Full-Screen PV module by DAH Solar generates 11.5% more power

Full-Screen PV Module, a product innovated by DAH Solar, has been proved to generate 11.5% more power, according to an outdoor field test report published by TüV Nord. The product has received patents in 18 countries and regions.

The rooftops with small-angle installation conditions would form the bottom soiling due to rain wash and altitude intercept between the regular PV module frame and glass. This problem is the primary reason that causes shading problems and hotspots on commercial and residential PV systems.

Bottom soiling could form a shading belt in different widths. In some extreme conditions, the shading belt could completely cover the PV module, which will reduce power generation, harm generation capacity, and shorten the life span of the PV module.

The Full-Screen PV Module with a frameless front could allow the natural rainfalls wash away the dust. This design would avoid bottom soiling and minimize power losses induced by dust covering.

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Ningxia Outdoor Field Test PV Power Station,there is no dust accumulation at the bottom of the full-screen Modules, and serious dust accumulation at the bottom of the regular modules

Field test by TüV Nord in Ningxia Province

The outdoor field test site for the Full-Screen PV Module is located in Xixia District, Ningxia Province (38°36’56.77” N,106°0’52.27” E). The demonstrative test was implemented by TüV Nord with its testing and demonstration platform. The test used 182mm-cell Full-Screen PV Module (DHT-M60X10/FS-460W) with frameless front A-side design, which was independently innovated by DAH Solar, and 182mm-cell regular PV modules (DHT-M60X10-460W).

To control variables, each module contains 6*30 cells, and the power is both 460W. All the modules used in the test are 182mm-cell mono PERC modules. The fixed installation angles for both types of modules are 5° (simulate the installation angles of color steel tile rooftop). The comparison groups used the same micro-inverters for MPPT tracking.

These two groups could showcase different power generation performances for two types of modules under natural conditions. Before the field test, the two groups were exposed to the sunlight 60Wh/m2 and tested the initial power generation.

Then the lab controlled the installation method, ground condition (soil, sand, rock, and grass), and the length of the PV cable.

2.pngNingxia Outdoor Field Test PV Power Station

The front irradiance is 170.28 kWh/m2 in April. DAH Solar’s Full-Screen PV module generated 73.21 kWh, and the cumulative power generation per watt is 161.17 Kwh/kW.

The regular PV module generated 65.06kWh, and the cumulative power generation per watt is 144.54kWh/kW. Compared to the regular PV module, the Full-Screen PV module increased the power generation by 11.5%. This field test shows that the Full-Screen PV module has advantages in avoiding bottom soiling and reducing dust covering.

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Comparison Power Generation Results between the Full-Screen PV modules and the regular PV modules in Ningxia Field Test PV Power Station

Analysis of Power Response Characteristics of PV Modules in Different Temperature Ranges

The power responsiveness data of the two modules in each temperature range indicated that in each operating temperature range, the performance of the Full-Screen PV module per watt (performance per watt = average power ÷ measured power) is better than that of the regular PV module. As the height increases, the difference in power response characteristics between the Full-Screen PV Module and the regular PV module is proportionally increasing.

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Ningxia Field Test PV Power Station Data Comparison of Power Response Characteristics of PV Modules in Different Temperature Ranges

Analysis of PV Modules Strong and Low Light Response Characteristics

In order to research the power generation performance of the 2 types of module under various irradiation values. TÜV NORD compared the power response characteristics of the 2 types of module in each irradiation range. The result showcase that the Full-Screen PV Modules’performance is better than the regular PV modules in each irradiation range. As the irradiation value increases, the difference in power response characteristics between the Full-Screen PV Modules and the regular PV modules also increases proportionally.

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Ningxia Field Test PV Power Station Data Comparison of PV Modules Strong and Weak Light Response Characteristics

The Full-Screen PV Module is innovated by DAH Solar. This product holds a global patent in China, Brazil, Germany, Spain, The United States, Australia, Japan, and other 18 countries and regions. The Full-Screen PV Module obtained high recognition and reputation all over the world, because of its power generation increasing and product reliability. The Full-Screen PV Modules are used in a wide variety of commercial and household roof PV power stations and BIPV projects. The Full-Screen PV Module won the TÜV Nord Outdoor Field Performance Award.

Picture 6 the Full-Screen PV Module Projects and TÜV Nord Outdoor Field Performance Award

DAH Solar believes innovation is the way to lead development. DAH Solar innovates and develops based on the needs of the PV market and aims to solve the sore point of the PV industry. We work on the user's power generation revenue and product cost performance. We continuously increase R&D investment and bring higher valuable PV products to the industrial, commercial, and household markets.