Distributed photovoltaic power generation systems are now more and more widely used in thousands of households, and more and more people are paying attention to this industry. However, merchants and customers have different understandings of the service life and warranty life of solar energy. Then, how long should the solar mounting components, inverters, and accessories of the photovoltaic power generation system be warranted? Let's analyze some of the existing data.
1, components
Components are the most expensive part of the entire system and the core of the solar system. So, should solar modules be guaranteed for several years?
Its warranty varies from brand to brand. We all know that the quality assurance of first-line component companies is divided into two categories, one is product warranty, the other is power generation warranty, the product warranty is generally 10 years, and the quality guaranteed components can achieve product warranty for 25 years; The quantity guarantee is 25 years, and the power generation rate is about 20% within 25 years.
2, the inverter
The cost of the inverter is not high, although the cost is not the highest, but it is the only part of the power system in the entire solar system, and the brain of the solar system. It is very important to convert the DC power collected by the component into AC. However, an excellent solar energy system must be inseparable from solar inverters with stable operation and high tracking efficiency. So, should solar inverters be guaranteed for several years?
The choice of inverter is related to the amount of power generated by the entire system. At present, the quality of the inverters with guaranteed quality is mostly 5 years, and the warranty period is extended to 25 years. Similarly, we can select the quality assurance books of the world's first-line solar inverter companies for comparison. However, a five-year warranty is generally provided.
3, the solar mounting bracket
In addition to solar modules and inverters, a major part is the solar panel support bracket system.
The solar panel support bracket is a fixed protection for the PV module and is also the main component of the whole system. The solar mounting bracket material is now available in aluminum alloy and steel structure. Both materials can be used for more than 25 years from the material itself. However, due to the different processes, there are subtle differences. For example, if the thickness of the aluminum alloy is insufficient, it will cause oxidation and the weather will be weathered by the sea. The steel solar panel mounting bracket system requires a sufficient galvanized thickness on the surface, usually using a hot dip zinc process. The surface is treated by hot-dip galvanizing. The average galvanizing thickness is 65μm. The thickness of the bracket can be equal to or greater than 2.5mm. It has pressure resistance, strong wind resistance and corrosion resistance. The service life can reach more than 25 years. If the surface treatment process and its own strength are not enough, it may be damaged in three to five years.
Special mention is made of the wind resistance of the solar panel support system, including forward wind pressure and negative wind pressure. Generally, the wind resistance level in coastal cities should reach 12 or higher, up to 14, while in inland cities, Level 12 is fine.
The solar panel mounting bracket system should use materials that have been carefully designed by the bracket manufacturer. It should be a mature and reasonable solution, and should not be completely DIY. It should be designed by experience, especially the steel structure bracket system, and should be designed and designed by qualified design institutes. verification. Otherwise, a wind of X years will come, and the entire solar system will collapse.
4, other accessories
In addition to components, inverters and solar panel mounting brackets, the rest are cables, electrical cabinets and other accessories.
Because the cable is a common component, the outdoor use should use UV-proof and anti-aging PV-specific DC cables, because the PV system is subjected to wind and rain all the year round, so as to ensure the service life and corrosion resistance of the cable. The cable used indoors should ensure sufficient current carrying capacity, and the communication cable can guarantee anti-interference ability, and the service life can reach more than 25 years.
According to the actual use of other auxiliary materials, the service life can be more than 25 years without human damage.
to sum up
Through the above points, we can analyze that the life of the whole system, or the warranty should be the shortest product period, and then through the equipment replacement and maintenance for the entire system life warranty.
The comprehensive warranty for the components is 10 years and the power generation warranty is 25 years;
The integrated warranty for the inverter is 5 years and can be extended to 25 years;
The warranty for other materials should be 25 years.