Inverter (UPS) + battery kits for backup power supply systems for boilers, pumps and other life support systems of your home

Content

• Which UPS to choose for your home: single-phase or three-phase?
• Kits with high-capacity external batteries 5 kW - is it a lot or a little?
• Three phase kits. Power 3/5 kW per phase

Determining the Best Energy Source

Choosing an alternative energy source for autonomous power supply to a residential building is a very important and responsible moment that requires a serious approach.

The most popular and most common options include:

• generators running on diesel fuel or gasoline;
• solar panels;
• batteries of large volume and power;
• hydroelectric systems;
• wind energy converters.

Each source has its own unique characteristics and features. Owners should familiarize themselves with them in advance and, based on this information, determine the best option for a system that can satisfy all the electrical needs of a private residential building.

First of all, let's decide: do you need a single-phase or three-phase UPS for your home?!

If the input (input) is single-phase, then the uninterruptible power supply must also be selected as single-phase.
The question arises if the input is three-phase. It would be a mistake to answer unequivocally that three-phase is needed. You, dear Buyer, will overpay for the device itself (three-phase units are more expensive), overpay for installation (installation is also more expensive) and will receive a fault-untolerant system, which will also cause trouble in operation in the future.

Reason: UPS 3/3 monitors the presence of voltage in all three phases; in the event of an accident in one phase and the battery energy is exhausted, all three are de-energized. If one of the phases is overloaded, all others are also switched off. Well, in the event of a breakdown or planned maintenance, all consumers in the house are left without protection. Three-phase systems use one battery bank and this is the only plus.

Conclusion: A simple, reliable, fault-tolerant system can be made from three single-phase UPSs. But in this case you will have to make three battery banks; to save money, they can be made different. But there is more of a responsible load, less of a less necessary one.

Exception: If there are three-phase consumers in the house, then a three-phase UPS must be used, or they must be excluded from the uninterruptible power supply circuit. As a rule, the main three-phase consumers are an oven and an electrically heated sauna. It is common sense to refuse to bake a turkey in the oven during an accident at a substation and not to sit in a sauna.

Three-phase circuits are used in production - for CNC machines, laser cutters, in laboratories for precision instruments, in medicine - for diagnostic equipment (tomographs, cardiographs, MRI).

In private houses, if the previously listed devices are not installed in them, THREE-PHASE UPS IS NOT NEEDED!

Advantages and disadvantages of autonomous home power supply systems

In order, as they say, to outline the horizons of the opportunities provided, but on the other hand, to somewhat “ground down” the overly rosy, “projector” moods, it makes sense to first briefly familiarize yourself with the general advantages and disadvantages of autonomous power supply systems at home.

So, the following speaks in favor of

• Provided that the correct professional calculations are carried out, the project is competently drawn up and its high-quality implementation, the owners of a country house will no longer have to deal with the “whims” of local electrical networks. This refers to cases of sudden loss of voltage or strong surges that threaten to damage household appliances or tools. A well-functioning system works like clockwork, and home appliances are safe.

Accidents on power lines, power surges and other troubles - the owner of an autonomous power plant is insured against all this.

• Problems with possible power limits for connecting to networks and volumes of energy consumption go away. Accordingly - and with payment at established tariffs. The owner is free to equip his device with any devices within the operational capabilities of his energy system, that is, to create any level of comfort.
• Equipment used to generate electricity, as a rule, has an impressive margin of reliability and rarely fails. Naturally, with its correct operation and regular maintenance.
• If you think big and take into account the experience of using home power plants in Western European countries, you can not only fully satisfy your own electricity needs, but also sell its surplus. For this purpose, there are special programs for interaction with companies in the energy sector. Naturally, such an approach would speed up the return on costs and even turn our own “power unit” into a profitable endeavor.

The “green tariff” system, when the owner of a power plant begins to sell excess generated energy to the state, will certainly be of interest to many.
True, to reach such a level requires not only the implementation of a carefully thought-out project with very significant start-up costs, but also the passage of a number of bureaucratic procedures and technical examinations. Nevertheless, such a direction in the “private power industry” certainly has considerable potential for future development.

Now let’s take a closer look at the shortcomings of an autonomous power supply system.

Tired, lazy, very cold, then - no excuses are accepted, no one will restore the system’s functionality for you.

• It has been said more than once, but - we repeat, the starting investments both for the development of the project and for the acquisition of the necessary set of equipment, its installation and debugging, can be very impressive. And the operating costs can be considerable. And it would be wrong to expect a quick payback.
• All risks, including material ones, are borne by the potential owner of the power plant. This once again shows how carefully the project should be thought out and worked out.
• The owners bear full responsibility for the operation of the equipment, its timely maintenance, appropriate care, and compliance with all safety requirements. If the system fails and the house is left without electricity, there is no one and no need to complain. More precisely, no one bothers you to seek technical support from specialists - but this will be exclusively at your own expense.

• Carrying out regular preventive measures (and without this there is no way) will also require additional costs, since their implementation requires a professional approach. The situation can be aggravated by the fact that houses with an autonomous power plant are quite often located at a considerable distance from large centers. That is, you will have to bear the transportation costs to call specialists.

So, anyone who has the idea of ​​​​transferring their possessions exclusively to an autonomous power supply should think through everything ten times, calculate, weigh everything “pro & contra” before starting to invest in the implementation of such a large-scale project. And don’t expect immediate benefits - the payback can take 10 years or more. And this despite the fact that the equipment itself also has some, albeit considerable, but still limited service life.

In addition to those listed, types of generating equipment different in operating principle also have their own advantages and disadvantages - they will be discussed in the relevant subsections of the publication.

What energy sources can be used for autonomous power supply?

Here the division into two groups is quite obvious.

• The first includes electric generators that have a power drive and use one of the types of fuel as a source of external energy - liquid (gasoline or diesel fuel) or natural gas.
• The second group includes generator sets that are powered by completely free, natural energy sources. Wind generators, solar panels and hydraulic systems fit this definition.

Now let’s take a closer look at these sources of electricity.

UPS for home. Kits with high-capacity external batteries

• UPS kit for home HPS30 5kW +4 batteries 100ah each + cabinet

• UPS kit Hiden HS20-5048 5kW+4*100ah+cabinet

• for home Stark 5000 INV with 4x100Ah battery

• UPS 5000W On-Line + 4x100Ah Leoch.

5 kW - is it a lot or a little?

When choosing the kit you need, consider:

1. The UPS is placed in a break in the power supply circuit of the entire house and in the “operation from the network” mode it will be loaded in total by all the switched on load, and its power must withstand it! Otherwise, everything that you can turn on at the same time (don’t forget about the lawn mower, electric grill and hammer drill) will all be connected to the UPS. Obviously, in the event of a power failure, unnecessary devices will not be used, but the rest of the time, large currents will flow through it. Therefore, with a single-phase connection, the choice of 5-6 kW is needed primarily for operation in normal mode, and in the “battery power” mode, 500-1500 W will actually be used for the really necessary equipment (boiler, refrigerator, pump). And powerful low-frequency UPSs cope with this task perfectly.
2. There is no need to count on long-term autonomous operation from the backup power system of electric heaters, water heaters, and air conditioners. This is a waste of money - operating a 3 kW heating element from batteries for 1 hour will cost 400 Ah (four 100 Ah batteries). A generator can handle this task better and cheaper.

Three phase kits. Power 3/5 kW per phase

• three-phase UPS kit for home 9kW 3*3kWt+6 batteries 100ah each

If you take a flexible approach to solving the problem of uninterruptible power supply, you can significantly reduce the cost. And at the same time increase the reliability and degree of protection of equipment. This requires knowing where everything is turned on in the house and in what phase the boiler, pumps, sockets and lighting “hang”. If such information is available and it is reliable, then we suggest using not identical UPSs in terms of power, but different ones, combining power consumers into groups:

• The first group, the most important, is heating. Gas boiler with circulation pumps, gas valve and all control electronics. Typically, the power of this system is no more than 500 W, and the requirements for power supply quality are increased. Gas boilers cannot tolerate voltage surges and to protect them, they need On-Line class devices with a power of up to 900 W, but double conversion, which will provide 100% protection against voltage surges, plus two batteries with a capacity of 50 to 100 Ah. Thus, the boiler will have its own battery bank, which will not be used by any other electrical consumer in the house. View optimal solutions for powering and protecting heating boilers.
• The second group, borehole pumps, drainage pumps, refrigerators, microwave ovens, coffee machines, everything that turns on occasionally, but at the same time has high starting currents. For this group you need to install the most powerful UPS (3-6 kW), with a battery of at least 100 Ah. Here, battery capacity is limited only by budget.
• The third group is light. The opportunity to save money comes from using LED lamps. With a total possible power of 1000 W, a powerful inverter is not needed, and the battery is sufficient for up to 100 Ah.

Thus, all three groups will have different batteries, different UPS power, and an accurate calculation will save up to 40-50% compared to the kits above!

What is the difference between a UPS for home and a UPS not for home?

When calculating and selecting an uninterruptible power supply system, for example, for a server, the power and the fact that the equipment consumes the declared power around the clock are clearly known. The calculation of autonomy turns out to be accurate. In the case of a country house, everything is much more complicated:

• First of all, the different nature of the loads . In a country house there are also powerful consumers, such as a borehole (submersible) pump, a dishwasher, a washing machine, an electric oven in a stove, microwaves and kettles, lawn mowers and other electrical tools. At the same time, they have and operate low-power equipment, which is most sensitive to voltage drops.
• Uneven distribution of power consumption. high simultaneous switching ratio . What does it mean? Let’s assume a situation where at night only the heating circulation pump works in the house and sometimes the refrigerator turns on, the result is approximately 45-200 Watts. And in the evening, for example, December 31st. Everything works: the pump pumps water, turns on for 3-5 minutes, this is 600-1000 W, in the stove - the grilled turkey “eats” 1.5 kW, the kettle is microwave, and the machine also washes and the ladies actively use a hairdryer (another + 1200 W) . Plus lighting, a 400 W vacuum cleaner (should be clean by the New Year). In total, once a year there is a simultaneous switching on of 6-9 kW of mixed load. The power of the system must be designed for this peak moment, otherwise you will have to celebrate the holiday in the dark by candlelight.

In summary: the main differences in the requirements for home UPSs are:

• High overload capacity (large power reserve). This important parameter depends on the type of inverter. An inverter (converter) is the part of the UPS that is responsible for converting the voltage from the batteries to 220 volts. LF - allow a double overload within 2-5 seconds, for HF overload is unacceptable, especially sharp, such as borehole pumps give to the network.
• Economical. Working 24 hours and 365 days a year, an uninterruptible power supply for a home should consume a minimum amount of energy; let’s calculate: on average, a 10 kVA ON-Line system takes on 60 W in normal mode. Without taking into account recharging the batteries, we will assume that the batteries are fully charged. We multiply, 60W*24*365=525600 W or 525 kW of electricity. Which, translated into money, equals 2500-3500 Rubles. It is desirable to have an IVF mode.
• The output signal shape is sine. Because The powered load contains pumps (inductance). Learn more about output waveforms.

Time for autonomy. Three optimal options:

• If there is a generator with automatic self-starting, the battery life is considered to be equal to the time it takes to start the generator plus 2-3 minutes for stabilization of the rotation speed and voltage. Usually 5-10 minutes. This time is provided by powerful 6-10 kVA UPSs with internal batteries. They will perfectly compensate for the voltage dip when switching to power from the generator and will not allow sudden surges and impulse noise during switching.
• If you have a generator without autostart, the requirement for battery life increases and amounts to 1-3 hours. Only UPSs with external batteries of medium capacity can cope with this task.
• If there is no generator, backup power systems with external batteries, but of large capacity, are installed.

The battery life depends on the capacity of the connected batteries.

It is impossible to accurately calculate the time during which the uninterruptible power supply will provide power to the connected load, because In the house, the main power-hungry consumers work sporadically, and it is impossible to predict whether at the time of a power outage the washing machine will work in heating mode or in spin mode or will not work at all. Usually, and this is correct, only those consumers are taken into account that operate without human intervention: a heating boiler, a well and drainage pump, a refrigerator, emergency lighting and a video surveillance system. The most basic mistake of a buyer of a UPS for his home: not taking into account the mode when the uninterruptible power supply operates from the network and powers all consumers through itself.

In order not to delve into the above technical details, send us a request-specification specification, we will select the equipment for you.

How to choose for an apartment, house, cottage?

Choosing a suitable autonomous power supply at home is not so difficult if you take into account some parameters.

The first thing you need to rely on is the number and nature of systems that consume energy. Typically, the list of such systems includes air conditioning, heating, and pumping water supply from a well. It is also necessary to take into account the number of frequently used household electrical appliances and refrigeration equipment. All of the above requires uninterrupted power supply, which can be provided by any independent source.

The second stage of selection will be the calculation of the total power. The consumption indicators of each device are added together. The final autonomous power supply for a country house, cottage or apartment should exceed the received amount by 20-30%.

The type of system being planned is also influenced by the role assigned to it: full supply or backup power. Not all sources can supply recycled electricity for a long time without depending on external factors.

The allocated budget will determine the high cost of the system, its manufacturer, or give rise to the idea of ​​making it yourself.

With fuel-free generators, you will have to pay attention to the surrounding landscape and climate. The ideal option is to choose two alternative recharges of different types at once

Then there will be a safety net for all occasions. Experts advise keeping a generator running on combustible fuel (with a supply of fuel itself) and one of the inverters that absorb the natural forces of wind, sun, water or steam. The separate use of batteries is rarely practiced due to the quickly consumed resource and the impossibility of recharging without direct electricity. However, as another backup option, this is quite suitable for an apartment or private house with a centralized network

The ideal option is to choose two alternative feeds of different types at once. Then there will be a safety net for all occasions. Experts advise keeping a generator running on combustible fuel (with a supply of fuel itself) and one of the inverters that absorb the natural forces of wind, sun, water or steam. The separate use of batteries is rarely practiced due to the quickly consumed resource and the impossibility of recharging without direct electricity. However, as another backup option, this is quite suitable for an apartment or private house with a centralized network.

Detailed story about the finished kit

The cost of a UPS with battery in various configurations for a country house is given below:

Single-phase OFF-Line class UPSs with external batteries and powerful chargers

• Hiden Control HS20-5048P (48V, 5000W)

  Power 5 kW. Off-Line UPS, without battery. With SB controller.

• Hiden Control HPS30-6048 (6000 W)

  Power 6000 W. Off-Line UPS with battery charging current of 50 Amps.

• Hiden Control HPS30-3024 (TOR) 3000 W

  Power 3000 W. Off-Line UPS with battery charging current of 45 Amps.

• Stark Country 5000 INV

  Power 5000 W. Off-Line. There is no battery. SB controller.

Explanation of the choice of model: the fundamental difference between HF and LF?

• Stark Country 5000 INV and Hiden Control HS20-5048P are lightweight, HF models (high efficiency), with the ability to connect solar panels. They have low overload capacity.
• The Hiden Control HPS30-6048 and 3024 models are low-frequency, powerful, and can be pushed to their limits. In terms of efficiency (or self-consumption) they are inferior to high-frequency ones, but gain in reliability and fault tolerance under overloads.
• General advantages: work with a small number of batteries. Powerful memory. Capacity of connected batteries is up to 600 A/h.

The power of the UPS listed below is from 5 to 9 kW. If this is your first time trying to figure it out and choose a UPS, then please note that VA - volt amperes, are different from W - watts. It is customary to indicate the power in VA in model names, but in the house for which we are selecting a UPS, half of the load is clearly inductive (pumps, electric drives) and it is necessary to take into account the “cosine Phi” of 0.7. In addition, do not forget about inrush currents.

Single-phase ON-Line class UPSs with internal batteries for a period of 5-10-15 minutes, as a buffer between the generator

• Calm ST1110SL

  Power 8000 W. On-Line. Battery 16x9Ah. Pure sine.

• Calm ST1106SL

  Power 5400 W. On-Line. Battery 16x9Ah. Pure sine.

• UPS 10 kVA (9 kW) L900Pro-S 10kVa Lanches

  Power 9000 W. On-Line. Pure sine.

• Lanches L900Pro-S 6kVa

  Power 5400 W. On-Line. Pure sine.

Single-phase UPSs with internal batteries have advantages in compactness (size). Everything is located in one “rack/tower”. As a rule, the autonomy time is 5-15 minutes, depending on the load. The autonomy time cannot be increased. Such UPSs are designed to protect against dips (surges) and short-term power outages, successfully compensate for temporary power outages when switching to power from a backup generator and eliminate surges in voltage amplitude when switching back.

Single-phase ON-Line class UPSs with external batteries for a period of 15 minutes or more, as an autonomous power source

• UPS 10 kVA (9 kW) L900II – H 10kVA Lanches

  Power 9000 W. Without battery. On-Line. Pure sine.

• UPS 6 kVA (5.4 kW) L900II-H 6kVA Lanches

  Power 5400 W. On-Line. There is no battery. Pure sine.

• Stark Country 6000 Online 12A

  Power 4800 W. On-Line. There is no battery. Pure sine. Charge current 12A

• Stark Country 10000 Online

  Power 8000 W. On-Line. There is no battery. Pure sine.

Single-phase UPS for working with external batteries. It is necessary to calculate, purchase, and install external batteries. Quantity from 16 to 20 pcs. thereby achieving a reserve for a time of more than 10-15 minutes. Structurally, they consist of the UPS itself, which performs the functions of management, conversion, network monitoring, a high-power charger and one or more battery racks or cabinets with high-capacity batteries.

UPS 10-15 kVA three-phase 3/3

• UPS 15 kVA three-phase L900Pro-S 3/3 Lanches

  Power 13.5 kW. On-Line. There is a battery. Pure sine.

• UPS 15 kVA three-phase L900Pro-H 3/3 Lanches

  Power 13.5 kW. On-Line. There is no battery. Pure sine.

• UPS 10 kVA three-phase L900Pro-H 3/3 Lanches

  Power 9 kW. On-Line. There is no battery. Pure sine.