newest entry level tower was getting a lot of complaints over an obnoxiously noisy fan when it was running, and modern Active PFC power supplies are pickier about the quality of AC waveform they get (lower runtime or in previously barely able to a power a system cases outright shutdown with simpler designs) but APC was only offering a stepped square wave at the $150 level and wanted $400 for a modified sine wave (AFAIK this just adds an extra component to slope the voltage transitions up/down) vs most of their competition offering it at the $150 point.
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, weighing all things in the balance of reason?
Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful?
--Zachris Topelius
Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies.
-- Sarah Hoyt
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Great info. I was wondering why a lot of people seem to be switching from APC to CyberPower.
I remember a company I worked for during Win3.1 days having APCs and they worked well, but that was a long time ago.
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They are brilliant!
But ... avoid the Chinese ones: it took three attempts to get one to me in a working condition (batteries are HEAVY and couriers treat "FRAGILE" as a challenge ...)
It lasted a year, and then the electronics went: it would switch over but it immediately turned itself off ... the batteries were fine, but it was useless.
Do I have one now? No - but I will again when I get around to it.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: They are brilliant!
That's how I feel about them -- even though I've never had one, only seen them in action at various workplaces.
OriginalGriff wrote: But ... avoid the Chinese ones:
I know there are a lot of knock-off products when ordering thru Amazon and I think people at various times end up with the knock-off instead of the real devices and I'm wondering if that is what is happening to some buyers which experience the sparks & fires. I would think the real things would have to be able to 100% prevent that.
Thanks for info.
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OriginalGriff wrote: avoid the Chinese ones
Surprise !
Recharge Your Memory[^]
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Oh, before I forget - check the power supply on your computer: some of them do not like "chopped" square wave, and may insist on a "proper" sine wave input. Some UPS's will give that, some won't.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: check the power supply on your computer:
Thanks for info. That's why I was looking at the CyberPower ones.
In my case I'm really wanting to power up the wifi router and cable modem so I'm guessing that since they have external power supplies even the square wave ones would probably work?? Not sure though.
Thanks
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Hi Paul if you ever get around to buying another UPS give me a shout and tell me what you've decided on - I use a SBC as a jenkins and local nuget server for my home and shared projects and it's on 24/7 , I know it's not on the same scale as powering a server but the dear litle box is very useful and a PITA to rebuild ( despite my having an image of the base build )
"We can't stop here - this is bat country" - Hunter S Thompson - RIP
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The only problem I've ever had with a UPS other than old batteries was when UPS bashed a brand new APC unit so badly they bent the sheet metal casing.
That said, yes, there have been a small number of reports of fires out of millions made.
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Thanks for the info. From the reviews it made it seem like they happened quite often. But I understand reviewers often have bad setups, incorrect wiring in their homes, etc. Just wanted to get a feel for what other people experienced.
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Hosting them in the chimney, should be a safe place 
It does not solve my Problem, but it answers my question
Chemists have exactly one rule: there are only exceptions
modified 19-Jan-21 21:04pm.
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raddevus wrote:
What is your experience with this? Are these things safe?
I've never experienced any such thing in all the years I've had a UPS. All electronics have the potential to be dangerous. That's just the nature of the game.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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David Crow wrote: I've never experienced any such thing in all the years I've had a UPS.
Very good to know.
David Crow wrote: All electronics have the potential to be dangerous.
I agree. It was just that there were quite a few reviewers mentioning sparks and fires so I wanted to get another random sampling of intelligent users...and even though I wanted intelligent users, I came here to CP.  Of course, I am kidding. CP Lounge is really full of a lot of great people with vast years of experience.
Thanks for the info.
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I got a good-sized APC unit quite a while ago at a very good price. Eventually the batteries wore out and I replaced those last year and it's still going strong. I think it is a 1500VA unit.
I find it difficult to believe stories of sparks being emitted because how could a unit possibly acquire UL or CE rating with that kind of behavior?
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
modified 28-Jul-20 14:41pm.
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Thanks very much for the info.
Rick York wrote: I find it difficult to believe stories of sparks being emitted because how could a unit possibly acquire UL or CE rating with that kind of behavior?
That's exactly what I thought! If this happened even in 1 out 10,000 it wouldn't be a valid product really.
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I bought a cheap "UPS" from Staples, which was a mistake. No sparks, but it's not a true "UPS" - it takes a few tenths of a second to switch over to battery, by which time the devices on it have powered off.
So, make sure you get a UPS that actually generates the AC from the battery and doesn't do a "switch over" from the mains to the battery.
Can't tell if that CyberPower model does that or not.
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Marc Clifton wrote: but it's not a true "UPS" - it takes a few tenths of a second to switch over to battery, by which time the devices on it have powered off.
Thanks for the info. I was trying to determine the same thing. Is this the option where it is sine wave versus square wave? I just can't tell. The flickers are the exact thing I'm trying to get rid of.
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I've owned or managed at least 30 or 40 of those things (2 at home others at companies where I worked for years) and never ever they emitted anything that was not expected.
Of course they die without further notice, their batteries die...
But in my experience they are safe.
It's a relatively simple device... I fail to see how brands like APC, EATON and others could do this kind of mistake... which would make them illegal in most cases...
modified 28-Jul-20 16:57pm.
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Joan M wrote: I've owned or managed at least 30 or 40 of those things (2 at home others at companies where I worked for years) and never ever they emitted anything that was not expected.
Thanks for the great info. This is what I was looking for...various people chiming in who've had a lot of experience with them. I too wondered how it would be a valid product if that sort of thing happened even 1 in 10,000. Thanks again.
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One additional piece of advice : test your UPS periodically. I work for a rather large manufacturing company and we have UPS' on probably every system in the factories but no one ever tests them so I am willing to bet a majority are useless. The last service call I had to deal with was because of corrupted files that resulted from a power loss where the UPS immediately died because its batteries were shot.
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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Great advice. I was thinking the same thing. I hope I'm not too lazy though -- because it will mean walking all the way down to the basement and flipping the circuit breaker.
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I just unplug them from the wall to test them but what ever. 
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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Haha! Yes, you are correct. I dont' have one so I was thinking I had to make sure it had no power by other means. Hahaha. Yeah, just unplug the UPS. I will remember that.
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