Yes, it is generally safe to mount solar panels on the roof when proper installation guidelines are followed. Solar panels like the Anker Solar Panel 625 are designed to withstand various weather conditions and are engineered to be durable and secure. When installed using appropriate solar panel roof mounts, they can be safely attached to the roof structure. However, it is crucial to ensure that the installation is done correctly, considering factors such as roof condition, load-bearing capacity, and adherence to local building codes.

Solar panels can be mounted to a roof using different methods, depending on the roof's condition, orientation, and available space. Common mounting options include roof attachments, rails, and brackets. Generally, you can follow the following steps to mount solar panels to a roof:

1. Assess the roof's suitability to select the right mounting method.
2. Install the solar panel roof mounts or rails.
3. Attach the panels to the mounting system.
4. Make electrical connections.

If necessary, hire professional installers experienced in solar panel installation to ensure proper mounting, compliance with safety standards, and adherence to local regulations. 

No, solar panels do not have to be flat on the roof. While a flat installation can be easy to operate, solar panels can also be installed on pitched roofs or angled to optimize sunlight exposure. You can use mounting systems, such as racks or brackets to securely position the panels at the optimal angle for capturing sunlight. However, the angle of the solar panels depends on factors such as the location, climate, and desired energy production.

When installed correctly, roof-mounted solar panels should not leak. Proper installation includes the use of mounting equipment and sealants to ensure a watertight seal between the panels and the roof. So it's rare to see roof leaks after solar panels. However, if you still worry about leaks, you can choose to install roof solar panels like the Anker 531 Solar Panel on brackets which will cause minimal impact on the roof integrity.

1. Shaded areas:Sunlight is crucial for the proper functioning of your solar panels and solar generators alike, so it's best to avoid installing them in heavily shaded areas. Trees, nearby buildings, or other obstructions can significantly reduce the solar panel's performance.
2. Areas with structural limitations:If your roof or the structure you intend to install the solar panels on is not structurally sound or cannot support the weight of the panels, it may not be a suitable location.
3. North-facing roofs (in the Northern Hemisphere): For maximum energy production, it's generally recommended to install solar panels on south-facing roofs or areas with optimal sun exposure. North-facing roofs receive less direct sunlight and may not generate as much electricity.
4. Historic or protected buildings:In some cases, historic buildings or properties under specific preservation regulations may have restrictions on altering the appearance of the roof or making structural modifications, which can limit the installation of solar panels.