Traditional crystalline silicon solar cells can now be made in a new and better way using half-cut solar cell technology. This promising technology reduces some essential power losses in standard PV modules. This improves the performance of both the solar panels and the PV system.

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Half-cut solar cells have a lot of great benefits compared to standard modules. They don’t have any significant drawbacks. This article will discuss how half-cut solar cell technology works and its benefits.

What’s that?

Traditional solar cells have been cut in half with a laser cutter to make half-cell solar panels. A standard module has 60 or 72 cells, but a half-cell module has 120 or 144 cells, which is twice as many as a standard module. It’s the same size as a regular cell module, but the cells are only half as long. By doubling the number of cells, technology makes it possible to get more energy from the sun and send it to the inverter.

How do solar cells that are half-cut work?

Cutting the size of solar cells in half allows for a greater density of cells on a panel, which is the goal of half-cut solar cell technology. This makes solar panels produce more energy. The panel is then cut in half so the top can work separately from the bottom. This means more energy is made, even if half of the panel is in the shade.

That’s the big picture. Below, we’ll break down the steps.

Traditional monocrystalline solar panels usually have 60 to 72 solar cells, so when those cells are cut in half, the number of cells goes up. Most half-cut panels are made with PERC technology, making the modules more efficient, with 120 to 144 cells.

A laser is used to cut the cells in half in a prudent way. The amount of current flowing through them is cut in half by cutting these cells in half. This means that the resistance to the flow of energy through the current is reduced, which leads to better performance.

Since the solar cells are cut in half, they are smaller, and there are more on the panel than on a normal panel. The panel is then cut in half so that the top and bottom parts work as two separate panels and still make energy even when one half is in the shade.

Modifying the “series wiring” of the panel, the method by which solar cells are connected and transmit electricity through a bypass diode is essential to the success of half-cut cell design. The red line in the images below shows where the bypass diode takes the electricity from the cells to the junction box.

In a traditional panel, if one cell is shaded or broken and can’t process energy, the whole row will stop making power because it is wired in series.

Half-cell solar modules have their good points

Putting these cells in photovoltaic solar panels can make them produce more solar energy. A half-cut solar module has many advantages over traditional solar panels. 

Reduced hot spots and overall temperature

When only some sun shines on solar panels, it causes hot spots. When some cells are in the shade, they stop producing power and act as resistances, using electricity and increasing the cell temperature. Limiting the current flow through each substring, the solar cells help keep localized areas from getting too hot. 

When a PV module is partly shaded, both the module and the array lose a lot of power. Half-cut solar cells have twice as many substrings, so shading a single panel area will cause less energy to be lost. The loss of energy from a solar array made up of panels with one-half cutaway has been shown in studies to be as low as 50%.

Reduced hot spots and overall temperature

When only some sun shines on solar panels, it causes hot spots. When some cells are in the shade, they stop producing power and act as resistances, using electricity and increasing the cell temperature. Cutting solar cells in half reduces the current per substring and thus cools localized hotspots. Up to 20 degrees Celsius can be removed from the peak temperature of hot spots with this technology.

Higher power from cell to module

A solar cell’s conversion efficiency can vary widely between different technologies, even among identical cells. However, half-cut solar cells have a higher Cell-to-Module power (CTM), producing more energy. For comparison, the CTM power of conventional PV modules is only 94.8%. In contrast, the CTM power of half-cut solar cells is 99.4% (before laser-cut losses are considered) and 98.4% (after losses are considered).

Integration with different types of solar cells

The traditional c-Si technology is still used to make solar cells, but the half-cut solar cell technology changes how PV modules are completed. Because of this, these solar panels can be made with PERC and bifacial technologies. This can lead to PV modules with less power loss, a higher power output, and other benefits.

Conclusion

When making half-cut cells is more streamlined and easier to use, they will become cheaper and more common. Inquire with your solar contractor about using partial cells in your rooftop installation.

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Description

Key features

Longi 585W Solar Panel 144 Cells Longi 585W solar panel series is a high-performance module that offers numerous advantages for solar energy systems.

With a power output of 585 watts, it provides excellent efficiency and power generation capacity.

Technical Data Sheet PD

ELECTRICAL CHARACTERISTICS IN STC

• Maximum power: 585 W
• Open circuit voltage: 52.21V
• Short circuit current: 14.14A
• Voltage at full power: 44.06 V
• Current at maximum power: 13.17 A
• Module efficiency: 22.30
• Operating temperature: -40ºC to +85ºC
• Maximum system voltage: VDC
• UL type 1 or 2
  IEC Class C
• Maximum series fuse rating: 25A

MECHANICAL CHARACTERISTICS

• Number of cells: 144 (6×24)
• Module dimensions: ××35mm
• weight: 27.50kg

One of the main advantages of the 585W panel is its high power density, which means that it can deliver a greater amount of electricity per unit area. This allows energy production to be maximized in limited installation spaces.

Additionally, the panel features a high conversion efficiency, ensuring optimal conversion of sunlight energy into usable electricity.

The Longi 585W 144 Cell Solar Panel is suitable for various installation environments. It can be used in both residential and commercial settings, whether rooftop installations, ground-mounted systems, or solar farms. Its versatility makes it a popular choice for different projects, from small-scale residential installations to large-scale utility plants.

The 585W panel has gained significant popularity in the market due to its excellent performance and reliability. It has been widely adopted in regions with high solar irradiation, such as sunny climates and areas with limited available space. As a result, it has become a sought-after solution by solar installation companies, developers, and end users alike.

Greater efficiency in energy generation thanks to technological innovation

HPBC (Hybrid Passivated Back Contact) is a new generation of high-efficiency solar cell technology that is unique for its design without busbars on the front. HPBC cell technology can greatly improve the light absorption and photoelectric conversion capacity of the cell by adjusting its internal structure, thereby effectively increasing the output power of the module. Modules equipped with HPBC cell technology can generate a larger volume of power under high temperature and low irradiation conditions and also have superior performance in terms of power degradation. In global power generation simulations, Hi-MO 6 modules have demonstrated a significant power generation advantage over PERC products, with an average increase in power generation of up to 10% in typical scenarios.

When developing photovoltaic solutions for residential and commercial applications, LONGi's R&D team strives to achieve the highest level of safety and reliability. The Hi-MO 6 employs back contact welding technology, which uses the single-line welding structure instead of the traditional Z-shaped structure to improve the module's crack resistance. This revolutionary technological design, combined with LONGi's lifecycle quality, makes the Hi-MO 6 one of the most reliable photovoltaic modules on the market.

Bringing photovoltaic technology and architectural aesthetics to various applications

The Hi-MO 6 series includes four product lines - Explorer, Scientist, Guardian and Artist - all of them with the standard size M10 (182 mm) and available in types 72C, 66C, 60C and 54C. The aesthetic appeal of the module evokes the minimalist style of modern industrial design and naturally complements a wide variety of application scenarios.

For applications in sectors with higher security and intelligence needs, the Hi-MO 6 also offers the option to further improve security and optimization by pre-installing the intelligent optimizer. In case of failure of the photovoltaic system or shading of the modules, the system Back-end can be remotely monitored and optimized in real time using information from the Smart Optimizer's “digital brain”, ensuring the safety of the power plant and maximizing the system's energy production.

“LONGi has driven the development of the industry over the years with high-quality technical innovation. The Hi-MO series flagship modules have contributed to improving the global energy structure. The Hi-MO 6 is another solid step towards promoting energy equity,” said LONGi Vice President Dennis She.

“LONGi aims to collaborate with more partners to participate in the new energy revolution, provide a clean energy solution that is equally accessible to all and accelerate the energy transformation and development of our planet.”

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