Rwanda’s proposed 200-megawatt floating solar power plant on Lake Sake is an opportunity to mobilise private capital, deepen domestic participation in the energy sector and accelerate the country’s transition towards a more secure, reliable and sustainable electricity supply. With an 800-megawatt-hour battery energy storage system, the project addresses one of solar energy’s principal limitations, which is intermittency. By storing electricity for use during evening peak demand, the facility could reduce wasted solar generation, improve grid stability and strengthen the reliability of electricity supplied to households and businesses. Its proposed connection to the national grid further positions it as a strategic investment in Rwanda’s productive capacity. The commercial case is compelling. Rwanda intends to increase installed electricity generation capacity to approximately 1,066 megawatts by 2034, while achieving universal electricity access. These ambitions will require substantial capital, technical expertise and innovative financing beyond what public resources alone can sustainably provide. Under the proposed independent power producer model, a long-term power purchase agreement with the Rwanda Energy Group offers investors a contractual framework around which to assess project revenues, financing and risk. Yet the opportunity should not be viewed exclusively through the lens of international developers. The challenge is to attract foreign expertise without relegating domestic investors to the margins of a project with long-term national economic implications. The prequalification requirements, including ten years of relevant experience, average annual turnover of at least $300 million and access to substantial financing, present a formidable barrier for most Rwandan companies. However, this need not translate into exclusion. Local investors should explore joint ventures with experienced international developers, combining domestic capital, knowledge of the operating environment and local networks with established technical capabilities. Although the tender permits joint ventures of no more than two members, investors can organise strategically around that requirement. Local institutional investors and financial institutions could also explore participation through suitable investment structures, subject to the project’s financing arrangements and applicable regulations. Beyond direct equity participation, opportunities exist for local engineering firms, construction companies, electrical contractors, logistics providers and professional services firms to compete for subcontracting and supply-chain contracts. Skills transfer, local workforce development and technology partnerships should form part of these arrangements. The government and project sponsors, for their part, should facilitate meaningful domestic participation through investor engagement and clear expectations for local content, without compromising technical standards or financial viability. Lake Sake must ultimately deliver reliable electricity at a competitive cost. But success should also be measured by how much domestic investment, expertise and enterprise it mobilises.