As African countries accelerate investments in renewable energy to expand electricity access, strengthen energy security and meet climate commitments, new scientific research suggests that the continent’s energy planners may need to rethink how future renewable power systems are designed. A study published in Nature Communications concludes that climate change is not only altering the availability of renewable resources but is also changing the most cost-effective balance between solar and wind power, with significant implications for infrastructure planning, investment decisions and long-term electricity system resilience.
The research argues that governments can no longer rely solely on historical weather patterns when planning renewable energy projects. Instead, future electricity systems should be designed using climate projections that account for changing wind speeds, solar radiation patterns and evolving weather variability. According to the researchers, failing to adapt renewable energy portfolios to future climatic conditions could increase electricity system costs substantially, requiring additional generation capacity and greater investment in backup infrastructure to maintain reliable power supplies.
The findings arrive at a critical moment for Africa. The continent is simultaneously confronting one of the world’s largest electricity access deficits while experiencing some of the most severe impacts of climate change. According to the International Energy Agency (IEA), approximately 600 million people across Africa still lack access to electricity, making reliable and affordable energy one of the continent’s most pressing development priorities. Governments are increasingly turning to renewable energy as a means of closing that gap while reducing dependence on imported fossil fuels and improving energy security.
However, the study suggests that achieving these objectives will require a more sophisticated approach to renewable energy planning than simply installing more solar panels or wind turbines.
Rather than examining how climate change affects individual renewable technologies in isolation, the researchers developed an integrated framework combining multiple climate scenarios with electricity investment and operational modelling. The objective was to determine the optimal mix of solar and wind generation capable of delivering electricity at the lowest possible system cost under future climate conditions.
Their analysis found that while the ideal balance between solar and wind generation shifts only moderately in many regions, even relatively small deviations from the optimal mix can create significant economic consequences. In several cases, the additional costs associated with investing in an outdated renewable portfolio exceeded the direct impacts of climate change on renewable energy generation itself.
According to the study, geography remains one of the strongest determinants of renewable energy performance. Latitude, seasonal weather patterns, cloud cover, wind behaviour and climatic variability all influence the most efficient combination of renewable technologies. As climate change alters these variables over coming decades, electricity systems designed using historical weather records alone risk becoming less efficient and more expensive to operate.
For Africa, these findings carry considerable strategic importance.
Across the continent, governments are investing billions of dollars in utility-scale solar parks, wind farms, battery storage systems and regional electricity interconnections. Countries including Morocco, Egypt, Kenya, South Africa, Namibia and Mauritania have announced ambitious renewable energy expansion programmes aimed at supporting industrialisation while positioning themselves as future exporters of clean energy and green hydrogen.
Morocco, for example, continues expanding large-scale solar and wind capacity while strengthening electricity interconnections with Spain and Portugal. Egypt is rapidly developing renewable energy projects around the Gulf of Suez and the Benban Solar Park while advancing green hydrogen initiatives targeting European markets. Kenya derives most of its electricity from renewable sources, including geothermal, wind and hydropower, while increasingly integrating utility-scale solar projects into its national energy mix.
These investments demonstrate Africa’s growing role in the global energy transition. Yet the new research suggests that future infrastructure planning will need to become increasingly climate-responsive if these assets are to deliver maximum long-term value.
According to the International Renewable Energy Agency (IRENA), renewable electricity costs have declined dramatically over the past decade, with utility-scale solar photovoltaic costs falling by approximately 90% and onshore wind costs dropping significantly over the same period. Falling technology costs have made renewable energy economically attractive across much of Africa, particularly where expensive diesel generation continues to dominate off-grid and backup electricity supply.
Nevertheless, lower technology costs alone do not guarantee efficient electricity systems. Electricity grids require reliable generation throughout the day and across seasons. Solar generation naturally peaks during daylight hours, while wind resources often follow different daily and seasonal patterns. Achieving the right combination reduces the need for costly battery storage, backup generation or excess installed capacity.
Climate change introduces additional complexity because future weather conditions may alter those generation profiles over the operational lifetime of renewable assets, which typically exceeds 25 years. The researchers argue that electricity planners should increasingly incorporate climate science into investment decisions, enabling governments to optimise renewable portfolios based on projected rather than historical resource availability.
This represents an important evolution in energy planning. Historically, renewable energy projects have been evaluated primarily using past meteorological observations. The study suggests that future planning should instead integrate multiple climate projections to improve investment efficiency while strengthening system resilience.
For African economies facing constrained public finances and significant infrastructure financing needs, such optimisation could generate substantial economic benefits. According to the African Development Bank (AfDB), Africa requires between US$130 billion and US$170 billion annually to meet its infrastructure needs, with the electricity sector accounting for one of the continent’s largest investment gaps. Ensuring that renewable investments remain productive over several decades therefore becomes increasingly important for governments, development finance institutions and private investors alike.
The research also has implications for electricity market design.
Regional power pools such as the Southern African Power Pool (SAPP), the West African Power Pool (WAPP) and the Eastern Africa Power Pool (EAPP) aim to improve electricity reliability by enabling countries to trade power across interconnected networks. Climate-responsive renewable planning could strengthen these regional markets by encouraging complementary generation portfolios that reduce system-wide variability while improving energy security.
Battery storage, flexible transmission networks and demand-response technologies are also expected to become increasingly important as renewable penetration rises.
According to the researchers, resilient electricity systems will depend less on maximising individual renewable technologies than on achieving balanced portfolios capable of adapting to changing climatic conditions.
This approach aligns with broader international discussions around climate adaptation.
Much of the global conversation on climate resilience has focused on protecting infrastructure from floods, droughts and extreme weather events. The new study broadens that perspective by highlighting how climate change should also influence infrastructure design itself, particularly for long-lived energy assets expected to operate throughout the century.
For Africa, where energy access, industrial development and climate resilience remain closely interconnected, the findings reinforce the importance of evidence-based planning.
As countries continue investing in renewable electricity, future success may depend not only on expanding clean energy capacity but also on ensuring that infrastructure reflects the climate conditions under which it will ultimately operate. Integrating climate modelling into renewable energy planning could improve investment efficiency, reduce long-term electricity costs and strengthen the resilience of power systems supporting Africa’s economic transformation.
The transition towards low-carbon energy is therefore becoming more than a question of deploying renewable technologies. It increasingly requires adaptive planning capable of responding to a changing climate, ensuring that today’s infrastructure investments remain economically viable and technically reliable for generations to come.
