Installing a solar roof tiles system on a roof is a complex project with some specific requirements for the structure and materials of the roof. A detailed assessment is required prior to installation to ensure that the roof can support the PV system and operate safely and stably over the long term. The following are some of the main requirements:

1. Roof structural strength

Load-bearing capacity: The roof needs to have sufficient load-bearing capacity to support the solar roof tiles and other installed equipment. In general, the load-bearing capacity of the roof should be able to support the overall weight of the components as well as external loads such as wind and snow.

Quality of roofing material: The roofing material (e.g. wood, steel or concrete) should be strong and durable to ensure that it will not be deformed or damaged during use.

2. Roof slope

Suitability of slope: The slope of the roof should normally be between 15° and 60°, which ensures that the solar roof tiles can receive sunlight at an optimal angle, drain water effectively and prevent snow from accumulating. If the slope is too small, less than 15°, it is not possible to install solar roof tiles.

3. Roof type

Flat roof: Solar roof tiles cannot be installed and are not recommended.

Pitched roofs: Solar roof tiles can be nailed to the hanging tile strips as in conventional installation. The natural slope of the roof can be utilized to increase light reception.

Roofing material: The roof surface material needs to be durable and waterproof.

4. Waterproofing and sealing

Waterproof design: Ensure that the roof is watertight during installation to avoid leaks that could cause damage to the roofing materials.

Drainage system: Ensure that the roof has a good drainage system to prevent waterlogging and water damage problems that can affect the long-term stability of the PV system.

5. Sunlight Exposure

No Shadow Shading: The roof should be selected in an area with sufficient sunlight, avoiding surrounding buildings, trees, etc. to block the sunlight, so as to ensure that the PV modules can work under the best conditions.

Orientation and angle: The ideal PV system should face due south (in the northern hemisphere) and have a suitable tilt angle to optimize light reception.

6. Electrical Safety

Grounding system: Rooftop PV systems need to be well grounded to prevent lightning strikes and static buildup.

Cable Layout: Ensure that cables are laid out in such a way that they do not interfere with the aesthetics and structural safety of the roof, while avoiding direct exposure to sunlight.

7. Building codes and policies

Compliance: Understand local building codes, policies and regulations before installation to ensure that the installed PV system complies with relevant national and local standards and regulations.

8. Maintenance space

Maintenance and access: Solar roof tiles should be installed with future maintenance space in mind to ensure that the installer can easily conduct regular inspections and maintenance of the equipment.

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