Banking Law and Green Infrastructure Finance in Spain

1. Introduction

Green infrastructure finance in Spain concerns the financing of infrastructure that contributes to environmental and climate objectives. It includes renewable-energy installations, electricity grids and storage, energy-efficient buildings, clean transport, electric-vehicle charging networks, water infrastructure, climate-adaptation projects and other assets that support Spain's transition toward a low-carbon economy.

From a banking-law perspective, there is no single Spanish statute called the “Green Infrastructure Finance Law.” Instead, these transactions sit at the intersection of ordinary banking and project-finance law, Spain's climate legislation, financial-supervision rules and an extensive body of directly applicable EU sustainable-finance legislation.

Spain's Law 7/2021 on Climate Change and Energy Transition (Ley 7/2021) is particularly important. Among other things, it seeks to redirect capital toward sustainable investment, requires climate-related financial-risk reporting and provides a framework supporting investment in renewable energy, energy efficiency and low-carbon infrastructure. The consolidated legislation was updated as recently as 30 June 2026.

2. Legal Framework

A. Law 7/2021 on Climate Change and Energy Transition

Law 7/2021 provides the central Spanish statutory framework connecting climate policy with investment and finance.

Its objectives include:

• achieving Spain's commitments under the Paris Agreement;
• decarbonising the Spanish economy;
• increasing renewable energy;
• improving energy efficiency;
• encouraging sustainable investment;
• developing electric-mobility infrastructure;
• addressing financial risks resulting from climate change; and
• directing public and private capital toward environmentally sustainable activities.

The legislation expressly recognises the need for a framework capable of facilitating sustainable investment and redirecting capital flows toward sustainable and inclusive growth.

This makes climate considerations relevant not merely to environmental regulation but also to banks' lending, investment, governance and risk-management functions.

B. EU Sustainable Finance Framework

Because Spain is an EU Member State, Spanish green infrastructure financing is strongly affected by EU legislation.

Important parts include the:

EU Taxonomy Regulation – establishes criteria for determining whether economic activities can qualify as environmentally sustainable.

Sustainable Finance Disclosure Regulation (SFDR) – imposes sustainability-related disclosure requirements on relevant financial-market participants and financial products.

Corporate Sustainability Reporting framework – requires covered businesses to provide extensive sustainability information that can subsequently influence banks' credit and investment decisions.

European Green Bond Regulation – creates the voluntary European Green Bond Standard (EuGB). It links the use of proceeds to EU Taxonomy requirements and establishes transparency and external-review requirements.

The European Green Bond Standard has been available to issuers since December 2024. From 21 June 2026, firms providing external reviews under the regime generally have to be registered with ESMA.

3. Role of Banks in Green Infrastructure Finance

Banks can participate in Spanish green infrastructure through several structures.

A bank can provide a conventional green loan, under which the borrower commits to using financing for eligible environmental projects.

It can also provide project finance, where repayment primarily depends on the project's future revenues. This is particularly relevant to solar parks, wind farms, electricity infrastructure and similar large assets.

Banks can additionally arrange or purchase:

• green bonds;
• European Green Bonds;
• sustainability-linked loans;
• syndicated green loans;
• infrastructure debt;
• public-private partnership financing; and
• refinancing facilities for existing sustainable assets.

Spain has significant experience with green lending. European Commission analysis indicates that Spanish companies have made substantial use of sustainable financing instruments, particularly green loans, and that the financial sector has been an important participant in Spanish sustainable-bond issuance.

4. EU Taxonomy and Infrastructure Lending

The EU Taxonomy is especially significant when a bank, borrower or bond issuer represents infrastructure as environmentally sustainable.

A project cannot simply be labelled "green" because it has some environmental benefit. Taxonomy analysis generally considers whether an economic activity:

1. contributes substantially to one or more recognised environmental objectives;
2. does not significantly harm the other relevant objectives;
3. complies with applicable minimum safeguards; and
4. satisfies relevant technical screening criteria.

Consequently, financing documentation increasingly needs reliable information about the project's technology, emissions, construction, environmental performance and compliance.

For banks, this creates a due-diligence issue as well as a disclosure issue.

5. Climate Risk and Spanish Banks

Law 7/2021 also treats climate change as a financial-risk issue.

Spanish legislation requires relevant entities to assess and disclose financial risks associated with climate change, including risks arising from the transition toward a sustainable economy.

Credit institutions have also been required to publish specific portfolio decarbonisation objectives aligned with the Paris Agreement. The Bank of Spain, CNMV and Directorate-General of Insurance and Pension Funds are given roles concerning assessment of climate-related risks to the Spanish financial system.

Therefore, when a Spanish bank evaluates a major infrastructure loan, environmental considerations can affect ordinary prudential questions such as:

credit risk — whether climate developments could affect repayment;

physical risk — whether heat, flooding, drought, fires or other climate effects threaten the infrastructure;

transition risk — whether regulatory or technological changes could make an asset less profitable;

legal risk — whether permits or environmental requirements are defective;

reputational risk — whether environmental claims are misleading; and

collateral risk — whether climate developments reduce the value of financed assets.

6. Prudential Regulation

Green status does not eliminate normal banking requirements.

Banks financing environmentally sustainable infrastructure must still comply with the prudential rules applicable to credit institutions, including requirements concerning:

• capital;
• liquidity;
• credit-risk assessment;
• concentration risk;
• governance;
• internal controls;
• large exposures;
• collateral valuation; and
• supervisory reporting.

Spanish climate legislation itself recognises financial prudence in regulated infrastructure. Law 7/2021 discusses appropriate indebtedness levels for regulated electricity and gas activities so that essential regulated activities retain sustainable debt structures.

Thus, "green" and "financially sound" remain separate questions.

7. At Least Six Important Case Laws

A qualification is important here: Spain has relatively little reported banking litigation specifically labelled “green infrastructure finance.” The strongest jurisprudence comes from renewable-energy investment disputes, environmental regulation, state aid and constitutional litigation. These cases nevertheless shape the legal risks that banks and investors must assess when financing Spanish green infrastructure.

Case 1 — Constitutional Court Judgment 90/2022

Court: Spanish Constitutional Court
Date: 30 June 2022

This case involved a constitutional challenge concerning provisions of Spain's Law 7/2021 on Climate Change and Energy Transition.

The challenge concerned, among other matters, Article 20 and the law's repealing provision. The Constitutional Court rejected the relevant challenge.

The case is important because it demonstrates that Spain's climate-transition framework operates within constitutional rules governing the distribution of regulatory authority and the protection of legally recognised interests.

For green infrastructure lenders, constitutional challenges can matter because infrastructure projects frequently depend on long-term regulatory assumptions.

The official consolidated legislative record identifies Constitutional Court Judgment 90/2022 in connection with Law 7/2021.

Case 2 — Charanne B.V. and Construction Investments S.A.R.L. v Spain

Forum: Arbitration under the Energy Charter Treaty
Award: 2016

This was one of the important disputes arising from changes to Spain's renewable-energy support framework.

Investors argued that Spain's modifications to the regulatory framework governing renewable energy violated protections available under the Energy Charter Treaty.

The tribunal did not accept the investors' claims.

Its broader significance lies in the relationship between legitimate regulatory change and investor expectations. The dispute illustrated that participation in a regulated renewable-energy sector does not necessarily guarantee that every element of the regulatory regime will remain unchanged.

Banking relevance: lenders should not assume that subsidies, tariffs or regulatory incentives supporting project revenues will remain permanently fixed.

Case 3 — Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v Kingdom of Spain

Forum: ICSID arbitration
Award: 2017; later annulment proceedings

The investors had invested in Spanish concentrated solar-power projects and challenged changes to Spain's renewable-energy remuneration system.

An arbitral tribunal initially found Spain liable and awarded substantial damages. The award was subsequently annulled in 2020 because of issues concerning the constitution of the tribunal and an arbitrator's conflict.

The dispute remains highly instructive for infrastructure financing.

A renewable project may have excellent engineering characteristics but still experience severe financial difficulties when its regulatory revenue model changes.

Banking lesson: regulatory-change risk should be incorporated into debt sizing, financial modelling, covenants and stress testing.

Case 4 — Novenergia II – Energy & Environment (SCA) v Kingdom of Spain

Forum: SCC arbitration
Award: 2018

Novenergia invested in Spanish photovoltaic projects.

It challenged Spain's changes to the renewable-energy remuneration regime and obtained an award against Spain.

The litigation surrounding enforcement of renewable-energy arbitration awards subsequently interacted with EU-law questions concerning intra-EU investment arbitration.

Banking relevance: cross-border financing of renewable infrastructure may involve several overlapping legal systems—Spanish law, EU law, financing-contract law and international investment law.

A bank financing such assets must therefore examine not only project economics but also enforceability and regulatory jurisdiction.

Case 5 — Antin Infrastructure Services Luxembourg S.à r.l. and Antin Energia Termosolar B.V. v Kingdom of Spain

Forum: ICSID
Award: 2018

The dispute concerned investments in Spanish solar-thermal infrastructure.

The investors challenged regulatory changes affecting renewable-energy remuneration. The tribunal found Spain liable under the Energy Charter Treaty and awarded compensation.

The case became part of the wider group of disputes concerning Spain's renewable-energy reforms.

For banking law, Antin demonstrates the importance of regulatory stability risk.

Where debt repayment is substantially dependent on regulated revenues, lenders normally need to evaluate:

• tariff-change risk;
• subsidy reduction;
• change-in-law provisions;
• debt-service coverage;
• termination compensation; and
• downside scenarios.

Case 6 — Cube Infrastructure Fund SICAV and Others v Kingdom of Spain

Forum: ICSID
Award: 2019

This dispute involved investments connected with Spanish renewable-energy infrastructure, including photovoltaic and hydroelectric assets.

The claimants challenged regulatory changes affecting the economic framework surrounding their investments.

The case is significant because it again demonstrates the interaction between infrastructure investment and changing public regulation.

From a lending perspective, it reinforces an important distinction:

project risk concerns whether the infrastructure performs commercially and technically;

while

regulatory risk concerns whether government rules change the economic assumptions on which financing was based.

Green infrastructure financing requires banks to assess both.

Case 7 — Infrastructure Services Luxembourg S.à r.l. and Energia Termosolar B.V. v Kingdom of Spain

This dispute forms another important part of the Spanish renewable-energy litigation landscape.

The underlying controversy again concerned changes to Spain's renewable-energy framework and the consequences for foreign investors.

Its relevance extends beyond investment arbitration because project lenders rely heavily upon predictable cash flows.

Where revenue depends upon a statutory tariff or regulatory payment mechanism, a material legal change can alter:

Revenue → EBITDA → Debt Service Coverage Ratio → Loan repayment capacity.

Thus, legal and regulatory due diligence becomes an integral component of banking credit analysis.

Case 8 — European Commission v Spain / EU Renewable-Energy and Environmental Litigation

Spanish green infrastructure must additionally comply with EU environmental and energy law.

EU jurisprudence concerning environmental assessment, renewable-energy regulation, protected areas, public procurement and State aid can affect whether infrastructure is legally capable of being constructed or financed.

For lenders, the important principle is that financing approval cannot cure an unlawful project authorisation.

A bank therefore normally requires evidence concerning matters such as environmental-impact assessment, construction permits, grid access, land rights and sector-specific licences before significant project-finance funds are released.

8. Project Finance Structure

A typical Spanish green-infrastructure financing may be structured as:

Sponsors → Project Company (SPV) → Green Infrastructure Asset

The SPV obtains financing from one or more banks.

The bank may take security over:

• shares in the SPV;
• project bank accounts;
• receivables;
• insurance proceeds;
• material project contracts;
• certain movable or immovable assets; and
• other rights permitted under Spanish law.

Major contractual arrangements can include:

EPC contract – engineering, procurement and construction.

O&M agreement – operation and maintenance.

PPA – power purchase agreement for renewable electricity.

Financing agreement – loan terms and repayment structure.

Security documents – protection of lenders following default.

Direct agreements – may give lenders specified rights concerning important project contracts.

9. Green Bonds and Infrastructure

Infrastructure can also be financed through green bonds rather than conventional bank loans.

An issuer raises capital from investors and commits to applying proceeds to eligible environmentally sustainable projects.

The European Green Bond Standard now provides a voluntary EU framework intended to increase transparency and address greenwashing. It is closely linked to the EU Taxonomy and requires regulated disclosure and external-review mechanisms.

This can be particularly relevant to:

• renewable electricity;
• electricity grids;
• clean transport;
• energy-efficient buildings;
• water infrastructure;
• climate adaptation; and
• other Taxonomy-eligible infrastructure.

10. Electric-Vehicle Infrastructure

Electric-vehicle charging is a particularly clear example of the connection between Spanish climate law and infrastructure investment.

Law 7/2021 introduced requirements concerning charging infrastructure at qualifying fuel stations. The legislation distinguishes requirements according to fuel-sales volumes and also addresses charging infrastructure connected with state-road concessions.

Banks may therefore finance:

regulatory obligation → charging infrastructure construction → capital expenditure → bank/project financing.

The regulatory requirement can create investment demand, but lenders must still determine whether individual projects generate adequate revenues and satisfy credit requirements.

11. Public Finance and Public-Private Cooperation

Green infrastructure frequently requires both private and public capital.

Financing can involve:

• commercial banks;
• institutional investors;
• public development institutions;
• EU programmes;
• public guarantees;
• project sponsors; and
• capital-market investors.

Spain has also used public incentives, recovery programmes and ICO-related financing mechanisms in its sustainable-finance framework.

This allows certain projects to use blended finance, combining public support with commercial capital.

12. Greenwashing Risk

A significant legal concern is the inaccurate description of infrastructure or financing as "green."

For example, problems can arise if:

• bond proceeds are not applied to stated projects;
• sustainability information is materially inaccurate;
• Taxonomy alignment is overstated;
• environmental targets are misleading;
• reporting is incomplete; or
• environmental benefits cannot be substantiated.

This explains the increasing importance of Taxonomy criteria, sustainability reporting, external verification and the European Green Bond framework.

EU policy expressly identifies tackling greenwashing as one of the purposes behind the European Green Bond Standard.

13. Due Diligence by Banks

Before financing major Spanish green infrastructure, lenders typically need to examine several legal and commercial areas:

1. Borrower/SPV – legal existence, authority and ownership.
2. Permits – environmental and construction approvals.
3. Land – ownership, lease, concession or other rights.
4. Environmental compliance – including environmental-impact requirements.
5. Grid connection – particularly for electricity projects.
6. Revenue contracts – including PPAs and concession arrangements.
7. EU Taxonomy – where Taxonomy alignment is claimed.
8. Security package – whether lender security can be validly created and enforced.
9. Regulatory-change risk – whether revenue depends heavily upon government regulation.
10. Climate risk – physical and transition risks affecting long-term repayment.

14. Significance of the Spanish Renewable-Energy Cases

The Spanish renewable-energy disputes provide one of the most important lessons for green infrastructure finance.

Many infrastructure assets have lives of 20–30 years or more, while legislation and regulatory policy can change substantially during that period.

Therefore:

Green infrastructure finance = credit risk + construction risk + operational risk + environmental risk + regulatory risk + climate risk.

Cases such as Charanne, Eiser, Novenergia, Antin and Cube Infrastructure demonstrate why lenders cannot base a long-term financing decision solely on the regulatory environment existing on the loan-signing date.

Conclusion

Banking law and green infrastructure finance in Spain operate through a combination of Spanish banking law, Law 7/2021 on Climate Change and Energy Transition, EU sustainable-finance legislation, prudential regulation, project-finance law, environmental law and capital-market rules.

Spain's framework increasingly connects climate objectives with the financial system. Banks are expected not merely to provide capital but also to assess climate-related financial risk, environmental compliance, regulatory exposure and the credibility of sustainability claims. Law 7/2021 expressly supports the redirection of capital toward sustainable investment and imposes climate-related obligations relevant to financial institutions.

The Spanish renewable-energy disputes—including Charanne, Eiser, Novenergia, Antin and Cube Infrastructure, together with Spanish constitutional litigation such as Constitutional Court Judgment 90/2022—show why regulatory stability is a central issue in financing long-lived green assets. Consequently, sound green infrastructure banking in Spain depends on both environmental sustainability and conventional financial discipline: robust due diligence, prudent leverage, reliable cash-flow analysis, enforceable security, regulatory-risk assessment and credible sustainability disclosures.