Quick Answer
Monocrystalline panels perform better in heat, retaining around 85-90% of their efficiency at high temperatures, compared to 60-70% for polycrystalline panels. This difference is due to their lower thermal resistance. As a result, they can provide more energy per square foot in warm climates.
Efficiency Comparison
Monocrystalline panels, with their higher efficiency rate, typically range from 15-20% efficiency, compared to 13-17% for polycrystalline panels. This difference in efficiency results in more energy output per panel, especially in warm conditions. For example, a monocrystalline 300-watt panel can produce around 5-6 watts per degree Celsius, while a polycrystalline panel of the same wattage might only produce 4-5 watts.
Heat Tolerance and Energy Output
Monocrystalline panels have a lower maximum temperature rating of 85°C, while polycrystalline panels typically max out at 80°C. However, the real-world impact of this difference is relatively minimal. In practice, a 1% decrease in efficiency per degree Celsius translates to a 0.5-1% difference in energy output between the two types of panels. This means that for every 200-watt panel, the owner can expect a 1-2 watt difference in energy output per degree Celsius. This is not a significant difference, especially considering the overall efficiency and price of the panels.
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