The Institute for Timber Construction South Africa (ITC-SA) cautions homeowners planning to install solar systems on their roofs to remember that most existing roofs were not designed to carry additional permanent loads. No matter the size of the system, use qualified professionals to install and sign off on it. It is necessary to ensure the system can operate safely and is required under municipal laws and for insurance.
You can read more on this here – https://www.woodbizafrica.co.za/april-2023-issue-25/#april-2023-issue-25/36/