The 10 Best Uninterrupted Power Supplies

Updated May 17, 2017

10 Best Uninterrupted Power Supplies
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We spent 45 hours on research, videography, and editing, to review the top options for this wiki. We often don't realize how dependent our lives are on electricity until our power goes out. When it does, you may risk losing valuable data on your computers. Thankfully, uninterrupted supplies can provide a battery backup to keep your devices running long enough to safely shut them down. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best uninterrupted power supply on Amazon.

10. APC BE550G

The APC BE550G is one of the most popular solutions for home and small business use. 4 of the 8 outlets can run off its 330-watt backup battery, so you can safely save that document and turn off your desktop computer during a blackout.
  • all 8 outlets are surge protected
  • best cost to feature ratio
  • short battery life
Brand APC
Model BE550G
Weight 13.3 pounds
Rating 4.2 / 5.0

9. Cyberpower CP825AVRLCD

During an outage, it's helpful to have the LCD display on the Cyberpower CP825AVRLCD so you can know the run time in minutes and see information about the battery. During normal usage, the unit corrects brownouts and voltage spikes to ensure your devices run smoothly.
  • simulated sine wave output
  • 3-year warranty included
  • battery cannot be replaced
Brand CyberPower
Weight 14.5 pounds
Rating 3.9 / 5.0

8. Liebert PSA4

Used in Fortune 500 companies all across the country, the Liebert PSA4 guarantees protection for your gaming station or workstation at home too. Even if you're out of the house when it loses voltage, the software can automatically shut off your systems by itself.
  • no questions asked 3-year warranty
  • data line surge protection
  • slightly overpriced option
Brand Liebert
Model PSA4-1500MT120
Weight 28.7 pounds
Rating 3.6 / 5.0

7. Tripp Lite 1500LCDT

With the long-lasting battery support of the Tripp Lite 1500LCDT you might finish an entire movie on your computer before you notice that the bathroom lights won't turn on. This selection also has user-replaceable batteries so it can remain in service for years and years.
  • multifunction lcd screen
  • automatic voltage regulation
  • unpleasant odor reported by some
Brand Tripp Lite
Weight 27.4 pounds
Rating 4.3 / 5.0

6. APC BE850M2

The APC BE850M2 is like the big brother of the BE550G. It's got enough juice to power your home network for close to 6 hours during an outage, so you'll be able to surf the web all night. There's even 2 USB charging ports to keep your phone alive in case someone calls.
  • 9 total outlets
  • 6 battery backup outlets
  • low power mode for extended outages
Brand APC
Model BE850M2
Weight 9.8 pounds
Rating 4.5 / 5.0

5. APC BG500

With its advanced lithium-ion battery, the APC BG500 is much lighter than its lead battery counterparts, which means you can even mount this device on your wall. It also allows you to monitor its status via a web browser and control energy usage.
  • four power protection outlets
  • good option for networking equipment
  • outlets are energy managed
Brand APC
Model BG500
Weight 6.7 pounds
Rating 4.0 / 5.0

4. Tripp Lite 1000RM1U

The Tripp Lite 1000RM1U has a rackmount design, making this option perfect for supporting any IT or audio equipment you may have. Or you can take advantage of its slim profile to slide it into small areas where a normal UPS won't fit.
  • pure sine wave output
  • 250k insurance for connected devices
  • provides up to 14 min of power
Brand Tripp Lite
Model SMART1000RM1U
Weight 34.9 pounds
Rating 4.7 / 5.0

3. CyberPower PR1500LCD

The CyberPower PR1500LCD is designed to support all types of equipment. Its control panel has up to 41 different settings for managing usage, and the pure sine wave output is necessary for running valuable server equipment.
  • regulates frequency as well
  • remote management option
  • lcd panel is detachable
Brand CyberPower
Model PR1500LCD
Weight 60.2 pounds
Rating 4.9 / 5.0

2. Cyberpower CP1500PFCLCD

The Cyberpower CP1500PFCLCD emits an audible alarm when it begins to draw on its battery power, so you can wake up from your slumber and safely turn off your appliances. It also protects against surges from your phone and TV lines.
  • pure sine wave at an affordable cost
  • 5 battery backup outlets
  • can be monitored from computer
Brand CyberPower
Model CP1500PFCLCD
Weight 25.1 pounds
Rating 4.6 / 5.0

1. APC SMT1500

The APC SMT1500 is quite literally a powerhouse as it provides energy and surge protection to all 8 of its outlets. To make your life easier, it even predicts the month and year that the battery will need to be replaced based on your usage.
  • automatic voltage regulation
  • green mode reduces power consumption
  • bright lcd interface
Brand APC
Model SMT1500
Weight 57.8 pounds
Rating 4.7 / 5.0

What Is An Uninterrupted Power Source

An uninterruptible power supply (UPS) provides backup power when there is a blackout or your main power source goes out for some reason. It differs from an emergency power system, which takes time to activate because it kicks in instantly during an outage. If you cannot afford to lose power during a project – like an all-day download – a UPS is your best option to protect against data loss and prevent system interruption. That’s why it’s called uninterruptible because it completely overrides an outage.

There are three main types of uninterrupted power supplies, namely the on-line, the line-interactive and the standby. An on-line UPS accepts an alternating current (AC) input, converts it into direct current (DC) to send it through the rechargeable battery, and then turns it back into an alternating current to power the protective equipment. A line-interactive UPS redirects the battery’s DC path from charging mode to supplying mode during an outage. It’s a very intuitive machine that can maintain power reserves during continuous undervoltage or overvoltage situations by selecting the perfect amount of backup power to supply. A standby system (also known as an off-line system) is directly powered by a standard AC wall outlet, and it only provides backup power if the main power source fails. Standby UPS systems are the simplest and most popular type for personal computers, offering basic features like surge protection and a backup battery.

For especially large power needs, a dynamic UPS is appropriate. Dynamic models use a synchronous alternator that is connected to the main equipment through a choke. The unit stores energy in a flywheel, and during an outage, an Eddy-current regulator holds onto the power. Recently, technicians developed a fuel cell UPS, which is more environmentally friendly and quiet. It uses hydrogen and a fuel cell as a power source and is ideal for small areas.

Common Causes Of Power Outages

There are several reasons the power goes out ranging from human error to natural disasters. In a strong storm, a tree can fall on a power line, breaking it and cutting off power to an entire neighborhood or town. If you live in an area with extreme weather, always let the city tree trimmers do their mandated work in your yard – they are doing it for your safety, and possibly removing shrubbery that’s too close to a power line. If a storm doesn’t cause a tree to fall, it could send a lightning bolt into a power line, or cause a flood that damages above or below-ground electrical equipment.

If you live in an area with a lot of wildlife activity, a UPS can be invaluable. An animal can crawl onto a transformer or fuse, causing the equipment to automatically shut down to protect the rest of the system, rendering you powerless. If you live in a remote area, you could be tens of miles away from a building with power, so you need to provide your own.

Construction work on your property or street can cause a power outage. Workers can accidentally drill into a power line, or back a tractor over one. A car crashing into a pole could cause an outage, too. Familiarize yourself with important safety precautions, in case there is ever a loose power line on your street. In addition to having a UPS ready, you should know what to do if you can't regain power for several hours.

The Largest UPS In The World

In Fairbanks, Alaska, where temperatures can drop as low as negative 50 degrees celsius, power outages used to be a common problem. The remote nature of the state means an outage could be very dangerous since the only way for residents to travel to another state is by boat or plane. If communication towers are down, navigating either of these vessels is dangerous. Within Alaska, there are also people living in almost total isolation, so they’re nearly helpless if their power fails. People simply cannot survive if their heater breaks in negative 50-degree weather.

In August 2010, technology group ASEA Brown Boverithe (ABB) installed the world’s largest UPS in Fairbanks. The system is made up of a converter designed by ABB, and nickel cadmium batteries created by battery manufacturer Saft. The converter turns the batteries’ DC power into AC power, and can produce up to 27 megawatts of power for 15 continuous minutes. That quarter of an hour gives the system time to retrieve backup generation. The system can deliver 46 megawatts of power for an even shorter time frame, but Fairbanks primarily needs it to deliver power just long enough for backup generation to start up.

The UPS can operate in seven different modes, one of which is automatic scheduling, which offers immediate system support if a breaker trips on a transmission line or local generator. It also has a power system stabilizer mode, which works to dampen power system oscillations. In charging mode, a dispatcher controls at what rate megawatts charge the UPS, and when the system can begin charging again after an emergency discharge.

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Last updated on May 17, 2017 by multiple members of the ezvid wiki editorial staff

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