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Best Uninterruptible Power Supply
Updated August 2021
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Pros
Cons
Best of the Best
APC UPS Battery Backup & Surge Protector with AVR, 1500VA
APC
UPS Battery Backup & Surge Protector with AVR, 1500VA
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Compact Dynamo
Bottom Line

Excellent power output for its size, protecting several electronics at once during outages, with an intuitive interface for pinpoint control.

Pros

Smaller and lighter mini-tower UPS that matches larger towers in power output. Included software helps monitor battery and can be configured to shut down a PC during a power outage. Automatic voltage regulation protects from minor power blips.

Cons

User must connect the battery on a new unit, so it’s not ready to go out of the box.

Best Bang for the Buck
APC UPS Battery Backup & Surge Protector with USB Charger, 600VA
APC
UPS Battery Backup & Surge Protector with USB Charger, 600VA
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Long Battery Life
Bottom Line

With its dedicated battery backup configuration, this modest-looking UPS delivers plenty of power for multiple electronics.

Pros

Provides at least 30 minutes of backup power to electronics. Includes silent mode to prevent annoying alert beeps. Includes software for more precise UPS control.

Cons

Battery performance may degrade significantly after the first 12 to 18 months.

CyberPower Intelligent LCD UPS System
CyberPower
Intelligent LCD UPS System
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Plenty of Power Outlets
Bottom Line

A robust UPS that conditions power well and keeps electronics powered during an outage long enough to safely shut them down.

Pros

12 outlets populate this mini-tower UPS, with 6 benefiting from battery backup – enough to protect almost all home office electronics. Includes automatic voltage regulation, helping extend the life of the battery. Software available to monitor and control the UPS. Battery life is impressive, powering longer than rated at half-load.

Cons

Ethernet ports are somewhat loose and can sink too far into the UPS body to use effectively.

Tripp Lite 1500VA UPS
Tripp Lite
1500VA UPS
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Best for Brownouts
Bottom Line

This chunky tower unit is a reliable mainstay for homes in areas that are prone to power brownouts and blackouts.

Pros

A squarish mini-tower unit that offers 10 total outlets (5 on battery backup). When running a generator, the unit handles the power feed without an issue, conditioning power output to multiple electronics.

Cons

Plastic parts on casing can break easily, so be careful when moving the unit.

CyberPower Ecologic UPS System, 850VA/510W
CyberPower
Ecologic UPS System, 850VA/510W
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Good for Home Office
Bottom Line

A powerful and compact UPS hampered by a less-than-perfect rechargeable battery.

Pros

Great power output for a desktop UPS. A bright LCD panel is a standout feature at this price point. Includes software to monitor and control UPS, and shut down computer automatically during power failure.

Cons

Battery life is widely variable, with most lasting through the entire 3-year warranty period and others failing earlier.

HOW WE TESTED

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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52
Models
Considered
121
Consumers
Consulted
24
Hours
Researched
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An Uninterruptible Power Supply (UPS) provides a steady electrical current to electronics or electrical equipment in the event of a power failure thanks to an onboard rechargeable battery. It also provides a limited amount of protection against power surges that can fatally damage electronics. And with multiple outlets, a UPS can power several devices at once. As great as this sounds, the UPS isn’t infallible. Plugging in too many appliances or electronics and using a UPS that isn’t rated to handle high-power devices can damage the UPS over time so that it doesn’t work correctly when an emergency strikes and the power goes out.

Our Top Picks
APC
Best of the Best
APC
UPS Battery Backup & Surge Protector with AVR, 1500VA
Bottom Line
Excellent power output for its size, protecting several electronics at once during outages, with an intuitive interface for pinpoint control.
Shop Now
APC
Best Bang for the Buck
APC
UPS Battery Backup & Surge Protector with USB Charger, 600VA
Bottom Line
With its dedicated battery backup configuration, this modest-looking UPS delivers plenty of power for multiple electronics.
Shop Now
CyberPower
Top Pick
CyberPower
Intelligent LCD UPS System
Bottom Line
A robust UPS that conditions power well and keeps electronics powered during an outage long enough to safely shut them down.
Shop Now
Tripp Lite
Top Pick
Tripp Lite
1500VA UPS
Bottom Line
This chunky tower unit is a reliable mainstay for homes in areas that are prone to power brownouts and blackouts.
Shop Now
CyberPower
Top Pick
CyberPower
Ecologic UPS System, 850VA/510W
Bottom Line
A powerful and compact UPS hampered by a less-than-perfect rechargeable battery.
Shop Now