Product Description: LONGi LR7-72HVH 640M Solar Panel

The LONGi LR7-72HVH 640M solar panel is a high-performance, next-generation photovoltaic module designed for commercial and industrial solar power systems. With a remarkable maximum power output of 640 watts and an impressive module efficiency of 23.7%, it delivers exceptional energy generation while maintaining a sleek and durable design.

Exceptional Power and Efficiency

The LR7-72HVH 640M achieves 640W power under standard test conditions (STC), making it a powerful choice for maximizing energy yield. Its 23.7% efficiency is powered by advanced BC-Cell (Back Contact) technology, which strategically places electrical contacts on the rear side of the cells. This design significantly reduces shading and electrical losses, enabling more sunlight to be converted into usable electricity.

This innovative technology ensures that solar installations using the 640M model can produce more energy per square meter compared to traditional solar panels, making it ideal for projects with space limitations or those aiming to maximize output.

Cutting-Edge Cell and Wafer Technology

The panel incorporates high-quality TaiRay wafers combined with BC-Cell technology. TaiRay wafers are known for their excellent crystallinity and electrical properties, enhancing electron flow and minimizing energy loss. The back contact cell design further improves the module’s power output, especially in challenging lighting conditions such as early morning, late afternoon, and cloudy weather.

This synergy results in a solar panel that performs reliably throughout the day and across various climates, maintaining a strong output even under elevated temperatures.

Robust Mechanical and Structural Design

Constructed with a 3.2mm thick coated tempered glass, the LR7-72HVH 640M is engineered for durability against environmental hazards such as hail, strong winds, and heavy snow loads. The anodized aluminum alloy frame provides structural strength and corrosion resistance, ensuring the panel’s longevity over decades of outdoor exposure.

The module dimensions are 2382 × 1134 × 30 mm, weighing 28.5 kg, providing a lightweight yet mechanically robust solution that simplifies transport and installation on a variety of mounting systems.

Comprehensive Quality Certifications and Long-Term Warranty

LONGi’s LR7-72HVH 640M solar panel meets rigorous international standards, including IEC 61215 and IEC 61730 for product safety and performance. It is also UL 61730 certified and produced under ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health and Safety) certified facilities, guaranteeing premium product quality and environmentally responsible manufacturing.

LONGi backs this panel with a 15-year warranty on materials and workmanship and a 30-year linear warranty on power output, with annual degradation limited to 0.35% after the first year. This robust warranty reflects LONGi’s confidence in the durability and longevity of its solar modules.

Enhanced Operating Characteristics and Thermal Stability

The LR7-72HVH 640M operates efficiently in temperatures ranging from -40°C to +85°C, with a nominal operating cell temperature (NOCT) of around 45±2°C. Its temperature coefficients include +0.05%/°C for short-circuit current (Isc), -0.20%/°C for open-circuit voltage (Voc), and -0.26%/°C for maximum power (Pmax), ensuring stable performance across temperature fluctuations.

These characteristics allow the module to sustain high power output even during hot weather, making it suitable for installation in regions with intense sunlight and elevated ambient temperatures.

Bifacial Technology for Increased Energy Yield

Equipped with bifacial cell technology, the LR7-72HVH 640M captures sunlight from both the front and rear surfaces. This results in increased total energy generation, especially when installed over reflective surfaces like white rooftops or light-colored ground, potentially boosting power output by up to 25%.

This feature enhances overall system efficiency and reduces the levelized cost of energy (LCOE), contributing to quicker return on investment and greater environmental benefits.

Installation and System Compatibility

This solar panel comes with an IP68-rated junction box equipped with three bypass diodes to minimize the effects of shading and prevent hotspot damage. The standard output cable (typically 4mm²) can be customized in length to accommodate diverse installation scenarios.

The panel supports a maximum system voltage of 1500 V DC and a maximum series fuse rating of 25 A, allowing designers to create large-scale solar arrays with fewer strings and reduced wiring costs.

Commitment to Sustainability

Produced with LONGi’s stringent environmental standards, the LR7-72HVH 640M is manufactured in ISO 14001 certified facilities. The panel is designed to minimize its carbon footprint and environmental impact while helping customers harness clean, renewable energy for a sustainable future.

Summary

The LONGi LR7-72HVH 640M solar panel offers a perfect balance of power, efficiency, and reliability for demanding solar projects. Its 640-watt output and 23.7% efficiency are powered by advanced BC-Cell back contact technology and TaiRay wafer quality, delivering superior energy yield and durability. With comprehensive certifications, a strong warranty, and bifacial technology, this solar module stands out as a top-tier choice for commercial and industrial applications seeking high performance and long-term value.

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