Greater Cairo is home to over 20 million people, known for its bustling nature to its residents and visitors alike. Currently, the megacity is reliant on fossil fuels to power a population that never sleeps, a continuous stream of traffic, and rising cooling demand. Natural gas dominates electricity generation, while oil continues to fuel transport and industry. This dependence leaves the energy system exposed to external shocks in an increasingly volatile geopolitical landscape. Recent regional tensions, including disruptions affecting key oil and gas trade routes, have pushed the Egyptian government to introduce emergency measures such as earlier closing hours for commercial activities, reduced street lighting, and partial remote working. Beyond energy security, continued reliance on fossil fuels carries significant public health costs. Air pollution from the power, heat, and transport sectors is already a major concern. It is also intensifying as Greater Cairo’s urban footprint sprawls outwards, its traffic congestion worsens, and its population grows at a sped up pace because of rural-to-urban migration. Despite these critical challenges, could solar energy offer a sustainable transformation pathway for the megacity without compromising its socioeconomic growth?
To answer this question, new research from LUT University carried out a multi-dimensional assessment of Greater Cairo’s transition pathway options. The study assessed scenarios ranging from current policy targets to a full shift to renewable energy by 2050. The results show that a transition to a Power-to-X Economy based entirely on renewables is not only technically feasible but also economically competitive relative to the current policy trajectory. It also offers a wide range of co-benefits. What stands out in Greater Cairo’s case is that this transition could be driven primarily by its abundant solar resources, effectively rendering it a Solar-to-X Economy, as envisioned across Africa.
So how could Greater Cairo get there? The findings point to several key pillars for a successful and timely transition: large-scale solar PV deployment, the rise of energy prosumers, enhanced storage and system flexibility, full sector coupling, and stronger inter-regional grid connections. By 2050, the megacity could source almost all its local electricity supply from solar PV, driven by its exceptional solar resources and rapidly declining technology costs.
A central element of this transition is the role of PV prosumers. To date, rooftop PV deployment has remained limited, largely concentrated in industrial and commercial buildings. However, an optimal pathway would see prosumers supplying close to 40% of Greater Cairo’s solar PV generation by 2050, equivalent to around 14 GW of decentralized capacity.
Yet this is only part of the picture. Given the megacity’s high energy demand, limited land availability, and competing land uses, inter-regional grid connections become critical. Even with extensive deployment of both rooftop and utility-scale solar PV, Greater Cairo would still need to import up to 80% of its electricity from other regions. One connection stands out in particular: the link to the East Delta, Canal, and Sinai governorates. These areas not only benefit from strong solar resources but also host some of Egypt’s best wind resources. With significantly lower population densities and large expanses of land, they are well positioned to meet their local demand while supplying a substantial share of the megacity’s energy needs. To support this shift, high-voltage transmission capacity along this corridor would need to expand tenfold, reaching around 30 GW by 2050 consistent with a broader national energy transition analysis for Egypt, with the potential to act as a role model for the rest of Africa.
But how can renewable electricity power an entire economy? This is where energy conversion, storage technologies, and overall flexibility measures become essential, enabling full sector coupling and addressing resource variability. In the heat sector, technologies such as electric heaters and heat pumps could directly electrify over 60% of heat demand, covering space heating and cooling, domestic hot water, and some industrial process heat. Solar thermal technologies could supply an additional 14%, while around 20% would rely on the use of e-fuels to meet the high-temperature requirements of industry, where direct electrification remains challenging.
Greater Cairo’s transport sector would also undergo a major transition. Around half of projected transport demand could be directly electrified, covering most road and rail demand. More challenging segments, such as long-haul aviation, would instead rely on e-fuels, including e-diesel, e-kerosene, and e-hydrogen. Once again, Greater Cairo emerges as a net importer, but this time of e-fuels. The results show that only e-hydrogen can be produced economically within the megacity. Other e-fuels, such as Fischer–Tropsch liquids, would be supplied from Upper Egypt, while e-methane would be imported from the Delta governorates.
Maintaining system flexibility will require a diverse mix of energy storage solutions, particularly battery storage, high-temperature heat storage, and hydrogen storage, alongside strong grid interconnections, demand response, sector coupling, and some level of curtailment. Prosumers once again play a central role: around 85% of battery storage output would be from residential, commercial, and industrial installations. Overall, about 15% of Greater Cairo’s energy demand by 2050 would pass through storage first before final consumption, highlighting its critical role in balancing a renewables-based system.
Knowing how a 100% renewable energy-based future looks like for Greater Cairo, what benefits does the megacity stand to gain from this radical transition? From an economic perspective, shifting to a 100% renewable energy system could cut the levelized cost of electricity in half by 2050 compared to current policies, bringing it down to around €30/MWh. These economic gains extend far beyond electricity costs. The transition could save Egypt more than €150 billion in cumulative system costs from Greater Cairo alone, and over €700 billion at the national level, as shown in earlier research on the high cost of slow energy transitions for emerging countries like Egypt.
The transition also brings substantial socio-economic and environmental benefits. It could boost job creation in Greater Cairo by 2050, doubling the current levels. This is driven primarily by operation and maintenance activities, followed by construction and installation. In one scenario, where local generation is prioritized and inter-regional connections are constrained, jobs increase up to threefold. However, this comes at a cost: such a pathway has a relatively worse techno-economic performance and more stranded investments in fossil fuel technologies compared to the optimal, more interconnected system. Concentrating job creation in Greater Cairo would shift opportunities away from other regions, limiting their development potential and reinforcing migration pressures on the capital city.
Greater Cairo’s energy transition could also deliver significant environmental and public health gains. By 2050, it could halve emissions of major air pollutants and pollution-related premature deaths, saving Egypt tens of billions of euros in associated damage costs. CO₂ emissions from the energy system could be effectively eliminated, cutting cumulative emissions by half compared to the current trajectory. On a daily level, residents would benefit from cleaner air, lower urban temperatures, and quieter streets as electric vehicles replace conventional engines. Together, these changes would substantially improve the quality of life in Greater Cairo. The findings for Greater Cairo, the largest megacity in Africa, largely confirm earlier findings for the largest megacity in the world by 2050, New Delhi, with a projected 50 million inhabitants by mid-century.
This study on Greater Cairo is part of a comprehensive energy transition investigation for entire Egypt and its potential to evolve as an e-fuels and e-chemicals exporter. The excellent solar resources and abundant land availability further enable Egypt to emerge as a hub for carbon dioxide removal services. The excellent solar resources could be used to remove CO2 from the atmosphere, creating a net-negative emissions system as a prospective new business case for the country. Another option is greening the desert, i.e., using very low-cost solar PV for seawater desalination to cultivate a forest in today’s Sahara Desert, where a lush and green savanna once existed thousands of years ago. Egypt ranks among the lowest-cost regions in the world for desalination-fed afforestation. Direct air carbon capture and sequestration and desalination-fed afforestation are the two known massively scalable carbon dioxide removal options, while the desert would also allow for scaling enhanced rock weathering. Egypt has an outstanding potential to offer carbon dioxide removal services for the global demand to rebalance anthropogenic emissions within the safe and just planetary climate boundary.
These findings point to a clear conclusion: a rapid shift to renewable energy in Greater Cairo is both feasible and highly advantageous. Accelerating solar PV deployment, incentivizing prosumers, and expanding grid infrastructure are critical. Beyond reducing costs and emissions, the transition would bring tangible benefits, from cleaner air to job creation. However, unlocking this potential requires swift and decisive action. Delay comes at a high cost, while acting now positions the African megacity as a model for solar-driven urban transformation.
Authors: Mai ElSayed, Dominik Keiner, and Christian Breyer
This article is part of a monthly column by LUT University.
Research at LUT University encompasses various analyses related to power, heat, transport, industry, desalination, and carbon dioxide removal options. Power-to-X research is a core topic at the university, integrated into the focus areas of Planetary Resources, Business and Society, Digital Revolution, and Energy Transition. Solar energy plays a key role in all research aspects.
The views and opinions expressed in this article are the author’s own, and do not necessarily reflect those held by pv magazine.
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: [email protected].
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