1.How long does it take to recover the cost of the investment in home solar power system?

The installed capacity of the general solar power system is about 3-10 kW. According to the different sun lighting conditions, user side electricity price, subsidies, and system costs, the cost can be recovered in about 6 years, and the life of the solar power system can reach 25 years. That is to say, the electricity revenue and electricity charges saved in the remaining 20 years will become direct profits.

Photovoltaic power generation goes into ordinary people’s homes, and people become electricity owners. Investment in power stations is profitable, and the state subsidizes power generation. Lying at home, the sun makes money for you. But do you know the following things about solar panels?

What is a solar panel?

Solar panel (also called solar module) is the core part of solar power generation system, and also the most important part of solar power generation system.

The solar panel is composed of high efficiency single crystal / polycrystalline solar cells, low iron ultra white textured tempered glass, packaging materials (EVA, Poe, etc.), functional backsheet, interconnection bar, bus bar, junction box and aluminum alloy frame. The service life can reach 15-25 years.

In 2020 novel coronavirus pneumonia affected the global economy. However, the PV industry in China was catching up with the flow. It has made remarkable achievements, and has maintained and continued many world first.

In 2020, China’s PV installed capacity will increase by 48.2gw, ranking first in the world for eight consecutive years; The cumulative installed capacity reached 253gw, ranking first in the world for six consecutive years; The scale of the industry continued to expand, and the four main links of the manufacturing end achieved double-digit growth. The output of polysilicon was 392000 tons, ranking first in the world for 10 consecutive years;

What is solar lighting?

Solar lighting is based on solar energy, which can realize photoelectric conversion through solar panels. In the daytime, battery is used to store and store electric energy, and in the evening, controller is used to supply power to electric light source, so as to realize the required functional lighting.

What are the components of solar lighting system？

Solar lighting system consists of solar panels, charge and discharge controllers, batteries, lighting lamps, cables and other main parts.

Solar energy is inexhaustible, clean, pollution-free, renewable energy, it is the most important new energy in the 21st century.

With the continuous development of solar energy technology, solar street lights are becoming more and more common in our life. We can see them on the main and secondary roads, residential areas, factories, tourist attractions, parking lots, and other places in the city. So how does the solar street light change the solar energy into electric energy, so that the lamp can illuminate? What parts does it contain? Now let’s have a detailed understanding.

Solar power generation is a technology that uses the solar effect of semiconductor interface to directly convert light energy into electric energy. The key component of this technology is solar cells. After the solar cells are packaged in series, a large area of solar panels can be formed, and then with the power controller and other components, the solar power generation system is formed.

The main components of a solar power generation system include solar panel, battery, controller, inverter, and tracking system

Many RV players have come to a conclusion through long-term experience: the electricity on the RV is less and less sufficient. It’s true that today, with the development of science and technology, when we travel, we will carry a lot of electronic equipment in the car, which leads to more and more places using electricity. Lack of electricity has become a pain point for many RV players. In order to solve this problem, more and more RV manufacturers begin to incorporate the solar charging system into the selection column of car purchases, which also attracts many potential buyers of RV. How to choose solar panels? How much power is suitable to install? Today, let’s talk about the solar panel of RV.

The maximum power of solar panel Pmax = open circuit voltage × Short circuit current, which is their ideal power, and usually, we measure the solar panel as the rated power PM. In practice, the rated power is less than the maximum power, mainly because the output efficiency U of solar panels is only about 70%. In use, due to the different light intensity, the power at different times is also different. According to the experimental data, its actual average power P = 0.7pm.

If the solar panel is to drive the load directly and make the load work stably for a long time, the rated power of the load is PR = 0.7pm. If the power of the solar panel is selected according to the power of the load, the power of the solar panel is PM = 1.43pr. That is to say, the power of the solar panel should be 1.43 times the load power.

The junction box is a connector between the solar array and the charging control device, it is an important part of the solar panel. It is a cross-domain comprehensive design combining electrical design, mechanical design, and material science. It provides users with a combination connection scheme of solar panels.

As a kind of solar panel connector, the main function of the solar photovoltaic junction box is to export the power generated by the solar cell module through the cable. Due to the particularity of the use of solar cells and their expensive value, the solar photovoltaic junction box must be specially designed to meet the requirements of the use of solar panels.