- This topic has 1 reply, 2 voices, and was last updated 59 minutes ago by
.
Solar Panel Temperature Coefficient
-
What does the temperature coefficient in a solar panel datasheet mean, and why is it important?
The temperature coefficient in a solar panel datasheet indicates how much the panel’s power output changes with temperature. It’s usually expressed as a percentage per degree Celsius (%/°C) and typically refers to the power temperature coefficient (Pmax).
What It Means:
If a solar panel has a temperature coefficient of -0.38%/°C, it means:1) For every 1°C increase in temperature above 25°C (the standard test condition or STC), the panel’s power output drops by 0.38%.
2) Conversely, for each degree below 25°C, output increases by 0.38%.
Why It’s Important:
1) Real-world performance: Solar panels often operate at higher temperatures than 25°C, especially on rooftops or in sunny climates. The temperature coefficient helps estimate how much power loss you’ll experience under those conditions.2) Panel efficiency: A lower (less negative) temperature coefficient is better — it means the panel handles heat more efficiently and loses less power as it heats up.
3) System design and ROI(Return on Investment): Understanding this value helps in:
-Predicting energy production more accurately.
-Choosing the best panels for hot climates.
-Improving financial projections and return on investment (ROI).
You must be logged in to reply to this topic.