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10 Best Uninterruptible Power Supplies 2025 in the United States

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#1

Winner

Amazon Basics UPS Battery Backup & Surge Protector 600VA/360W, 8 Outlets, Standby Uninterruptible Power Supply, for Power Outage Protection, Compact, Black

Rating
9.7
Chosen by1,351
Power Capacity (VA/W)
Battery Runtime

Most important from
13399 reviews

Power Capacity (VA/W)
The unit is rated at 360W, and efficiency drops as you approach the maximum load; keeping it to 200W or less ensures better performance.
Battery Runtime
It offers around 26 minutes of battery time with a load of less than 200W, making it suitable for short-term outages.

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.

The compact design is a practical feature, allowing easy integration into tight spaces, and the 5-foot cord with a right-angle plug adds flexibility in placement. The standby UPS design means it provides power swiftly during outages, with enough battery runtime to safely shut down devices during longer interruptions. However, this type is generally not as efficient as line-interactive or online UPS systems for continuous power regulation.

Transfer time is an essential factor to consider as this UPS might not be ideal for very sensitive electronics needing immediate power continuity. The waveform type is not specifically mentioned, but typically, standby units like this provide a simulated sine wave, which might not be suitable for certain sensitive electronics, particularly those requiring a pure sine wave. The power management software is a helpful addition, giving more control over the UPS system and prolonging battery life. It's crucial to ensure that the load is kept below 80% of its capacity for optimal performance.

This UPS provides a decent balance of functionality and price for those needing basic power protection and battery backup, with the major strengths being its compact size, affordability, and sufficient outlets. However, its limitations in power capacity and waveform type might be a downside for users with more sensitive equipment or higher power needs.

Rating
9.7
Chosen by1,351
Power Capacity (VA/W)
Battery Runtime

Most important from
13399 reviews

Power Capacity (VA/W)
The unit is rated at 360W, and efficiency drops as you approach the maximum load; keeping it to 200W or less ensures better performance.
Battery Runtime
It offers around 26 minutes of battery time with a load of less than 200W, making it suitable for short-term outages.
#2

apc by Schneider Electric SRT3000RMXLT 3kVA 208V Smart UPS SRT 12 Power Supply SRT3000RMXLT

The APC by Schneider Electric SRT3000RMXLT 3kVA 208V Smart UPS is a robust uninterruptible power supply designed to provide reliable backup power. With a power capacity of 3000VA (3kVA), it's well-suited for small to medium-sized businesses needing to protect critical equipment from power interruptions.

The product features multiple outlets, ensuring that several devices can be connected simultaneously, making it versatile for different setups. The rack-mount form factor (34 x 23 x 9 inches) and substantial weight (69 pounds) may require dedicated space and robust support for installation. The UPS provides a sine wave output, ensuring compatibility with sensitive electronics like servers and network equipment.

Additional features such as high availability and scalability enhance its appeal, making it a flexible and cost-effective choice for growing businesses. This UPS is a reliable choice for those in need of a powerful and flexible backup power solution.

#3

APC UPS, 1000VA Smart-UPS Lithium-Ion UPS with SmartConnect and NMC, SMTL1000RM2UCNC, Pure Sine Wave, Short-Depth 120V Uninterruptible Power Supply

Rating
9.1
Form Factor

Most important from
23 reviews

Form Factor
The unit is smaller and lighter than its predecessors, making it a win-win for space-constrained setups.

The APC UPS, 1000VA Smart-UPS with SmartConnect and NMC offers reliable power backup with a capacity of 1000VA / 800W, making it suitable for small to medium-sized devices. It provides pure sine wave output, which is ideal for sensitive electronics. The unit includes 6 NEMA 5-15R battery backup outlets, allowing multiple devices to be connected simultaneously.

Its short-depth, 2U rackmount form factor is space-efficient, making it a good fit for professional environments where space is at a premium. The multi-function LCD console provides comprehensive status and control information, which enhances usability. The inclusion of a Network Management Card and SmartConnect feature allows for remote monitoring and management, improving convenience and support.

The SmartConnect feature offers a 6-month free trial, which is particularly beneficial for users new to remote UPS management. The 46-pound weight might be cumbersome for some users, but the warranty offering of 5 years for repair or replace is a strong point, ensuring peace of mind for extended use. This UPS is well-suited for IT professionals and businesses looking for a reliable and manageable power backup solution.

Rating
9.1
Form Factor

Most important from
23 reviews

Form Factor
The unit is smaller and lighter than its predecessors, making it a win-win for space-constrained setups.

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.

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