The selection of the tilt angle for a Solar carport requires a combination of factors to achieve optimal power generation efficiency, structural safety and cost effectiveness. The following are key points to consider when selecting the tilt angle:

Geographic location and latitude: In general, tilt angles close to the local latitude maximize average annual power generation.

Seasonal power generation needs: The tilt angle can be chosen to balance high light radiation in the summer with low light radiation in the winter to maximize average annual solar energy collection. If summer generation demand is high, a slightly lower tilt angle may be considered to increase summer generation; if winter demand is high, a higher tilt angle may be needed to increase solar radiation received in the winter.

Space constraints: In space-constrained settings, such as parking lots, the tilt angle may need to be lowered (5-10 degrees) to reduce the footprint and accommodate vehicle heights, although this may sacrifice some power generation efficiency.

Shading factors: consider shading from surrounding buildings or trees to avoid shadow effects, and choose a tilt angle that maximizes sunlight hours.

Economic considerations: The optimal generation angle is not always economically optimal. In some cases, a lower tilt angle, while reducing power generation, can increase installed capacity and increase the amount of power generated per unit area, thus potentially yielding a higher return on investment.

Cleaning and maintenance: flatter tilt angles may require more frequent cleaning to maintain power generation efficiency, whereas large tilt angles help rainwater naturally wash away PV panels.

Structural design: the structural strength and aesthetics of the solar carport frame is also a consideration, the tilt angle needs to be coordinated with the structural design to ensure the stability of the structure and aesthetics.

Local regulation: Depending on local building codes and standards, there may be limitations or recommendations for tilt angles. When selecting a tilt angle, the locally specified building requirements should be followed to ensure compliance and reliability of the installation.

In summary, the choice of tilt angle for a carport solar system is a comprehensive decision-making process that requires a customized design based on the needs of the specific project and environmental conditions. It is best to consult a professional solar system designer or engineer for more accurate advice.