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Renewable Energy Finance Agreements UK: Key Terms

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Part ofEnergy

Updated June 2026 · England & Wales
Getting a renewable energy project off the ground in the UK takes more than planning permission and a good site. The financial architecture behind these schemes is often where deals succeed or fall apart. Whether you are developing a solar farm, an onshore wind site, a battery storage facility or a hydrogen project, the finance agreements you sign will shape cash flow, risk allocation and commercial control for decades. This page walks through the main legal building blocks you will come across, from the Contracts for Difference regime that underpins revenue certainty, to the special purpose vehicles that hold project assets, to the mix of senior debt and equity that typically funds construction. It is written for developers, investors, in-house teams and advisers who want a plain-English overview of how these deals fit together in practice.

What this document is

A finance agreement in a renewable energy context is the contract (or, more usually, a bundle of contracts) that governs how a project is funded and how the money flows between developers, lenders and investors. Unlike a standard corporate loan, these arrangements are engineered around the project itself.

Repayment is tied to the electricity or ancillary revenues the asset will generate once operational, rather than the wider balance sheet of the developer. The documents you might expect to see include a facility agreement between the project company and its lenders, security documents over the project's assets and contracts, intercreditor arrangements where more than one lender is involved, direct agreements with key counterparties, and a shareholders' agreement governing the equity side.

Sitting alongside these are the revenue support instruments, most notably a Contract for Difference, and the grid connection and offtake arrangements that make the numbers work. Read together, they determine who bears construction risk, who takes price risk, and who controls the project if things go wrong.

How to use this document

  1. Map the project structure early. Before you start negotiating finance terms, decide how the project will be held. Most UK renewables are developed through a special purpose vehicle (SPV), a standalone company that owns the asset and enters into all project contracts. This ringfences liabilities and makes the project financeable, because lenders can take security over a clean corporate entity without exposure to unrelated group activities. 2. Lock in the revenue route. Lenders need visibility on income before they commit. That usually means securing a Contract for Difference through a government allocation round, signing a corporate power purchase agreement with a creditworthy offtaker, or a combination of both. The revenue contract sets the tone for the whole financing, because the tenor and pricing of your debt will be calibrated against how certain and how long those cash flows look. 3. Agree the debt and equity split. Work through how much of the capital cost will be funded by bank or institutional debt and how much by sponsor equity. Highly contracted renewable projects can often support gearing in the region of 70 to 80 per cent debt, though this varies with technology, counterparty risk and market conditions. The split drives your weighted cost of capital and the returns available to shareholders. 4. Negotiate the facility and security package. The facility agreement will cover drawdown conditions, repayment profile, financial covenants, reserve accounts and events of default. Expect lenders to ask for a comprehensive security package: fixed and floating charges over the SPV, share security from the holding company, assignments of key project contracts, and direct agreements with the offtaker, EPC contractor and O&M provider. 5. Plan for operations and refinancing. Financial close is not the end of the story. Once the asset is built and performing, sponsors often refinance to release equity, extend tenor or reduce pricing. Your original documents should leave room for this, whether through prepayment mechanics, refinancing gain-share provisions, or flexibility in the security arrangements. Thinking about the exit at the outset saves friction later.

Common questions

If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £89.

Common questions

Q What is a Contract for Difference in simple terms?
A Contract for Difference, or CfD, is a long-term agreement between a renewable generator and a government-backed counterparty. It sets a guaranteed price per megawatt hour, known as the strike price. If the market price is lower, the generator receives a top-up; if it is higher, the generator pays the difference back. The mechanism gives developers revenue certainty, which in turn makes projects financeable at competitive rates.
Q Why are UK renewable projects usually held through an SPV?
A special purpose vehicle is a standalone company created solely to own and operate the project. Holding the asset this way keeps project risks and liabilities separate from the developer's wider business, which is essential for lenders taking security. It also makes the project easier to sell or refinance later, because a buyer can acquire the SPV rather than unpicking assets from a larger corporate group.
Q What is the typical debt to equity ratio on a UK renewable project?
It depends on the technology, the quality of the revenue contracts and the lending market at the time, but heavily contracted projects such as CfD-backed wind or solar can often support relatively high gearing. Battery storage and merchant projects tend to attract more conservative ratios because cash flows are less predictable. Sponsors should model several scenarios before committing to a structure.
Q What is a direct agreement and why do lenders want one?
A direct agreement is a tripartite contract between the project SPV, a key counterparty (such as the EPC contractor or offtaker) and the lenders. It gives lenders step-in rights, meaning they can take over the SPV's role under that contract if the SPV defaults on its loan. This preserves the value of critical project contracts in a distressed scenario and is a standard feature of project finance.
Q Do finance agreements change if the project uses a corporate PPA instead of a CfD?
Yes. Lenders will scrutinise the creditworthiness of the corporate offtaker, the tenor of the PPA, pricing structure (fixed, floating or hybrid) and termination rights. Because corporate PPAs can be shorter than a CfD, financing tenors may be reduced, or lenders may require a merchant tail assumption with conservative price curves. The security package will also include an assignment of the PPA.
Q What happens if the project is delayed during construction?
Delay is one of the biggest risks in any project financing. The EPC contract usually includes liquidated damages payable by the contractor, and the facility agreement will include a long-stop date after which lenders can accelerate. Sponsors may need to inject further equity, draw on contingency reserves, or renegotiate milestones. This is why construction risk allocation is heavily negotiated at the outset.
Q Can a smaller developer access project finance, or is it only for large players?
Smaller developers can access project finance, but the transaction costs, due diligence requirements and minimum ticket sizes mean it is often more efficient for sub-scale projects to use alternative routes such as portfolio financing, infrastructure funds, or sale to a larger operator at ready-to-build stage. Joint ventures with established sponsors are another common path for developers who have land and planning but lack balance sheet.
If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £89.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.