What is the optimal tilt angle for maximizing annual solar production in most areas of the USA?

The optimal tilt angle for maximizing annual solar production in most areas of the USA is typically around 30 degrees. This angle is a good compromise that allows for effective capture of sunlight throughout the year, as it balances the changing position of the sun in the sky across different seasons.

Solar panels at a tilt of about 30 degrees can effectively perform well during both summer and winter months. During the summer, the sun is higher in the sky and a lower tilt may be effective, but in winter, when the sun is lower, the increased tilt allows for better angle incidence. Utilizing this tilt angle helps ensure that solar panels receive a sufficient amount of direct sunlight throughout the year, thus optimizing energy production.

In contrast, other angles, such as 15 degrees or 45 degrees, may not provide the same level of year-round efficiency. A 15-degree tilt might be too low to capture enough sunlight during winter months, while a 45-degree tilt could capture less sunlight in the summer when the sun is higher. Therefore, the choice of a 30-degree tilt aligns better with maximizing annual solar energy production across diverse geographical locations in the USA.