General description:
Photovoltaic module is a sunlight power generation unit that directly converts solar energy into direct-current electric energy. According to users¡¯ different requirements on power and voltage, photovoltaic modules can be individually used or connected either in series (to meet voltage requirement) or in parallel (to meet current requirement) to form power supply generation system to provide higher electric power. SEC photovoltaic modules has such features as high-area-ratio power, long life and high reliability, and within the service life of 20 years with an output power reduction not exceeding 20%.

 SEC modules are composed of solar cells with high conversion efficiency, EVA sheet, solar glass and Tedlar (TPT) back sheet compounded from fluoro-plastic and dacron. The module adopts reliable welding technology and high-vacuum heating lamination process and is equipped with anticrrosion-treated aluminum alloy frame and watertight terminal box. As a result, it takes on a rational structure, and has an ultraviolet aging resistance and wind resistance of up to 2400Mpa (see figure S-85C)

the structure of S-85C crystal silicon module

the structure of the back and mounting holes are shown as the following figure

the structure of the back and mounting holes

In the figure

L - length of module
W - width of module
H - thickness of module
B - lateral distance between mounting holes
A - longitudinal distance between mounting holes
N - size of mounting hole
G - mounting position of terminal block