Double Glass

What are Dual Glass Solar Panels?

Dual Glass, aka. Double Glass Solar Panels are frameless solar panels that have glass in the front & glass at the back without using any aluminum frame to support it which gives the solar panel a window glass-like shape. This type of solar panel is a good option for being stacked together for different applications due to its thin thickness which eliminates the problem faced by aluminum frame solar panels.

Double Glass Solar Panels were introduced as a possible solar panel in 2012 but by the first quarter of 2013, they started to be mass-produced by several solar manufacturing companies.

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Advantages of Dual Glass Solar Panels

  • 1-Durability: Double Glass Solar Panels are more durable than other types of aluminum frame solar panels as they can withstand more mechanical damage & harsh conditions.
  • 2-Service Life: Double Glass Solar Panels have increased the service life of solar panels since it was introduced by 5 years extra being 30 years instead of 25 years.
  • 3-Strength: Double Glass Solar Panels have increased strength for temperature & extreme natural disaster conditions that can break any other type of solar panels making them preferable for high-temperature applications.

Disadvantages of Dual Glass Solar Panels

  • 1-Weight: Double Glass Solar Panels have a heavier weight than other types of solar panels by almost 6kg for an average solar panel of 390w to 400w. Making it harder to lift & need special equipment to handle the right way.
  • 2-Mounting: Double Glass Solar Panels need special mounting because if normal mounting is used it can break the glass from two sides. It should be mounted with screws that have rubber pushers to secure the glass without damaging the panels.

What are the use cases of Double Glass Solar Panels?

Double glass solar panels have an extra layer of tempered glass that can protect the solar cells from harsh weather conditions and increase the lifespan of the panels. Here are some situations where double glass solar panels can be uniquely useful:
  • Parking sheds: Parking sheds are made to block direct sunlight to be exposed. Therefore, Double Glass Solar Panels are a good option to let some sunlight in but not too much to heat up the cars.
  • Landscape roofs: In landscape roofs, it is forbidden to cover the natural sky look therefore they use glass buildings in such areas making Double Glass Solar Panels merge with such areas without appearing odd.
  • Coastal areas - Double glass solar panels are resistant to salty air and harsh weather conditions, making them ideal for coastal areas. They can withstand strong winds, heavy rains, and other natural elements that can damage regular solar panels.
  • Rooftops - Double glass solar panels can be installed on rooftops without worrying about the weight of the panels. They are lightweight and don't require any additional support structures.
  • Greenhouses - Double glass solar panels can be installed on the roof of a greenhouse to provide electricity and create a shaded area for plants. They can also help regulate the temperature inside the greenhouse and protect the plants from direct sunlight.
  • Walkways - Double glass solar panels can be used to create a walkway that generates electricity. They can be installed on the ground or on top of a roof to provide power to nearby buildings.
  • Off-grid locations - Double glass solar panels can be useful in off-grid locations where there is no access to electricity. They can be used to power small cabins, boats, and RVs without too much support.
In summary, double glass solar panels are useful in situations where durability, efficiency, and aesthetic appeal are important. They can be used in coastal areas, on rooftops, in greenhouses, for walkways, and in off-grid locations.  

What is Double Glass?

Double Glass solar panels, as the name suggests, are photovoltaic modules designed with two layers of glass instead of the traditional single layer of tempered glass that is commonly used in conventional solar panels. This innovative design replaces the rear sheet used in standard panels with an additional layer of glass, offering numerous advantages and improved durability. Let's delve deeper into the benefits and advantages of this groundbreaking technology.

Benefits and Advantages of Double Glass Solar Panels

Double Glass solar panels have gained immense popularity in the solar industry due to their outstanding features and benefits. Here are some key advantages that make them a compelling choice for solar installations:
  • Enhanced Durability: The double glass construction provides superior protection against environmental factors, such as extreme weather conditions, humidity, and corrosion, making them more robust and long-lasting.
  • Improved Resistance: Double Glass panels are less susceptible to microcracks and delamination, ensuring that they continue to perform efficiently over their entire lifespan.
  • Better Aesthetics: With their frameless design and elegant appearance, Double Glass panels can be seamlessly integrated into various architectural settings, offering a more appealing visual appeal.
  • Increased Efficiency: These panels often have a higher light transmission rate and improved performance in low-light conditions, resulting in increased energy production over time.
  • Reduced Degradation: Double Glass panels typically exhibit slower degradation rates compared to standard panels, maintaining their efficiency for a more extended period.
  • Minimal Maintenance: Due to their robust construction, these panels require less maintenance, reducing the overall cost of ownership for solar installations.
  • Longer Warranty: Many manufacturers offer extended warranties for Double Glass panels, reflecting their confidence in the durability and performance of these modules.

Techniques Employed by Solar Manufacturers

Manufacturers of Double Glass solar panels employ a variety of specialized techniques to ensure the creation of modules that are not only efficient but also exceptionally durable. Let's delve into these techniques in greater detail:

Lamination Process:

The core technique behind Double Glass panels is the lamination process. This involves sandwiching the solar cells between two layers of glass, creating a robust and sealed unit. The lamination process consists of the following key steps:
  • Solar Cell Placement: Photovoltaic cells are precisely placed on one of the glass sheets. These cells are typically made of silicon and are responsible for converting sunlight into electricity.
  • Encapsulation Layer Application: A thin layer of encapsulation material, such as ethylene vinyl acetate (EVA), is applied to the solar cells. EVA is chosen for its excellent adhesive properties, weather resistance, and ability to protect the cells from potential damage.
  • Second Glass Layer Placement: After applying the encapsulation material, the second glass layer is carefully positioned on top, creating a sandwich-like structure. This sealing layer is crucial for the protection of the solar cells from external elements.
  • Heat and Pressure Application: The assembled layers undergo a heat and pressure treatment within a lamination oven. This process effectively bonds the layers together, ensuring the elimination of air gaps and enhancing the structural integrity of the panel.

Quality Control:

Stringent quality control measures are an integral part of the manufacturing process for Double Glass solar panels. These measures are designed to ensure that the panels meet industry standards and specifications. The quality control process includes:
  • Electrical Performance Testing: Each panel is subjected to electrical testing to verify that it meets its rated power output. This testing involves checking parameters such as voltage, current, and electrical resistance.
  • Visual Inspections: Panels are visually inspected for any imperfections, such as scratches, chips, or defects in the encapsulation layer. Aesthetics are also evaluated to ensure that the panel's appearance aligns with its intended design.
  • Durability Tests: Panels are subjected to various durability tests, including exposure to extreme temperatures, humidity, and weather conditions. This assesses their ability to withstand harsh environmental factors over their lifespan.
  • Certifications: Many Double Glass panels undergo third-party certification by organizations like TÜV Rheinland or the International Electrotechnical Commission (IEC). These certifications confirm that the panels meet specific industry standards and performance criteria.

Encapsulation Materials:

The choice of encapsulation materials plays a crucial role in the performance and durability of Double Glass solar panels. Besides EVA, other materials may be used for this purpose, such as thermoplastic encapsulants or back sheets. The encapsulation materials are selected for their ability to provide:
  • Effective Sealing: The materials must create a hermetic seal around the solar cells to protect them from moisture, dust, and other environmental contaminants.
  • Enhanced Light Transmission: Encapsulation materials are designed to maximize light transmission, ensuring that a greater percentage of sunlight reaches the solar cells, thereby improving panel efficiency.
  • Long-Term Adhesion: The encapsulation materials must maintain strong adhesion between the glass layers and solar cells, preventing delamination or the separation of layers over time.

Frameless Design:

Double Glass panels often feature a frameless design, eliminating the need for traditional aluminum frames that are commonly found on standard panels. This design choice offers several advantages:
  • Aesthetics: The frameless design provides a sleek and modern appearance, making Double Glass panels well-suited for architectural integration and aesthetic applications.
  • Corrosion Resistance: The absence of aluminum frames reduces the risk of corrosion, ensuring that the panels maintain their visual appeal over the long term.
  • Reduced Weight: Frameless Double Glass panels tend to be lighter, making them easier to handle during installation and reducing the load on mounting systems.
  • Enhanced Durability: The frameless design, combined with the lamination process, contributes to the overall durability of the panels, making them more resistant to harsh weather conditions.
The techniques employed by solar manufacturers in crafting Double Glass solar panels are designed to ensure that these modules meet and exceed industry standards for performance and durability. The lamination process, quality control measures, choice of encapsulation materials, and frameless design all contribute to the creation of solar panels that are not only more resilient but also aesthetically pleasing. Manufacturers continually invest in research and development to refine these techniques, further advancing the quality and efficiency of Double Glass solar panels in the ever-evolving solar industry.

Applications of Double Glass Solar Panels

Double Glass solar panels have found applications in a wide range of solar projects due to their exceptional qualities. Here are some of the key areas where these panels can make a significant impact:
  • Residential Installations: Homeowners can benefit from Double Glass panels by enjoying increased energy production, better aesthetics, and a longer-lasting solar solution.
  • Commercial Installations: Businesses can take advantage of the enhanced durability and low maintenance requirements of Double Glass panels, which can lead to reduced operational costs.
  • Agricultural and Rural Projects: In remote areas and agricultural settings, Double Glass panels offer a reliable and long-lasting energy source, with reduced susceptibility to harsh environmental conditions.
  • Utility-Scale Solar Farms: Double Glass panels have gained popularity in utility-scale solar projects due to their ability to withstand extreme weather and environmental conditions, ultimately improving the overall return on investment.
  • Architectural Integration: The frameless design of Double Glass panels allows for creative architectural integration, making them suitable for building-integrated photovoltaics (BIPV) and various aesthetic applications.

How to Check for the Double Glass Feature

Verifying whether a solar panel features the Double Glass technology is essential to make informed decisions during the procurement and installation processes. Here are steps to check if a panel possesses this feature:
  • Manufacturer's Specifications: The most reliable source of information is the manufacturer's specifications and product datasheet. Look for references to "Double Glass" or "Bifacial" in the panel's description.
  • Visual Inspection: Examine the panel closely. Double Glass panels typically have a frameless design and may have a slight gap between the layers of glass, making it visually distinguishable from standard panels.
  • Inquire with the Supplier: If you're uncertain about the panel's features, consult with the supplier or manufacturer. They can provide detailed information about the product and confirm whether it is a Double Glass panel.
  • Third-Party Certification: Some panels may carry third-party certifications indicating their features and specifications. Look for certifications from organizations like TÜV Rheinland or the International Electrotechnical Commission (IEC).
Double Glass solar panels represent a significant advancement in solar technology, offering a range of benefits and advantages that cater to the diverse needs of solar installers, procurement managers, and EPC professionals. Their enhanced durability, improved resistance to environmental factors, and versatile applications make them a compelling choice for a wide range of solar projects. By understanding the techniques employed in their manufacture and how to verify their presence, you can make well-informed decisions when integrating this innovative technology into your solar installations. Double Glass solar panels are not just a trend; they are a sustainable solution for the future of solar energy production.

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