Ghana’s Cities Are experiencing dumsor despite sitting on a sun mine

Apart from death, there is no word that any Ghanaian dread the most than “dumsor.” The word, which is an amalgamation of “dum” (off) and sor (on), has like a permanent guest, come to stay and dominate Ghana’s public discourse. Decades of load-shedding have ingrained itself into the social fabric of every Ghanaian society. There is a running joke that if you run out of excuse to give as to why you have not performed a task, you can just say that you are experiencing dumsor and no one would ever doubt you. Ghanaians have come to accept that they will never experience stable power, and it is a shame that we have accepted such a social reality when we are literally sitting on a sun mine. Research that we conducted using data from PVGIS SARAH3 and the Ghana Statistical Service indicates that Ghana has the solar energy potential to cover its residential electricity demand many times over. We analyzed the situation by looking at five populous cities: Accra, Kumasi, Takoradi, Tamale and Tema. The data paints a compelling picture: Ghana should not be suffering from dumsor when the country has untapped potential for rooftop solar photovoltaic (PV). Ghana’s urban rooftops can be a source of untapped energy to help solve our power crisis.

The Numbers That Should Shake Energy Policy

The writer modelled this scenario: “What would happen if each housing unit in these aforementioned cities had a standard 5 kilowatt-peak (kWp) rooftop solar system installed?” The metric used to judge adequacy was simple: “Could the energy generated meet the assumed residential demand of 500 kWh per person per year? Our statistical model across these five cities gave a resounding yes. We calculated a self-sufficiency ratio for each city; a score above 1.0 means rooftop solar alone was enough to cover all the residential electricity needs. Here is what we found: Accra had a self-sufficiency ratio of 9.2 times, Kumasi had a self-sufficiency ratio of 5.8 times, Tema had a self-sufficiency ratio of 6.4 times, and Tamale and Takoradi had self-sufficiency ratios of 5.5 and 5.6 times, respectively. Accra’s wide margin is not a result of having the most sunshine per square meter but rather of its large population and large number of housing units. 

Figure 1 shows the self-sufficiency ratio for each city

With a rough estimate of 558 housing unit per 1,000 people (70% higher than Tamale’s 323), the capital city has the largest aggregate surface area for solar panels, giving it a total solar potential of approximately 13,556 GWh/year — about 47% above the five-city average.

Figure 2 shows the total annual solar potential per each city

Where the Sun Shines Hardest

Based on our model, the writer found out that with regards to raw solar intensity, the north has the edge. Tamale is located in Ghana’s upper belt, largely outside the heavy cloud cover of the forest zone. Using 14 years of historical data (2010 – 2023), the city has consistently recorded the highest annual energy output per system, with a median of approximately 8,775 kWh per year. By contrast, Kumasi sits within the rainforest belt and records the lowest median, at approximately 7,980 kWh per year. Despite the incidence of climate change witnessed in the world, our data shows that in the last 14 years, there has not been a long-term decline in solar resources and this is a positive sign that investment in solar will still pay off in the future. Below is a snapshot of the cities compare on key metrics.

So Why Aren’t We Already Doing This?

It seems that the simplistic answer to our energy crisis is to implement nationwide solar adaptation, but then the situation on the ground paints a different picture. On the demand side, many households cannot afford solar PV. There is little awareness of the technology’s benefit to individual residents, both in rural and urban areas. Aside from this, there is the general assumption that electricity is the government’s job, not households’. On the supply side, the country has too few certified solar installer and no reliable equipment quality standards. Ghana has a Renewable Energy Act 832 of 2011 and this introduced feed-in tariff mechanisms. However, like most implementation in Ghana, the rollout of the feed-in tariff mechanism has been slow and this undermines investor confidence. Grid connection procedures are still opaque and the financial instruments needed to make solar accessible is still absent. Interest rate are still exorbitant despite the Bank of Ghana’s attempt to make loans cheaper. A cheaper and more accessible financial instrument for solar will go a long way to make solar PV accessible to the masses.

What Needs to Happen Next to drive solar PV adoption?

The country needs to:

1.  Expand and properly enforce net-metering and feed-in tariff mechanisms under the existing Renewable Energy Act.
2. Develop accessible financing instruments such as solar leasing schemes, green bonds, and SSNIT-backed pension-linked solar loans to reduce the upfront cost barrier for urban households.
3. Invest in grid modernization in high-density cities like Accra and Tema to handle two-way power flows as distributed generation grows.
4. Prioritize Tamale for off-grid and mini-grid solar solutions, given its higher irradiance and lower grid reliability.
5. Commission high-resolution building footprint mapping via remote sensing to sharpen estimates of actual usable rooftop area.

We are not promising instant energy independence, but we are advocating an energy transition to solar PV as a way of solving the country’s persistent energy crisis. However, our recommendations are likely to be impacted by a few things such as shading, structural suitability, informal settlement layouts, and grid capacity all limit how quickly actual deployment can scale. The assumed 5 kWp system size may also overestimate what is feasible on smaller urban dwellings. Despite these shortcomings, the fundamental issue is that the country has the solar resources and our cities are not utilizing our solar potential energy. We tend to assume that we are resource poor but this is not the issue when it comes to electricity. We are only policy-poor and finance-poor. 

The Bottom Line

Ghana has spent decades managing an electricity crisis while sitting beneath one of the most abundant solar resources on the continent. Accra alone has a per-capita solar energy availability of roughly 4,600 kWh per person per year more than nine times the assumed residential demand. Every city in this study exceeds that demand threshold by a factor of at least five. Rooftop solar is not a niche solution for eco-conscious households. In the Ghanaian context, it is a viable, data-backed pathway to urban energy resilience. The question is no longer whether the sun can power our cities. It is whether our policies, financial systems, and institutions will finally let it.

About the authors 

Moses Ayirebi is an infrastructure and urban planning professional with over eight years of program management experience across Ghana and the United States, including capacity planning for $10M+ distributed asset fleets. His research applied Google’s Solar API methodology to Ghana Energy Commission data to quantify 19.2 GWh of renewable energy potential across West African cities. He holds an M.S. in Urban Planning and Policy from Northeastern University and recommends AI data center regulation policy for the Massachusetts state legislature.

Joseph Yaw Frimpong is a PhD Candidate at the University of Ghana. He’s a demography and a data scientist. His research focuses on Non-communicable diseases, Sexual and Reproductive Health.