Distributed photovoltaic power generation systems are now entering more and more households, and more and more people are paying attention to this industry. However, businesses and customers have different understandings about the service life of solar energy and the years of warranty. How long does the system's components, inverters, accessories, etc. warrant the use of?
1, components
Components are the most expensive part of the entire system, and they are also the power core of the solar energy system. Then, should solar modules be warranted for several years?
Its warranty varies from brand to brand. We all know that the quality of first-tier component companies is divided into two categories: product quality assurance, power generation quality assurance, product warranty generally 10 years, quality assured components Can guarantee product quality for 25 years; power generation warranty is 25 years, power generation decay rate is about 20% in 25 years.
2, inverter
The cost of the inverter is not as high as the components. Although the cost is not the highest, it is the only power and electronics part of the entire solar energy system. It is also the brain of the solar energy system. It is very important to convert the direct current collected by the components into alternating current. An excellent solar energy system must be inseparable from stable operation and tracking of solar inverters with high efficiency. Then, how many years should the solar inverter be warranted?
The choice of inverter is related to the power generation problem of the entire system. Quality assurance of inverters is now guaranteed for 5 years. After the warranty period expires, it is extended to 25 years. Similarly, we can select the world's first-line solar inverter. The quality assurance of the transformer company is compared. However, it generally provides 5 years of quality assurance.
3, bracket
In addition to solar modules and inverters, there is a major part of the bracket system.
The bracket is a fixed protection for PV modules and it is also the main component of the whole system. The current bracket material is made of aluminum alloy and steel structure. From the material itself, both types can be used for more than 25 years. But Due to different processes, there are subtle differences. For example, if the thickness of the aluminum alloy is insufficient, it will cause oxidation, and the seashore will be weathered. In the steel support system, the surface needs to have sufficient galvanized thickness. Usually, hot dip is used. Zinc process. The surface is hot-dip galvanized. The average galvanized thickness is 65μm. The basic thickness of the bracket can be equal to or greater than 2.5mm. It has pressure resistance, high wind resistance, corrosion resistance, and the service life can reach over 25 years. Surface treatment process and its own strength is not enough, it may be damaged in three to five years.
Specifically mentioned are the wind resistance capabilities of the support system, including forward and negative wind pressures. Wind resistance levels in coastal cities should normally reach levels 12 and up to level 14, while in inland cities, they should 12 can be.
The support system should use materials supplied by well-designed stent manufacturers. Mature and reasonable solutions should be selected. It should not be completely DIY, and should be designed empirically. Especially for steel structural support systems, it should be designed and designed by qualified design institutes. Verification. Otherwise, once the wind in the X year came, the entire solar system collapsed.
4, other accessories
In addition to components, inverters and brackets, the rest are cables, electrical cabinets and other auxiliary materials.
Because cables are common parts, outdoor use should be made of anti-ultraviolet and anti-aging photovoltaic dedicated DC cables, because the photovoltaic system is subjected to wind and rain all year round, so as to ensure the service life and corrosion resistance of the cables. The cable should ensure that the ampacity is sufficient, the communication cable guarantees anti-jamming capability, and the service life can reach 25 years or more.
According to the actual use of other auxiliary materials, in the absence of artificial damage, the service life can be more than 25 years.
to sum up
Through the above points, we can analyze that the entire system's life, or warranty should be the shortest product as a deadline, and then through the replacement and maintenance of the equipment for the life of the entire system warranty.
The comprehensive warranty for components is 10 years, and the power generation guarantee is 25 years;
The inverter has a comprehensive warranty of 5 years and can be extended to 25 years.
The warranty for other materials should be 25 years.
