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Heat Pump Solution

DC Inverter Heat Pumps for Hot Water System

Suoher DC inverter heat pump has the advantages of high efficiency, energy saving, and intelligence in heating hot water, and is suitable for various scenarios, from households to commercial and industrial fields. With proper selection of system design and technology integration, sustainable hot water supply solutions can be achieved. Not only meets the diverse demands of different settings but also improves energy utilization efficiency, reduces energy consumption and operating costs, and promotes sustainable development.

Residential Hot Water System

In terms of residential hot water, Suoher DC inverter heat pump water heaters can extract heat from the surroundings to heat water for domestic use. Compared to traditional gas or electric water heaters, heat pump water heaters can convert energy with higher efficiency, reducing energy consumption and operating costs. Additionally, heat pump water heaters are energy-efficient and environmentally friendly, suitable for domestic hot water supply and can meet various needs such as bathing, cleaning and heating, with no air pollution, making them a sustainable choice.

Commercial Hot Water System

For commercial hot water, Suoher DC inverter heat pump water heaters can meet the hot water demands of hotels, restaurants, hospitals, office buildings, swimming pool, gymnasiums and other establishments. By utilizing ambient heat for heating, commercial heat pump hot water systems provide a steady and reliable supply of hot water for places that require large volumes of hot water. They can also be adjusted flexibly based on demand, improving energy utilization efficiency and reducing energy consumption and operating costs.

Industrial Hot Water System

In terms of industrial hot water, Suoher heat pump hot water systems can be applied in various industrial sectors, including chemical, food processing, textile, pharmaceutical, and more. By utilizing ambient heat for water heating, industrial heat pump water systems fulfill the need for high-temperature hot water in industrial processes. The heat pump hot water systems improve energy utilization efficiency, reduce energy costs, and decrease reliance on traditional energy sources, thereby offering significant economic and environmental benefits.

Suoher Heat Pump Experts

By Heat Pump Water Heater Installation Method

Our Monoblock DC Inverter Heat Pump is divided into split and monoblock machines so that you can choose the appropriate installation method based on their needs.

Split DC Inverter Heat Pump For Water Heating

Only the refrigerant circulation system is placed in the outdoor unit. The indoor unit can be installed in a bathroom, kitchen or utility room. Since all the waterway systems are on the indoor side, there won’t be troubled by icing even in extremely cold winters. So split machine will work more safely and reliably in cold regions.

Monoblock DC Inverter Heat Pump For Water Heating

It is monoblock design, space-saving and easy to install. Simply connect the waterway and power supply to start up and operate. It runs automatically and stably all day, and has reliable performance.

Heat Pump Water Heater Control Method

More Intelligent and Convenient Control of Heat Pump Water Heaters

With WiFi and remote control, DC inverter heat pumps can be more intelligently controlled to improve the quality of life.

WIFI Control

Combining WiFi technology with a Heat Pump Water Heater achieves the control of heating temperature, which can save energy and improve quality of life and efficiency.

Remote Control

The remote control allows you to adjust the temperature anytime and anywhere, achieving high efficiency and energy conservation while ensuring the normal operation of a Heat Pump Water Heater.

Selection Suggestions for Inverter Heat Pumps

Key Points for Choosing the Best Heat Pump Water Heaters

Before selecting a model, carefully reading the following key points, which can help you find the model that best meets your requirements.

If You Have Any Questions About Heat Pump Water Heater, Please Consult Us Immediately

Suoher experts will communicate with you in time to solve your confusion

Maximum Water Temperature

For heat pump water heaters, the highest water temperature is an important performance indicator. Most heat pump water heaters on the market can reach a maximum water temperature of 60 ℃, while Suoher's heat pump water heater can output 80 ℃ hot water to meet more hot water needs.

Operational Stability

Is the operating pressure and current stable to avoid triggering pressure protection and causing the heat pump water heater to stop operating. To solve this problem, Suoher used a high quality compressor and a sufficiently large evaporator and condenser, which can operate stably in low temperature environments.

Higher COP

For heat pump water heaters, although they are already more energy-saving than gas water heaters, electric water heaters, etc., if they have a higher energy efficiency ratio, they will have a competitive advantage and be more popular among users. Suoher heat pump water heaters are always committed to producing more hot water with less energy consumption.

Intelligent Operation

In order to promote green environmental protection and enable users to use more energy-efficient hot water solutions, Suoher's designed heat pump water heaters can be adapted to solar water heaters, gas boilers, and electric boilers, always providing users with hot water in the optimal heating method.

Suoher Products

Heat Pump Water Heaters Recommended

In order to meet your different needs, we recommend multiple models, each with its own unique features and advantages.
150LHeat Pump Water Heaters(SHWW-3T150)

Internationally renowned brand compressor, R410a refrigerant, water and electricity separation, safe and reliable

200L Heat Pump Water Heaters(SHWW-3T200)

LCD large screen display controller, reverse cycle defrosting, running all day, saving 75% power

200L-300L Heat Pump Water Heaters(SHWW-3T200/SHWW-3T250/SHWW-3T300)

One machine with multiple functions, using a LCD display controller, simple program operation, and low noise.

500L Heat Pump Water Heaters(SHWW-3T500)

Super large capacity hot water, stable water temperature, stainless steel 304 inner liner, corrosion resistance, high pressure resistance

Suoher Project Cases

Our Heat Pumps are Sold in 50+ Countries around the World

Suoher has established long-term trust relationships with many customers for more than a decade, and we will continue to upgrade our technology to create a green future with you.


Suoher has successfully supplied a considerable number of air source heat pumps and ground source heat pumps to meet the energy needs of our regular customers in Britain. The exceptional performance and reliability of these heat pumps have left our customers extremely pleased and satisfied with their decision to choose our products.


Serbia is cold in winter and snows heavily. Suoher EVI heat pump can provide hot water at 55 degrees Celsius in bitterly cold weather, so it can ensure the supply of heating and hot water for customer rooms. The performance of Suoher heat pumps has received unanimous praise from Serbian customers.

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Become our partner and help you achieve success in the field of heat pumps. Join Suoher in striving for 2050 net zero emissions!

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Frequently Asked Questions of Heat Pumps

  • What is a heat pump and why we choose it to heat and cool?
    What is a heat pump?

    A heat pump is an electrical device that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used around the world for decades. Refrigerators and air conditioners are both common examples of this technology.

    Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of evaporation and condensation (see Figure 1). A compressor pumps the refrigerant between two heat exchanger coils. In one coil, the refrigerant is evaporated at low pressure and absorbs heat from its surroundings.The refrigerant is then compressed and sent to the other coil, where it condenses at high pressure. At this point, it releases the heat it absorbed earlier in the cycle.
    Refrigerators and air conditioners are both examples of heat pumps operating only in the cooling mode. A refrigerator is essentially an insulated box with a heat pump system connected to it. The evaporator coil is located inside the box, usually in the freezer compartment. Heat is absorbed from this location and transferred outside, usually behind or underneath the unit where the condenser coil is located.Similarly, an air conditioner transfers heat from inside a house to the outdoors.

    The heat pump cycle is fully reversible, and heat pumps can provide year-round climate control for your home heating in winter and cooling and dehumidifying in summer. Since the ground and air outside always contain some heat, a heat pump can supply heat to a house even on cold winter days. In fact, air at –18°C contains about 85 percent of the heat it contained at 21°C.

    A heat pump water heater can heat or cool , the heating function is used the most, and commonly used for house heating, domestic hot water or swimming pool water heating. It absorbs heat from air or ground, then transfers the heat to water for pool water heating, room heating by radiator, underfloor coil or water fan coil. 

    According to the souce of the heat , there are two types of heat pump water heater, one is air source heat pump and the other is ground source (also called earth energy, geothermal) heat pump. An air source heat pump absorbs heat from the outdoor air in winter and rejects heat into outdoor air in summer. It is the most common type of heat pump found in homes at this time. A ground source heat pump which draws heat from the ground (soil, rock) or water (underground water, river, lake), are also becoming more widely used.
    Why we choose it to heat and cool?

    Heat pump is a low-carbon energy-saving product, it is high efficiency, energy-saving, safe and reliable, environmentally friendly, intelligent and durable. It can be used all year round the year. The use of heat pump will not be influenced by bad weather such as overcast, rain, snow, and it does not produce any exhaust gas, waste water and waste residue emissions. 

    The operation cost of heat pump water heater is only 1/4 of the electric water heater, 1/3 of the oil and gas water heater, and 1/2 of the solar water heater, therefore installing a heat pump is an effective way to reduce our energy costs.
  • How many types of air source heat pump do we have?
    Usually, we say air source heat pump for the heat pumps whose heat source is air, which means they absorb heat from the air and transfer the heat to water. However, there are different types of air source heat pumps if we classify them based on the application and the different technology used on the heat pumps.

    Based on the application, air source heat pumps includes air source heat pump for swimming pool water heating (usually we call it swimming pool heat pump) and air source heat pump for house heating or domestic hot water. Based on the different compressor technology, there are on-off (constant frequency) air source heat pump, DC inverter air source heat pump and EVI air source heat pump which works at minus 25 degree.
  • How does the EVI heat pump compressor work?
    Copeland EVI Scroll compressors are equipped with a vapor injection connection for Economizer Operation. Economizing can be accomplished by utilizing a subcooling circuit similar to the circuit shown in Figure 1. This increases the refrigeration capacity and the system efficiency. The benefits provided will increase as the compression ratio increases.

    The schematic shows a system configuration for the economizer cycle. A heat exchanger is used to provide additional subcooling to the refrigerant before it enters the evaporator. This subcooling process provides the increased capacity gain measured in the system. During the subcooling process, a certain amount of refrigerant is evaporated. This evaporated refrigerant is injected into the compressor and provides additional cooling at higher compression ratios.
    The P-h diagram (Figure 2) shows the theoretical gain in system performance acquired by using the economizer cycle. The extension outside of the vapour dome provides the enthalpy increase, enhancing system performance. Although power increases due to the vapour injection into the compressor, there is still a significant efficiency gain because the capacity gain exceeds the power increase.
    (The above content is from EVI Theory of Operation by EMERSONSON Climate Technologies)

    With the EVI heat pump compressor technology, the EVI heat pump is able to work down to  -25℃ the minimum. It works efficiently in heating to provide stable and comfortable heating or hot water for our house.
  • How to work out the swimming pool heat pump's heating capacity needed for our pool?
    It is complicated to work out the heating capacity needed for the swimming pool, if we base on the strict calculation way with all factors considered inside. It's not an easy things for people who are not in the field of heat pumps. Here we'll introduce a simple way to help you to work out the heat capacity needed for our swimming pool. 

    Before the calculation , we need to know the pool size, the initial pool water temperature (usually equal to the ambient temperaure) and the target water temperature. The following is the calculation formula.

    Heating demand of the swimming pool = C * 1.163 * △t  / T


    C = cubage of the swimming pool water  ( in m3 )

    △t = target water temperature  -  initial water temperature

    ( for instance, if you want to heat the pool water from 20℃ to 30℃, the △t  = 30℃ -20℃ = 10℃ )

    T = heating duration ( we can choose 24 hours, 48 hours or 72 hours,  the shorter the time, the quicker the pool water becomes hot, as the heating power of the swimming pool heat pump will bacame larger accordingly)

    If we want to heat up the pool water in short time, we can put the heating duration short, then the heat capacity of the swimming pool heat pump will be larger. The heating duration is the first time to heat up the swimming pool, as usually there is thermal insulation for the swimming pool, the following heating duration will be less than the first time if the thermal insulation is well made.

    With the above instruction , it will help us to work out the swimming pool heat pump suitable for our pool size.
  • What are the advantages of the DC inverter heat pump?
    DC inverter heat pump becomes a trend and popular in recent years. It is well known because of its changeable running frequeny, then what advantages do the dc inverter heat pump has? The DC inverter heat pump is with soft start, so the starting current is low. It can work down to  -25℃,  provides us with comfortable and constant water temperature. It is high efficiency, energy saving, environment friendly, as well low noise.
    1) Soft start, low starting current 

    With soft start function , the heat pump can start smoothly and so reduce the starting current to avoid the trip due to the overcurrent. Besides, because there is no current impacting on the compressor, the lifespan of the DC inverter heat pump machine is prolonged. 

    2) Comfortable and constant water temperature 

    The running frequency of the inverter heat pump compressor is automatically adjusted based on the change of the ambient temperature and water temperature. When the ambient temperature is low, the compressor runs in high frequency and the target water temperature is reached quickly. When the ambient temperature is high, the compressor decreases the running frequency and runs in low frequency to keep the water temperature stable. Thus the room temperature or hot water temperature is always comfortable and constant.

    3) High efficiency and able to work down to -25℃

    As the variable running frequency at the different ambient temperature, it makes the DC inverter heat pump more adaptable to work in low temperature environment and work down to -25℃, meanwhile make sure the efficient heating at low temperature.

    4) Low noise 

    There is no frequent start and stop on the heat pump machine so it is not only less noise but also energy saving. Besides, when the DC inverter heat pump runs in low frequency , the noise is also relatively low, so it provide us more quiet and comfortable environment. 

    5) Energy saving and environment friendly

    As any of other types of the heat pumps , DC inverter heat pump is a low-carbon energy saving product. It does not produce any exhaust gas, waste water and waste residue emissions. The operation cost of the DC inverter heat pump is only 1/4 of the electric water heater, 1/3 of the oil and gas water heater, and 1/2 of the solar water heater, therefore installing a DC inverter heat pump is an effective way to reduce our energy costs.
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