A solar company can install panels in a village in Kenya or Sierra Leone. What it often can’t do is finance the inventory, working capital, and receivables needed to reach the next thousand households. This is the “missing middle”, too large for microfinance, too small and too risky for commercial banks. And the scale of the gap is staggering.
Around 597 million people in sub-Saharan Africa, roughly 40% of the region’s population, still don’t have access to electricity. That’s about 83% of the world’s un-electrified population, most of them in remote, fragile, or conflict-prone communities far from any grid. The economic toll is real: low-income African households spend an estimated $6.5 billion a year on inefficient lighting like kerosene lamps and candles.
Off-grid solar finance is rewriting that story. Looking ahead, it is projected to be the most cost-effective option for 41% of those still lacking energy access by 2030. The sector’s own gatherings echo this momentum, SIMA’s recap of the 5 key takeaways from Unlocking Solar Capital Africa captures where the financing conversation is heading.
So why the funding gap? Annual investment in off-grid solar across emerging markets was only about $300 million in 2024, against an estimated $21 billion a year needed to reach everyone who could most efficiently be served by it. Closing that distance is exactly where impact investing earns its name. The catch is structural: as SIMA argues in Subsidy and Synergy: How Philanthropy Can Complement Impact Investing, the rush toward purely commercial, market-rate capital has thinned out the patient, blended money the sector actually needs.
Blended finance structures, pairing concessional and commercial capital, let development finance investors absorb early risk and crowd in larger players, while last-mile distributor funding sits squarely at the intersection of climate action and financial inclusion.
The appetite is there. Global impact investing assets have grown at a 21% compound annual rate since 2019, reaching roughly $1.6 trillion in AUM, with energy now the single most targeted sector, 57% of impact investors made at least one energy investment last year.
For institutional capital, the question is no longer whether off-grid solar works. It’s whether funds are structured patiently enough to scale it. That’s the gap SIMA built the Emerging Distributor Finance Fund to close, channeling capital directly to the last-mile solar distributors that traditional lenders overlook.
Well-designed energy access funds don’t just light homes; they build the financial rails that let entire double-bottom-line markets grow.