Kenya Power Explains Wednesday's Blackout, but Bigger Questions About Grid Resilience Remain
Kenya Power has attributed the nationwide blackout that disrupted electricity supply across large parts of the country on Wednesday night to a technical disturbance on the national grid, bringing an end to hours of speculation over what triggered one of the most widespread outages in recent months.
The utility said electricity supply had been fully restored to all affected customers by 2:00 a.m. on Thursday after engineers resolved the fault. Earlier in the night, restoration had begun in phases as substations in Lanet, Naivasha and Juja Road were re-energised before supply gradually returned to Nairobi, the Coast, Mt Kenya and other affected regions.
While Kenya Power has not disclosed the exact component that failed, the incident highlights how critical the national grid has become as Kenya’s electricity network serves a rapidly expanding economy with growing demand from households, businesses and emerging industries.
The national grid links electricity generated from geothermal plants in Olkaria, hydroelectric stations along the Seven Forks cascade, the Lake Turkana Wind Power project and other generating facilities before transmitting power through major substations such as Suswa and Juja to consumers across the country. A fault affecting key parts of that network can interrupt electricity supply across multiple regions within minutes.
The outage comes as pressure on the electricity system continues to build. National peak electricity demand reached a record 2,316MW in February 2025, surpassing the previous record set only a month earlier. At the same time, Kenya Power has continued expanding access to electricity, connecting nearly 200,000 additional customers within six months while preparing to bring hundreds of thousands more onto the grid through ongoing Last Mile connectivity projects.
Demand from electric mobility is also growing quickly. Kenya Power recently disclosed that it has generated KES 382 million in cumulative revenue from EV charging since mid-2023 after electricity sales to the sector expanded sharply. The company has also begun migrating electric vehicle owners to dedicated charging tariffs as it prepares for higher electricity consumption from transport over the coming years.
Beyond transport, wider adoption of electric cooking, continued urban development and industrial expansion are expected to add further demand to the network. These trends are prompting investment in new substations, transmission lines and Battery Energy Storage Systems, which are intended to improve reliability by storing electricity for use during periods of high demand while supporting greater integration of renewable energy.
Projects under development include battery storage pilots by KenGen, planned battery installations by KETRACO at strategic substations and transmission upgrades designed to strengthen electricity supply around Nairobi and other fast-growing regions. Kenya Power has also continued expanding digital monitoring systems that give network operators greater visibility into changing electricity demand across the country.
The government is simultaneously pursuing longer-term investments to expand generation capacity. Alongside continued growth in geothermal, wind and solar power, Kenya maintains plans to introduce nuclear energy in the 2030s as part of its long-term electricity strategy. While nuclear generation would increase available power supply rather than prevent transmission faults like the one reported on Wednesday, it forms part of broader efforts to meet rising electricity demand while improving energy security.
Wednesday night’s outage serves as a reminder that expanding electricity access involves more than adding new generation capacity. As more homes, businesses, factories and electric vehicles connect to the network, maintaining a resilient transmission and distribution system becomes just as important. For Kenya Power, keeping the grid stable while demand continues to climb will remain one of the country’s most significant infrastructure challenges over the rest of the decade.
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