Photovoltaics丨Why is the size of photovoltaic modules not “infinite”?

How to select the size of photovoltaic modules?

Photovoltaic modules are one of the most important components of photovoltaic power stations. The cost of photovoltaic modules in the entire photovoltaic power station accounts for more than 40% of the total cost of photovoltaic power station construction. The quality of photovoltaic modules is directly related to the quality, power generation efficiency, power generation, service life and rate of return of the entire photovoltaic power station.

In the design and calculation of photovoltaic power generation system components or arrays, the total capacity and power of the photovoltaic components or the entire array are calculated based on the power consumption or planned power generation. After determining the number of series and parallel connections of the photovoltaic components, it is necessary to determine the shape and external dimensions of the photovoltaic components, as well as the overall arrangement of the entire array, based on the specific installation location of the photovoltaic components.

Photovoltaic modules are commonly available in sizes of 166, 182, and 210. The numbers represent the size of the silicon wafers in each module. For example, 166 represents a photovoltaic module with a 166mm silicon wafer in both length and width, and 210 represents a photovoltaic module with a 210mm silicon wafer in both length and width.

G1 silicon wafer photovoltaic module size:

60 pieces: 10681002 (mmmm)

66 pieces: 18411002 (mmmm)

72 pieces: 20081002 (mmmm)

78 pieces: 21661002 (mmmm)

166mm silicon wafer photovoltaic module size:

60 pieces: 17551038 (mmmm), 17651048 (mmmm)

72 pieces: 20941038 (mmmm), 21081048 (mmmm)

182mm silicon wafer photovoltaic module size:

54 pieces: 17221134 (mmmm)

60 pieces: 1 9031134 (mmmm), 19081134 (mmmm)

72 pieces: 22781134 (mmmm)

78 pieces: 24651134 (mmmm)

210mm silicon wafer photovoltaic module size:

40 pieces: 17541096 (mmmm)

50 pieces: 21871102 (mmmm)

55 pieces: 23841096 (mmmm)

60 pieces: 21721303 (mmmm)

66 pieces: 23841303 (mmmm)

The factors affecting the module size include the silicon wafer size and the battery size, the module design, and the specifications and sizes of the raw and auxiliary materials. The silicon wafer size determines the battery size and is the direct factor affecting the module size.

The internal current of oversized components will increase. At the same time, due to their large size and weight, they will also bring problems such as installation, transportation, and product reliability. For example, the glass production line (kiln and tempering furnace process) limits the width of photovoltaic glass. At present, the glass production line is gradually upgraded and put into production to produce wider photovoltaic glass; the length of photovoltaic glass is not limited by the production line manufacturing equipment.

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