Kenya Power Sounds Alarm Over Variable Renewable Expansion and Grid Stability

Kenya Power has called for a cautious approach in expanding variable renewable energy sources such as wind and solar, warning that their intermittent nature could expose the national electricity grid to instability and increase the cost of power for consumers. The company stated that wind and solar currently account for about 34 per cent of the energy mix during peak daytime demand of approximately 1,900 megawatts, rising to 36 per cent when demand falls to about 1,200 megawatts. According to the utility, sudden fluctuations in wind and solar generation can affect the frequency and voltage of electricity supplied through the national grid, forcing the company to dispatch additional generation sources to maintain system stability.

Kenya Power Managing Director and Chief Executive Officer Dr Eng Joseph Siror said the country needed to carefully consider the costs associated with integrating additional intermittent renewable energy into the grid. Global benchmarks point to a limit of 15 per cent of the grid's total firm capacity limit for variable renewable energy. The current system under the take-or-pay model of power purchase has led to an increase in variable renewable energy sources to over 20 per cent against a recommended average of 15 per cent. Siror noted that the intermittent nature of wind and solar meant Kenya Power was sometimes forced to dispatch and pay for additional generators even when renewable sources were producing electricity, which increases the overall cost of power.

The utility currently deploys additional generation plants at extra cost whenever wind and solar production suddenly drops or rises in order to prevent instability or possible collapse of the grid. While battery storage could help address some of the challenges associated with variable renewable energy, storage systems would also require reliable sources of electricity to charge them when renewable generation falls. Siror argued that the cost of variable renewable energy should therefore be assessed alongside the additional generation required to stabilise the grid. He recommended increased investment in geothermal and hydroelectric generation, which offer greater stability and can help the electricity system recover when intermittent renewable sources are unavailable.

Kenya currently has the highest dependence on variable renewable energy among countries in the Eastern Africa Power Pool, according to Kenya Power. Variable renewable energy accounts for about 10.4 per cent in Egypt, 5.3 per cent in Ethiopia, four per cent in Uganda and 1.2 per cent in Tanzania, compared with Kenya's significantly higher proportion. The utility is advocating for increased baseload generation to provide a more stable supply and cushion the grid against fluctuations from intermittent renewable sources. Among the projects expected to add baseload capacity are KenGen's Olkaria I expansion with 61 megawatts, Olkaria VII with 80 megawatts, Globeleq Menengai with 35 megawatts, OrPower 22 Menengai with 35 megawatts, 200 megawatts of electricity imports from Ethiopia, the 100 megawatt Paka Silali project by the Geothermal Development Company and the 28 megawatt Nabuyole project. Other baseload projects in the pipeline include a proposed 300 megawatt liquefied natural gas power plant, the 700 megawatt High Grand Falls project and the 90 megawatt Karura Falls project.

Why This Matters

The debate over grid integration limits and the financial mechanics of take-or-pay power purchase agreements highlights the complex trade-offs facing utilities managing the energy transition. As nations strive to green their generation mix, the physical realities of maintaining electrical frequency and voltage impose hard operational constraints. When variable renewable penetration exceeds recommended benchmarks without adequate balancing capacity, system operators face severe technical vulnerabilities that can threaten total grid collapse if unmanaged.

Furthermore, the economic implications of maintaining redundant thermal or fossil-fueled spinning reserves to offset renewable intermittency introduce structural cost burdens. Consumers ultimately bear these financial externalities through tariffs, complicating national policy goals of delivering affordable electricity to drive industrialization. Balancing decarbonization targets with system reliability requires rigorous planning around storage, baseload diversity and transmission infrastructure resilience.

Opportunities

• Baseload Contractors: Engineering and construction firms specializing in geothermal, hydroelectric and liquefied natural gas infrastructure can secure major project pipelines as the utility prioritizes stable baseload additions.
• Energy Storage Integrators: Technology providers specializing in utility-scale battery energy storage systems have clear commercial openings to deploy solutions that help mitigate renewable intermittency, provided reliable charging sources are integrated.
• Project Financiers: Financial institutions and investors can engage in structuring capital for upcoming generation projects such as the Olkaria expansions, Geothermal Development Company initiatives, and regional power imports.

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