Half cut solar cells technology for solar panels


Welcome to Bonjour Solar, your ultimate guide to the world of solar energy and the latest advancements in solar panel technology. In this comprehensive article, we will delve into the fascinating world of half-cut solar panels and explore how they are revolutionizing the solar industry.

How Do Half-Cut Solar Panels Work?

Half-cut solar panels, pioneered by REC Solar in 2014, have been designed to maximize the energy output of solar panels. These innovative panels are essentially two separate panels in one, and we will explain how they achieve this remarkable feat.

Traditional monocrystalline solar panels typically consist of 60 to 72 solar cells. In half-cut panels, these cells are cut in half, effectively doubling the number of cells on the panel. This increase in cell count allows for higher energy production.

The key to the design of half-cut solar panels lies in their unique wiring system. The panel is split in half, with the top and bottom portions operating independently. This means that even if one half of the panel is shaded or experiences reduced sunlight, the other half continues to generate energy.

To achieve this, a different method of “series wiring” is employed for half-cut panels. A bypass diode within the panel carries the electricity generated by the cells to the junction box. In traditional panels, if one cell is shaded or faulty, the entire row within the series wiring stops producing power. However, in a half-cut panel, only the row with the shaded cell stops producing power, while the other rows continue to generate energy. This results in improved performance and higher energy output.

Advantages of Half-Cut Solar Panels

Half-cut solar panels offer numerous advantages over traditional panels, making them an attractive choice for homeowners and businesses alike. Let’s explore some of these benefits:

1. Higher Shade Tolerance

One of the major advantages of half-cut solar panels is their higher shade tolerance. In traditional panels, if a portion of the panel is shaded, the entire panel’s energy production is affected. However, with half-cut panels, the independent operation of the top and bottom halves ensures that energy continues to be generated even if one half is shaded. This makes half-cut panels ideal for installations in areas with partial shade, such as rooftops with nearby trees or buildings.

2. Increased Power Output

Due to their higher cell count and improved wiring system, half-cut solar panels typically offer a higher wattage than traditional panels. This means that they can generate more power per square foot, maximizing the energy production potential of your solar installation. For example, the REC Alpha half-cut panel can reach wattages of up to 380 watts, compared to the typical 250-watt range of traditional panels.

3. Reduced Hot Spot Effects

Hot spots occur when excess heat is concentrated in certain areas of a solar panel. This can lead to reduced performance and potential damage to the panel. With half-cut solar panels, the increased number of cells allows for better heat dissipation. The excess heat is spread across a larger surface area, reducing the impact of hot spots and increasing the overall durability of the panel.

4. Lower Power Loss

Internal resistance within solar panels can lead to power loss during the transmission of electricity. However, the design of half-cut solar panels helps to minimize this issue. By halving the cells and reducing the current generated by each cell, resistive losses are significantly reduced. This results in improved energy efficiency and higher overall performance.

5. Future Potential

While half-cut solar panels offer significant advantages, their manufacturing process is more complex and costly compared to traditional panels. As a result, they are currently more expensive to produce. However, as technology advances and the manufacturing process becomes more streamlined, it is expected that the cost of half-cut panels will decrease, making them more accessible to a wider market.

The Future of Half-Cut Solar Panels

Half-cut solar panels present a significant advancement in solar panel technology, offering improved performance and higher energy yields. While they currently have higher manufacturing costs, their advantages make them an appealing choice for certain applications.

As technology continues to evolve, it is likely that the manufacturing process for half-cut solar panels will become more streamlined and cost-effective. This could lead to wider adoption and increased affordability, making half-cut panels a standard choice for solar installations in the future.

However, it is important to note that traditional solar panels still work effectively for many installations. If your roof receives ample sunlight throughout the day and space is not a constraint, traditional panels may be a suitable and cost-effective option.

Ultimately, the decision to choose half-cut solar panels should be based on your specific energy needs, available space, and budget. Consulting with a solar installer will help you make an informed decision and determine the best solution for your solar energy requirements.


In conclusion, half-cut solar panels have revolutionized the solar industry by offering higher energy output, improved shade tolerance, and enhanced performance. Their unique design, with independent top and bottom halves, allows for continued energy production even in partially shaded conditions.

While half-cut solar panels are currently more expensive to manufacture, their advantages make them an attractive choice for those seeking maximum energy yield from a limited space. As technology advances and manufacturing costs decrease, half-cut panels have the potential to become more widespread and affordable.

At Bonjour Solar, we are committed to providing you with the latest insights and information on solar energy. Visit our website at www.bonjoursolar.com for additional resources and expert advice on solar panel technology, installation, and renewable energy solutions. Embrace the power of the sun with Bonjour Solar, your trusted partner in the world of solar energy.