South Africa has many factories, warehouses, schools and hospitals—big buildings with large rooftop spaces. In such a sunny country, these flat surfaces would be perfect for large photovoltaic solar systems that could generate enough renewable energy to supply themselves, and feed into the national grid. This would reduce the amount of coal that South Africa's national electricity provider would need to burn. Renewable energy engineer and Ph.D. candidate Mamahloko Senatla-Jaane was part of a team who researched how commercial buildings could be set up to serve as strategic assets for decarbonization and increase the security of South Africa's power supply.