As time goes by, the power of solar panels increases. This is largely driven by the innovative technology of the solar cell itself, although the improvement of panel assembly technology has also played a role. The following is explained by specific changes:
Before 2010, the size of monocrystalline silicon chips was small, 125mm * 125mm and a few 156 * 156mm silicon chips. After 2010, 156 * 156 monocrystalline silicon battery chips occupied the mainstream of the market. It has been said before that the power of the solar panel depends on the size of the solar panel. After that, the manufacturing industry and process of solar cells accelerated, and 166 * 166mm, 182 * 182mm, 210 * 210mm and other specifications of solar cells slowly emerged in the market. It is not difficult to find that the size of silicon wafers has been increasing, because large-sized silicon wafers reduce the cost of solar modules at the silicon chip end, and dilute the cost of single watt non silicon in the solar panel, module, and system links, resulting in significant economic benefits. Therefore, the large-scale development of silicon wafers is inevitable.
Why are solar cells becoming larger and larger?
In terms of output, the production speed of solar cells is basically fixed. In other words, the process of making 156 * 156mm solar cells and 166 * 166mm solar cells is the same, and the time and labor costs are the same. That people are naturally willing to spend almost the same amount of money to get more powerful solar cells.
Secondly, from the perspective of the power station system, under the same power system, the modules get higher power due to larger solar cells, while the number of a string of modules remains unchanged. Therefore, the module efficiency on a single support is correspondingly improved, and the cost of support and pile foundation per Wp is reduced; When large components have little impact on the transportation and installation speed, the installation efficiency of each Wp component and bracket will be improved; Since the capacity of each array is determined by the inverter and can be considered fixed, high-power modules can reduce the use of combiner boxes or string inverters, and reduce the use of brackets to reduce the space occupied by the array (considering the front and rear spacing and left and right spacing of brackets), and reduce the number of brackets and their occupied space to reduce the use of power cables.
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