Uninterruptible power supplies for computers: rating of the best UPSs

To ensure the safety of information and minimize the risk of breakdown of office equipment, it is necessary to use an uninterruptible power supply for your computer - the device is responsible for the continuity of electricity supply in a certain time interval.

The use of a UPS is especially important when there are frequent outages or problems with the quality of the supplied electricity. Uninterruptible power supplies have differences in the power supply circuit, differ in power and other parameters, so you need to have a good understanding of the characteristics of those devices that are on sale.

To make the choice easier, we have prepared a review of the best UPS offers, described the operating features of different types of household uninterruptible power supplies, and also identified the main parameters that must be taken into account when purchasing such devices.

TOP 12 computer uninterruptible power supplies

Place
Product
Rating
output power
Input voltage
Power connectors
Price
Reserve models
#2
91
/ 100
350 W
164-275 V
3
#3
90
/ 100
250 W
164-275 V
3
Interactive models
#1
94
/ 100
390 W
154-290 V
4
#3
90
/ 100
240 W
165-290 V
4
Double conversion models

Reserve models

#1

IPPON Back Verso 800

Backup UPS with multi-level protection for computer and household appliances

Expert rating:
94
/ 100

A backup UPS is in demand among buyers due to its good cost, quality and power ratio. The Back Verso 800 model is universal in use - there are six European sockets.

The uninterruptible power supply protects against short circuits, network overloads and high-voltage pulses. Interference filtering is provided, and there is a port for a telephone line.

Specifications:

  • power supply circuit – backup;
  • switching time – 6 ms;
  • input voltage range – 170-260 V;
  • maximum power – 480 W;
  • autonomous operation - at 100% load - 1.5 minutes, at 30% load - 14.8 minutes;
  • number of connectors – 6 Euro sockets, 4 of them battery powered;
  • interface – LED indication, sound notification, on/off button;
  • background noise – 40 dB;
  • dimensions – 13x21x25 cm;
  • weight – 7 kg.

The UPS is not designed to accept an external additional battery. To replace the battery, the uninterruptible power supply must be disconnected from the network. It will take 16 hours to fully restore the battery charge.

Users are satisfied with the purchase.The unit is quite compact, does not take up much space, is easy to operate and operates quite quietly.

The main disadvantages include the lack of a USB interface - you cannot make complex settings, for example, set the computer to automatically turn off when the UPS charge critically decreases.

Advantages
  • Acceptable cost
  • High effective output power - 480 W
  • Cold start option
  • 6 power connectors - Euro sockets
  • Variety of protection functions
Flaws
  • No USB interface
  • Loud, persistent buzzer
  • No battery charge indicator light
#2

Powercom WOW-700 U

Popular model with USB interface, light and sound indication system

Expert rating:
91
/ 100

A model that looks similar to a surge protector. The Chinese-assembled Powercom WOW-700 U UPS has three sockets. Uninterruptible power supply is designed to serve one workstation with a computer of low power consumption.

Specifications:

  • power supply circuit – backup;
  • switching time – 4 ms;
  • input voltage range – 164-275 V;
  • maximum power – 350 W;
  • battery life – 2.5 minutes at 350 W;
  • number of output connectors – 3, of which 2 are reserve;
  • interface – LED indicators, USB interface;
  • background noise – 40 dB;
  • dimensions – 11x8x33 cm;
  • weight – 2.6 kg.

This model provides protection for the telephone line and local network. The UPS provides the ability to replace the battery without turning off the uninterruptible power supply. Battery charging time is 6 hours.

Advantages
  • Hot swap battery
  • There is a USB interface
  • Clear display system
  • Variety of protection functions
  • Compact dimensions
Flaws
  • Noise when running on battery
  • Does not “accept” small loads
  • Non-standard battery shape - difficult to find a replacement
#3

Powercom WOW-500U

Compact low-power UPS with three output connectors

Expert rating:
90
/ 100

The backup uninterruptible power supply WOW-500 U from Powercom is almost a complete analogue of the previous model WOW-700 U. The UPS output provides 250 W, so you should not count on connecting powerful equipment.

The model has a 3.2 Ah battery, providing 7 minutes of battery life for a personal computer with a 15-inch monitor. It will take 6 hours to restore the battery.

Specifications:

  • power supply circuit – backup;
  • switching time – 2-4 ms;
  • input voltage range – 164-275 V;
  • maximum output power – 250 W;
  • autonomous operation - when connecting a load with a power of 200 W - 2 minutes;
  • number of connectors – 3 Euro sockets, 2 of which are battery powered;
  • interface – LED indication, sound notification, on/off button;
  • background noise – up to 40 dB;
  • dimensions – 11x8x33 cm;
  • weight – 2.58 kg.

The WOW-500 U has separable RJ-11/RJ-45 sockets for telephone line and data transmission. The uninterruptible power supply has compact dimensions - it can be placed on the floor or hung on the wall.

Advantages
  • Hot swap battery
  • Many protective functions
  • Compact dimensions
  • Light and sound indication system
  • Universal power connectors - CEE 7 (Euro socket)
Flaws
  • Small output power
  • Battery has a non-standard shape - difficult to find a replacement
  • Weak glow of diodes
#4

Powercom SPIDER SPD-1000N

Good power output/cost ratio

Expert rating:
90
/ 100

The SPD-1000N UPS from the Powercom brand is designed to protect network storage, computers, modems, workstations and other devices.UPS is relevant for offices where low-power PCs are used and it is important to ensure correct shutdown and stable operation of the equipment.

Specifications:

  • power supply circuit – backup;
  • switching time – 6 ms;
  • input voltage range – 165-275 V;
  • maximum output power – 250 W;
  • Autonomous operation - at a load of 150 W - 19 minutes, 530 W - 3 minutes;
  • number of connectors – 8 Euro sockets, 4 of which are battery powered;
  • interface – LED indication, sound notification, on/off button;
  • noise – 40 dB;
  • dimensions – 29x10x23 cm;
  • weight – 4.47 kg.

This device is designed to connect several low-power electrical consumers. Like every backup UPS, the Spider SPD-1000N has no fan, so it runs very quietly. The plugs are designed for European standard sockets.

Advantages
  • High power - 550 W
  • Cold start and hot battery swap
  • Green Mode technology - saving battery energy
  • 8 euro sockets
  • Quiet operation
Flaws
  • During the first time of use, you will notice a plastic smell.
  • Regular plugs do not lock
  • Short cable

Interactive models

#1

3Cott 650-OFC

Line-interactive uninterruptible power supply with automatic voltage stabilizer

Expert rating:
94
/ 100

The Office Line series uninterruptible power supply is designed for office equipment. The device protects equipment from radio frequency and electromagnetic interference, increases and decreases in voltage in the electrical network. A 7 Ah battery supports autonomous operation of connected equipment.

The UPS has a Green Mode battery energy saving function. Automatic voltage regulation is carried out using a stabilizer with 2 stages of increase and 1 stage of decrease.

Specifications:

  • power supply diagram – interactive;
  • switching time – 5 ms;
  • input voltage range – 154-290 V;
  • maximum output power – 390 W;
  • Autonomous operation – 8 minutes at half load;
  • number of connectors – 4 computer sockets IEC 320 C13 with redundancy;
  • interface – LED indicators, sound alarm, on/off button;
  • noise – 40 dB;
  • dimensions – 10x17x31cm;
  • weight – 4.8 kg.

Reviews about the uninterruptible power supply are mostly positive. The battery life is enough to shut down correctly and save all data on the computer. When purchasing a 3Cott 650-OFC, it is worth considering that the model has computer power connectors. To connect equipment with a Euro plug you will need an adapter.

Advantages
  • Energy saving function - Green Mode
  • Cold start option
  • Good power to price ratio
  • Light and sound indicators
  • RJ-11 modem interface
Flaws
  • No hot swap battery option
  • UPS fuse type - fuse
  • No USB port
  • Computer power connector
#2

Ippon Back Comfo Pro 600 New

Functional UPS: 8 Euro sockets, software, USB and RS-232 interfaces

Expert rating:
92
/ 100

The UPS with an effective output power of 360 W has a large number of outputs and long battery life.

The UPS is equipped with 8 European format sockets, 6 of which have battery backup. The model has USB and RS-232 connectors.

Specifications:

  • power supply diagram – interactive;
  • switching time – 5 ms;
  • input voltage range – 162-268 V;
  • maximum power – 360 W;
  • battery life – 19.2 minutes at 110 W, 6 minutes at 180 W;
  • number of output connectors – 8 Euro sockets, 6 of them with backup power;
  • interface – LED indicators, ON button, sound signal;
  • background noise – 40 W;
  • weight – 5.7 kg.

The package includes a telephone cable, interface cables for communication with a PC, and a disk with software.

This model is used to organize power supply for a computer with a large number of peripheral devices: Wi-Fi router, printer, multiple monitors, etc.

Advantages
  • Many protective functions
  • 8 standard Euro sockets
  • Good packaging - connection cables, software disk included
  • Automatic fuse
Flaws
  • "Sensitive" power button
  • No LCD display
  • Can't turn off the beep
  • Difficulties connecting software
#3

CyberPower UT450EI

Budget uninterruptible power supply with good functionality

Expert rating:
90
/ 100

The weakest UPS of the models presented in this rating, but also the cheapest. Made in China under a famous American brand.

Specifications:

  • power supply diagram – interactive;
  • switching time – 4 ms;
  • input voltage range – 165-290 V;
  • maximum power – 240 W;
  • battery life – 19 minutes at 60 W, 8 minutes at 90 W;
  • power connectors – 4 computer IEC 320 C13 with backup power;
  • interface – LED indicators, button ON, sound signal;
  • background noise – 40 dB;
  • weight – 3.7 kg.

The model is reliable and functions well if you do not require it to produce more power than the manufacturer indicates. In this case, the device begins to emit a strong high-frequency sound and operate unstably. There is no connection to the computer, which is normal for a device at this price.

Advantages
  • Affordable price
  • Cold start option
  • Switch to battery in 4ms
  • Telephone/network line protection
  • Generator Compatible
Flaws
  • Low power output
  • Computer power connectors
  • No battery replacement possible
  • Smell of plastic during first use
#4

APC by Schneider Electric Back-UPS BX500CI

Interactive UPS for simultaneous connection of three computers

Expert rating:
90
/ 100

The Philippine-assembled model will be a good solution for the office or home. The UPS is designed to serve three low-power personal computers or one medium-performance gaming system.

The equipment is connected directly - for this purpose, the uninterruptible power supply has 3 output power connectors of the IEC 320 C13 type. The model equalizes the output voltage when the network is 160-280 V. When the power goes out, the UPS will automatically switch to the battery, allowing the user to correctly shut down work on the computer.

Specifications:

  • power supply diagram – interactive;
  • switching time – 6 ms;
  • input voltage range – 155-280 V;
  • maximum output power – 300 W;
  • Autonomous operation - no data;
  • number of connectors – 3 computer sockets IEC 320 C13 with redundancy;
  • interface – LED indicators, sound signal, On/Off button;
  • noise – 45 dB;
  • dimensions – 12x19x21 cm;
  • weight – 5.1 kg.

The UPS filters interference and has lightning and surge protection. The device has an automatic fuse - unlike the fusible version, it does not have to be changed during operation.

Advantages
  • Automatic fuse
  • Cold start
  • Many protective functions
  • Periodic battery self-test
  • Clear LED and sound indication
Flaws
  • Only 3 computer power connectors
  • Non-standard battery - difficult to find for replacement
  • No hot swap battery option
  • Monitoring via software is not provided

Double conversion models

#1

CyberPower OLS1000ERT2U

Reliable UPS to protect your critical equipment

Expert rating:
93
/ 100

The high-performance, double-conversion UPS of the Online S series provides protection for critical devices: DVRs, servers, peripheral and network equipment, surveillance systems, emergency power supply and data storage.

The UPS is multifunctional, the module provides protection against overloads, high-voltage pulses and short circuits. The housing is equipped with an LCD information display that shows power status, operation type, faults and warnings.

PowerPanel software is provided for power management, as well as a remote monitoring option. The OLS1000ERT2U UPS is equipped with a bypass for safe switching to the public network - this allows maintenance without shutting down the equipment.

Specifications:

  • type of UPS - double conversion;
  • switching time is instantaneous;
  • input voltage range – 160-300 V;
  • maximum output power – 900 W;
  • Autonomous operation – 5 minutes at maximum load, 15 minutes at half load;
  • number of connectors – 6 computer connectors with backup power;
  • interface – control buttons, LCD display, sound signals;
  • noise – 45 dB;
  • dimensions – 44x9x43 cm;
  • weight – 13.2 kg.

Typical use of CyberPower OLS1000ERT2U: server room, data center, back office. The UPS is not suitable for use at home - users note that the uninterruptible power supply is noisy.

Advantages
  • Zero switching time
  • SNMP/HTTP remote management capability
  • Manual and automatic bypass
  • Information LCD display
  • Cold start and hot battery swap
Flaws
  • High price
  • Noisy operation
  • Small screen size
#2

Powerman Online 1000 Plus

Available uninterruptible power supply with connection of external batteries

Expert rating:
92
/ 100

The Chinese manufacturer's uninterruptible power supply is popular among buyers due to its reasonable cost-to-power ratio. It is usually used for equipment such as gas boilers, although this model can also serve a gaming computer or server.

The price for the Online 1000 Plus model is about 13 thousand rubles. However, we must take into account that the package does not include built-in batteries and the battery will have to be purchased separately.

Specifications:

  • nutrition plan – online;
  • switching time – 0 ms;
  • input voltage range – 115-295 V;
  • maximum power – 800 W;
  • battery life – depends on the capacity of external batteries;
  • number of output connectors – 2 Euro sockets with backup power;
  • interface – LCD screen, indicator lights, power buttons;
  • background noise – 45 dB;
  • weight – 5.6 kg.

Since the total battery capacity can be large (for example, 400 Ah), the period of autonomous operation of connected devices can be significant (6 hours). This will allow the server to be left without human supervision, eliminating prolonged outages in the event of serious power failures.

The lower voltage limit declared by the manufacturer that causes the UPS to switch to battery is 115 V.

Advantages
  • Acceptable cost
  • Large output power - 900 W
  • Informative LCD display
  • Possibility to install UPSILON software
  • There is a bypass mode
Flaws
  • No battery included
  • Uninformative instructions
  • Fan noise
  • Only 2 power output connectors
#3

Ippon Innova G2 3000

High-performance UPS with a full range of equipment protection

Expert rating:
92
/ 100

A powerful and high-tech device is one of the best uninterruptible power supplies for gaming computers and computing stations. The presence of a large number of connectors allows it to be used to simultaneously provide power to up to 8 computers.

Specifications:

  • nutrition plan – online;
  • switching time is instantaneous;
  • input voltage range – 176-300 V;
  • maximum power – 2700 W;
  • battery life - 18 minutes at 800 W, 6.3 minutes at 1.9 kW, 3.8 minutes at 2.7 kW;
  • number of output connectors – 8 computer sockets with backup power;
  • interface – LCD screen, push-button switches;
  • background noise – 49 dB;
  • weight – 22.7 kg.

Significant battery life with connected devices with a power of 0.8-1.5 kW allows you to finish a gaming session or a computing stage in the event of a power outage. Double conversion technology allows you to completely eliminate operational failures due to power surges.

The system is good for working with multiple computers. Its cost is approximately the same as that of 6-8 separate low-power UPSs. But the G2 3000 will have significantly longer battery life and a smaller footprint.

The Ippon Innova G2 3000 model is often chosen for powerful workstations, servers, network equipment and NAS systems.

Advantages
  • High output power - 2700 W
  • Informative LCD display
  • 8 power connectors
  • Full spectrum protection
  • Cold start and automatic bypass
Flaws
  • High price
  • Short cable
  • Small screen size
  • Bulky and heavy
#4

Delta Electronics N-1K

Uninterruptible power supply with the ability to connect additional batteries

Expert rating:
90
/ 100

The 700W double conversion UPS ensures power protection for PCs, telecommunications and medical equipment, security systems, ATMs and vending machines.

The Delta Electronics N-1K model has a wide input voltage range, which allows the device to switch to battery operation less often. The UPS is equipped with three 7 Ah batteries. A special feature of the UPS is the ability to connect additional batteries.

Specifications:

  • type of UPS - double conversion;
  • switching time is instantaneous;
  • input voltage range – 80-280 V;
  • maximum output power – 700 W;
  • Autonomous operation - 5 minutes at maximum load, 14 minutes at half load;
  • number of connectors – 4 computer connectors with backup power;
  • interface – control buttons, LCD screen, sound signals;
  • noise – 40 dB;
  • dimensions – 14x24x37 cm;
  • weight – 14 kg.

The Delta Electronics N-1K features an RS232 port and a Smart-slot for enhanced control and monitoring capabilities.

There are few reviews about the model. Demand for UPS is limited due to its high cost and relatively modest output power of 700 W.

Advantages
  • Cold start and manual by-pass
  • Wide input voltage range
  • Battery deep discharge protection
  • Moderate noise level
  • Additional battery connections
Flaws
  • High price

Differences in power plan

Application uninterruptible power supplies solves several problems - provides the computer with uninterruptible power supply, increases the sinusoidality of current and voltage, cuts off unnecessary harmonics, filters network noise.

The use of a UPS solves several problems - provides the computer with uninterruptible power supply, increases the sinusoidality of current and voltage, cuts off unnecessary harmonics, filters network noise

This has a positive effect on the durability of the system unit’s capacitors, which extends the time of its trouble-free operation.

Electrical impulse graph
Passive filters of modern UPSs include varistors, which filter out surges and switching surges. Often such interference occurs when there are devices in the circuit with large starting currents (+)

For alternating current, there are three types of household UPS:

  • Reserve (off-line). The computer is powered directly from the mains. When the voltage goes beyond the permissible range, it switches to batteries within 6-10 ms. Such uninterruptible power supplies are equipped with the simplest passive filters against impulses and interference.
  • Interactive or line-interactive. Functions similarly to the backup type. There is a voltage stabilizer at the input.
  • Online or double-conversion. The incoming current is converted into direct current and powers the batteries, and from them, through the inverter, the reverse transformation occurs into alternating current, which goes to the output of the device. Therefore, the switching time to battery operation for this type of UPS is zero.

UPS operating on a backup circuit are the cheapest and almost silent. Interactive devices have slightly shorter switching times and are slightly more expensive.Since switching power supplies for computers are not very demanding on the quality of electricity, the use of uninterruptible power supplies of the first two types is acceptable for them.

Online devices are much more expensive. They are used for high-performance stations and file servers with heavy loads. They are characterized by high heat generation and significant noise levels.

Uninterruptable power source
Powerful uninterruptible power supplies make a lot of noise, so they are often placed in closets or utility rooms - closets and non-residential rooms

The efficiency of backup and interactive devices is very high (95-99%). For UPS operating using a double conversion scheme, this parameter is much lower (80-96%), but there are also expensive models with the ability to use intelligent modes, in which the efficiency increases to 98-99%.

What parameters to focus on when choosing a UPS

One of the main characteristics by which you need to choose a UPS is the maximum permissible power of the connected devices. Uninterruptible power supply can be used for a PC (system unit and monitor), router, office equipment, set-top boxes and other devices. The electricity they consume must be summed up.

The power of the UPS is indicated in VA (volt-amperes) or in W. When selecting a device, it is important not to confuse these indicators.

It is best to have a power reserve of 30-40%. Firstly, the computer can be upgraded to increase performance or additional peripherals can be connected to it.

And secondly, the battery life of household batteries (this is the second most important indicator) at maximum load is small and is usually 1-3 minutes.

At a consumption level of 50-70% of the maximum, batteries can power devices for much longer: 6-20 minutes for household models.

UPS with external battery
Some UPSs allow the connection of external batteries. This significantly extends battery life. A low-power computer can work for several hours

The input voltage range determines to what values ​​the uninterruptible power supply will not power the computer from batteries. If the voltage drops frequently, you should not use devices whose lower limit of this interval is greater than 180 V. Otherwise, frequently turning the batteries on and off will lead to a rapid loss of their capacity.

The number of output connectors does not at all guarantee the connection of the corresponding number of computer peripheral devices - the UPS is capable of carrying a certain power. It is always recommended to estimate the total volt-amperes of devices.

Many UPSs have an LCD display and/or a connection to a computer via a USB port. This allows you to program their actions in case of problems with power supply, as well as inform the computer operating system about this.

When placing uninterruptible power supplies in residential or office premises, their noise level is important. Devices operating on a backup power circuit do not emit much heat and do not have coolers, so they are the quietest.

If the UPS is paired with a computer and its fan is working properly, then it produces a sound comparable in power to the noise of the system unit. Sometimes, when overloaded, the uninterruptible power supply can produce high-frequency irritating sounds.

And the last parameter that needs to be taken into account is the weight of the device. Especially if its place will be on the shelves of a computer desk or there are plans to mount the device on the wall.

UPSs are often installed for other household appliances; read more about choosing such devices in the articles:

  1. Uninterruptible power supply for TV: ten best UPS models + valuable tips before purchasing
  2. UPS for gas heating boilers: purpose, review of models, maintenance tips

Conclusions and useful video on the topic

The main reasons for purchasing a UPS:

Connecting a computer and monitor via a UPS. Basic instructions:

Now there are no problems finding an uninterruptible power supply that is suitable for any office and home office equipment or computer. In order for the entire system to function reliably, it is necessary to select a UPS according to the characteristics of the consumers connected to it.

Share with readers your experience in choosing and using an uninterruptible power supply for your computer. Please leave comments, ask questions about the topic of the article and participate in discussions - the feedback form is located below.

Visitor comments
  1. Anatoly

    A very useful thing is an uninterruptible power supply. Saved my computer from power surges many times. The wiring in our house is terrible, there are constant power surges. It’s happened before, I’m doing work and then bam... And that’s it... A lot of nerves and a lot of time down the drain. And my Mustek stopped working. Now I'm searching. I read it and expanded my horizons. Now I will know what to buy.

  2. Oleg

    But I have a worse problem. At home, the old wiring is also capricious, so the uninterruptible power supply generally seems to finish it off. When the computer is connected to the network without it, everything is fine. And if with an uninterruptible power supply, then the wiring doesn’t seem to be able to withstand it, the light starts flashing, or even knocks out the machines altogether. I'm wondering how to fix this. If anyone has had something similar, please share how you got out of the situation?

    • Hyper

      I seriously doubt that an uninterruptible power supply can have such a negative impact on the power grid. I've never encountered anything like this. In any case, such poor wiring must be changed as quickly as possible.

    • Masha

      Hello. The UPS is shorting for some reason. I suspect that the device assembly is left-handed, the wires are connected somewhere or something like that. Try borrowing a working UPS from friends and see if the problem reoccurs.

    • Expert
      Vasily Borutsky
      Expert

      Good afternoon, Oleg.

      I’ll warn you right away - the uninterruptible power supply has built-in protection. What it is - a fuse, a machine - can be found in the passport. If something shorts inside the UPS, the protection will turn it off. At the end of the comment I attached a screenshot “Technical characteristics of Smart-UPS models from APC” - I highlighted in red the line about the presence of protection.

      In principle, Vasily’s proposal to try a guaranteed working neighbor’s UPS is logically correct, but requires “expansion”. Let me explain: the neighbor’s UPS can also start to “fool.” Then take an extension cord and try to turn on the uninterruptible power supply from other outlets (you can even power it from your circuit breaker on the floor panel).

      If the source of trouble is a socket located next to the computer, open it (be sure to first turn off the circuit breakers on the floor panel) and visually assess the condition of the wire insulation and contact surfaces - places where the wire insulation is damaged are usually melted and have a discolored color. Same with contacts. Repairing or replacing the socket is not difficult.

      Attached photos:
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