Hydro-solar integration stabilising Northern Cameroon's grid — a 40 MWc solar plant with 24.38 MWh battery storage adjacent to the Lagdo hydroelectric dam.
Lagdo Solar is a 40 MWc ground-mounted photovoltaic power plant to be constructed immediately adjacent to Cameroon's Lagdo hydroelectric dam, located in the Région du Nord. The project addresses a documented structural deficit in the Northern Interconnected Network (RIN — Réseau Interconnecté Nord), which serves the Adamaoua, North, and Far-North regions and suffers from chronic production shortfalls driven by the hydroelectric dam's seasonal and climate-related output variability.
By combining solar generation with 24.38 MWh of Lithium Iron Phosphate (LiFePO4) battery storage (BESS), Lagdo Solar provides both baseload-displacing energy and grid stabilisation services — the precise complement to an existing hydro asset whose output becomes unreliable during the dry season. The solar plant will inject into the existing Lagdo substation at a distance of less than 2 km, minimising transmission infrastructure costs.
Strategic rationale: The ENEO operator currently compensates for the RIN deficit by running diesel thermal generation at a cost of 240–300 FCFA/kWh. Lagdo Solar's tariff of 46 FCFA/kWh (66 FCFA/kWh with storage dispatch) delivers approximately 75% in cost savings to the national utility and the State, generating an estimated €12–15 million per year in reduced fuel subsidy expenditure.
The Northern Cameroon Solar Programme, of which Lagdo Solar forms the larger component, is designed to generate substantial developmental co-benefits alongside financial returns. These metrics are derived from the project's Investment Memorandum and are presented as developer projections.
Cameroon holds the second-largest hydroelectric potential in sub-Saharan Africa, yet its electricity network is divided into three structurally independent grids. The RIN, which serves the country's northern regions, is characterised by chronic under-supply driven by the declining productivity of the Lagdo dam — itself affected by sedimentation and increasingly variable rainfall patterns. This dependence on a single aging hydraulic asset creates annual "low water crises" during the dry season, forcing ENEO to run expensive diesel backup generation.
The regulatory framework is governed by the 2011 Electricity Sector Law, which actively encourages Independent Power Producer (IPP) participation. The sector's oversight is divided among the MINEE (Ministry of Water and Energy, policy), ARSEL (regulator), and SONATREL (transmission operator). Both Lagdo and Figuil Solar are classified as priority projects within the national electricity sector development plan (PDSE 2030) and benefit from authorisations at Presidential and Prime Ministerial level, as well as a signed Memorandum of Understanding with the MINEE.
The technology selection for Lagdo Solar reflects the operating conditions of the Sahel — high direct irradiance, elevated ambient temperatures, and dust accumulation — while maximising energy yield through proven performance-enhancing solutions. Every component specification is oriented towards 25-year operational longevity with minimal degradation.
The financial model for Lagdo Solar is built on a 25-year operating period with conservative assumptions on module degradation (0.4% annually) and a 3-year debt grace period. The 75/25 debt-to-equity structure, anchored by concessional finance from multilateral institutions, substantially reduces the cost of capital and amplifies equity returns relative to an all-equity structure.
Sensitivity note: A 10% increase in CapEx reduces the equity IRR by approximately 1.8%, maintaining returns above 16%. A 5% reduction in energy production impacts equity IRR by approximately 2.1%. The use of satellite-validated irradiance data and on-site studies is intended to minimise this production uncertainty.
Lagdo Solar is structured as a public-private partnership (PPP) under a Build, Own, Operate, Transfer (BOOT) concession. The contractual architecture layers payment security, construction guarantees, and operational protections to address the risk profile typically associated with infrastructure investment in sub-Saharan frontier markets.
Santi Capital facilitates introductions to Rubis Group Limited for qualified institutional investors interested in the Northern Cameroon Solar Programme.
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