Kenya has built one of Africa’s most diverse electricity systems, combining geothermal, hydropower, wind, solar, thermal generation and cross-border imports. The main infrastructure question is no longer only how to add generating capacity. It is how to move power from distant resource zones to Nairobi, Mombasa, western counties and communities beyond the strongest parts of the grid.
As of December 2025, Kenya had about 3,193 MW of interconnected generating capacity and total installed capacity of approximately 3,869 MW when captive and off-grid systems are included. Geothermal was the largest individual source, with about 940 MW installed, while wind contributed more than 435 MW. Much of this generation is far from the largest demand centres.
This geography creates a transmission-led system. Steam fields around Olkaria, wind generation near Lake Turkana, hydropower stations and imports from Ethiopia must all be carried across long distances. When lines are delayed or congested, available generation cannot always reach consumers. Kenya’s energy transition therefore depends as much on substations, high-voltage corridors and system control as it does on new power plants.
Geothermal and Wind Need Stronger Transmission Routes
Olkaria is the foundation of Kenya’s geothermal industry and one of East Africa’s most important power-producing areas. Geothermal plants provide steady electricity that is not dependent on daily sunlight or short-term wind conditions. Their output must be transmitted from the Rift Valley toward Nairobi, western Kenya and the Coast.
By May 2025, Kenya’s transmission system at 132 kV and above had reached approximately 9,717 circuit kilometres. The Kenya Electricity Transmission Company, or KETRACO, owned and operated about 6,016 kilometres and had commissioned 44 new substations with 6,487 MVA of transformation capacity.
Large lines connect Olkaria with Suswa, Nairobi and western regions. Suswa has become especially important because it receives geothermal and wind power and connects with regional interconnectors. The 400 kV Loiyangalani–Suswa line allows electricity from the Lake Turkana Wind Power project to enter the main grid after travelling from northern Kenya.
The next stage is intended to create alternative routes. A planned 400 kV Lessos–Loosuk line will provide another path for up to 300 MW of Lake Turkana wind generation and support future North Rift geothermal development. A separate 220 kV Kibos–Kakamega–Musaga line will extend high-voltage capacity deeper into western Kenya, where long medium-voltage routes have limited reliability.
The Nairobi–Mombasa Corridor Becomes a Power Artery
Mombasa and the surrounding industrial, tourism and port economy are major electricity consumers, but much of Kenya’s lowest-cost generation is inland. Weak transfer capacity historically increased the Coast’s dependence on local thermal plants and made the system more vulnerable to outages and voltage instability.
The Nairobi–Mombasa transmission project addresses this imbalance through a corridor linking Embakasi, Athi River, Isinya, Mariakani and Rabai. The energization of the 400/220 kV Mariakani substation in December 2025 completed an important stage.
Operating the Isinya–Mariakani section at 400 kV raises transfer capability to more than 1,000 MW. This allows more geothermal, wind and hydropower to reach coastal consumers, reducing pressure on local diesel generation. It also supports manufacturing, port operations, hotels, logistics facilities and future industrial development.
The project shows why transmission affects cost as well as reliability. Moving more lower-cost power reduces the need to dispatch expensive thermal plants during constrained periods. Higher-voltage lines also reduce technical losses compared with carrying the same power through weaker networks.
Regional Interconnectors Turn Kenya into an Electricity Hub
Kenya’s grid is becoming part of a wider East African market. The 500 kV Ethiopia–Kenya high-voltage direct-current interconnector gives Kenya access to Ethiopian hydropower. The 400 kV Kenya–Tanzania interconnector strengthens the southern connection and supports future trade through the Eastern Africa Power Pool.
These links improve energy security because Kenya can import power when domestic hydropower is affected by drought or demand rises quickly. They may also create export opportunities when Kenya has surplus geothermal, wind or solar output. Regional trade allows each country to use a broader mix of resources instead of building enough domestic capacity for every possible condition.
Interconnectors do not remove the need for internal investment. Electricity arriving at a border or converter station must still move through the national grid. Projects at Mariakani, Suswa and in western Kenya are necessary if regional power is to reach major demand centres without creating congestion elsewhere.
Access Has Expanded Faster Than Network Quality
National electricity access increased from 37 percent in 2013 to 79 percent in 2023, while urban access reached full coverage. The Last Mile Connectivity Project helped extend service to around nine million rural residents by using existing transformers and distribution lines to connect nearby households.
The remaining gap is more difficult. Many unserved communities are remote, sparsely populated or far from the national network. Extending conventional lines can be expensive, giving mini-grids, standalone solar systems and local storage an important role. One in five Kenyan households already uses a solar mini-grid or standalone system.
Connection alone does not guarantee reliable service. Distribution faults, overloaded transformers, voltage variation and technical losses can reduce the value of access for households and businesses. Kenya’s next phase must improve service quality while adding customers. This requires closer coordination between KETRACO’s high-voltage network, Kenya Power’s distribution system, generators and county development plans.
Mombasa Is Also the Entry Point for Petroleum
Although Kenya’s power system is increasingly renewable, the country still depends on imported petroleum for transport, aviation, industry and backup generation. Most fuel enters through the Port of Mombasa, making coastal terminals and inland pipelines central to energy security.
The Kipevu Oil Terminal is an offshore facility with four berths and infrastructure for diesel, petrol, aviation fuel, heavy fuel oil, crude oil and liquefied petroleum gas. It can accommodate three ships at the same time and handle vessels of up to 170,000 deadweight tonnes. Six onshore pipelines connect the terminal with storage facilities.
Kenya Pipeline Company moves refined products inland through approximately 1,342 kilometres of pipeline. The system includes storage depots, pumping stations and loading facilities serving Nairobi, Nakuru, Eldoret and Kisumu, with annual transportation capacity of about 14 billion litres.
This network also supports regional trade. Products delivered through Mombasa and the pipeline system supply inland markets and neighbouring countries. The Kisumu Oil Jetty adds a Lake Victoria route that can reduce dependence on road tankers for cross-border deliveries.
Financing Will Decide the Speed of Expansion
Kenya’s transmission plan includes thousands of kilometres of additional lines and major new substation capacity. Public borrowing limits make traditional state-financed construction harder, pushing KETRACO toward public-private partnerships and other financing models.
The $311 million agreement for the Lessos–Loosuk and Kibos–Kakamega–Musaga lines is an important test. Private partners will finance, build, operate and maintain the infrastructure during a 30-year concession, while KETRACO makes performance-linked availability payments. The model could accelerate projects without requiring the full construction cost from the public budget at the start.
Kenya’s infrastructure priorities are closely connected. Renewable generation, regional electricity trade, urban growth, last-mile access and petroleum logistics all depend on reliable networks. The next challenge is to ensure that transmission, distribution and fuel transport capacity expand where economic and population growth are creating demand.
Well-planned lines and pipelines can reduce losses, lower generation costs, improve resilience and support regional trade. Delayed or poorly coordinated projects can leave generation stranded and consumers connected to an unreliable system. Kenya’s position as an East African energy centre will depend on closing that infrastructure gap.