Renewable Energy and Economic Growth Across Growth Regimes in Sub-Saharan Africa

In many parts of the world, the path to a stronger economy is often linked to the availability of reliable power. When factories can run without interruption, when schools have light for evening study, and when businesses do not need to rely on expensive diesel generators, the potential for growth increases. For decades, policymakers and economists have looked at renewable energy—power generated from the sun, wind, water, and heat of the earth—as a key driver for this kind of development. The logic seems straightforward: if a country switches to cleaner, renewable sources, its economy should grow faster. However, the reality of how energy translates into economic progress is rarely a simple line. In some places, a new power plant might spark immediate industrial activity, while in others, the same investment might sit idle because the roads to transport goods are poor or the banks will not lend the money needed to build a factory. The question is not just whether renewable energy helps, but whether it helps in the same way everywhere, or if its impact depends entirely on the current health of the economy.

A researcher set out to answer this specific question for Sub-Saharan Africa, a region where the need for new energy is urgent and the economic conditions vary wildly from year to year. They wanted to know if the benefits of renewable energy change depending on whether a country is currently growing quickly or struggling to grow. To find the answer, they gathered data from thirty-seven different countries over a period spanning from 1993 to 2022. They looked at how much of each country's total energy came from renewable sources and compared that to how fast the average person's income was growing. Crucially, they did not just look at the raw numbers; they used a method that allowed them to see if the relationship between energy and money changed when a country's growth rate crossed a certain point. They treated the past three years of growth as a way to define the current economic "regime," ensuring that the measurement of the economic state was not confused with the growth happening in the very same year.

The researcher examined a massive dataset containing nearly a thousand observations of country-years. They controlled for other factors that could influence growth, such as how much a country was investing in new buildings and machinery, how open it was to international trade, how stable its prices were, and how fast its population was increasing. They also accounted for the fact that countries in this region often face similar external shocks, such as changes in global oil prices or climate events, which can make their economies move in similar directions even without direct contact. By using advanced statistical tools, they tested whether a higher share of renewable energy consistently led to faster economic growth, and whether this effect became stronger or weaker when the economy was in a slow period versus a fast one.

The results of this careful analysis were surprisingly quiet. The study found no clear evidence that a higher share of renewable energy leads to faster economic growth on average across these countries. When the researcher looked at the data, the link between renewable energy and growth was so weak that it could easily have happened by chance. They found that even when they split the countries into two groups—one group growing slowly and another growing quickly—the renewable energy share did not show a meaningful impact in either group. The idea that renewable energy might be a special boost for struggling economies, or conversely, that it only works when an economy is already booming, was not supported by the numbers. The data simply did not show a stable, predictable pattern where adding more renewable energy automatically translated into more economic growth.

One of the most important findings was about what the data actually represents. The researcher pointed out that the standard measure of renewable energy used in these studies is a broad percentage that mixes very different things together. In many of these countries, a large portion of this "renewable" energy comes from traditional biomass, such as wood and charcoal burned for cooking. This is a very different thing from modern solar panels or wind turbines that power factories and homes. A country might show a high percentage of renewable energy simply because its people are still relying heavily on wood, not because it has built a modern, clean energy grid. This mixture makes it difficult to see the true economic value of modern renewable projects. The study suggests that when you look at the broad category as a whole, the signal of modern progress is drowned out by the noise of traditional fuel use.

The researcher also tested their findings using different methods to ensure they were not missing a hidden pattern. They tried looking at the data in different time periods, excluding countries with large oil industries, and using different mathematical approaches to handle the complexity of the region's economies. In every case, the result remained the same: the broad share of renewable energy did not show a reliable connection to economic growth. Even when they looked specifically at renewable electricity, which is a cleaner measure than total energy use, the results did not show a positive boost to growth. In some cases, the numbers even suggested a negative link, but the researcher explained this likely happens because the total amount of energy used in a country can shrink during hard times, making the share of renewables look bigger even if the actual amount of renewable power did not increase.

This does not mean that renewable energy projects are useless or that they do not create value. Instead, it means that the simple statistic of "percentage of renewable energy" is not a good tool for predicting how fast a country's economy will grow. The study concludes that policymakers should stop looking at this broad percentage as a guarantee of economic success. Instead, they should focus on the specific quality of the energy being delivered. They should measure how many hours the lights stay on, how many megawatt-hours of reliable electricity are actually sent to factories, and how much money is saved by not having to import fuel. These specific, tangible measures of energy service are what actually help businesses and people thrive, not the abstract number of how much of the energy mix comes from renewable sources.

The study serves as a reminder that in the complex world of development, good intentions and broad categories are not enough. To understand how energy drives growth, one must look at the details of how that energy is used and the specific conditions of the economy receiving it. For Sub-Saharan Africa, the path forward is not necessarily to chase a higher percentage of renewable energy in the total mix, but to ensure that the modern, reliable energy services that do exist are delivered effectively to the people and businesses that need them. The data suggests that until the focus shifts from the broad share to the actual quality and reliability of the power, the link between renewable energy and economic growth will remain difficult to see.