The best UPS for various applications - device ratings

Rating of uninterruptible power supplies

The VyborExpert team considered both domestic manufacturers and imported brands. All of them showed a high level of demand in the equipment and tools market. The selection of the best models was based on a group of characteristics that determine functionality and quality.

The key criteria when assigning rating positions were:

• Features of equipment and nature of network problems;
• Block type – interactive, backup, with double converter;
• Power level taking into account equipment consumption;
• Battery capacity, battery life;
• Connectors, interfaces, slots;
• Allowable error;
• Control – screen, display, setting buttons;
• Noise level;
• Dimensions – structure size, weight;
• Reliability of the device, build quality, service life, price.

The result of the comparative analysis was a top list consisting of 12 positions. These are 5 online, 4 standby and 3 double conversion UPSs. Not only the opinions of specialists were authoritative, but also customer reviews and their real experience. The latter identified the strengths and weaknesses of the nominees.

Powercom VANGUARD VGS-2000XL

The high-quality VANGUARD VGS-2000XL model is the best UPS from Powercom in the rating. The device is equipped with 6 sockets, each of which is connected to a battery. The efficiency of this device is 92%, and the coefficient of nonlinear distortion is 5%. The device has a power of 1800 W. At half load the device can work for 15 minutes, and at maximum mode – 5 minutes. The charging speed of the batteries is 4 hours, and their “hot” replacement or connection of additional batteries, unfortunately, is not provided. The useful features of an uninterruptible power supply include USB, dry contacts, LCD display, and excellent protection.

Advantages:

• great power
• efficiency
• build quality
• number of sockets
• ease of design

Flaws:

• not the best autonomy

The best interactive uninterruptible power supplies

Interactive devices of this type are in particular demand due to the complexity of the circuit used. Its task is to equalize the voltage during power surges, and not just go into offline mode. This is facilitated by a built-in transformer. The top rating of ChoiceExpert includes 5 such models.

Ippon Back Power Pro II 600

The first nominee is represented by the Russian-Chinese brand “Ippon”. The interactive model is designed to protect a computer or workstation from high-voltage emissions, radio frequency or electromagnetic interference.

The case is compact in size 10×14×29 cm and has a strict black design, with an LCD display mounted on the front panel. It indicates the input/output voltage level, operating mode, load size, and battery charge status.

The front side is equipped with two USB ports, through which you can charge gadgets. On the back panel there are USB type B, C13 power outputs (4 pieces), two RJ-45 sockets. Active power is 360 W, maximum 600 VA. The input voltage stabilization range is 162-290 V.

The cooling system is of a passive type, it has minimal noise of up to 40 dB. The transformer is responsible for stabilization. The 12 W lead-acid battery has a capacity of 7 Ah and is removable. WinPower is a Russian-language monitoring and management utility.

Advantages:

• High power parameter;
• Several USB ports;
• Compactness;
• High quality monitor;
• Autonomy;
• Intuitive controls.

Flaws:

• Only one mode of displaying information on the screen;
• Fixed cable.

The device is valued for its ease of use, noiselessness, and the ability to charge two gadgets at once. Users give high marks for autonomy and information content of a high-quality screen.

APC by Schneider Electric Easy Back-UPS BV1000I-GR

The second position in the rating is occupied by a linear-interactive uninterruptible power supply, the characteristics of which are the highest among all models in the “Easy UPS” segment. Manufacturer: Chinese.

The nominee offers a solution to several problems at once. This protects household appliances from sudden voltage surges, as well as mitigates surges. It is also an additional power reserve in case of an emergency power outage.

The input voltage is 180-240 V with a deviation of no more than 3%, and the output power can reach a maximum of 600 W (1000 VA). A special technology provides protection against high-voltage pulses, which prevents damage to devices in the home/office. For connection there are 4 connectors for a Euro standard CEE 7/4 socket.

Battery power time is 10 minutes. The case is equipped with LED indication to determine the operating mode. Inside there is an autonomy battery with a capacity of 12V/9Ah. Minimum noise level – 40 dB. Dimensions – 30.5×16×9.2 cm with a weight of 5.7 kg.

Advantages:

• Solid design;
• Mobility;
• Quiet operation;
• Ease of Management;
• Compactness;
• Inexpensive.

Flaws:

• No USB;
• Smell of plastic.

This is an affordable, universal solution for equipment safety. Reviews confirm reliability, praise the ability to replace the battery, gentle use technology, which increases service life.

Powercom Raptor RPT-600A Euro

An inexpensive interactive uninterruptible power supply is offered by Taiwan. This is a reliable manufacturer whose models are equipped with modern capabilities, but are much cheaper than their analogues.

The power indicators here are in no way inferior to those proposed by other nominees - 600 VA/360 W. Input voltage ranges from 160 to 275 V. Overload protection is provided to increase reliability and extend service life. Deviations do not exceed 10%.

Autonomy is ensured by a removable battery; its operating time is 13 minutes, which is higher than that of previous products. To understand what mode the device is in, there is a screen with light + sound indication.

The noise filtering option regulates voltage stability and protects electrical appliances from surges and drops. Contents: 3 output connectors for the existing CEE 7/4. The body is made of durable gray plastic. Dimensions 10x14x27.8 cm and weight 4.2 kg.

Advantages:

• Interference filtering;
• Information screen;
• Light and sound indication;
• Good autonomy;
• Removable, replaceable battery;
• Inexpensive.

Flaws:

• Not for a powerful computer;
• LED lamp is too bright.

This position outperforms the previous ones with the ability to replace the battery, fast charging (3 hours), and long battery life. There are complaints about the indicators, the sound is loud, and the light at night can be disturbing.

Energy Guarantor 500

The fourth nominee is Russian.” This is a reliable and proven uninterruptible power supply for a boiler (solid fuel, circular). If the boiler is gas, you need a thyristor stabilizer at the input.

Output power indicators are 500 VA/300 W, input voltage is 155-275 V. A rough relay stabilizer causes an error of up to 8%. You can connect only one device to the device; for this there is a special connector for a CEE 7 European socket.

There is a By-Pass mode, there is overload protection, this extends the service life. This model does not include a battery; you will definitely need to purchase one (from 45 to 100 Ah).

All information about the battery status can be obtained on the LCD display. There is not only light, but also sound indication. The case is made of durable black plastic, its dimensions are 14x17x34 cm and it weighs 5.2 kg.

Advantages:

• By-Pass mode;
• Overload protection;
• Informative display;
• Operating mode indication;
• Compactness;
• Long service life.

Flaws:

• Requires the purchase of a battery;
• Only one connector.

Most often, this device is used in tandem with heating systems to prevent failure. Users call him one of the quietest among “his own kind.”

Bastion Teplocom-100+

This nominee is intended to maintain stable power supply to heating systems, be it electric drives, circulation pumps, electric valves and other equipment with a power of 100 VA.

Voltage and power parameters – 100 VA, 220V. Automatic switching to energy consumption instead of the mains from the IBS is carried out instantly - after 1 second, and back - after 15 seconds. Therefore, this is the fastest and most reliable option.

If the network fails, the device automatically switches to battery backup power. The snow-white metal-plastic case allows for the installation of a battery with a capacity of 12 Ah inside or up to 65 Ah outside. The dimensions of the structure are 17.5×11×22.5 mm with weight.

The main difference between the nominee is the wall-mounted installation method. There is no informative display, but there is an indication of operating modes, a protective system against overloads, and against deep battery discharge.

Advantages:

• Reliable assembly;
• Cold start mode;
• Quick transition to backup power;
• Possibility to connect the battery externally;
• Wall mount;
• Overload and discharge protection.

Flaws:

• The battery needs to be purchased;
• Not for PC.

Buyers appreciated the product for its design, ease of location, ease of operation and reliability. In addition, there is the possibility of additionally connecting another external battery.

The best UPS manufacturers according to reviews

If you have not encountered such devices before, then first of all you need to figure out which UPS company to choose. There are no well-known brands here for many buyers, so in the store the user can easily get confused by unfamiliar names. To easily select a high-quality device, you should rely on expert and user assessments of the UPS.

So professionals highly recommend the APC by Schneider Electric . Its products are of excellent quality and reliability, but in this case you should not count on a low price. The best company producing uninterruptible power supplies in terms of price and quality ratio is called Powercom . At a reasonable cost, devices from this brand are distinguished by excellent capabilities and durability.

An excellent alternative to Powercom is the EATON . The model line of this brand is even more extensive than that of the companies presented above, and the quality of all the manufacturer’s products deserves the highest praise. If you need to save even more, but you don’t want to sacrifice quality, then inexpensive and high-quality uninterruptible power supplies from the Ippon .

The best backup uninterruptible power supplies

Models of uninterruptible power supply UPS backup type (Back-UPS, Standby, Off-line) are distinguished by the simplest design. The “filling” is electronic; in the moment of a network crisis, it automatically switches to autonomous power supply for household appliances. Such modifications are suitable for computer, audio, and video equipment, but with a large power reserve, although more often these are cases of minor power surges.

Spider SPD-1000N

"Spider SPD-1000N" is a reliable and compact UPS that supports electrical equipment in the event of a power outage. Its autonomy will be enough to correctly save important data until deactivation.

The output power here is much higher than that of previous nominees - 1000 VA. Thanks to this characteristic, it can serve equipment with a high level of energy consumption. Stability parameter – 220-240 W. The error does not exceed 5%.

To extend the operational life of the devices, protection systems have been introduced - against overload, short circuit, and input voltage filtering. If there is a power outage, the built-in 12V/9Ah battery will keep the devices on for another 6 minutes.

The case measures 23x28.5x10 cm and weighs 4.47 kg and has 8 Euro sockets, 4 of which are battery operated. This allows you to maintain the stability of several devices at once.

Advantages:

• High performance;
• Lots of connectors;
• Protective systems;
• LED indication;
• Bypass technology;
• Inexpensive.

Flaws:

• Only 4 battery outlets;
• Short wire.

To increase efficiency and save energy consumption, the model is supplemented with Bypass protective technology. When active, it is practically inaudible. Installation is possible both on the floor and on the wall.

WOW-300

This nominee is represented by the already announced Taiwanese. This compact device is a USB uninterruptible power supply in the form of a carrying case with sockets, which is based on digital microprocessor control.

The functionality differs from previous nominees. The automatic frequency detection option is used here. The device also performs self-diagnosis and regulates battery conditions. The battery capacity is 6V/4.5Ah, this is enough for 4 minutes of autonomous power supply.

To extend the service life, a short circuit/overvoltage protection system has been introduced, as well as a special filter that removes radio interference and electromagnetic radiation. Full operation is possible with an input voltage in the range of 195-265 V, with an output power of 300 VA.

The case has dimensions of 31.5x6x10 cm and weighs only 1.9 kg. There are connectors for connecting USB and RS232, there are 3 of them in total. The operating mode will be indicated by a light indication.

Advantages:

• AVR microprocessor;
• Compactness;
• Floor, wall installation;
• USB charging;
• Protective systems;
• Inexpensive.

Flaws:

• Performance;
• A few nests.

This is a budget model that will support equipment only during short-term network outages. 2 of the 3 sockets presented are battery operated, this is important to take into account. Operation is simple and comfortable due to its light weight and long cord.

Back Verso 800 New

All “Back Verso” modifications from the previously presented ones are suitable for maintaining stable functioning of PCs, monitors, and various peripheral computer equipment.

Power indicators in this case are 800 VA/420 V, input voltage 170-270 V. The error does not exceed 10%. The design includes 6 European standard sockets, 4 provide uninterrupted power. One of them is RJ-45, which prevents overload of the telephone line.

Connected devices are not afraid of high-voltage pulses, short circuits, or interference. This condition is indicated by light + sound indication. Battery life 1.5 minutes. Battery capacity 12V/7Ah.

The dimensions of the structure are 33.5×17×92.5 cm with a weight of 3.8 kg. The shell protection degree is IP20, it extends the service life. The controls are intuitive, there is only one on/off button.

Advantages:

• Network protection, including telephone;
• Compactness;
• Light + sound indication;
• Lots of slots;
• Performance;
• Good indicator of security.

Flaws:

• 4 battery sockets;
• Outdated design.

This is one of the most popular uninterruptible power supplies for computers and other home equipment. The system of sound and LED notifications requires an understanding of what color and sound communicates what.

Eaton 3S450D

The fourth nominee in this category offers affordable, reliable protection for both home and office equipment from problems with power grid instability. This is a new second generation Off-line UPS with 6 Schuko sockets.

Let's start the review with the main indicator - the output power, which in this case is 450 VA/270 W. To extend service life, the housing is protected against overvoltage according to IEC 61643-11. In case of emergency, an emergency shutdown will occur.

The control elements are LED indicators, supplemented by sound signals. The instructions describe how to recognize them correctly. Another important feature of the nominee is the presence of a USB interface. The Leoch DJW 12-4.5X battery capacity is enough to work after a power outage from 2 to 6.5 minutes.

The body is made in black and white with a glossy finish. Its dimensions are 14x32.5x8.6 cm and weighs only 2.9 kg. Another difference from other products is the low noise level of 25 dB. Number of output connectors – 6 pieces, type CEE 7.

Advantages:

• Stylish design;
• USB interface;
• 6 sockets;
• Very quiet operation;
• Horizontal orientation;
• Price.

Flaws:

• 3 sockets are battery powered only;
• Performance.

The connectors are located along the body in two rows, which is very convenient for simultaneously connecting several devices without physical interference. Installation method: horizontal on the table, under it, within the workspace.

Ippon Back Basic 1050 IEC

The Back Basic 1050 IEC model from Ippon is an excellent on-line uninterruptible power supply. The power of this device is 600 W, and its noise level is a comfortable 40 dB. The device is equipped with 3 sockets, each of which is connected to a battery. The batteries in the Back Basic 1050 IEC can be replaced or recharged in 6 hours. The device has an automatic fuse, a noise filter, as well as protection against overloads and short circuits. Among the useful functions, the model from Ippon includes an audible alarm, as well as the possibility of a cold start.

Advantages:

• battery life
• battery charging speed
• easy battery replacement
• variety of protective functions
• high build quality

Flaws:

• not available for the price

Best Double Conversion Uninterruptible Power Supplies

Double conversion (“online”) UPSs provide better quality of network supply. Here the battery is constantly working, excluding voltage dips when switching to reserve. Multitasking consists of rectifying the incoming current, reducing the voltage to the optimal value. Such rechargeable uninterruptible power supplies will cost more due to the stability of operation in the presence of any interference.

Ippon Innova G2 1000

The first double conversion UPS is represented by the already announced Russian brand “Ippon”. But unlike previous nominees, this one guarantees the highest degree of protection against malfunctions.

The power source is the output voltage generator. An even constant reading from the rectifier follows to the charged battery and to the output to the inverter. If the power goes out, the inverter carries out tasks using battery power. The permissible input voltage is 100-300V.

The power rating of this device is 900 kW/1000 VA. In this case, the error does not exceed 1%. Two batteries with a capacity of 12V/9Ah are mounted inside the structure. This is enough for the equipment to work without electricity for 3.5 minutes.

Case dimensions – 14.4×22.8×35.6 cm with a weight of 10 kg. As for the interfaces, there is a slot for connecting to a PC RS232, USB, EPO contacts, a slot for SNMP/AS400 expansion cards, an IEC C14 output and an IEC C13 input (4 pieces).

Advantages:

• Level voltage with double conversion;
• Active cooling;
• Sound notification;
• Connecting an SNMP card;
• Instant switching to battery operation;
• Informative LCD display.

Flaws:

• Perceptible heat generation;
• Constantly running fan.

This model is reliable, productive, and easy to use. It is important to consider that there is no way to turn off the fans, which is accompanied by a characteristic sound. Heat dissipation is a disadvantage of all double conversion devices.

FSP Group Knight Pro+ TW 1K IEC

The second in this review category is a Taiwanese-made nominee with two batteries and a USB interface. Microprocessor control is responsible for reliable operation.

The device protects equipment from overload. The total output power is 1000 VA/900 W, while the permissible parameters of single-phase voltage at the input are 120-300 V. An LCD screen with LED and sound indication will notify about everything that happens.

The error does not exceed 1%. Noise level 50 dB. Among the functionality, it is worth noting the automatic Bypass mode, “cold start”, and the ability to replace the battery.

The dimensions of the structure are 28x14.5x22 cm with a weight of 9 kg. The list of proposed interfaces is RS-232, USB, Ethernet 10/100, computer IEC 320 C13. The model also supports SNMP expansion cards.

Advantages:

• High-quality assembly;
• Good batteries;
• Cooling;
• Bypass mode;
• Information screen;
• Current interfaces.

Flaws:

• Noise;
• Instructions in English.

Most often, such a device is used in several areas of banking, ATMs, office buildings, where it is extremely important to maintain the constant functioning of the equipment.

CyberPower OLS2000EC

The review ends with a universal device for home/commercial use. Manufacturer: American. This is one of the most effective solutions when budget is limited.

This nominee is the immediate leader due to the high output power - 2000 VA/1600 W. In this case, the input voltage parameter specified in the instructions is 160-300 V.

The device does not allow failure due to overheating, overload, or voltage surges. The battery capacity here is 12V/7Ah, the design is equipped with 4 such power sources at once.

Among the interfaces, the manufacturer has introduced a computer input IEC 320 C13 (6 pieces), RS-232, USB. The noise level does not exceed 45 dB. Dimensions 39.4x15x22.5 cm, weight 14 kg. Additionally, there is a bypass mode, LED indicators, and an energy-saving ECO mode.

Advantages:

• High power parameter;
• Protection of batteries from premature failure;
• Energy saving mode;
• Generator compatible;
• Quality of components;
• Price.

Flaws:

• Low autonomy;
• Control/monitoring from PC.

The creators did not skimp on the quality of the assembly and components. The budget price is due to the modest battery capacity and basic display capabilities. To set up such a device you will need a computer.

Powercom Imperial IMP-825AP

An excellent uninterruptible power supply with five outlets is presented by a solution from the Powercom brand. The Imperial IMP-825AP model has everything that can be seen in a budget device. The device boasts a power of 495 W and switches to battery in just 4 milliseconds. Of the 5 UPS outlets, 3 are connected to batteries. It will take 6 hours to charge the latter. However, batteries can also be changed, and this procedure is allowed even in “hot” mode. The uninterruptible power supply has all the necessary protective functions: against interference, short circuit, overload, high-current pulses, etc. The model from Powercom also has an audible alarm, a USB connector, a cold start function, and LED indication.

Advantages:

• work stability
• effective protection
• Energy consumption
• high power
• excellent autonomy

Flaws:

• for the price no

How to choose an uninterruptible power supply

After getting acquainted with the presented nominees, all that remains is to decide which one to buy. We recommend defining the operating conditions in advance, comparing several characteristics with them - device type, power, presence of power connectors, battery life.

Device type

Uninterruptible power supplies may differ in the operating mechanism, design and principle of operation. The most in demand are 3 types of uninterruptible power supplies:

• backup models are the most inexpensive models, which are appropriate in conditions of rare power outages; they will withstand no more than 5-10 minutes of operation before discharge;
• interactive - or linear-interactive (Smart Ups) with an AVR stabilizer, it turns off only when the voltage deviation is high;
• double conversion - expensive “online” UPSs that provide the best quality of power supply without the risk of voltage failure even when switching to backup power.

The first option is universal; it will cope with minor power surges, but it is more of an uninterruptible power supply for the home. The second is optimal for home/office use. The third gives stable performance in any conditions.

Power

The manufacturer indicates this characteristic in units of measurement “VA”. This is the maximum total power produced by the equipment connected to the device. Using current clamps and a multimeter, you can determine this parameter for different equipment used at maximum load.

Power connectors

Another important selection parameter is the number and types of connectors on the UPS case. It is important to consider how many devices will be used. Most often, manufacturers use the following interfaces and slots:

• standard socket for household appliances;
• battery powered socket;
• a slot through which you can control a PC;
• slot for connecting telephone and network lines;
• socket connecting the UPS to the mains;
• special connectors for self-diagnosis and monitoring (COM, USB).

The most expensive modifications are those that include all of the listed slots at once. This means that the list of situations where they will be useful is extensive.

Battery life

The third determining factor for the buyer is battery life. A lot here depends on the type of battery, its capacity, and the total power of the connected consumer devices. The number must be written in the instructions. With rapid discharge, in 5-10 minutes the battery is capable of delivering 20-30% of the installed nominal capacity.

UPS power

The output power of an uninterruptible power supply is measured in VA. This indicator indicates the maximum total power of the connected equipment. It is this that is often critical when choosing a UPS.

It is worth considering that the value in watts indicated in the instructions for the equipment is the active power of the device. Many devices also have reactive power, which should be taken into account when selecting an uninterruptible power supply.

Most often, a UPS is purchased to connect a PC. Its power can be determined using measurements. The safest way to do this is to use a current clamp; using a multimeter can lead to electric shock. The measurement should be carried out at maximum load on the processor and video card. The result obtained should be multiplied by the network voltage. In this case, we obtain the required total power in VA.

A cruder but simpler method is to divide the maximum power of the power supply (indicated in Watts) by the power factor. The real indicator of the computer will be lower, but not higher.

Which uninterruptible power supply is better?

Still haven't decided what to buy from the list presented? Vyborexperta.ru does not give an unambiguous recommendation on what to choose. But a comparative analysis of advantages and weaknesses highlights the brightest representatives of the rating:

• Ippon Back Power Pro II 600 – a compact and budget interactive unit with USB and the ability to charge gadgets;
• Powercom Raptor RPT-600A Euro – the longest battery life, removable, replaceable battery and informative screen;
• Bastion Teplocom-100+ is the best solution for maintaining the stability of heat supply systems;
• Spider SPD-1000N – case with the largest number of connectors, Bypass mode;
• Back Verso 800 New – the best solution for protecting the telephone network, speed and different slots;
• WOW-300 – automated AVR functioning system, different installation methods;
• CyberPower OLS2000EC is the review leader in terms of functionality and endurance, 4 power sources at once, energy-saving ECO mode.

For home use, with frequent network outages and fairly stable voltage, backup modifications are appropriate. If you need protection from frequent power surges, linear-interactive devices can cope with this problem by leveling out the surges. On-line UPSs can protect important servers and systems without shutting down.

P-Com Pro 1H

Next up is an excellent UPS for a gas boiler with an attractive price. The power of P-Com Pro 1H is 800 W, and its efficiency is 86%. There are 3 power connectors in this device and they are all connected to the battery. Among the useful additions, the device contains an information display, as well as an RS-232 interface. The P-Com UPS supports additional batteries and has a cold start function. In addition, the Pro 1H model boasts a full range of protective functions, including a LAN security system, noise filter, fuse, and overload and short circuit prevention.

Advantages:

• protective functions
• support for additional batteries
• convenient LCD display
• thoughtful design small dimensions

Flaws:

• no dry contacts
• high noise level

Ippon Innova RT 1000

The model is intended for home and industrial use. It makes sense to purchase it for a server room where work is carried out on the Noveli, Windows NT, Unis and other platforms. The device itself is equipped with a high-quality and durable case, which is reliable and has a well-thought-out security system. The front panel contains an LCD display and a control unit of mechanical buttons. The screen displays data on the output load power, battery charge level and current operating mode. The buttons will help you configure the device for the required operating mode. The model supports double conversion technology of electric current, can make the current constant, and also produces alternating current in stable sinusoids. If the power suddenly goes out, the UPS will be able to use charge from its own battery for 15-20 minutes.

Pros:

1. High quality build and materials;
2. Provides stable output voltage;
3. Supports the ability to connect an additional battery;
4. Informative LCD display;
5. Can use its own batteries during a power outage;
6. Reliability and safety of use.

Minuses:

1. Noisy fan.

Powercom WOW-850U

Convenient in size and light weight, the UPS has one control button and operation indicator lights. Four sockets are presented in the “euro” format, where each has a mechanism to prevent any small debris from getting inside. The case itself is made of molded plastic, which significantly increases its strength and the device can withstand mild mechanical shocks. The device can be mounted on the wall, as there is a hole in the case for this. The UPS is installed on the floor using plastic feet. The battery capacity is 13 W/h, and the operating voltage is 12 V. The uninterruptible power supply emits a sound signal when switching to battery power. This occurs when the input voltage drops below 165 V.

Pros:

1. Small size and weight;
2. Affordable price;
3. Durable housing and the ability to mount the device on a wall;
4. Quiet operation;
5. There is protection against debris getting inside the socket.

Minuses:

1. A short period of time during a power outage.

How to connect to a computer?

It is important not only to choose a high-quality uninterruptible power supply, but also to connect it correctly. To do this, perform the following actions:

1. Plug it into the network to charge the battery. After this, turn off the computer. Next, connect the surge protector for the printer and scanner to the electrical network, because It is not recommended to power them from UPS.
2. Connect the protected devices to the UPS. The computer plug is inserted into the uninterruptible power supply socket, then the monitor and modem are connected.

These are all necessary manipulations. This changes the sequence of turning on the computer - it is turned on only after the UPS starts.