What is a solar water heater?

Solar water heaters are commonly used today in households with the purpose of saving electricity consumption for the family. Water heaters become a necessity in our daily lives because of the increasing demand for hot water. So what is a solar water heater? Join us to learn about this type of water heater through the article below.

A solar water heater, also known as a solar water heater, is a device that relies on solar energy to generate heat, using a solar battery to absorb sunlight to converts light energy into heat and heats water for use. The water heating efficiency reaches 96 - 98 degrees Celsius. Hot water will be stored in an insulated tank for long-term use.

A solar water heater usually has 3 main parts: the heat absorber, the hot water tank and the holder.

This is an important part of the water heater, used to absorb sunlight and transfer heat to heat the water. 2-layer heat-absorbing tube with good impact resistance

Also known as 3-layer 304 stainless steel insulation tank with high durability. The bottle has good insulation, high temperature resistance up to 160 degrees Celsius and the ability to keep heat for up to 72 hours

The bracket is made of stainless steel frame, sturdy and durable. The bracket is specially designed to match the installation location of the water heater, ensuring the right tilt angle to receive the best sunlight, for optimal heat absorption.

Solar water heaters are divided into 3 types, below are the characteristics of each type:
- Vacuum tube solar water heater: Using vacuum tube as heat absorber, covered with 5 layers of gold core.

- Oil tube solar water heater: Using oil tube as a heat absorber, covered with 3 layers of copper, silver, titanium to help absorb heat well.

- Flat plate type solar water heater: Using flat plate as heat absorber, protected by a high-grade toughened layer.

- Solar water heater uses a free, renewable, never-ending resource.

- Large tank capacity, and long heat retention time up to 72 hours.

- The water heater is made of durable materials, so it has a long service life.

- Using solar water heaters helps to reduce electricity costs for the national grid.

- Easy to install and use everywhere, especially in remote areas when the national grid system cannot reach.

- Safe for users and friendly to the living environment, avoiding fire and electric shock.

- Its initial cost is much more expensive than electric or gas water heater.

- Poor use efficiency when there is no sun, easy to stick to dirt, moss, leading to poor performance of the machine. Therefore, to ensure the performance of the machine, you need to have a regular cleaning mode.

- Solar water heater requires a lot of space to install, so it is often placed on the roof or in places where there is space outside the house.

- The heating time is long, the water tank is large, so it takes a while to heat up all the water.

Choosing a good and efficient solar battery is not easy at all. Here are a few experiences to help us choose the right solar water heater for your family.

- The tank has a capacity of about 120-160 liters, suitable for houses with less than 4 members.

- The tank has a capacity of about 160-200 liters, suitable for families with 5 to 8 people.

- The tank has a capacity of about 200-300 liters, suitable for families of 9 people or more.

- If there are more users such as hotels or motels, the tank should have a capacity of over 300 liters.

This is the outer protective layer that requires it to be of good quality, durable, not oxidized, .. because it is often subjected to the adverse effects of the climate. Only then will it be able to withstand the great effects of the weather. Therefore, the material used for the insulation of the tank is also of great interest, 304 stainless steel or aluminum alloy with a layer of electrostatic paint, which is considered the most advanced today. These are two sturdy materials that are extremely resistant to corrosion and impact.

The job of the Polyurethane insulation layer is to maintain the temperature of the hot water inside the insulation tank. This insulation layer to work well requires a minimum thickness of 5cm, has great hardness, the surface must be smooth and without small holes.

With a solar water heater, the strong or weak heat absorption depends mainly on the heat collector tube part. Therefore, the higher the heat-absorbing efficiency of the heat-collecting tube, the correspondingly increased service life and durability of the machine.

In terms of price, the current solar water heater lines on the market have relatively high prices, ranging from 3 to 80 million VND/machine.
- Vacuum tube solar water heater: The price is from 5 to 10 million VND.
- Oil tube solar water heater: Price from 8 to 20 million VND
- Flat plate solar water heater (premium type): The price ranges from 20 to 80 million VND

The point that I appreciate about the solar water heater lines is the long warranty period, most products have an average warranty period of 5-10 years, some high-end brands The machine also has a warranty period of up to 20 years.

With equipment with a longer warranty period, it proves that the solar water heater manufacturer is confident in the products they sell in the market. Since then, consumers are also completely assured of the quality and durability of the machine.