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DaLasNinja 8K Views
Aug 19, 2026 12:26 PM

CyberPower 1500VA/900W Sinewave UPS System $159.99 refurb

$160

$250

36% off
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Deal Details
A mini-tower UPS with line interactive topology, the CyberPower CST1500SUC provides battery backup (using sine wave output) and surge protection for desktop computers, workstations, networking devices, and home entertainment systems requiring active PFC power source compatibility. The CST1500SUC uses Automatic Voltage Regulation (AVR) to correct minor power fluctuations without switching to battery power, which extends battery life. AVR is essential in areas where power fluctuations occur frequently.

Front facing charge ports including one USB-A and one USB-C charge USB-enabled electronic devices such as mobile phones, tablets, and laptops even during a utility power failure.

Product Features

Battery Backup

Surge Protection

Sine Wave Output

Multifunction LCD Panel

Automatic Voltage Regulation (AVR)

USB Charge Ports

Data Line Protection

Widely Spaced Outlet(s)

Line Interactive Topology

ENERGY STAR

GreenPower UPS™ Bypass Design

Ultra Quiet Design

The batteries have been replaced by the manufacturer as part of the re-conditioning process.
Shipping Note: Shipping to Alaska or Hawaii is not available for this item

Warranty: 1 Year CyberPower Warranty

Optional Asurion Protection Plan: To further protect your purchase, you can buy an Asurion protection plan from Amazon here. Review the FAQs for additional information.

https://computers.woot.com/offers...cnt_wp_0_1
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
A mini-tower UPS with line interactive topology, the CyberPower CST1500SUC provides battery backup (using sine wave output) and surge protection for desktop computers, workstations, networking devices, and home entertainment systems requiring active PFC power source compatibility. The CST1500SUC uses Automatic Voltage Regulation (AVR) to correct minor power fluctuations without switching to battery power, which extends battery life. AVR is essential in areas where power fluctuations occur frequently.

Front facing charge ports including one USB-A and one USB-C charge USB-enabled electronic devices such as mobile phones, tablets, and laptops even during a utility power failure.

Product Features

Battery Backup

Surge Protection

Sine Wave Output

Multifunction LCD Panel

Automatic Voltage Regulation (AVR)

USB Charge Ports

Data Line Protection

Widely Spaced Outlet(s)

Line Interactive Topology

ENERGY STAR

GreenPower UPS™ Bypass Design

Ultra Quiet Design

The batteries have been replaced by the manufacturer as part of the re-conditioning process.
Shipping Note: Shipping to Alaska or Hawaii is not available for this item

Warranty: 1 Year CyberPower Warranty

Optional Asurion Protection Plan: To further protect your purchase, you can buy an Asurion protection plan from Amazon here. Review the FAQs for additional information.

https://computers.woot.com/offers...cnt_wp_0_1

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19 Comments

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Pro
Aug 19, 2026 12:28 PM
267 Comments
Joined Nov 2022
CarlosSantana2022
Pro
Aug 19, 2026 12:28 PM
267 Comments

Our community has rated this post as helpful. If you agree, why not thank

Refurbished
2
Aug 19, 2026 12:38 PM
48 Comments
Joined Dec 2021
bdm334Aug 19, 2026 12:38 PM
48 Comments
Quote from CarlosSantana2022 View quoted comment :
Refurbished
Exactly. The title is clickbait. The title should include refurbished. This price would be a heck of a deal but it's not new.
Aug 19, 2026 1:07 PM
1.4K Comments
Joined Jan 2011
cbkcc1Aug 19, 2026 1:07 PM
1.4K Comments
True sinewave so is more money

These are refurbished by Cyberpower as far as I know

Have bought rack units before from these sales
1
Aug 19, 2026 4:08 PM
496 Comments
Joined Sep 2009
EricRPAug 19, 2026 4:08 PM
496 Comments

Our community has rated this post as helpful. If you agree, why not thank

Refurb is just a new battery most of the time because they sat on the shelf too long

EDIT: Yep: "The batteries have been replaced by the manufacturer as part of the re-conditioning process."
1
Pro
Aug 19, 2026 10:22 PM
6.9K Comments
Joined Oct 2005
sleepybubba
Pro
Aug 19, 2026 10:22 PM
6.9K Comments
Didn't Costco just have those on clearance for $80?
2
Aug 20, 2026 12:16 AM
5.2K Comments
Joined Aug 2009
tomwilAug 20, 2026 12:16 AM
5.2K Comments
Quote from sleepybubba View quoted comment :
Didn't Costco just have those on clearance for $80?
Pro
Aug 21, 2026 4:55 PM
6.9K Comments
Joined Oct 2005
sleepybubba
Pro
Aug 21, 2026 4:55 PM
6.9K Comments
Yes, and other than for very few narrow use cases (super high-end audio electronics; medical equipment), what would be the real difference????
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Aug 21, 2026 5:36 PM
29 Comments
Joined Nov 2015
xnorthernxAug 21, 2026 5:36 PM
29 Comments
Is there any reason why this wouldn't be worth it? Debating using it for my HA nuc, router, and modem.
Aug 21, 2026 5:39 PM
1.6K Comments
Joined Jun 2013
abstractedpuddingAug 21, 2026 5:39 PM
1.6K Comments
Quote from xnorthernx View quoted comment :
Is there any reason why this wouldn't be worth it? Debating using it for my HA nuc, router, and modem.
The true sinewave would be overkill for that, but it would be fine.
Aug 21, 2026 5:48 PM
765 Comments
Joined Jul 2017
Nintendo1474Aug 21, 2026 5:48 PM
765 Comments
Quote from sleepybubba View quoted comment :
Yes, and other than for very few narrow use cases (super high-end audio electronics; medical equipment), what would be the real difference????
Cleaner power will reduce waste heat in the electronics being powered by this. It should also last longer for the same amount of battery capacity. You won't notice any difference until it switches to battery power, though. If you have pretty stable power and this is only because you want 100 percent uptime, it'll be fine for a few minutes a month.
Aug 21, 2026 5:58 PM
29 Comments
Joined Nov 2015
xnorthernxAug 21, 2026 5:58 PM
29 Comments
Quote from abstractedpudding View quoted comment :
The true sinewave would be overkill for that, but it would be fine.
Id rather have overkill than a 5 minute window to get it shut down safely. Guess its a buy lol
Aug 21, 2026 6:25 PM
1.7K Comments
Joined Nov 2012
nahpungnomeAug 21, 2026 6:25 PM
1.7K Comments
I've been using my CP1500PFCL for many years, just replace the battery as needed. It has worked very well with the few outages I've had. The only thing that sucks it that it's not hot swappable (my particular one anyway), not sure if this one is or not.

Overall I've been happy with cyberpower and I'd buy from them again if needed. I have my main gaming PC hooked up to it along with my monitor. I have a cheaper lower power APC for my networking hardware that's not pure sinewave, but it's hot swappable.
Aug 21, 2026 8:01 PM
1.4K Comments
Joined Sep 2022
TealIdea227Aug 21, 2026 8:01 PM
1.4K Comments
During our most recent (and rare) power outage I learned definitively that my ISP now has some active devices in our path with no battery backup. It's a bit ironic, because 15-20 years ago it was very trendy to push VOIP with promises that it would still work with the power out just like a real phone - even the telco did this to sell people on FTTC. Yeah, I know, everybody is glued to their glowing rectangle 24/7 nowadays.

Anyhow, if you need this, you need this, but I am now firmly in the camp of a single 7Ah SLA providing the seconds of runtime I need to smooth out the afternoon flickers for any one connected device, with a longer lifespan than 9Ah of equivalent weight. Until the whole-house battery of some nebulous future.
1
Aug 22, 2026 1:34 PM
574 Comments
Joined Dec 2016
TexusSoonerAug 22, 2026 1:34 PM
574 Comments
I have two of these, I bought them YEARS ago for $120ish. I could use a third, I'm not scared of the refurb/new battery to get an actual UPS.

These are pure UPS- anything connected to the (battery portion) constantly runs off battery, so any power outage doesn't have to make a power switch. Some equipment doesn't like that brief switchover the cheaper UPS do that just cutover to battery when outage occurs.

With that said, the main downside to these is CyberPower locked some of their software features to do with like estimated battery heath behind subscription. I don't subscribe to this, but it's just worth knowing.

These are very standard lawn mower batteries that can be replaced for $20-25/ea... I usually get a few years out of them before they need to be replaced. I run the self tests about once a quarter, and when those fail is when I know it needs to be replaced.
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Aug 22, 2026 5:05 PM
2.4K Comments
Joined Oct 2011
MWinkAug 22, 2026 5:05 PM
2.4K Comments
Quote from TexusSooner View quoted comment :
These are pure UPS- anything connected to the (battery portion) constantly runs off battery, so any power outage doesn't have to make a power switch. Some equipment doesn't like that brief switchover the cheaper UPS do that just cutover to battery when outage occurs.
This is not correct. That is how a "true online" double-conversion UPS operates. Those are basically non-existent in the consumer space. This model is a line-interactive design. Incoming AC power is normally passed to the load unmodified. If the voltage gets slightly too low/high, the AVR feature can boost/trim it by a certain percentage. If it gets too far off, it switches to battery. There is a switchover time, however that shouldn't be a problem for almost any PC.
1

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