Keypoints:
- Tanzania now has 4,646MW installed capacity
- Kenya and Zambia emerge as export targets
- UNESCO concerns still shadow mega dam
TANZANIA has formally inaugurated its $2.84bn Julius Nyerere Hydropower Project, cementing a dramatic expansion in electricity supply that officials say could turn the East African country into a regional power exporter while giving industry greater room to grow.
The 2,115MW plant has transformed Tanzania’s electricity supply, lifting installed generation capacity to 4,646MW and leaving the country with substantially more capacity than current peak demand. The bigger test now is whether Tanzania can turn that additional electricity into exports, investment and industrial expansion.
From blackouts to export ambitions
President Samia Suluhu Hassan formally inaugurated the Rufiji River project on Saturday, August 22, describing it as central to Tanzania’s development ambitions.
Reuters reported that national installed generation capacity has risen to 4,646MW, against peak demand of 2,271MW. Energy Minister Deogratius Ndejembi said the difference leaves 2,375MW of surplus capacity and that talks are under way over possible exports to Kenya and Zambia.
The inauguration should not, however, be confused with the start of generation. Africa Briefing reported in 2025 that the Julius Nyerere plant had become fully active, while UNESCO says all nine turbines were operating by April that year.
That distinction matters because Saturday’s ceremony formalised a project already reshaping Tanzania’s electricity system. Government figures cited before the inauguration showed the plant supplied about 44.9 percent of electricity fed into the national grid in the year to May 31, 2026.
Regional power trade takes shape
The 400kV Kenya–Tanzania interconnector was commissioned in December 2024, enabling electricity flows along a growing regional corridor. A separate Tanzania–Zambia interconnector is under development and is intended to create the first physical connection between the Eastern Africa Power Pool and Southern African Power Pool.
That prospect is especially important for Zambia, where drought-driven electricity shortages have weighed on households, mines and businesses. Africa Briefing recently reported on Zambia and Zimbabwe’s revival of the $4.2bn Batoka Gorge hydropower project as the region seeks to strengthen generation capacity.
Tanzania is also deepening regional energy integration elsewhere. A proposed Uganda–Tanzania electricity connection forms part of a wider network of cross-border projects, while Africa Briefing has examined the two countries’ broader energy ambitions around the proposed $20bn Tanga hub.
Surplus is not the same as exports
The 2,375MW figure represents the gap between installed capacity and peak demand, not electricity that can automatically be sold abroad at every moment. Hydropower output varies with water availability, while maintenance, reserve requirements, transmission constraints and commercial agreements will determine how much can actually be exported.
The World Bank says cross-border power trading in Eastern Africa remains below one percent of total demand, highlighting the need for stronger transmission infrastructure and market arrangements before Tanzania power exports can reach their full potential.
Environmental costs remain contested
JNHPP was built on the Rufiji River inside the Selous Game Reserve, a UNESCO World Heritage site. UNESCO’s World Heritage Committee has expressed ‘utmost concern’ over the project’s cumulative and irreversible effects on the reserve’s outstanding universal value and reiterated its opposition to large reservoirs within World Heritage properties.
President Hassan acknowledged opposition to the project during Saturday’s inauguration but said Tanzania could not abandon an undertaking considered vital to national development.
Power now becomes an economic test
For Tanzania, the next challenge is no longer simply whether the giant dam can generate electricity.
It is whether the country can convert its enlarged generation base into dependable industrial power, viable export contracts and greater regional influence. If new interconnectors and trading agreements keep pace with generation, Tanzania’s electricity surplus could become an important source of economic leverage across Eastern and Southern Africa.
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