Polycrystalline solar panels are one of the most popular choices among those who use renewable energy sources. Their manufacturing technology is simpler and more cost-effective, while offering stable performance and durable operation.
How are polycrystalline solar panels made?
Forming a multicrystalline silicon block: Silicon is melted and then poured into a mold, where it solidifies, forming multiple crystals. This process requires less energy and time than the production of monocrystalline solar panels.
Processing: The solidified silicon is cut into square blocks, from which thin slices (wafers) are made. The slices are easily recognizable by their characteristic bluish hue and crystalline pattern.
Assembly: Individual silicon cells are connected with tin strips, and the finished panel is placed between layers of glass and plastic, which protect it from environmental effects.
Performance and efficiency
The efficiency of polycrystalline solar panels is generally between 13-18%, but thanks to modern manufacturing technologies, some models can achieve up to 20% efficiency. Although this may be lower compared to monocrystalline solar panels, the performance of polycrystalline panels is excellent in many environments.
Diffuse light utilization: Polycrystalline solar panels are particularly efficient in diffuse light, which can be advantageous in regions with frequent cloudy days or lower sunlight intensity, such as in northern countries.
Advantages
Lower manufacturing cost: Polycrystalline solar panels require less energy to produce, making them cheaper than monocrystalline panels. This can be an ideal solution for projects with tighter budgets.
More environmentally friendly manufacturing: By reducing energy-intensive processes, the ecological footprint during manufacturing is smaller.
Efficiency in diffuse light: They perform excellently in less sunny areas or in diffuse light conditions.
Disadvantages
Lower efficiency: Compared to monocrystalline solar panels, they offer slightly lower performance in sunny, ideal conditions.
Shorter lifespan: Although the difference is not significant, the lifespan of polycrystalline panels may generally be slightly shorter than that of their monocrystalline counterparts.
Polycrystalline vs. monocrystalline solar panels
| Features | Polycrystalline panels | Monocrystalline panels |
|---|---|---|
| Efficiency | 13-18% (up to 20%) | 15-22% (higher efficiency) |
| Price | Lower | Higher |
| Diffuse light utilization | Better | Less efficient |
| Appearance | Blue, crystalline pattern | Uniform black color |
Who is it recommended for?
Households and businesses looking for a more affordable solar panel system. In less sunny areas where diffuse light utilization is important.
Those who are looking for an environmentally conscious solution and want to reduce installation costs.