Financing Mechanisms for Off-Grid Solar Businesses in South West Nigeria: Lessons from Practice

Private off-grid solar businesses serving underserved markets in South West Nigeria require innovative financing mechanisms to overcome the dual challenge of high upfront system costs and the limited creditworthiness of low-income customers in rural and peri-urban communities. This study examines financing mechanisms applied by off-grid solar businesses operating in Oyo, Osun, and Ekiti States, analysing the effectiveness of pay-as-you-go models, microfinance partnerships, asset financing, and grant co-funding arrangements in expanding market reach and ensuring business sustainability. Case study analysis was conducted for eight off-grid solar enterprises at varying scales, drawing on financial performance data, customer portfolio information, and interviews with enterprise managers and financiers. A financial model was constructed for each business to assess revenue adequacy, portfolio-at-risk levels, and capital structure sustainability under alternative financing scenarios. Results demonstrate that pay-as-you-go models anchored by mobile money payment infrastructure achieve the highest customer reach, with non-payment default rates below 8 percent when supported by remote monitoring and disconnection systems. Microfinance partnerships reduce effective interest rates for customers by 35 percent compared to proprietary instalment schemes. The study identifies working capital constraints as the principal bottleneck for scaling operations and recommends a dedicated off-grid energy finance facility under the Central Bank of Nigeria's development finance initiatives. Keywords: off-grid solar, financing mechanisms, pay-as-you-go, South West Nigeria, microfinance.