Study points to tilt angle as a critical factor for dust losses

A study by scientists at Northeast China Electric Power University (NEEPU) has provided new evidence on the impacts of dirt on the performance of photovoltaic modules. The research evaluated variables such as irradiance intensity, dust density and tilt angle, and concluded that the accumulation of dirt on the panels significantly compromises power generation – especially when the modules are installed at a lower tilt.

The researchers created a mathematical model to predict maximum power losses based on these three factors. Among them, the tilt angle was identified as the element with the greatest influence on the performance drop, followed by solar irradiance and, lastly, the density of deposited dust.

According to scientists, the more inclined the module, the smaller the impact of dirt, thanks to the greater propensity for natural water drainage and the sliding of dust particles. Based on the study's conclusions, technological solutions that minimize dirt accumulation become even more relevant – especially in environments with high levels of air pollution or low cleaning frequency.

Access the complete research from Northeast China Electric Power University.

DAH Solar Full-Screen® Technology

In that context, the photovoltaic modules with Full-Screen technology® modules developed by DAH Solar are a practical and efficient response to the limitations imposed by dirt. Unlike conventional panels, Full-Screen® modules do not have a visible frame on the front, which prevents dust from accumulating on the edges – one of the main causes of partial shading and hot spot failures.

Thanks to its flat and continuous structure, rainwater runs off more evenly, promoting a self-cleaning effect that reduces the need for manual maintenance and maintains the system's energy efficiency for longer.

DAH Solar targets 1 million sales in Brazil by 2025

This advantage was proven in the field by tests carried out by TÜV Nord, who compared a 460 W full-screen module from DAH Solar to a conventional half-cell mono-PERC panel with the same dimensions. The result showed that the full-screen model had 11,5% higher generation – a gain directly related to the lower interference of dirt on the surface of the module.

The manufacturer estimates that, under real operating conditions, panels with Full-Screen® technology can offer energy production between 6% and 15% higher than traditional modules. This represents an important competitive advantage for large-scale projects or in regions with a higher incidence of dust, acid rain or industrial pollution.

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Know the effects of dirt on photovoltaic modules

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