What is a photovoltaic frame?
The photovoltaic frame is an important component of solar photovoltaic modules. Its function is to encapsulate materials such as solar cells, glass, and back sheets, enhancing the module's strength for easier transportation, installation, and protection of the photovoltaic module. Therefore, photovoltaic frames need to have strong load-bearing capacity and corrosion resistance. The performance of the frame directly impacts the installation and lifespan of the solar module.
According to materials, photovoltaic frames can be divided into aluminum alloy frames, steel frames, and composite material frames.
Aluminum profiles are the most commonly used material in photovoltaic frames due to their light weight, strong corrosion resistance, ease of shaping, high strength, ease of machining, and recyclability.
Module manufacturers have specific mechanical and functional requirements for photovoltaic frames, especially for solar modules used in coastal areas. These requirements include ensuring that the frame can withstand a back pressure of at least 4000Pa; the design must prevent back glass breakage and module bending deformation; it should also avoid issues like damage to the sealing glue under large temperature differences; and it should ensure stable power output and high energy generation capacity.
Each of the three types of frames has its characteristics. For instance, aluminum alloy frames have a proven lifespan of 30-50 years and are easy to process into shape. Steel frames are the least expensive among the three types. Composite material frames offer excellent weather resistance, making them particularly suitable for marine environments. They are also easier to install and do not require grounding.