How much is the solar water heater? How to choose a favorite solar water heater?

Nowadays, science and technology are more and more advanced, and every household is using a lot of smart electrical furniture. In recent years, solar water heaters are very hot! Then do you know how much the solar water heater costs? How to choose a high-priced solar water heater? Where should the price of solar water heaters be considered? The following small series introduces the reference price of solar water heaters and some suggestions for purchasing solar water heaters! I hope I can help you! Welcome to read!

I. Price of solar water heater

Take 180 16 solar water heater as an example. Generally, it may be about 1500, and the better one is about 2500. It is recommended to buy a better one, because the general water tank or bracket begins to corrode after 5 or 6 years, and the better one can generally last 15 years. In the long run,

Second, suggestions on choosing the favorite solar water heater

1, brand after-sales

The choice of solar water heater depends on whether the appearance is exquisite and the after-sales service is perfect. Appearance is our first impression when we buy things, and after-sales service is the guarantee for us to use products.

As domestic solar water heaters are durable consumer goods, they are generally installed on the roof, and once they break down, it is difficult for users to solve them themselves. It is best to choose well-known brands and dealers with good after-sales service.

There are many brands in the solar water heater industry, among which, small family-owned enterprises account for the majority, which are weak in competitiveness and have an average life span of only three years. When consumers choose the products produced by such enterprises, they will often become three-no products in a few years, and the interests of consumers cannot be guaranteed. Therefore, consumers should choose famous brands. The solar water heaters produced by big brands not only have reliable product quality, but also provide consumers with long-term after-sales service guarantee.

2. Volume

The volume of solar water heater should be selected according to the specific water demand of each family. In general, the volume of products purchased can be determined according to the volume of 40-50L/ person.

Because solar energy is an unconventional energy source, it can't produce hot water in rainy days, so we should choose a water heater that doubles the daily water consumption and store hot water in sunny days for emergencies. In case of continuous rainy days, you can choose photoelectric dual-purpose to ensure that hot water can be used all day and all year round.

3. Installation method

Choose a solar water heater suitable for your own house installation according to the building structure.

Multi-storey building: installation is not limited, vacuum tube solar energy and flat solar energy products can be selected.

High-rise and small high-rise: balcony solar products can be selected.

Villa building: you can choose flat solar energy, which can be flexibly installed and integrated with the building. Flat solar energy is not affected by high-rise buildings and special buildings, and it is beautiful and generous.

4. Thermal performance index

When purchasing solar water heaters, choose appropriate thermal performance indicators.

Choosing a domestic solar water heater depends on the product quality report, which can generally be provided by the dealer. What are the thermal performance indicators of the quality report? The higher the "daily average efficiency", the better, that is to say, the high efficiency of Ming water heater to absorb sunlight and heat up; The lower the "average heat loss coefficient", the better, indicating that the heat preservation performance of the water tank is good.

5. Electron tube

When purchasing solar water heaters, you should choose high-quality all-glass vacuum solar collector tubes (hereinafter referred to as vacuum tubes). The quality of vacuum tube directly affects the performance of the whole household solar water heater. You must choose vacuum tubes manufactured according to national standards to ensure their high vacuum, uniform coating, uniform thickness, high thermal efficiency, low heat loss and long service life.

1) thickness

At present, vacuum tubes are divided into thick tubes (generally 58mm in diameter) and thin tubes (generally 47mm in diameter). Relatively speaking, the thick tube has large heat collection area, fast heat collection and high water temperature, so the thick tube solar water heater should be the first choice when purchasing.

2) Materials

There are mainly two kinds of materials for manufacturing vacuum tubes: single target machine and triple target machine, among which the quality of triple target machine is better, and consumers can identify it by appearance when purchasing.

The color of the vacuum tube of the single drone is gray with color difference, and the inner wall of the vacuum tube is light black;

The appearance of the vacuum tube of the third UAV is blue, with no color difference, and the inner wall is dark red.

3) coating

When buying, carefully observe the coating on the glass tube inside the vacuum tube. This kind of coating is called solar selective absorption coating. Due to the different manufacturing processes of various manufacturers, the coating color will be different, but it is generally black, dark blue or dark gray. The coating with good quality has uniform color, no scratches, peeling and falling off, and no stones and nodules on the glass. The bracket supporting the inner glass tube is placed correctly without looseness.

4) Vacuum degree

Let's talk about the vacuum degree of the vacuum tube first. You usually listen when you look at vacuum tubes. You can hear the buzzing sound when you put the nozzle of the vacuum tube on your ear. Usually a good vacuum tube.

6, heat preservation

The thermal insulation effect of solar water heater depends on the thermal insulation density of hot water storage tank and the vacuum degree of vacuum tube.

The water tank is very important for the water heater. Generally, heavier water tanks have better quality, and the weight is mainly determined by the material of the water tank shell and the foam layer between the water tank shell and the water tank liner. Generally, the shell of poor water tanks is made of shiny stainless steel (many big cities have banned the use of water heaters made of this material because of light pollution), and the shell is not thick enough and light in weight.

The insulation material of the water tank should be polyurethane foam, and the foam layer is directly related to the insulation effect of the water heater, so it is also very important for the use of the water heater. The foaming layer of famous brand products is generally foamed by high-pressure machine, so that there is no air between the shell and the inner container, and the foaming layer is dense and thick.

How do you know its density? You can pinch it with your nails, and you will feel that the hard density is up to standard and the heat preservation effect is good. Bad as a sponge.

7. Support

The main part of the solar water heater is outdoors, which is exposed to wind, sun and rain all the year round. Therefore, the bracket design of domestic solar water heater should be reasonable, and it needs sufficient strength and rigidity to ensure sufficient bearing capacity.

In some areas where the daily wind is strong, especially in coastal areas, when purchasing domestic solar water heaters, we should also pay attention to whether the products have wind resistance in design.

8. Safety

1)? Prevent lead from exceeding the standard

Most copper tubes in the market are recycled copper on the circuit board, which contains solder, and the lead in the solder cannot be extracted. Good copper tubes are generally made of high-quality brass by hot forging, and the lead content is controlled within the national standard.

2) prevent water from being charged

Ordinary corrosive stainless steel is used for electric heating tubes in the general market. It is best to choose Ingrid 800, which has a nickel-chromium content of more than 55% and can withstand dry burning for more than 72 hours.

9, pipeline

When purchasing solar water heaters, it is necessary to choose suitable pipes. Because the water heater is often placed on the roof, there is a certain pressure in the house. In summer, the hot water temperature is high (up to about 90℃) and the outdoor environment temperature is low. It is best to choose cross-linked pipes, aluminum-plastic composite pipes or reinforced plastic hoses.

It has the characteristics of pressure resistance, high temperature resistance, low temperature resistance, non-toxic, tasteless, small heat capacity, small heat loss and not easy to freeze in winter.

10, spare parts

Such as automatic water supply device, water temperature and water level indicator, solenoid valve, etc. The choice of these devices should be cautious. Some functions seem advanced, but there are too many components and the reliability is not high. It's easy to go wrong after a long time. Be sure to ask about the service life and warranty period when choosing.

Third, the maintenance and use of solar water heaters

There are several reasons why the water temperature of solar water heater is not high in very sunny weather: 1), and there are trees, tall buildings and other obstructions above the water heater.

2) If the water valve is not tight, tap water (cold water) will put hot water into the water tank.

3) Too much sediment in water (such as well water) is deposited in the vacuum tube, which affects the heat collection cycle.

4) Local air pollution is serious, and there is dust on the surface of vacuum tube.

If the above problems exist, the first step is to remove the obstacles or re-select the installation location. The second is to replace the water valve. The third is to disassemble the water heater and clean it with detergent and water. This situation is an example. Fourth, just scrub the vacuum tube.

I added water for nearly an hour in the morning, but when I used it at night, the amount of water was not large, as if the water tank was not full.

1)、? In this case, first check whether the tap water pressure is enough. If the pressure is not enough, you can add a micro pump. Second, look at whether the sewer pipe leaks. If water leaks, replace pipes, valves or connectors. The third case may be that the water tank itself leaks, and at this time, the water tank can only be replaced or welded again.

2) Why does the solar water heater leak?

First, the sealing ring is damaged or the water tank is not straight during installation. The solution is to replace the sealing ring or reinstall it to align the water tank with the vacuum tube. Second, tank liner welding. You can ask a professional to repair welding or replace the liner. Third, an indoor or outdoor pipe fitting is broken.

Sometimes the shower water temperature is hot and cold, which makes it uncomfortable to wash?

This is because the water tank pressure is high and unstable. At this time, users can add an auxiliary water tank on the roof, which can not only store cold water, but also stabilize and exchange cold water, or use an automatic temperature control valve.

In winter, hot water can't come down, but there is a lot of cold water?

1), the upper and lower pipes freeze in severe winter.

2) It's too cold.

3), no heat preservation. At this time, the dealer can keep the pipeline warm, and can also heat the pipeline with electrothermal antifreeze tape (plate).

In addition, there are techniques that can be used: first, empty the water tank after using hot water at night and fill it with water the next morning. Second, when it is coldest, open the hot water valve and slowly drip hot water to prevent freezing. At present, many manufacturers emphasize winter use as the standard in their design concepts, and solar water heaters are getting better and better in winter.

The above is a detailed answer about how much the solar water heater costs. I hope the reference price given by Bian Xiao can help you choose your favorite solar water heater. Nowadays, more and more people use solar water heaters, and there are more and more brands on the market, so it is inevitable that they will encounter entanglement when choosing to buy. So when buying, you should refer to other people's suggestions and learn some experience to help you buy a good solar water heater! Thank you for reading!