African solar does not rely on blended finance because projects fail, but because system risks persist. This framework explains why structures repeat and how markets eventually mature.
For years, investors in African solar have found themselves caught in a familiar loop. Technology costs have fallen sharply, demand from commercial and industrial users is real, and operating models such as power purchase agreements are no longer experimental. Yet when projects are aggregated into funds and presented to larger pools of capital, the same conclusion repeatedly emerges: some form of blended finance is still required. This is often described as a temporary inconvenience, a market inefficiency that will soon disappear. A recent learning resource by British International Investment and Boston Consulting Group suggests something more structural is at work.
The report's central contribution is not the claim that blended finance is useful. That point has been widely accepted for years. Its more important contribution is that it explains why blended finance keeps reappearing in similar shapes, particularly in emerging markets, and why attempts to bypass those shapes usually fail. In doing so, it reframes the conversation away from moral debates about subsidy and toward a more practical discussion about how risk is absorbed, priced, and transferred between different types of capital.
At its core, the report is an attempt to impose order on a field that has become overly bespoke. Blended finance structures are frequently designed as one-off solutions, negotiated project by project and fund by fund, with little effort to standardise expectations or reference points. This has made them slow to execute, expensive to manage, and difficult to scale. The authors argue that most blended finance vehicles already fall into a small number of recurring patterns, and that recognising these patterns early can dramatically reduce friction in fund design, fundraising, and execution.
This matters directly for African solar. The sector is mature enough that investors are no longer debating whether solar works. What they are debating is whether the surrounding systems in which solar operates are predictable enough to support large volumes of long-term capital without explicit protection. That distinction, between project risk and system risk, explains why Africa remains concentrated in what the report calls "Targeted mobilisation".
What the report is actually trying to solve
The BII–BCG paper begins from a simple observation. Despite years of policy attention and growing investor interest, blended finance has mobilised only a fraction of the private capital needed for development and climate goals. Annual mobilisation is estimated at roughly $15 billion, far below global requirements. The authors argue this gap exists not because private investors lack interest, but because the way blended finance is structured often introduces unnecessary complexity and uncertainty.
Institutional investors, in particular, operate under hard constraints. Regulatory capital requirements, internal risk limits, asset allocation rules, and fiduciary duties sharply limit their ability to absorb downside risk or engage with bespoke structures. The report makes clear that institutional hesitation is often misinterpreted as a lack of appetite, when it is more accurately a reflection of binding rules and incentive systems.
This distinction is crucial for solar developers and fund managers. Many fundraising efforts fail not because the underlying projects are weak, but because the capital stack implicitly assumes a level of risk tolerance that certain investors simply do not have. When those assumptions are wrong, negotiations drag on, governance becomes tangled, and deals either collapse or emerge so heavily subsidised that they cannot be repeated.
The report's response is not to simplify blended finance by removing concessional elements, but to simplify it by classifying it. Instead of treating each fund as unique, the authors introduce a typology that reflects how most blended vehicles already behave in practice. This typology is presented as Tool 1.
Tool 1 and the logic of archetypes