Most of distributed roof PV station will use 166 solar panel

166mm solar cell will become the main specification for the solar modules.

166mm solar cell rapidly occupy the distributed market with their advantages of flexibility, lightness, high efficiency, full load and stable income. At present, they have become the mainstream of module selection in the distributed field. The reasons are following:

1、 The large-size solar module of large silicon wafers are of high value in ground power plants

For solar power station projects on the ground, the component size can be increased to a certain extent (from 2.2m2 to 2.6m2 and the solar module can  maintain considerable reliability and be handled by two people). Large solar module can save costs.

1)If we can be supported by terrain conditions , the increase of support size apportions the single cost of support and foundation. 2)The cost of cable and inverter is saved; 3)The labor cost is saved.

According to the calculation, in large-scale power station, 182 / 210 module can save about 5 points / W of  BOS cost compared with 166-72c module. Due to its higher efficiency, 182 module has 0.5 ~ 1 point / W lower BOS cost compared with 10 module.

2、 Advantages of 166 photovoltaic modules in roof distributed power plants

Different from the logic of the ground power station, the roof distributed power station needs to be covered with the roof as much as possible, and one person can move it. In economically developed countries that pay attention to workers' working conditions, 166-60csolar module are generally used, with a weight of < 20kg and an area of about 1.8m2. In less developed countries, people like to use 166-72c module, and the weight of the module increases to the limit of 23.5kg.

182 / 210 modules with a power of 400W are not competitive. In particular, the 40c-210 module adopts 3 slices. The increase of slice loss and mismatch increases the cost and reduces efficiency of the module, and the cost performance is far lower than that of the 415w 166-66c module.

Many roofs are paved vertically with 60C and 66csolar module of 166, 11 × 3 can be filled, but thesolar module of 166-72c cannot be filled in 3 rows, and 210-40c assembly can only be filled in 10 rows (10 rows × 3)。 In this case, the 166-66c module has the highest total installed capacity and the highest cost performance.

In addition, the working current of 166 module is lower than 11a, which can widely match distributed inverters, power optimizers and micro Inverters from different manufacturers and power segments around the world. There are many inverter models in roof distributed projects, and the certification and power grid access standards in different countries are different. Therefore, the time cycle and cost required to comprehensively improve the current are very high. It is difficult for large silicon chipsolar module to challenge the  position of 166 sollar cell in the household market.

3、 The advantages of 166 photovoltaic modules in industrial and commercial distributed projects

Small businesses are similar to residential roofs. For large-scale industrial and commercial application scenarios, a large number of solar module are usually arranged in pieces (leaving a certain maintenance channel space), rather than carrying two strings of solar module with a single support like the ground power station, and there is no need for pile foundation, and the amount of support metal is low. Therefore, the BOS cost savings brought by large solar module are significantly reduced, mainly due to slight labor cost savings. As in the consumer market, improving component efficiency to increase the total installed capacity is the most important. In addition, 166 assembly has better load capacity under the installation form of four point installation.

If the roof is flat and easy to handle, large businesses can also use 182solar module with high efficiency. 210-55c and other ultra-high current solar module have no series inverter to match, and ultra-high current also brings higher security risks to roof applications.

In the future, 182 solar module will be used in ground power stations, and 166 solar module will be used in household and industrial and commercial roof power stations.


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