Financing the Last Mile: Solar for All in Rural Sub-Saharan Africa

The economics of off-grid solar in sub-Saharan Africa have transformed dramatically over the past decade. The levelised cost of a household solar system has fallen by more than 80% since 2010, and mobile money platforms have made pay-as-you-go financing accessible to households that have never held a bank account. Yet 600 million people across the continent still live without reliable electricity, and the pace of new connections is slowing.

The fundamental challenge is not technology — it is financing. The business models that have worked in East Africa's relatively prosperous rural markets (Kenya, Tanzania, Rwanda) struggle to translate to lower-income, lower-population-density contexts in the Sahel, the DRC interior, or rural Mozambique. Consumer credit risk is higher; logistics costs are punishing; and the productive-use revenues that make repayment predictable in agricultural communities are absent in purely subsistence contexts.

Several models have shown genuine promise. Results-based financing frameworks — where development finance institutions disburse against verified connections rather than inputs — have proven effective in Ethiopia and Nigeria, aligning commercial operator incentives with development outcomes. Aggregated procurement through government tenders, pioneered in Sierra Leone and Tanzania, has driven down hardware costs by 30-40% and simplified supply-chain logistics.

The most exciting frontier is productive-use equipment: irrigation pumps, grain mills, cold storage, and small industrial loads that generate income enabling households to repay higher credit amounts. CLEEN's own programme work in rural Kenya and northern Uganda demonstrates that households with productive-use appliances repay at 94% rate versus 71% for those with only lighting and phone-charging loads.

The financing gap is real but not insurmountable. What the sector needs most is patient first-loss capital from development finance institutions, willingness among commercial banks to lend to proven off-grid operators against aggregated receivable portfolios, and regulatory frameworks that give investors confidence in the rules of the game. Each of these is achievable — and in some markets, already being achieved.