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10 Best Ups Uninterrupted Power Supplies 2025 in the United States

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Our Top Picks

#1

Winner

Amazon Basics UPS Battery Backup & Surge Protector 400VA/255W, 6 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black

Rating
9.9
Chosen by1,147
Power Capacity (VA/W)
Battery Runtime
Form Factor

Most important from
13168 reviews

Power Capacity (VA/W)
Limited power capacity makes it suitable for basic setups but not for high-power devices or larger configurations.
Battery Runtime
Short battery run time of about 5-10 minutes is enough to save work and shut down properly but may not suffice for extended outages.
Form Factor
Compact and lightweight design makes it easy to place in various setups without taking up much space.
Automatic Voltage Regulation (AVR)
Reliable performance during outages and voltage fluctuations keeps essential devices running smoothly.

The Amazon Basics UPS Battery Backup & Surge Protector offers a 400VA/255W power capacity, making it suitable for small home networks, IoT devices, and home entertainment systems. With 6 outlets in total, it includes 3 surge-protected outlets and 3 outlets that provide both battery backup and surge protection. This ensures that your devices are protected during power surges and can stay powered on during short outages, giving you enough time to shut them down properly during longer outages.

The compact size (7.24 x 4.33 x 3.22 inches) allows it to fit easily into any home or office setup, and the 5-foot cord with a right-angle plug adds convenience for various placement options. One notable feature is the Automatic Voltage Regulation (AVR), which helps maintain a steady voltage, preventing damage to your devices from voltage fluctuations.

The device also supports communication through downloadable power management software, which can be useful for monitoring and managing power usage. It is essential to keep the load below 80% of the rated capacity to ensure optimal performance. This UPS is a solid choice for users needing basic power protection for smaller devices.

Rating
9.9
Chosen by1,147
Power Capacity (VA/W)
Battery Runtime
Form Factor

Most important from
13168 reviews

Power Capacity (VA/W)
Limited power capacity makes it suitable for basic setups but not for high-power devices or larger configurations.
Battery Runtime
Short battery run time of about 5-10 minutes is enough to save work and shut down properly but may not suffice for extended outages.
Form Factor
Compact and lightweight design makes it easy to place in various setups without taking up much space.
Automatic Voltage Regulation (AVR)
Reliable performance during outages and voltage fluctuations keeps essential devices running smoothly.
#2

Amazon Basics UPS Battery Backup & Surge Protector 800VA/450W, 12 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black

Rating
9.8
Power Capacity (VA/W)
Battery Runtime
Form Factor

Most important from
13168 reviews

Power Capacity (VA/W)
Although it has a limited power capacity, it's suitable for basic setups, protecting a single computer and a few peripherals.
Battery Runtime
The battery run time is relatively short, lasting about 5-10 minutes, enough to save work and shut down properly during an outage.
Form Factor
The compact and lightweight design makes it easy to place on or under a desk, perfect for home offices or small setups.
Automatic Voltage Regulation (AVR)
The UPS provides consistent power backup during outages and voltage fluctuations, keeping devices running smoothly.

The Amazon Basics UPS Battery Backup & Surge Protector offers a compact and efficient solution for ensuring uninterrupted power to your devices during outages and power surges. With an 800VA/450W power capacity, it's suitable for desktop computers, home networks, IoT devices, and home entertainment systems. It features a total of 12 outlets, with six dedicated to surge protection and six providing both surge protection and battery backup, allowing you to connect multiple devices simultaneously.

The small form factor makes it easy to integrate into any home or office environment, and the 5-foot cord with a right-angle plug enhances user convenience in tight spaces. However, it operates as a standby UPS, which might not provide the purest sine wave output compared to higher-end models, potentially affecting the performance of sensitive electronics. Additionally, it lacks Automatic Voltage Regulation (AVR), which means it may not handle voltage fluctuations as efficiently as AVR-equipped models.

While it offers a reliable battery runtime for short outages, you'll need to ensure your connected devices don't exceed 80% of the unit's rated capacity for optimal performance. The downloadable power management software can help monitor the UPS's status, although the lack of communication ports means remote management is limited. This UPS is best suited for users with moderate power needs looking for a cost-effective and space-saving solution.

Rating
9.8
Power Capacity (VA/W)
Battery Runtime
Form Factor

Most important from
13168 reviews

Power Capacity (VA/W)
Although it has a limited power capacity, it's suitable for basic setups, protecting a single computer and a few peripherals.
Battery Runtime
The battery run time is relatively short, lasting about 5-10 minutes, enough to save work and shut down properly during an outage.
Form Factor
The compact and lightweight design makes it easy to place on or under a desk, perfect for home offices or small setups.
Automatic Voltage Regulation (AVR)
The UPS provides consistent power backup during outages and voltage fluctuations, keeping devices running smoothly.
#3

EATON CORPORATION Uninterrupted Power Supply (9PX3000GLRT)

The EATON CORPORATION Uninterrupted Power Supply (9PX3000GLRT) is a robust option in the UPS category, especially suited for critical systems requiring a reliable power source. With a power capacity designed to handle substantial loads, it ensures that even power-hungry devices remain operational during outages. The double-conversion online topology provides superior power quality by delivering consistent and clean power, which is ideal for sensitive equipment. Additionally, the built-in automatic voltage regulation (AVR) stabilizes the incoming power, further protecting your devices from voltage fluctuations.

The UPS features a full system self-test at power up and an ABM test every 30 days, ensuring the system is always functioning optimally and extends the battery life. Users will also appreciate the detachable L6-20P to C19 input cord for flexibility in setup. However, the unit is relatively heavy at 60.4 pounds, which might be cumbersome for some users to install or move. Its size, with dimensions of 23.8 x 17.3 x 3.4 inches, requires adequate space for installation.

Users looking for a reliable and high-capacity UPS will find the EATON 9PX3000GLRT a capable choice, though its weight and size are considerations to keep in mind.

Buying Guide for the Best Ups Uninterrupted Power Supplies

When choosing an Uninterrupted Power Supply (UPS), it's important to understand your power needs and the features that will best protect your equipment. A UPS provides backup power during outages and protects against power surges, ensuring that your devices remain operational and safe. To make an informed decision, consider the following key specifications and how they align with your requirements.
Power Capacity (VA/W)Power capacity, measured in Volt-Amperes (VA) and Watts (W), indicates the maximum load a UPS can handle. This is crucial because it determines how many devices you can connect and how long they can run during a power outage. Small home setups might need a UPS with a capacity of 600-1000 VA, while larger offices or server rooms may require 1500 VA or more. To choose the right capacity, add up the power requirements of all the devices you plan to connect and select a UPS that can handle at least that amount.
Battery RuntimeBattery runtime refers to how long the UPS can provide power to your devices during an outage. This is important 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, while longer runtimes (20 minutes or more) are better for critical systems that need to stay operational longer. Consider your typical power outage duration and the criticality of your devices when choosing the runtime.
Number of OutletsThe number of outlets on a UPS determines how many devices you can connect. This is important for ensuring that all your essential equipment can be protected. Basic models may have 4-6 outlets, while more advanced models can have 8 or more. Count the number of devices you need to protect and ensure the UPS has enough outlets to accommodate them. Additionally, check if the outlets are spaced to fit larger plugs or adapters.
Form FactorForm factor refers to the physical size and shape of the UPS. This is important for ensuring that the UPS fits in your available space. Desktop models are compact and suitable for home offices or small setups, while tower or rack-mounted models are designed for larger office environments or server rooms. Consider where you will place the UPS and choose a form factor that fits your space and setup.
Waveform TypeWaveform type refers to the shape of the electrical output provided by the UPS. This is important for compatibility with your devices. There are two main types: simulated sine wave and pure sine wave. Simulated sine wave UPS units are generally more affordable and suitable for most home and office electronics. Pure sine wave UPS units provide cleaner power and are better for sensitive equipment like servers, medical devices, and high-end audio/video equipment. Choose the waveform type based on the sensitivity of your devices.
Automatic Voltage Regulation (AVR)Automatic Voltage Regulation (AVR) helps maintain a consistent voltage level to your devices, protecting them from voltage fluctuations. This is important for preventing damage to your equipment and ensuring stable performance. UPS units with AVR are beneficial in areas with frequent voltage fluctuations. If you experience unstable power in your area, look for a UPS with AVR to protect your devices.
Communication PortsCommunication ports allow the UPS to connect to your computer or network for monitoring and management. This is important for receiving alerts, performing automatic shutdowns, and managing power settings. Common ports include USB, serial, and network ports. If you need to monitor your UPS remotely or integrate it with your network, choose a model with the appropriate communication ports.

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