0BB Technology: A leap toward high-efficiency cost-effective solar panels

In the worldwide photovoltaic market, crystalline silicon solar cells account for a significant part. However, as the industry evolves, these cells face new hurdles in terms of cost reduction and efficiency. Traditional solar cells require a substantial amount of silver paste to build busbars and fingers, which not only raises costs but also blocks some sunlight, reducing power generation efficiency. To address these challenges, 0 Busbar (0BB) technology was created. This approach eliminates busbars, reduces the need for silver paste, and enhances the light-receiving surface of the cells, considerably improving the power production efficiency and economic feasibility of solar modules.

The Origin of 0 Busbar (0BB) Technology

When sunlight strikes a photovoltaic cell, it produces electricity via the photovoltaic effect. However, this electricity must be gathered and extracted through grid lines before it can be used by humans. Traditional solar cells had silver-based grid lines separated into fingers and busbars. Fingers are thinner; busbars are thicker. Electricity is gathered by the fingers, transferred to the busbars, and finally transmitted through copper ribbons.

Since Bell Labs developed the first viable monocrystalline silicon solar cell in 1954, the number and width of grid lines on photovoltaic cells have steadily increased and are used by the top solar cell manufacturers in India.  From 2BB (two busbars) to MBB (multi-busbars) and SMBB (super multi-busbars), increasing the number of busbars has resulted in smaller busbars, saving on silver paste and expenses. More bus bars shorten the current route in the fingers, lowering power loss while increasing power output.

The Evolution of Busbars

Despite the widespread use of MBB and SMBB technologies in the industry, some researchers offered a revolutionary approach: removing the busbars and directly attaching the fingers to the ribbons using solder points. This principle is the foundation of 0 Busbar (0BB) technology.

0BB technique improves the light-receiving area of cells by removing busbars, reducing the consumption of silver paste, lowering costs, and increasing power production efficiency.

Advantages of 0 Busbar Technology

1. Increased Power: 

Removing busbars decreases shading and increases power output. The denser density of solder points in 0BB technology shortens the current route in the fingers, decreasing power loss while increasing power generation. Furthermore, the bigger surface area of photovoltaic cells, along with the prevalent mounting standard of up to 210 mm cell size, leads in higher power production from a single PV panel.

2. Cost Reduction: 

Photovoltaic cells’ non-silicon cost is approximately 35% due to traditional grid lines composed of silver paste. The rising price of silver has put pressure on solar cell manufacturing. By eliminating the primary busbar, 0BB technology minimizes the cost of silver paste, cutting the total cost of solar cells. 

3. Improved Efficiency: 

0BB technology reduces electrical resistance in solar cells, leading to more efficient electron flow and energy conversion efficiency. This results in more energy output from the same amount of sunshine, making 0BB solar cells more efficient.

4. Improved Shading Tolerance: 

0BB cells’ many thin connections provide multiple paths for electrical current, decreasing the possibility of power loss due to partial shading. This is especially useful in locations where shading from trees or buildings can influence performance.

5. Reduced Hotspots: 

0BB technology distributes electrical current evenly across the cell surface by solar module manufacturers, reducing the incidence of hotspots due to excessive resistance. This helps to reduce efficiency and cell deterioration over time.

Busbar (0BB) innovation may be a progressive headway in solar cell design. By dispensing with busbars and utilizing denser solder points, 0BB cells accomplish expanded control yield, lower generation costs, progressed productivity, superior shading resilience, and decreased hotspots. This innovation which you can find in products by Premier Energies guarantees a noteworthy enhancement within the financial achievability and proficiency of solar modules.

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