Bifacial solar panels are an advanced type of photovoltaic panel that can capture sunlight from both their front and rear sides. This dual-sided capability allows them to produce more energy compared to traditional monofacial panels. Here’s an overview of their features, benefits, and applications:
Key Features
Dual-Sided Energy Capture:
Front Side: The primary side facing the sun, similar to traditional panels.
Rear Side: Captures reflected sunlight from the ground and other surfaces.
Increased Efficiency:
Bifacial panels can increase overall energy yield by 10-30% depending on the albedo effect (reflectivity of the ground surface) and installation setup.
Durable Construction:
Often made with tempered glass on both sides, providing enhanced durability and resistance to environmental stressors.
Higher Energy Yield:
Better performance in diffused light conditions, such as on cloudy days or at dawn and dusk.
Longer Lifespan:
Enhanced build quality often leads to longer warranties and lifespans.
Installation Considerations
Mounting:
Bifacial panels can be installed on ground mounts, rooftops, or as part of solar tracking systems. Elevated mounts or tracking systems can optimize the amount of light hitting both sides.
Ground Reflectivity:
The type of surface below the panel affects performance. Light-colored or reflective surfaces like white gravel, sand, or specialized coatings can enhance the rear-side energy capture.
Tilt and Spacing:
Proper tilt angle and spacing between panels are crucial to avoid shading and maximize the albedo effect.
Applications
Commercial and Utility-Scale Installations:
Ideal for large solar farms where space and reflectivity can be optimized for maximum output.
Rooftop Systems:
Suitable for flat or slightly tilted roofs, especially with reflective surfaces.
Agrivoltaics:
Integration with agricultural practices, allowing sunlight to pass through and support crop growth while generating power.
Solar Carports and Canopies:
Provides shading for vehicles while generating extra power from the reflected light off the pavement.
Example Products
LG NeON 2 BiFacial: Known for high efficiency and robust design, suitable for various applications.
LONGi Bifacial Solar Panels: Offers competitive pricing and high performance, often used in large-scale installations.
Trina Solar DUOMAX Twin: Durable with dual glass design, offering high energy yield and reliability.
Benefits
Higher Energy Output:
The ability to capture light from both sides increases the overall power generation, making them more cost-effective over time.
Improved Performance in Low Light:
Better efficiency in diffused and low light conditions compared to traditional panels.
Aesthetic and Functional Versatility:
Can be used in more visually appealing applications like building facades and architectural integrations.
Long-Term Cost Savings:
Higher initial investment can be offset by increased energy production and longer lifespans.
Conclusion
Bifacial solar panels represent a significant advancement in solar technology, offering increased efficiency and versatility for a wide range of applications. By capturing sunlight from both sides, they provide a higher energy yield and better performance in various environmental conditions, making them an attractive option for both commercial and residential solar installations. Proper installation and optimization of ground reflectivity are key to maximizing their benefits.