A Complete Guide To Bifacial Solar Panels

Bifacial solar panels have a transparent back sheet or glass layer that allows light to pass through and be reflected off the surface beneath the panel, such as the ground or a rooftop, which then allows the panel to capture more light and generate more electricity than a traditional panel.

Bifacial solar panels are especially useful in locations where sunlight is abundant and can be reflected off surfaces such as snow or water, or where there is a lot of diffuse light, such as on cloudy days or in areas with high albedo (reflective surfaces). They are commonly used in large-scale solar installations and can be mounted on the ground, rooftops, or in tracking systems to maximise their energy output.

Types of Bifacial solar panels

There are two main types of bifacial solar panels: glass-glass and glass-back sheets.

Glass-glass bifacial solar panels have a layer of glass on both sides of the panel, which protects the bifacial solar cell and enhances its durability. These panels can be frameless and have a higher efficiency rate than glass-back sheet panels.

Glass-back sheet bifacial solar panels have a transparent back sheet that allows light to pass through and be reflected off the surface beneath the panel, such as the ground or a rooftop. These panels are usually framed and have a lower efficiency rate than glass-glass panels.

In addition to these two types, there are also hybrid bifacial solar panels that combine the benefits of both glass-glass and glass-back sheet panels. These hybrid panels have a glass layer on the front side and a back sheet on the rear side, which enhances their durability and energy output.

Bifacial solar panels also come in different sizes and shapes, ranging from small residential panels to large commercial panels designed for utility-scale installations.

Bifacial Solar Panel Price List in India

Bifacial solar panels price is different across the country from region to region. Bifacial Solar Panels Price in India starts from ₹ 21,750. For accurate information on pricing, reach out to a reputable solar company such as Amplus Solar.

Bifacial Solar Panel working

Bifacial solar panels work by converting sunlight into electrical energy using photovoltaic cells that are mounted on both sides of the panel. When sunlight hits the front side of the panel, the photovoltaic cells absorb the light and generate an electrical current. The panel’s transparent backsheet or glass layer allows light to pass through and be reflected off the surface beneath the panel, such as the ground or a rooftop. The reflected light then hits the rear side of the panel, which also contains bifacial PV cells, and generates an additional electrical current.

The amount of electricity generated by bifacial solar panels depends on several factors, such as the intensity and direction of the sunlight, the angle and orientation of the panel, the efficiency and quality of the photovoltaic cells, and the weather conditions. Bifacial solar panels can be installed on the ground or on rooftops, and they can be mounted in fixed or tracking systems that follow the sun’s path throughout the day to maximise their energy output.

How are Bifacial Modules installed?

Bifacial solar panels can be installed using similar methods as traditional solar panels, but with some additional considerations due to their two-sided design. Here are some common installation methods for bifacial solar panels:

Ground-mounted: Bifacial solar panels can be mounted on the ground using racking systems that keep the panels at a certain angle and height above the ground. The racking system should be designed to allow light to reflect off the surface beneath the panel and reach the rear side of the panel. The panels can be fixed or installed in a tracking system that follows the sun’s path to maximise energy output.

Rooftop: Bifacial solar panels can also be installed on rooftops using either ballasted or anchored racking systems. The orientation and angle of the panels should be optimised to receive the maximum amount of sunlight and allow light to reflect off the roof surface and reach the rear side of the panel.

Floating: Bifacial solar panels can also be installed on water bodies, such as lakes or reservoirs, using floating racking systems. This allows the panels to capture sunlight from both sides and reflect off the water surface, increasing their energy output.

Bifacial Solar Panel Features

Here are some common features of bifacial solar panels:

Double-Sided Design: Bifacial solar panels have photovoltaic cells on both sides of the panel, allowing them to capture sunlight from both the front and rear sides. This increases their energy output and efficiency compared to traditional solar panels.

Transparent Backsheet or Glass Layer: The backsheet or glass layer of bifacial solar panels is transparent, allowing light to pass through and be reflected off the surface beneath the panel, such as the ground or a rooftop. This reflected light then hits the rear side of the panel, generating additional electrical current.

Cost-Effective: Although bifacial panels may be more expensive initially, their higher energy output and durability can result in a better return on investment over time. They can also help reduce energy costs and carbon footprint. 

Bifacial Solar Panel pros and cons

Bifacial solar panels offer several advantages and some disadvantages compared to traditional solar panels. 

Here are some pros of bifacial solar panels:

Higher Efficiency: Bifacial panels can generate more electricity than traditional solar panels due to their ability to capture and convert light from both sides. Studies have shown that they can increase energy output by up to 20-30% compared to single-sided panels.

Durability: Bifacial solar panels are made with durable materials such as tempered glass, which makes them more resistant to harsh weather conditions and environmental factors like hail, wind, and snow.

Versatility: Bifacial panels can be installed in various locations and configurations, such as on the ground, rooftops, or in tracking systems. They can also be used in both residential and commercial applications.

Increased ROI: Although bifacial solar panels may be more expensive initially, their higher energy output and durability can result in a better return on investment over time. They can also help reduce energy costs and carbon footprint.

Environmental Benefits: Bifacial solar panels produce clean, renewable energy without emitting greenhouse gases or pollutants, which helps reduce the carbon footprint and contribute to a more sustainable future.

Here are some disadvantages of bifacial solar panels:

Higher Cost: Bifacial solar panels are typically more expensive than traditional solar panels due to their double-sided design and specialised manufacturing process.

Installation Complexity: Bifacial solar panels require special mounting and installation techniques to capture light from both sides, which may require additional planning, equipment, and expertise.

Shading Issues: Bifacial solar panels may be more sensitive to shading and require careful placement and design to avoid any obstructions that could block sunlight from reaching both sides of the panel.

Limited Availability: Bifacial panels are not as widely available as traditional solar panels, which can limit options for buyers and installers.

Subsidies on Bifacial Solar Panels

In India, the government offers several financial incentives and policies to promote the adoption of solar energy, including bifacial solar panels. The National Portal for Rooftop Solar in India provides information about various government subsidy schemes that are available to encourage the installation of rooftop solar systems. These schemes are aimed at increasing the affordability and accessibility of solar energy systems for residential, commercial, and industrial consumers.

Subsidy for Residential Rooftop Solar Systems: The Ministry of New and Renewable Energy (MNRE) offers a subsidy of 40% of the benchmark cost of the solar system for residential consumers.

Net Metering: Net metering allows solar power producers to sell the excess power they generate back to the grid, offsetting their energy bills. Bifacial solar panels can benefit from this policy and generate additional revenue.

Maintenance of a Bifacial solar panel

Maintaining bifacial solar panels is similar to maintaining traditional solar panels. Here are some general maintenance tips for bifacial solar panels:

Regular Cleaning: Bifacial solar panels require regular cleaning to ensure maximum efficiency. Dirt, dust, and debris can accumulate on the surface of the panels, reducing the amount of sunlight they can absorb. Cleaning should be done carefully and with appropriate equipment to avoid damage to the panels.

Inspect for Damage: Regularly inspecting the panels for any cracks, chips, or other damage is crucial to maintain their performance. Any damage should be addressed immediately to prevent further deterioration and ensure safe and efficient operation.

Check for Shading: Bifacial solar panels are more sensitive to shading than traditional solar panels, so it’s essential to monitor the installation location to ensure there are no obstructions that could block sunlight from reaching both sides of the panel.

Monitoring System Performance: Monitoring the system’s performance regularly can help detect any issues and ensure that the panels are working correctly.

Hire a Professional: It’s recommended to hire a professional solar maintenance company such as Amplus to handle the maintenance of bifacial panels. They have the expertise and equipment needed to safely and efficiently maintain the panels.

Overall, bifacial solar panels require regular maintenance to ensure optimal performance and longevity. Following these tips and working with a professional solar maintenance company can help ensure the panels are functioning correctly and generating maximum energy output.

How to choose the best solar panel?

Choosing the best bifacial solar panel requires considering several factors, such as efficiency, durability, cost, and specific project requirements. Here are some tips to help you choose the best bifacial solar panel:

Efficiency: Bifacial solar panels are generally more efficient than traditional solar panels because they can generate electricity from both sides of the panel. Look for a bifacial solar panel with high efficiency ratings, such as modules with efficiency ratings of 20% or higher.

Durability: Consider the durability of bifacial solar panels, including their resistance to weather and environmental factors, such as wind, snow, and hail. Look for bifacial solar panels with a high snow and wind load rating, and a robust frame and glass.

Cost: The cost of bifacial solar panels can vary depending on the manufacturer and the quality of the module. Consider the overall cost of the bifacial solar panel, including the cost of installation, operation, and maintenance.

Manufacturer: Choose a reputable manufacturer with a proven track record of producing high-quality bifacial solar panels. Look for manufacturers with positive reviews and a strong reputation in the industry.

Warranty: Solar panel warranties typically cover defects, performance, and power output. Look for panels with longer warranties and coverage that is comprehensive enough to protect your investment. The warrantied lifespan of bifacial solar panels is 25-30 years or higher depending on your choice of the manufacturer and the location.

By considering these factors and consulting with a reputed solar energy professional like Amplus Solar, you can choose the best solar panel that meets your energy needs and budget while providing the highest performance and durability.

FAQs about Bifacial solar panel

Are bifacial solar panels more expensive than traditional solar panels?

Bifacial solar panels are generally more expensive than traditional solar panels, but their increased efficiency and energy yield can offset the higher initial cost over time. Additionally, as technology advances and production costs decrease, the price gap between bifacial and traditional solar panels is expected to narrow.

Can bifacial solar panels be used in residential applications?

Yes, they can be used in residential applications, but they may not be practical for all homes. Bifacial solar panels are best suited for homes with large roofs or plenty of open space for ground-mounted systems. Additionally, they may not be the best choice for homes with shading issues or limited sun exposure.

How are bifacial solar panels installed?

Bifacial solar panels can be installed using a variety of mounting systems, including fixed-tilt, single-axis, and dual-axis tracking systems. The installation process is similar to that of traditional solar panels, but special care should be taken to ensure that the panels are not shaded by nearby objects.

Can bifacial solar panels be used in all climates?

Yes, bifacial solar panels can be used in a wide range of climates, including hot and cold environments. However, their energy output may be reduced in areas with frequent cloud cover or shading.

What is the lifespan of bifacial solar panels?

The lifespan of bifacial solar panels is higher than that of traditional solar panels with a lifespan of 30 years and above up to 50 years. However, the actual lifespan may vary depending on factors such as weather conditions, maintenance, and usage.

Amplus Solar

May 10, 2023