10 Best Pure Sine Wave UPS
for March 2023

MOOZ's editors independently choose recommendations. Purchases made through our links may earn us commissions.

Uninterruptible Power Supply (UPS) units keep your devices running during a power outage. They come in many shapes and sizes, including larger, floor-standing units that can power your computer and monitor as well as smaller, palm-sized units designed specifically for laptops and mobile devices. Pure sine wave UPS units provide the purest form of power, ensuring all of your devices run at optimal efficiency, while UPS units that offer modified sine wave power typically deliver power with less distortion and are able to only power select devices.

We've tested several UPS units over the years, testing them for output, power efficiency and ease of use. Our pros evaluate the size and portability of each, as well as the number of outlets and ports. With so many options on the market, we've narrowed it down to the best pure sine wave UPS units, that will keep your devices running when you need them most.

1
9.9
SCORE
APC Smart-UPS 3000VA UPS Battery Backup with Pure Sine Wave Output (SMT3000)

APC Smart-UPS 3000VA UPS Battery Backup Pure with Sine Wave Output (SMT3000)

by APC
What We like

Pure Sine Wave UPS provides highest degree of compatibility with active PFC power supplies and electronics

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Product Features

  • Network-grade power supply conditioning protects from damaging surges and disruptive noise. Solid state automatic voltage regulation (AVR) boosts low input voltage and trims high voltage without battery operation. Network manageable via serial, USB or optional ethernet
  • Waveform Type: Sine wave
  • Output Frequency (sync to mains): 47~53Hz for 50Hz nominal, 57~63Hz for 60Hz nominal
  • Output Power Capacity: 2700 Watts/3000 VA
  • Smart UPS battery backup with LCD Display
2
9.5
SCORE
APC Smart-UPS 1500VA UPS Battery Backup with Pure Sine Wave Output Rack-Mount/Tower (SMC1500-2U)(Not Sold in Vermont)

APC Smart-UPS 1500VA UPS Battery Backup with Pure Wave Sine Output Rack-Mount/Tower (SMC1500-2U)(Not Sold in Vermont)

by Maruson
What We like

Pure Sine Wave UPS provides highest degree of compatibility with active PFC power supplies and electronics

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Product Features

  • 1500VA / 900W Battery Backup Uninterruptible Power Supply (UPS)
  • This model is not sold in Vermont
  • Network-grade power supply conditioning protects from damaging surges and disruptive noise. Solid state automatic voltage regulation (AVR) boosts low input voltage and trims high voltage without battery operation. Network manageable via serial, USB or optional ethernet
  • 6 battery backup and surge protector outlets
  • Rack-Mountable smart UPS power supply
3
9.4
SCORE
V7 UPS 1500VA Rack Mount 2U Pure Sine Wave (UPS1RM2U1500-1N), Black

V7 UPS 1500VA Rack Mount Pure 2U Sine Wave (UPS1RM2U1500-1N)

by V7
What We like

When you first open the UPS System, please ensure the battery is connected inside by sliding down the front cover and connecting the battery cable.

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Product Features

  • Programmable power management outlets maximize backup time to critical devices by setting shorter backup time for non-critical devices
  • 1500VA Rack Mount UPS with Pure Sine Wave Output with 8 Outlets
  • ECO (Efficiency Corrective Optimizer) for energy saving and EPO function (Emergency Power Off)
  • Boost and Buck AVR automatically adjusts for under-voltage and over-voltage ensuring stable power and longer life batteries
4
9.4
SCORE
APC Smart-UPS 1500VA UPS Battery Backup with Pure Sine Wave Output (SMT1500) (Renewed)

APC Smart-UPS 1500VA UPS Battery Backup Pure with Sine Wave Output (SMT1500) (Renewed)

by APC
What We like

In-Stock and Ready for Immediate Shipment

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Product Features

  • Shipped with Brand New Batteries Installed
5
8.9
SCORE
APC Smart-UPS 1000VA UPS Battery Backup with Pure Sine Wave Output (SMT1000) (Renewed)

APC Smart-UPS 1000VA UPS Battery Backup Pure with Sine Wave Output (SMT1000) (Renewed)

by APC
What We like

Fully Tested, Refurbished and Professionally Packaged

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Product Features

  • Shipped with Brand New, Factory Fresh Batteries Installed
  • In-Stock and Ready for Immediate Shipment
6
8.9
SCORE
Tripp Lite BC600SINE 600VA 375W UPS Battery Back Up Pure Sine Wave PFC Tower 120V USB, 6 Outlets Black

Tripp Lite BC600SINE 600VA 375W UPS Battery Back Pure Up Sine Wave PFC Tower 120V USB

by Tripp Lite
What We like

Provides 18 minutes battery runtime with a typical desktop computer system consuming 100 watts

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Product Features

  • Tripp Lite's BC600SINE tower, sine wave UPS system provides long lasting battery backup for a variety of computer and electronic applications
  • BC600SINE UPS system switches to battery derived sine wave AC output during power failures and severe voltage fluctuations with enough time to shut down without data loss
  • Sine wave output in both line and battery modes provides compatibility with all electronic loads, including PC and Mac systems fitted with Active Power Factor Corrected (PFC) power supplies
  • 650VA/375 watt UPS capacity with 3.3 minutes runtime at 100 percent load and 11.1 minutes at 50 percent load
7
8.5
SCORE
APC Smart-UPS 1500VA UPS Battery Backup with Pure Sine Wave Output (SMC1500)(Not Sold in Vermont)

APC Smart-UPS 1500VA UPS Battery Backup with Sine Pure Wave Output (SMC1500)(Not Sold in Vermont)

by APC
What We like

Pure Sine Wave UPS provides highest degree of compatibility with active PFC power supplies and electronics

more infoarrow_drop_down

Product Features

  • This model is not sold in Vermont
  • 1500VA / 900W Battery Backup Uninterruptible Power Supply (UPS)
  • Network-grade power supply conditioning protects from damaging surges and disruptive noise. Solid state automatic voltage regulation (AVR) boosts low input voltage and trims high voltage without battery operation. Network manageable via serial, USB or optional ethernet
  • 8 battery backup and surge protector outlets
  • Smart UPS battery backup with LCD Display
8
8.4
SCORE
APC Smart-UPS 750VA UPS Battery Backup with Pure Sine Wave Output (SMT750) (Not sold in Vermont)

APC Smart-UPS 750VA UPS Battery Backup with Pure Wave Sine Output (SMT750) (Not sold in Vermont)

by APC
What We like

Pure Sine Wave UPS provides highest degree of compatibility with active PFC power supplies and electronics

more infoarrow_drop_down

Product Features

  • High-efficiency green mode
  • This model is not sold in Vermont
  • 6 outlets. 120V
  • 6 battery backup and surge protector outlets
  • 750VA / 500W Battery Backup Uninterruptible Power Supply (UPS)
9
8.4
SCORE
Tripp Lite 750VA Smart UPS Back Up, Sine Wave, AVR, 120V 600W Line-Interactive, 1U Rackmount, USB, DB9 Serial, 2 & 3 Year Warranties, $250,000 Insurance (SMART750RM1U)

Tripp Lite 750VA Smart UPS Back Up

by TRIPP LITE
What We like

Supports a half load of 300W up to 13.2 min

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Product Features

  • 750 VA 600W UPS Battery Backup Uninterruptible Power Supply with AVR, Pure Sine Wave output (battery mode) & LEDs
  • Corrects brownouts and overvoltages from 83V to 147V
  • 120V NEMA 5-15P input with a 10 ft. cord, 6 NEMA 5-15R outlets- 2 switched load banks
  • USB, RS232, EPO and slot for Network Management Card options (See Tripp Lite's SNMPWEBCARD)
10
8.4
SCORE
APC 1000VA Smart UPS with SmartConnect, SMT1000C Sinewave UPS Battery Backup, AVR, 120V, Line Interactive Uninterruptible Power Supply Black

APC 1000VA Smart UPS with SmartConnect

by APC
What We like

Intelligent battery management in the Smart-UPS SMT1000C prolongs the battery life of the UPS by regulating the charge voltage in relation to battery temperature, and also provides a predictive month/year for battery replacement

more infoarrow_drop_down

Product Features

  • APC SmartConnect is the first cloud-enabled UPS for Distributed IT. Through a secure portal (via any internet-connected device), you can view the status of your UPS, receive notifications, get firmware updates and more.
  • Input: NEMA 5-15P. Output: (8) NEMA 5-15R
  • Automatic Voltage Regulation (AVR) adjusts high and low voltages to a safe level, helping preserve the life of the battery.
  • 1000VA / 700W Pure Sine Wave UPS battery backup

A Pure Sine Wave UPS is One of the Best UPS for Computer Systems

A UPS (Uninterrupted Power Supply) is an external power supply which is designed to provide emergency battery backup during power failures. UPSs vary in size, shapes, and capacity. The UPSs which come in a single phase configuration are usually designed to run on AC (alternating current) power. A pure sine wave UPS is one of these single phase UPSs. A pure sine wave UPS is able to provide clean and stable power. A pure sine wave UPS has 2 advantages over other UPSs. It generates less heat and noise and is almost silent. These UPSs are designed to provide clean and stable power.

What is a UPS?

UPSs, also known as uninterruptible power supplies, provide backup power for computers and other electronic devices. UPSs keep your computer running in the event of a power failure. They connect to the computer's power supply and take over when the main power supply fails. UPSs come in three kinds: pure sine wave, modified sine wave, and line interactive. A pure sine wave UPS is the best kind to use with sensitive electronics, such as computers, because it provides the cleanest, safest, and most reliable power. A modified sine wave UPS provides power that's close enough to a pure sine wave for most electronics. Line interactive UPSs provide a "soft" power that's closer to modified sine wave power. When shopping for a UPS, you need to consider how much power you need. Most UPSs come with a minimum rating, and if your devices need more power than what UPS is rated for, you must buy a higher-rated UPS. Some UPSs also feature a battery backup, which kicks in after you deplete the UPS's battery during a power failure. The battery backup stores enough energy to power your electronics until the UPS's power is restored.

What are the advantages and disadvantages of a UPS?

Uninterrupted power supply (UPS) devices can protect you from the damaging effects of power surges. The primary goal of a UPS is to protect your hardware, network, and data from sudden voltage fluctuations. UPS devices consist of a battery, inverter, and control board. The primary difference between UPS and generators is that a UPS is designed to maintain a constant flow of power while generators only provide backup power
UPS devices provide power to your hardware, network, and data during power outages. However, these devices are not always available, and may not be sufficient to prevent all data loss. UPS devices provide power to your hardware, network, and data during power outages. However, these devices are not always available, and may not be sufficient to prevent all data loss.

What's the difference between pure sine wave and modified sine wave?

UPS stands for uninterruptible power supply. If you were to switch one letter of UPS to P, then you would literally have pure sine wave UPS. Pure sine wave UPS works to emit power directly from the source. It is the safest form of power, and is ideal for sensitive electronic equipment. However, modified sine wave UPS has modified sine wave output, which is the best type of UPS for computers.

What are the different types of UPS?

UPS (uninterruptible power supply) is a device used to prevent malfunctioning or loss of power and protect your computers, printers, and other equipment from damages due to power disruptions. UPSs can be divided into two types:
UPSs with a sine wave output UPSs with a sine wave output are the most commonly used UPSs. It is an AC output, and the A in the name stands for alternating current. The device provides power through the main electrical line.
UPSs with a pure sine wave output UPSs with a sine wave output are less common. They are DC output, and the L in the name stands for linear. The device provides power through a series of batteries.

What are the recommended UPS for my home?

There are so many UPS's available on the market for homes and offices. What is the best UPS for me? UPS stands for Uninterrupted Power Supply; this basically means that it can supply power to a circuit or device when the power fails. UPS's are composed basically of five modules:
- Input modules: converts AC power into DC power.
- Output modules: converts DC power back into AC power.
- Battery module: provides power in the event of a power outage.
- Power factor correction module: removes power factor correction from the AC power before it is converted back to DC power.
- Power input module: provides AC power. If you are planning on powering a large computer, a UPS rated for 1.5 KVA or greater is recommended. If your equipment requires between 1 KVA and 1.5 KVA, you should purchase an UPS with a 1500VA-2000VA rating. If your equipment needs 500VA or less, a UPS rated between 100VA and 500VA should be used. It is highly recommended to use a UPS that has an Automatic Voltage Regulation (AVR) system. This allows for smoother voltage and frequency fluctuations, which can negatively affect computer equipment. When purchasing a UPS, you should consider the battery size of the model as well as the type of battery. Lithium-ion batteries will have a longer lifespan than standard batteries, but lithium batteries require special handling so be sure to read the manufacturer's manual before handling the batteries. This type of battery should be stored in a cool, dry place in order to prevent overheating and battery failure. A pure sine wave UPS will transfer power directly from the source (i.e., the utility company) without converting it. This will provide the most consistent power, although it may cause some strain on your computer equipment.

Conclusion

I hope this article has been helpful in helping you choose the best UPS for your needs. Let me know if you have any questions about the type of UPS you chose and how it's working out for you.

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