Posts tagged: irradiance
← Back to blogTransposition Models: How Volcast Calculates What Hits Your Tilted Panel
Weather data tells us what reaches a horizontal surface. Your panels are tilted. The mathematical bridge between the two is called transposition — and the choice of model matters.
The Irradiance Journey: From Space to Your Solar Panel in 8 Steps
Follow a beam of sunlight from the edge of Earth's atmosphere through scattering, absorption, clouds, and reflection until it reaches your tilted panel and becomes electricity.
Why Cloud Cover Is the Hardest Variable in Solar Prediction
Temperature is predictable. Sun position is calculable. But clouds? Clouds are chaos theory in action — and the single biggest source of solar forecast error.
Direct vs Diffuse Sunlight — Why Cloudy Days Still Generate Power
Not all solar radiation is the same. Understanding the three components of sunlight explains why overcast days still produce electricity.