Product Description: LONGi LR7-72HVH 645M Solar Panel
The LONGi LR7-72HVH 645M is a state-of-the-art solar panel engineered for maximum performance, reliability, and efficiency in commercial and industrial solar installations. With a powerful maximum power output of 645 watts and an outstanding module efficiency of 23.9%, this panel offers an excellent balance between energy production and space utilization.
High Power Output and Superior Efficiency
The LR7-72HVH 645M is designed to deliver 645W under standard test conditions (STC), positioning it among the top tier of high-capacity solar modules on the market. Its high module efficiency of 23.9% is achieved through the innovative use of BC-Cell (Back Contact) technology, which moves the electrical contacts to the back of the solar cells. This reduces shading on the front surface, allowing more sunlight to be absorbed and converted into electricity.
This efficiency ensures that solar system designers can maximize energy harvest even in installations with limited roof or ground space, making the LR7-72HVH 645M ideal for commercial rooftop arrays and utility-scale solar farms.
Advanced BC-Cell Back Contact Technology
At the core of the LR7-72HVH 645M lies BC-Cell technology, which enhances power generation by reducing shading losses and improving cell interconnections. The back contact design not only improves the aesthetic appeal of the solar cells by eliminating front-side busbars but also enhances the module’s temperature stability, lowering operating temperature and improving overall energy yield.
This innovative design leads to lower operating temperatures, which translates into better performance on hot days and increased durability over the panel’s lifespan.
Premium Quality Materials and Manufacturing Excellence
Manufactured under LONGi’s strict quality control and smart manufacturing standards, the LR7-72HVH 645M uses premium TaiRay wafers known for their excellent crystalline structure and superior electrical properties. The combination of TaiRay wafers and BC-Cell technology guarantees high product reliability and longevity.
The solar panel features a robust anodized aluminum alloy frame paired with 3.2 mm thick coated tempered glass. This combination ensures resistance to harsh environmental factors, such as wind loads, heavy snow, and hail impacts (tested to withstand 25mm hailstones at 23 m/s speed), providing confidence for installations in challenging climates.
Mechanical and Physical Specifications
The LR7-72HVH 645M measures 2382 × 1134 × 30 mm and weighs 28.5 kg, offering an optimal balance of size, weight, and durability. Its IP68-rated junction box includes three bypass diodes to reduce hotspot effects and optimize energy output under partial shading conditions.
The module’s frame design and packaging support easy transport and quick installation. Each pallet contains 36 pieces, with 144 modules fitting into a 20-foot container and 720 modules per 40-foot high cube container, facilitating efficient logistics for large-scale solar projects.
Industry-Leading Certifications and Warranty
LONGi prioritizes quality and safety, equipping the LR7-72HVH 645M with comprehensive certifications such as IEC 61215, IEC 61730, and UL 61730. The manufacturing process aligns with international standards including ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health and Safety).
Backing its products with confidence, LONGi offers a 15-year warranty covering materials and workmanship, alongside a 30-year linear power output warranty. The annual power degradation rate is less than 0.35% after the first year, assuring customers of long-term energy production and return on investment.
Thermal and Electrical Performance
The solar panel performs reliably in extreme temperature ranges from -40°C to +85°C, with a nominal operating cell temperature (NOCT) of 45 ± 2°C. Its temperature coefficients indicate minimal loss of power output with increasing temperature: -0.26% per °C for maximum power, -0.20% per °C for open circuit voltage, and a slight positive effect (+0.05% per °C) on short circuit current.
This ensures steady energy generation even in hot climates, making the LR7-72HVH 645M suitable for installations in deserts, tropical regions, or other temperature-intensive environments.
Bifacial Capability for Enhanced Energy Capture
The LR7-72HVH 645M employs bifacial technology, which allows it to capture sunlight from both its front and rear surfaces. When installed on reflective surfaces or elevated mounting systems, this bifacial design can boost total energy output by up to 25%, significantly improving system efficiency and lowering the cost per watt of solar electricity.
Flexible Installation and System Compatibility
Designed for compatibility with modern PV systems, the LR7-72HVH 645M supports a maximum system voltage of 1500 V DC and a maximum series fuse rating of 25 A. Its output cables (typically 4mm²) can be customized in length to accommodate diverse installation needs.
The module’s robust design, coupled with smart electrical configuration, allows for larger system strings and fewer balance-of-system components, optimizing the overall cost-efficiency and reducing installation complexity.
Commitment to Sustainability
LONGi’s solar panels are produced with sustainability at their core. The LR7-72HVH 645M is manufactured in ISO 14001 certified factories, emphasizing environmentally responsible production practices. Its high efficiency and long service life contribute to reducing carbon footprints and promoting global renewable energy adoption.
Summary
The LONGi LR7-72HVH 645M solar panel is an ideal solution for commercial and industrial solar power projects requiring high efficiency, durability, and reliable performance. With its 645-watt output, 23.9% efficiency, and advanced BC-Cell back contact technology, this panel delivers superior energy production and long-term value. Certified for safety and quality, supported by industry-leading warranties, and designed for thermal and environmental resilience, the LR7-72HVH 645M sets a new standard in solar technology for sustainable energy generation.