Some parts of the atmosphere absorb more or less light wavelengths, it’s not a steady amount throughout the entire atmosphere. How much light reaches the surface of the Earth depends on the amount of atmosphere it must pass through to get here, as well as the level of humidity. When the sun is higher in the sky, there is less atmosphere for light to pass through than when the sun is rising or setting. Factors such as clouds, fog, haze, and air pollution all create more matter for the sun’s rays to pass through. On a cloudy or overcast day, your solar heat panels won’t collect as much solar energy as they would on a sunny day.
Angle of Incidence
The angle at which the sun’s rays fall on an object is called the angle of incidence. Surfaces receive more of the sun’s energy when the angle of incidence is around zero. There is a solar window of about six hours in which solar heat panels can achieve the ideal angle of incidence and absorb the most solar energy each day.
Choosing a qualified solar heat panel installer can put your mind at ease. Smith Sustainable Design is an experienced solar heat panel installer, and our team takes these and other factors into consideration when designing a solar thermal system for your home. We design your system to achieve maximum efficiency despite naturally occurring issues.