The Price and Service Life of Household Solar Panels

The rapid development of solar power generation and solar cell technology has prompted household solar panels to enter small family units in urban and rural areas, and users have begun to care about the service life and price of household solar panels. This article introduces them in detail.

The core part of the solar power generation system is the household solar panel, which converts the light energy of the sun into electrical energy, and outputs direct current and stores it in the battery. One of the most important components in home solar power generation is the solar panel. An important factor in determining whether a solar cell is useful is the lifespan and the conversion rate of the panel.

• Solar panels

How many square meters of solar panels to buy depends on the electricity demand of your family. Generally, polycrystalline silicon/monocrystalline silicon is considered as the solar cell material. However, due to the high cost of monocrystalline silicon materials, polycrystalline silicon materials are generally used. If you choose a polycrystalline silicon solar panel with a power of 250W, then a 5KW system needs 20 panels.

• Solar bracket

The solar bracket is a special bracket designed for installing, placing, and fixing solar panels in a solar photovoltaic power generation system. It is usually made of stainless steel or aluminum alloy, and the service life is longer after hot-dip galvanizing. A solid and reliable photovoltaic support should preferably withstand the test of a typhoon of level 12, but generally the support is fixed according to the largest typhoon in the local area over the years.

• Cable

Appropriate cable specifications should be selected according to the power consumption. Usually, in order to ensure that the cable will not be burned, it is recommended to select a larger maximum current that the cable can withstand.

• Photovoltaic inverter

Photovoltaic inverters with appropriate power should also be selected according to electricity demand, otherwise it will lead to unstable electricity consumption and affect the service life of the entire solar photovoltaic power generation system.

• Battery for energy storage

The storage battery has the function of storing the electric energy from the solar panels when the light is shining, and releases it when needed. Purchasing batteries according to demand, and installing them in series and parallel combinations according to the needs of electrical equipment.

The current price of household solar panels is about 15 yuan per watt. The panels are divided into various types, ranging from tens of watts to more than 300 watts. They can be installed according to the actual power consumption of the family. For example, a 30-square-meter battery panel requires about 20 180W panels or 15 240W panels (about 4000W in total), one inverter, and about 35 to 40 batteries (120V100A). The battery panels account for 60% of the total cost. , the current market price of one watt is about 15RMB, the battery accounts for about 30% of the total cost (about 600RMB a piece), the inverter accounts for about 5% of the total cost (about 3000-4000RMB), and the other accounts for about 5% of the cost. The total cost is about 100,000 yuan, and the daylight time is calculated as 6 hours, and the daily power generation is about 20-30 degrees.

The service life of household solar panels excludes force majeure natural disasters and human factors, and is used under normal conditions. According to the current user feedback from normal use, the service life of different types of solar panels is also different.

At present, more than 95% of the solar panels on the market are solar panels encapsulated by tempered glass lamination. years, and the life of solar panels packaged in PET laminates is 5-8 years.

Power generation efficiency determines the life of photovoltaic modules, and the power intensity generated by solar panels under the same light irradiation is determined by the degree of bonding of the PN junction and the purity of the silicon wafer. As time goes by, the PN junction will continue to break, prompting The efficiency continues to decline. Generally, the conversion efficiency is above 90% after 15 years, and will drop to about 85% after 25 years. Therefore, the life of photovoltaic modules is basically more than 20 years.

To sum up, the above is a detailed introduction to the service life and price of household solar panels. The investment in photovoltaic power plants is a long-term and stable investment income project. Dawnice, as a well-known photovoltaic system service provider in the industry, guarantees the quality of power plants to ensure Long-term stable operation.