The temperature coefficient of solar panels reflects how much a panel’s efficiency decreases as its temperature rises. Here’s a comparison of the temperature coefficients for thin-film solar panels and Heterojunction Technology (HJT) solar panels:
Thin-Film Solar Panels
- Temperature Coefficient Range: Thin-film solar panels typically have a temperature coefficient around -0.2% / °C. This indicates a relatively low decrease in efficiency per °C increase in temperature compared to other types of solar panels.
- Advantages: Their lower temperature coefficient means they perform better at higher temperatures, making them suitable for hot climates.
- Technologies: Include CdTe (Cadmium Telluride) and CIGS (Copper Indium Gallium Selenide) thin-film technologies, both known for better high-temperature performance compared to traditional crystalline silicon panels.
Heterojunction Technology (HJT) Solar Panels
- Temperature Coefficient Range: HJT solar panels generally have a temperature coefficient between -0.2% to -0.3% per °C. This is also relatively low, similar to thin-film panels.
- Advantages: HJT technology combines different semiconductor materials to enhance performance, including a lower temperature coefficient, which makes it more efficient at higher temperatures.
- Features: The use of a thin layer of amorphous or microcrystalline silicon on a crystalline substrate acts as a buffer, reducing the impact of temperature changes on output power.
Comparison Summary
| Technology | Temperature Coefficient Range (%) | Characteristics |
|---|---|---|
| Thin-Film | -0.2% / °C | Suitable for hot climates, low temperature impact. |
| HJT Technology | -0.2% to -0.3% / °C | Combines different materials for better efficiency at high temperatures. |
Both thin-film and HJT solar panels offer advantages in hot climates due to their lower temperature coefficients compared to traditional crystalline silicon panels, which typically have coefficients ranging from -0.4% to -0.5% / °C.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-does-the-temperature-coefficient-of-thin-film-solar-panels-compare-to-hjt-technology/
