ICC Tribunal Dismisses Sunrise Power’s $2.35 Billion Claim Against Nigeria

Nigeria has won a landmark US$2.35 billion international arbitration case brought by Sunrise Power and Transmission Company Limited, bringing to a close one of the country’s most closely watched investment disputes over the proposed Mambilla Hydroelectric Power Project.

The arbitration, heard before the International Chamber of Commerce (ICC) in Paris, centred on Sunrise Power’s claim that the Nigerian government breached contractual obligations relating to the development of the long-delayed Mambilla power project. The tribunal ultimately dismissed the company’s claims and ruled in favour of Nigeria, sparing the country from what would have been one of its largest arbitration liabilities.

The Office of the Attorney General of the Federation described the outcome as a significant legal and financial victory, saying it protected public resources and reaffirmed Nigeria’s position in the dispute. Officials said the judgment followed years of legal proceedings involving extensive documentary evidence and international arbitration hearings.

The disagreement dates back to agreements surrounding the 3,050-megawatt Mambilla Hydroelectric Power Project, one of Nigeria’s largest planned electricity infrastructure projects. Sunrise Power maintained that it held contractual rights linked to the project and sought billions of dollars in damages, while the Federal Government disputed the validity and enforceability of those claims.

For years, the arbitration raised concerns among investors and policymakers because of the potential financial exposure facing Nigeria. A successful claim could have resulted in a substantial payout funded from public resources, alongside broader implications for investor confidence and government infrastructure contracts.

Legal analysts say the ruling removes a major contingent liability from Nigeria’s books at a time when the government is pursuing fiscal reforms, infrastructure investment and increased power generation. The avoided US$2.35 billion payment represents a significant financial reprieve for Africa’s largest economy.

The Mambilla project itself remains strategically important to Nigeria’s energy ambitions. Once completed, it is expected to become the country’s largest hydroelectric facility, providing thousands of megawatts of renewable electricity and helping to strengthen the national grid, although construction has faced repeated delays over financing, contractual and legal challenges.

The arbitration victory also follows Nigeria’s broader effort to improve its record in international commercial disputes after previous high-profile cases, including the P&ID arbitration, highlighted the enormous financial risks associated with contractual litigation involving sovereign governments.

Beyond the immediate legal success, the decision reinforces the importance of transparent contracting, effective dispute resolution and robust legal representation in safeguarding national interests. As Nigeria continues to pursue large-scale infrastructure partnerships, the judgment is likely to influence how future public-private agreements are negotiated and defended on the global stage.