Can Flexible Solar Arrays Be Used on RV Roofs?

Choosing the Right Flexible Solar Array

Flexible solar arrays are made from thin-film materials, such as amorphous silicon (a-Si) or cadmium telluride (CdTe). These materials are lightweight, flexible, and can be cut to any size. When selecting a flexible solar array for an RV roof, consider the total power output required, the available roof space, and the mounting system needed to secure the panels. A typical RV roof can accommodate a 200-400 watt flexible solar array, which can be mounted using adhesive-backed modules or frame-mounted systems. For example, a 200 watt flexible solar array can be designed with 20 individual modules, each measuring 20 inches by 40 inches.

Mounting and Installation Considerations

When installing flexible solar arrays on an RV roof, ensure a watertight seal is achieved between the panels and the roof to prevent water ingress. This can be achieved using a combination of sealants, such as silicone or polyurethane-based products, and a flashing system. The mounting system should also be designed to accommodate any roof movement or expansion due to temperature changes. A good rule of thumb is to use a mounting system that provides at least 1 inch of clearance between the solar array and the roof edge to allow for expansion.

Performance and Durability Expectations

Flexible solar arrays are designed to perform well in a variety of environmental conditions, including high temperatures, humidity, and exposure to the elements. However, they may experience a slight decrease in efficiency due to the flexible nature of the material. Typical power output expectations for a 200 watt flexible solar array installed on an RV roof are around 180-190 watts per hour per day, depending on the solar irradiance and temperature conditions. To maximize performance and durability, ensure the solar array is installed with a suitable tilt angle (around 30-40 degrees) and is regularly inspected and maintained to prevent damage or degradation.