#China #DMEGC Solar #Photovoltaic Modules #Jinhua #steel-frame

Introduction

DMEGC Solar, a renowned player in the solar energy sector, has recently launched a state-of-the-art series of photovoltaic modules. These innovative products feature a robust steel frame that distinguishes them from traditional aluminum frameworks, offering enhanced durability and a notable design upgrade. This significant change not only promises increased reliability but also improves the bifacial characteristics of the modules, which is a crucial aspect for maximizing energy output.

Technical Advancements

The transition from aluminum to steel in the construction of solar modules is propelled by various technical and ecological advantages. The specific steel used in these new modules displays an impressive yield strength that is nearly double that of standard aluminum alloys. This upgrade allows the modules to withstand extreme mechanical stresses, including snow loads of up to 6000 Pa and wind loads of 5000 Pa when properly installed. The implications of these enhancements ensure that the modules are not only more resilient but also last longer in various environmental conditions.

Thermal Expansion Comparison

One of the most notable improvements in reliability stems from the coefficient of thermal expansion (CTE) of the materials employed. With a CTE of 12 (10⁻⁶ m/K), the steel is much closer to that of glass (6.9) than aluminum (23). This compatibility suggests that the steel-framed modules will experience significantly less environmental stress over their lifespan, thereby reducing the risk of micro-cracking compared to aluminum-framed modules. The reduction in such defects is vital for maintaining the efficiency of solar panels over time.

Innovative Cross-Section Design

At the heart of this new product launch is DMEGC Solar's unique cross-sectional design, which marks a significant departure from traditional flat-frame designs. The innovative “S-shaped” cross-section has been engineered to minimize vertical shading on the rear side of the module by 76%. Consequently, this design increases the unshaded area on the module's back by 3.6%, effectively boosting the bifaciality factor by an estimated 2.8%. In combination with advanced cell technologies and an anti-reflective coating (ARC) on the rear glass, these modules are capable of achieving a bifaciality factor of up to 85%.

Energy Generation Efficiency

According to DMEGC's yield simulations, this bifaciality factor translates into an annual energy generation of 2078 kWh/kWp/year. This figure represents a 0.6% increase in revenue from electricity generated compared to conventional modules. As a result, project developers can anticipate an increased financial return from their solar investments, making this innovation a highly attractive option in the market.

Addressing Corrosion Concerns

To quell concerns regarding steel corrosion, DMEGC Solar employs a Zn-Al-Mg coated steel (ZAM). This specially formulated coating provides exceptional resistance against environmental influences, ensuring the longevity of the modules. Additionally, thorough independent tests have confirmed the modules' resilience to saline and ammonia environments, further attesting to their durability and suitability for various installation locations.

Conclusion

DMEGC Solar’s entry into the market with its advanced steel-frame photovoltaic modules heralds a new era for solar technology. These modules not only exhibit improved structural integrity and reliability but also demonstrate a commitment to innovation that can enhance energy output while addressing environmental concerns. As the industry shifts towards more sustainable materials and designs, DMEGC is poised to make a significant impact in the solar energy landscape.