The Energy Transition: Financing the Energy Transition

Series 2: The Energy Transition 

The Energy Transition is a series that reframes energy as the physical system underpinning the transition economy. It examines how power is generated, moved, stored, and priced- and how this energy system architecture shapes risk, return, and the durability of capital across the transition landscape.

Article 2: Financing the Energy Transition

The ‘financing gap’ of the energy transition is a structural capital engineering challenge. 

Early-stage energy assets begin with uncertain development exposures. Traditional project finance requires contracted revenues and defined construction timelines while, by contrast,  venture capital typically seeks shorter deployment cycles than 4-5 year infrastructure development allows. Between these mandates sits what practitioners describe as the “missing middle”(OECD,2021): development-stage capital that does not yet meet bank underwriting standards but requires patient horizons. Financing the energy transition therefore hinges on risk migration down the capital stack: who absorbs first-loss risk, and how efficiently early-stage uncertainty can be structured into infrastructure-grade yield to mature fragmented markets. 

In discussion with Linh Tran, Portfolio Manager at Clime Capital, this article reframes the gap into three distinct capital engineering challenges aligned with the physical layers of the power system: development-stage capital before financial close, scale mismatch between project size and institutional mandates, and the pathway from subscale platforms into refinanceable infrastructure. 

1. Asset Development: Manufacturing Bankability

Asset development moves a renewable project from concept to financial close. It includes land control, permitting, resource assessment, grid interconnection approval, and negotiation of power purchase agreements (PPAs). Capital is deployed without operating cash flow and often before regulatory certainty is secured.

This is where risk concentrates.

At this stage, it is important to distinguish between two asset classes:

(i) utility-scale projects, which rely on long-term PPAs and reach financial close prior to construction, and
(ii) distributed or rooftop solar portfolios, which scale incrementally and aggregate over time.

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These asset classes face fundamentally different financing constraints and require distinct capital structuring approaches. 

In utility-scale projects, bankability is primarily a legal-structural question embedded in the PPA. A 20-year contract does not automatically create bankable revenue. Curtailment provisions, weak offtake obligations, and the credit profile of the off-taker materially affect how lenders underwrite cash flows. In many Southeast Asian markets, these contractual dynamics are shaped by sovereign or quasi-sovereign utilities, where structural limitations are often well understood but not easily renegotiated.

In distributed and smaller-scale portfolios, by contrast, bankability is less a function of legal structure and more a function of financing constraints. Projects may be economically viable but unable to secure sufficient capital independently, often requiring corporate-level financing or support from holding structures. This limitation slows deployment and constrains the pace of the transition.

Development capital must absorb early volatility in a way that allows the asset to refinance once milestones are achieved (IFC,2025; Convergence, 2025). Convertible instruments, staged capital disbursement tied to permitting and commissioning progress, and junior positioning within the capital stack allow risk to be intentionally concentrated before being distributed.

Development capital must therefore absorb early volatility in a way that allows assets to reach financial close.

For utility-scale projects, this typically involves junior equity or blended finance structures that de-risk projects sufficiently to crowd in institutional capital at financial close. The role of catalytic capital is central: absorbing early-stage uncertainty so that senior lenders can enter once key risks- permitting, grid connection, and contractual revenue- are resolved.

For distributed and small-scale portfolios, instruments such as staged capital deployment and convertible structures are more commonly used. These reflect the incremental nature of portfolio build-out and the relatively lower risk at the individual asset level. Capital is deployed progressively, aligned with asset growth and performance milestones.

In Southeast Asia’s commercial and industrial solar segments, this sequencing has proven essential. When early-stage exposure is structured deliberately, risk can be concentrated, managed, and ultimately transitioned into assets capable of attracting larger pools of capital (UNDP, 2020; Jadidi, 2025).

2. Infrastructure Operation: Solving Scale Mismatch

Once assets become operational, risk shifts from development uncertainty to performance and execution. Cash flows stabilise, and capital structures begin to evolve.

For utility-scale projects, this is typically where senior project finance debt is introduced, supported by contracted revenues and established asset bases. For distributed portfolios, however, capital structures often remain equity-heavy in earlier stages, with participation from development finance institutions and private investors before leverage becomes viable.

At this stage, a second constraint emerges: scale mismatch.

Distributed generation assets-rooftop solar portfolios, embedded energy systems, and efficiency platforms-are individually subscale relative to institutional mandates. Pension funds, insurers, and large asset managers require deployable capital at scale, often in the range of tens or hundreds of millions. A fragmented pipeline of US$1-5 million assets does not meet this threshold.

In developed markets, exposure may centre on 200–300 MW assets or established portfolios. In parts of Southeast Asia, viable projects are often significantly smaller— 1-15 MW — due to grid constraints and demand characteristics. These assets may be economically sound, but they remain too fragmented for direct institutional underwriting (Climate Bonds Initiative, 2020; Crédit Agricole CIB, 2022).

Aggregation becomes a capital solution.

By consolidating operational assets into diversified portfolios, developers create scale, smooth cash flows, and reduce transaction costs. This process transforms fragmented assets into investable platforms capable of attracting lower-cost capital.

In distributed portfolios, equity can be partially recycled as portfolios mature and stabilize, allowing early-stage capital to be redeployed into new development pipelines. Over time, these platforms may transition toward leverage as asset bases strengthen and cash flows become sufficiently predictable.

As Tran emphasises, operational discipline is as important as asset performance. Institutional capital requires visibility- governance structures, ESG frameworks, and reporting systems established early in the asset lifecycle often determine whether refinancing or scaling can occur.

In this sense, governance discipline is a precondition for capital access.

3. Energy Delivery & Enabling Infrastructure: Financing the System

Beyond generation and distributed portfolios sits the enabling layer: storage, grid services, demand-side management, and digital energy infrastructure. The value of these assets lies in their system reliability and flexibility and present a different profile.

These assets are fragmented, customer-facing and operationally complex. Revenue ramps gradually. Utilisation builds over time. They rarely generate immediate positive cash flow, making them ill-suited to short-horizon Financing requires underwriting market design risk - how tariffs evolve, how ancillary services are priced, and how regulatory frameworks mature (IEA,2023).

Here, the third capital engineering challenge appears: enabling infrastructure that underpins system reliability but lacks early cash flow visibility.

Catalytic capital structures play a different role here. Rather than merely absorbing construction risk, they often absorb policy timing risk. Staged deployment aligned with regulatory milestones allows investors to participate in system-building without taking binary exposure (Dai, A., 2025; Garttan, G.et.al, 2025).

As Tran observes, markets do not mature linearly. “Capital has to move in advance of full regulatory clarity – but not recklessly. You structure in a way that allows adaptation and scaling up.”

Across markets, investment effectiveness increasingly depends on pairing capital with targeted technical assistance that addresses persistent capacity gaps. Although substantial funding is available, many high-potential climate projects fail to reach bankability due to insufficient technical support both before and after investment.

Pre-investment support- including feasibility assessments, market mapping, and grid or storage analysis- reduces entry risk and converts early-stage concepts into a viable pipeline. Post-investment assistance is equally critical, strengthening governance, ESG systems, and operational capabilities so that companies can scale responsibly and attract follow-on capital.

When delivered at a portfolio level rather than on a deal-by-deal basis, this support becomes significantly more efficient and durable: accelerating commercial viability, catalysing additional capital, and enabling system-level transition.

The Risk Transformation Principle

Across all layers, the same mechanism governs capital mobilisation: early-stage risk must migrate down the capital stack over time.

Effective transition financing models share structural features:

• First-loss tranches that absorb initial downside
• Milestone-based capital staging aligned to regulatory milestones and validated business model performance
• Governance and ESG discipline as prerequisites for scaling and refinancing
• Introduction of leverage once assets are established on balance sheet and cash flows have stabilised, enabling lenders to underwrite against secured, mortgageable assets
• Clear pathways for equity recycling

Understanding where an asset sits within this progression is essential to pricing risk correctly.

For private equity, credit funds, and development finance institutions, the opportunity lies in structuring mechanisms that enable this migration. For pension and insurance capital, the opportunity lies in entering once volatility has been engineered into predictability.

For investors operating at scale, the implication is clear: capital structure is the gating factor on deployment speed.

Development finance and philanthropy can catalyse markets, but private capital must ultimately scale them. Alignment across the capital stack is therefore not optional. It is the condition for transition.

For investors operating at the top of the capital stack, the implication is capital structure architecture. Solving this alignment problem is the gating factor on deployment speed. Development finance and philanthropy can catalyse markets, but private capital must ultimately scale them. Collaboration across the capital stack is therefore not optional.

At éthica Capital and GBC Group, we analyse the transition through this lens: how risk is sequenced across physical energy layers, how catalytic tranches crowd in institutional yield capital, and where structured capital can accelerate deployment. Our Energy Transition Industry Report examines grid architecture and infrastructure capital flows, while our Critical Minerals Industry Report explores the upstream material foundations of electrification. Together, they provide a capital allocation framework across energy systems and the resources that underpin them.

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Citations

Bock, G. (2025) ‘Vietnam Rooftop Solar Company Stride Completes Series A Funding Round’, Climate Insider, 24 March. Available at: https://climateinsider.com/2025/03/24/vietnam-rooftop-solar-company-stride-completes-series-a-funding-round/ (Accessed: 20 February 2026).

Climate Bonds Initiative (2020) ASEAN Sustainable Finance: State of the Market 2020. Climate Bonds Initiative. Available at: https://www.climatebonds.net/files/documents/publications/ASEAN-Sustainable-Finance-State-of-the-Market-2020.pdf 

Crédit Agricole CIB (2022) Project Bond Focus: U.S. Residential Solar ABS 101. Crédit Agricole CIB (research note). Available at: https://www.ca-cib.com/sites/default/files/2022-03/Project-Bond-Focus-Solar-ABS-2022.pdf 

Convergence (2025) State of Blended Finance 2025. Convergence, Toronto. Available at: https://downloads.ctfassets.net/4cgqlwde6qy0/72p9ovKBeb8KVrBIbneKeL/3782139338b3a02b26f05756e0e9c8be/Convergence_State_of_Blended_Finance_2025.pdf 

Dai, A. (2025) Energy Storage Report (UC Berkeley Law / affiliated publication). Available at: https://www.law.berkeley.edu/wp-content/uploads/2025/09/Energy-Storage-Report-Final-EN-2.p df 

Garttan, G. et al. (2025) ‘Battery Energy Storage Systems: Energy Market Review…’ Energies (MDPI). Available at: https://www.mdpi.com/1996-1073/18/15/4174 

González, F.F. (2025) ‘Financing smart local energy systems: A conceptual…’ Sustainable Energy, Grids and Networks (ScienceDirect). Available at: https://www.sciencedirect.com/science/article/abs/pii/S2214629624005061 

IEA (2023) Electricity Grids and Secure Energy Transitions. International Energy Agency, Paris. Available at: https://www.iea.org/reports/electricity-grids-and-secure-energy-transitions 

IFC (2025) The Role of Blended Finance in an Evolving Global Context. International Finance Corporation, Washington, DC. Available at: https://www.ifc.org/content/dam/ifc/doc/2025/role-of-blended-finance-in-an-evolving-global-context.pdf  (Accessed: 20 February 2026).

OECD (2021) Evaluating Blended Finance Instruments and Mechanisms: Approaches and Methods (OECD Development Co-operation Working Papers No. 101). OECD Publishing, Paris. Available at: https://www.oecd.org/content/dam/oecd/en/publications/reports/2021/08/evaluating-blended-finance-instruments-and-mechanisms_c995f112/f1574c10-en.pdf (Accessed: 20 February 2026).

UNDP (2020)  Derisking Renewable Energy Investment (DREI). United Nations Development Programme. Available at: https://www.undp.org/publications/derisking-renewable-energy-investment (Accessed: 20 February 2026).

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