10 Best Uninterruptible Power Supplies 2026 in the United States
#1
Winner
Amazon Basics UPS Battery Backup & Surge Protector 1000VA/550W, 9 Outlets, Line Interactive Uninterruptible Power Supply, for Power Outage Protection, Black
The Amazon Basics UPS Battery Backup offers a solid 1000VA/550W power capacity, suitable for home or small office use where you need to protect computers, DVRs, or entertainment devices from outages and power surges. It includes 9 outlets, with 5 providing both battery backup and surge protection, which is handy for connecting multiple devices. The mini tower form factor is compact enough to fit under desks or in entertainment centers without taking up much space.
Rating
10.0
Chosen by1,136
Battery Runtime
Number of Outlets
Most important from
14527 reviews
#2
Amazon Basics UPS Battery Backup & Surge Protector 800VA/450W, 12 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
The Amazon Basics UPS Battery Backup & Surge Protector offers an 800VA/450W power capacity, which is suitable for home networks, entertainment devices, and small office setups. It provides a decent battery runtime, giving about 12 minutes of backup at half its load and around 2 minutes at full load—enough to safely shut down devices during outages. With 12 outlets—half dedicated to battery backup and surge protection and the other half for surge protection only—it offers generous connectivity for multiple devices. Its compact form factor allows it to fit easily on desks or shelves without taking up much space.
Rating
9.1
Battery Runtime
Number of Outlets
Additional Features
Most important from
14527 reviews
#3
Amazon Basics UPS Battery Backup & Surge Protector 600VA/360W, 8 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
The Amazon Basics UPS Battery Backup & Surge Protector provides 600VA/360W of power, making it a solid choice for home or small office use. Its power capacity is suitable for desktop computers, home networks, and entertainment systems, though it won't support heavy-duty equipment. With 8 outlets—4 surge-protected and 4 with both surge protection and battery backup—this UPS can accommodate several devices, offering basic protection against power surges and outages.
Rating
9.1
Power Capacity (VA/W)
Battery Runtime
Most important from
14527 reviews
Top 10 Best Uninterruptible Power Supplies 2026 in the United States
#1
Winner
Amazon Basics UPS Battery Backup & Surge Protector 1000VA/550W, 9 Outlets, Line Interactive Uninterruptible Power Supply, for Power Outage Protection, Black
Amazon Basics UPS Battery Backup & Surge Protector 1000VA/550W, 9 Outlets, Line Interactive Uninterruptible Power Supply, for Power Outage Protection, Black
Power Capacity (VA/W): 1000VA/550W
Battery Runtime: 7 min half load, 1 min full
Number of Outlets: 9
Form Factor: mini tower
Waveform Type: simulated sine wave
Transfer Time: typical line interactive UPS
Additional Features: line interactive with AVR
Chosen by 1136 this week
Amazon Basics UPS Battery Backup & Surge Protector 800VA/450W, 12 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Amazon Basics UPS Battery Backup & Surge Protector 800VA/450W, 12 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Power Capacity (VA/W): 800VA/450W
Battery Runtime: 12 min half load, 2 min full
Number of Outlets: 12
Form Factor: Compact
Waveform Type: Simulated sine wave
Transfer Time: Slightly slower standby UPS
Additional Features: Surge protection, power management software
Amazon Basics UPS Battery Backup & Surge Protector 600VA/360W, 8 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Amazon Basics UPS Battery Backup & Surge Protector 600VA/360W, 8 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Power Capacity (VA/W): 600VA/360W
Battery Runtime: enough runtime for safe shutdown
Number of Outlets: 8
Form Factor: compact design
Waveform Type: simulated sine wave
Transfer Time: not ideal for sensitive electronics
Additional Features: power management software
Amazon Basics UPS Battery Backup & Surge Protector 400VA/255W, 6 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Amazon Basics UPS Battery Backup & Surge Protector 400VA/255W, 6 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black
Power Capacity (VA/W): 400VA/255W
Number of Outlets: 6
Form Factor: Small, compact design
Waveform Type: Standby
Additional Features: Power management software
Liebert Vertiv PSI5 Lithium-Ion Short-Depth 3kVA 2700W 120V 3U Rack/Tower UPS
Liebert Vertiv PSI5 Lithium-Ion Short-Depth 3kVA 2700W 120V 3U Rack/Tower UPS
Power Capacity (VA/W): 3000VA/2700W
Form Factor: 3U rack/tower
Additional Features: Lithium-ion battery, rack/tower, short-depth, 5-year warranty
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Liebert GXT4 UPS w/Network Card - 6000VA/4800W 208V/120V, Online Double Conversion Rack Mount/Tower UPS, Uninterruptible Power Supply, Sine Wave, AVR, Battery Backup(GXT4-6000RT208)
Liebert GXT4 UPS w/Network Card - 6000VA/4800W 208V/120V, Online Double Conversion Rack Mount/Tower UPS, Uninterruptible Power Supply, Sine Wave, AVR, Battery Backup(GXT4-6000RT208)
Power Capacity (VA/W): 6000VA/4800W
Battery Runtime: 5 min at full load
Waveform Type: pure sine wave
Transfer Time: virtually zero
Additional Features: network card, hot-swappable batteries, external battery option
Liebert GXT4 UPS 3000VA/2700W 120V, Online Double Conversion Rack Tower, Energy Star, Uninterruptible Power Supply, Sine Wave Battery Backup with Surge Protection(GXT4-3000RT120), black
Liebert GXT4 UPS 3000VA/2700W 120V, Online Double Conversion Rack Tower, Energy Star, Uninterruptible Power Supply, Sine Wave Battery Backup with Surge Protection(GXT4-3000RT120), black
Power Capacity (VA/W): 3000VA/2700W
Battery Runtime: about 3 minutes full load
Form Factor: rack/tower
Waveform Type: sine wave
Additional Features: online double-conversion, hot-swappable battery
Vertiv Liebert GXT5 UPS - 1500VA/1350W 120V, Online Double Conversion, 2U Rack/Tower, Energy Star Certified, Lead Acid, Sine Wave, Battery Backup, 0.9 Power Factor, Colored LCD (GXT5-1500LVRT2UXL)
Vertiv Liebert GXT5 UPS - 1500VA/1350W 120V, Online Double Conversion, 2U Rack/Tower, Energy Star Certified, Lead Acid, Sine Wave, Battery Backup, 0.9 Power Factor, Colored LCD (GXT5-1500LVRT2UXL)
Power Capacity (VA/W): 1500VA/1350W
Battery Runtime: good for brief outages
Number of Outlets: four programmable outlets
Form Factor: 2U rack/tower
Waveform Type: pure sine wave
Additional Features: color LCD, gravity sensing, Energy Star
#10
Vertiv Liebert PSI5 Lithium-Ion UPS - 1500VA/1350W 120V Mini Tower Line Interactive AVR (PSI5-1500MT120LI)
Vertiv Liebert PSI5 Lithium-Ion UPS - 1500VA/1350W 120V Mini Tower Line Interactive AVR (PSI5-1500MT120LI)
Power Capacity (VA/W): 1500VA (1350W)
Form Factor: mini-tower
Waveform Type: sine wave
Additional Features: lithium-ion battery, line-interactive AVR
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Buying Guide for the Best Uninterruptible Power Supplies
Choosing the right uninterruptible power supply (UPS) is crucial to ensure that your electronic devices remain powered during outages and are protected from power surges. A UPS can be a lifesaver for both home and office environments, providing backup power and safeguarding your equipment. To make an informed decision, you need to understand the key specifications and how they align with your needs.Power Capacity (VA/W)Power capacity, measured in Volt-Amps (VA) and Watts (W), indicates the maximum load a UPS can handle. This spec is important because it determines how many devices you can connect to the UPS and how long they can run during a power outage. For small home setups, a UPS with a capacity of 600-1000 VA might be sufficient. For larger setups or small offices, you might need 1000-2000 VA. For enterprise environments, capacities above 2000 VA are often necessary. To pick the right one, calculate the total wattage of all devices you plan to connect and choose a UPS with a capacity that exceeds this total.
Battery RuntimeBattery runtime refers to how long the UPS can provide power to your devices during an outage. This is crucial for ensuring that you have enough time to save your work and safely shut down your equipment. Short runtimes (5-10 minutes) are suitable for brief outages or for giving you time to save your work. Medium runtimes (10-30 minutes) are better for longer outages or if you need more time to complete tasks. Long runtimes (30+ minutes) are ideal for critical systems that need to stay operational for extended periods. Choose a runtime based on how long you need your devices to stay powered during an outage.
Number of OutletsThe number of outlets on a UPS determines how many devices you can connect. This is important for ensuring that all your critical devices are protected and powered during an outage. For a small home setup, 4-6 outlets might be enough. For a larger home office or small business, 6-10 outlets could be necessary. For larger setups, more than 10 outlets might be required. Consider the number of devices you need to protect and choose a UPS with enough outlets to accommodate them.
Form FactorThe form factor of a UPS refers to its physical size and shape, which can affect where you can place it. This is important for ensuring that the UPS fits in your desired location. Desktop or tower UPS units are suitable for home or small office use where space is limited. Rack-mounted UPS units are designed for server rooms or data centers where they can be installed in standard equipment racks. Choose a form factor that fits your available space and installation preferences.
Waveform TypeThe waveform type of a UPS indicates the quality of the power it provides. This is important for ensuring compatibility with sensitive equipment. Simulated sine wave UPS units are generally sufficient for most home and office electronics. Pure sine wave UPS units provide higher quality power and are necessary for sensitive equipment like servers, medical devices, and high-end audio/video equipment. Choose a waveform type based on the sensitivity of the devices you need to protect.
Transfer TimeTransfer time is the duration it takes for the UPS to switch from mains power to battery power during an outage. This is important for ensuring that your devices experience minimal interruption. Short transfer times (2-4 milliseconds) are ideal for sensitive equipment that cannot tolerate power interruptions. Standard transfer times (4-8 milliseconds) are suitable for most home and office electronics. Choose a transfer time based on the sensitivity of your devices and how much interruption they can tolerate.
Additional FeaturesAdditional features such as LCD displays, USB charging ports, and network management capabilities can enhance the functionality of a UPS. These features are important for monitoring the status of the UPS, charging mobile devices, and managing the UPS remotely. Consider which additional features are important to you and choose a UPS that offers them. For example, an LCD display can provide real-time information about power status and battery life, while network management capabilities can be useful for managing multiple UPS units in a larger setup.