Energy Project Finance:
Raising Capital for Power & Renewables

Energy project finance is one of the most established disciplines in infrastructure capital markets — and one of the most transformed by recent policy change. The Inflation Reduction Act reshaped the economics of US clean energy investment in ways that are still being absorbed by the market. Meanwhile, demand for power — driven by data centers, electrification, and re-industrialization — has created project development opportunities that didn't exist three years ago.

This guide covers how energy project developers raise capital in 2026: the capital stack, the investor types, the diligence process, and what makes the difference between projects that close and projects that don't.

The Energy Capital Stack in 2026

A clean energy project in 2026 typically combines three or four capital sources:

• Senior project debt: 50–70% of project cost, non-recourse against project revenues and assets. Infrastructure banks, insurance companies, and private credit funds are the primary senior lenders. PPA (Power Purchase Agreement) quality and tenor are the key underwriting inputs.
• Tax equity: US-specific structure where investors — typically banks and insurance companies — fund a portion of project costs in exchange for tax benefits (ITC or PTC). The IRA significantly expanded eligibility and amounts. Tax equity typically provides 30–40% of project cost for solar and wind projects.
• Equity / sponsor equity: Developer equity — the residual after debt and tax equity — is the most expensive capital in the stack and the hardest to source for independent developers. Infrastructure funds, family offices, and co-investors fill this role.
• Bridge and development capital: Pre-NTP capital to fund development through permitting, interconnection, and offtake — often the hardest piece to raise, as risk is highest.

Who Is Deploying Into Energy in 2026

Infrastructure funds have become the dominant equity investor in operating and near-operating renewable projects. The largest funds — Brookfield, Blackstone Infrastructure, GIP, KKR — do utility-scale deals exclusively. But a large ecosystem of mid-market infrastructure funds, energy-focused family offices, and development-stage investors now fills the market below $500M.

Tax equity is tighter than it looks. Despite the IRA expanding the market, the number of active tax equity investors is still limited — perhaps 20–30 institutions doing the bulk of the volume. Many developers discover this only after spending months on project development assuming tax equity will be available. Early engagement with tax equity investors, or with advisors who have tax equity relationships, is essential.

What Makes an Energy Project Financeable

Beyond the basics — site control, permits, interconnection queue position — the projects that close have three things in common: an executed or near-executed PPA or revenue contract with a creditworthy counterparty, a fully contracted EPC with a qualified constructor, and a development team with a track record of delivery.

Projects without offtake are increasingly difficult to finance. Merchant power — selling into the spot market — requires investors to underwrite power price volatility that most project finance lenders won't accept. The exception is peaking capacity in markets with tight capacity reserve margins, where merchant upside can be clearly modeled.

OAKRG works with energy developers across all technologies — solar, wind, storage, oil and gas, and power infrastructure — to structure financing and make introductions to project lenders, tax equity investors, and infrastructure equity. Contact us to discuss your project.