Harnessing the Solar Energy Potentials in Sub-Saharan Africa

Sub-Saharan Africa possesses an immense solar energy potential, capable of meeting the continent’s energy demands many times over. Yet, a staggering 600 million people still live in energy poverty, often relying on traditional fuels like wood and coal for daily needs such as cooking. This reliance contributes to significant health issues and environmental degradation, highlighting a critical gap between potential and reality that innovative research and strategic partnerships are now working to close.

A Technological Pivot: Harnessing the Solar Energy Potentials in Sub-Saharan Africa for Safer Cooking

The health consequences of cooking with biomass are severe, with studies suggesting that a transition to cleaner cooking methods could prevent up to half a million deaths annually from smoke and soot inhalation. Responding to this crisis, researchers led by Professor Ole Jørgen Nydal at the Norwegian University of Science and Technology (NTNU) are collaborating with African universities to pioneer new solar cooking technologies. The goal is to develop solutions that are not only clean but also practical and affordable for communities where barriers like the high cost and short lifespan of batteries have slowed the adoption of clean energy.

A central focus of this research is overcoming the mismatch between when solar energy is available and when meals are typically prepared. The team is developing and testing “heat batteries”—thermal storage systems using materials like vegetable oil or solar salt—that can capture the sun’s energy during the day for use in the evening. While direct solar concentrators have existed for years, their adoption remains low. Nydal’s work indicates a preference for systems that use photovoltaic panels to power heating elements connected to these storage units. Though less thermally efficient, these systems are simpler, more durable, and better at capturing diffuse sunlight on overcast days.

From Lab Prototypes to Local Solutions: Harnessing the Solar Energy Potentials in Sub-Saharan Africa

For these innovations to succeed, they must be locally producible, robust, and safe for indoor use. The research evaluates various designs for different cooking styles, from high-heat frying to oven baking. This collaborative effort extends across the continent, with active partners in Ethiopia, Tanzania, Uganda, Mozambique, and growing interest from Malawi, South Sudan, South Africa, and Namibia. A prime example of this local innovation is the work of Jimmy Chaciga, a PhD student at Makerere University in Uganda, who developed an efficient small-scale solar cooker featuring a sunflower oil tank, a heating element, and three solar panels.

The primary challenge has now shifted from conceptualization to implementation. Moving these technologies beyond university laboratories requires engaging with external manufacturers and testers to scale production. This effort aligns with broader strategies to overcome systemic hurdles like fragile grids, workforce shortages, and financing gaps that have historically slowed solar adoption in the region. Initiatives like the Africa Solar Belt Program, which aims to distribute 50,000 solar home systems, demonstrate the large-scale commitment needed to complement grassroots technological development.

Integrating Renewables for a Sustainable Future by Harnessing the Solar Energy Potentials in Sub-Saharan Africa

Researchers are also exploring integrated energy systems, such as converting wind power into thermal storage, to provide more reliable energy. Combining wind and solar energy creates a more resilient power supply, crucial for both domestic and commercial applications. The ultimate vision is for partner universities to become hubs of innovation, driving the development and deployment of these new cooking solutions.

The impact of this work is already being recognized, with a prototype from the NTNU solar oven project now featured in the Norwegian Museum of Science and Technology’s energy exhibition. While significant challenges remain, the combination of targeted research, international cooperation, and local ingenuity promises to unlock Sub-Saharan Africa’s solar potential, transforming energy access and improving millions of lives.

Sources

1. Harnessing Solar Energy in sub-Saharan Africa – The Borgen Project
2. Resource Display: Harnessing Renewables in Sub-Saharan Africa
3. Unlocking Solar Energy Power Impact by Harnessing Africa’s Sun
4. Harnessing Renewables in Sub-Saharan Africa: Barriers, Reforms …
5. In sub-Saharan Africa, solar power is benefitting people …
6. Project Zero: Harnessing solar energy in Cameroon | – MTN Group
7. 5 Ways to Improve China-Africa Cooperation on Clean Energy