Full-screen modules are an innovation from Dah Solar for the photovoltaic market. Patented in more than 20 countries, the technology is suitable for use in rooftop or BIPV projects (photovoltaic systems integrated into architecture).
The full-screen photovoltaic module has no frame on the front, just a single piece of glass, which provides a more elegant design – in addition to the technical advantages. One of the main advantages of full-screen technology is the self-cleaning capacity of the modules. This is possible because the module has no visible frame on the front, which prevents the accumulation of dirt and reduces the risk of hot spots, as well as maintenance costs for cleaning.
TÜV Nord recently published a comparative field test report on DAH Solar’s 460 W PV modules – a monofacial module with full-screen technology and a half-cell module with mono-PERC technology, both with the same dimensions of 1910 x 1134 x 32 mm. The test results showed that the power generation of the full-screen module was 11,5% higher than that of the conventional half-cell mono-PERC module.
This advantage in terms of generation gain is characterized by the smaller amount of dirt that full-screen modules present in relation to other modules, mainly due to the structure of the module without a front frame, which favors the natural washing of the modules by rainwater. The difference that these factors bring, in addition to the improvement in energy generation, is a smaller amount of hotspots due to the reduction of the “dirt belt”, a strip of dust that normally accumulates near the frame of the lower part of the conventional photovoltaic module.
In Figure 3, it is possible to see the difference in dirt between a full-screen module and a conventional module. The tests were carried out in April in the Xixia district of Yinchuan, China, and the parameters used in the tests were:
- Fixed module installation angle: 5°
- Exposure to sunlight (pre-test): 60 Wh/m²
- Irradiation: 170,28 kWh/m²
As a result, the full-screen module generated 73,21 kWh of energy and had an accumulated energy generation per watt of 161,17 kWh/kW, while the mono-PERC half-cell module obtained values of 65,06 kWh and 144,54 kWh/kW respectively. So the comparison showed that the full-screen module was capable of generating 11,5% more energy compared to the mono-PERC half-cell module. Figure 4 illustrates this comparison graphically.
In addition to this comparison between the modules on energy generation, the issue of minimum and maximum power, average and performance per watt of both modules was compared, in different temperature and irradiance ranges, as the following tables illustrate.
References
- DAH Solar Full Screen photovoltaic modules – Helte
- Power Generation Increased By 11.5%! The Full-Screen PV Module Outdoor Field Test Report Published By TüV Nord (dahsolarpv.com)
This article was produced and adapted from technical materials provided by DAH Solar
Answers of 3
Without a doubt, it is the best option for customers with a roof with a low slope.
Honestly, Given Such a Positive Technical Differential in Electricity Generation, the Role of the Solar Module, in Addition to Certainly, Weight, What is the Reason for Manufacturing and Selling PV Modules with Frames?
Could They Claim, Risk of Impacts and Breakdown in Movement, from the Assembly of Large Solar Parks?
A Good Plastic Coating, Hard, with Good Thickness on the Sides, and Problem Solved.
Look, the Industry, Slept There, Huh!! Because Hot Spots, Especially, Are Serious, In Large Parks, Because They Cancel the Generation of Large Strings.
Emerson
Product manufactured in Brazil?