Banking Law and Green Hydrogen Investment in Spain

1. Introduction

Green hydrogen has become an important part of Spain’s energy-transition and industrial-investment framework. In simple terms, green or renewable hydrogen is hydrogen produced using renewable energy, normally through electrolysis, rather than through fossil-fuel-based production.

From a banking-law perspective, green hydrogen is important because projects normally require very large amounts of capital. Banks may participate through project loans, syndicated lending, bridge facilities, guarantees, infrastructure financing, green bonds and other sustainable-finance instruments.

There is not, however, one single Spanish statute called the “Green Hydrogen Investment Law.” The legal framework is spread across Spanish banking law, energy law, environmental law, company law, public-subsidy rules and EU sustainable-finance legislation.

The central Spanish climate framework is Law 7/2021 of 20 May on Climate Change and Energy Transition. It establishes Spain's decarbonisation framework and connects investment policy with renewable energy, energy efficiency and the transition toward a climate-neutral economy.

Green-hydrogen investments therefore sit at the intersection of:

banking regulation + energy regulation + environmental regulation + sustainable finance + public funding + project finance.

2. Main Legal Framework

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

Law 7/2021 provides the general legal foundation for Spain's transition toward a low-carbon economy.

Among other matters, it establishes national climate and renewable-energy objectives and promotes investment in renewable generation, energy efficiency, storage and other technologies required for the energy transition.

It is especially important to banks because financing decisions increasingly have to consider environmental risks, transition risks and the long-term economic viability of carbon-intensive activities.

The legislation also incorporates the idea of financial prudence in regulated energy activities. Excessive indebtedness in essential regulated activities can create risks to the stability of the energy system, so financing structures cannot be examined purely from the perspective of environmental benefits.

For a hydrogen project, therefore, the lender normally needs to consider both:

environmental sustainability; and

financial sustainability.

3. Renewable Hydrogen and Guarantees of Origin

An important Spanish instrument is Royal Decree 376/2022 of 17 May.

Among other things, it establishes Spain's system of guarantees of origin for renewable gases and implements parts of the EU renewable-energy framework.

This matters considerably to banks.

Suppose a bank provides €300 million for construction of an electrolyser and the financing documentation assumes that the resulting hydrogen can be marketed as renewable hydrogen.

The lender cannot simply depend upon the developer calling the hydrogen “green.”

The project must satisfy the applicable legal and technical requirements.

Therefore, lenders may make compliance with renewable certification and guarantees-of-origin requirements part of:

conditions precedent;

representations and warranties;

information undertakings;

continuing covenants; and

events of default.

The legal status of the hydrogen can directly affect the project's revenues and consequently its ability to repay its loans.

4. Project Finance

Large Spanish green-hydrogen projects can be structured through project finance.

A special-purpose company may be established to develop and operate the hydrogen facility.

Banks then assess whether the project's future cash flows are sufficient to service the debt.

A simplified structure can look like this:

Sponsors → Project Company → Hydrogen Plant

and:

Banks → Loans → Project Company

while:

Project Company → Hydrogen → Industrial Purchasers

Banks will normally examine several elements before financing.

These include construction risk, electricity supply, renewable-energy availability, technology risk, environmental permits, hydrogen purchase agreements, government support and projected hydrogen prices.

The lender is therefore financing not merely a piece of machinery but an entire network of contracts and regulatory permissions.

5. Bankability of Green Hydrogen

The concept of bankability is especially important.

A technically impressive hydrogen project may still be difficult to finance if it does not have predictable revenues.

For example, imagine that a company proposes a €500 million renewable-hydrogen plant.

The bank may require a long-term hydrogen offtake agreement with an industrial purchaser.

If the purchaser promises to acquire a defined amount of hydrogen for ten years, the lender obtains greater certainty concerning the project's future income.

The bank may therefore examine:

creditworthiness of the hydrogen purchaser;

duration of the offtake agreement;

minimum-purchase commitments;

pricing mechanisms;

termination rights;

regulatory-change provisions;

renewable-certification obligations; and

remedies following contractual default.

These matters can determine whether the project is financeable.

6. Renewable Electricity Supply

Renewable hydrogen production requires substantial amounts of electricity.

Consequently, the electricity arrangements behind a project are often just as important as the electrolyser itself.

Developers may rely on renewable generation facilities or long-term power purchase agreements.

Banks consequently investigate whether sufficient renewable electricity will be available throughout the financing period.

Spanish renewable-energy legislation is particularly relevant here.

Royal Decree 960/2020 established an economic regime for renewable-energy generation, while later measures adjusted aspects of that framework. Royal Decree 376/2022 also modified certain provisions concerning the renewable-energy economic regime.

7. Environmental Permits

Hydrogen investment does not avoid ordinary environmental law simply because the final project contributes to decarbonisation.

Depending upon the characteristics of the project, developers can face requirements concerning:

environmental impact assessment;

water;

industrial installations;

electricity connections;

pipelines;

land use;

protected areas;

construction;

storage facilities; and

safety.

For banks, permits can become important conditions precedent to financing.

A lender might agree to provide €200 million but prohibit the borrower from drawing the construction facility until specified environmental and administrative authorisations have been obtained.

This reduces the possibility that money will be committed to a project that cannot legally operate.

8. EU Sustainable-Finance Rules

Spanish banks also operate within the broader EU sustainable-finance framework.

This can affect whether financing or financial products connected with hydrogen projects may legitimately be presented as environmentally sustainable.

Banks and investment firms therefore need reliable information concerning matters such as:

the source of electricity;

lifecycle greenhouse-gas emissions;

technical characteristics;

environmental impact;

sustainability criteria; and

use of financing proceeds.

This is particularly important in preventing greenwashing.

Calling a loan “green” does not by itself make the underlying investment environmentally sustainable.

9. Prudential Banking Regulation

Environmental benefits do not remove ordinary banking requirements.

Spanish banks remain subject to prudential requirements concerning:

credit risk;

concentration risk;

capital;

liquidity;

governance;

large exposures;

internal controls;

risk management; and

supervisory review.

Spanish banking legislation implementing EU prudential and resolution rules demonstrates the broader principle that banks must maintain adequate capital and appropriate loss-absorbing capacity irrespective of the policy attractiveness of particular investments.

Consequently, a bank cannot justify excessive exposure to a hydrogen developer merely because hydrogen contributes to environmental objectives.

10. Security Package

Banks financing a Spanish hydrogen project may seek security over relevant project assets and contractual rights where legally permissible.

The financing structure could include security relating to:

shares in the project company;

project bank accounts;

receivables;

insurance proceeds;

equipment;

contractual rights; and

certain project assets.

The objective is to protect lenders if the borrower fails to repay.

However, the creation and enforcement of security remains subject to Spanish property, corporate, insolvency and procedural law.

11. Public Subsidies and State Support

Hydrogen projects can also involve public support.

This creates an important interaction between private bank financing and public funding.

For example:

Total project cost: €400 million

Public support: €80 million

Sponsor equity: €120 million

Bank financing: €200 million

The bank must determine whether the public assistance is legally secure and whether the borrower has satisfied all conditions attached to it.

If a subsidy must be repaid because the developer failed to satisfy its conditions, the project's financial model could change significantly.

Important Case Law

There is still limited Spanish reported case law dealing specifically with bank loans financing green-hydrogen plants. It would therefore be misleading to invent six supposedly direct “green hydrogen banking cases.”

The following cases are instead closely relevant authorities on renewable investment, environmental authorisation, subsidies, taxation and Spain's energy-transition framework. Their principles can affect the legal and bankability analysis of hydrogen investments.

Case 1 — Constitutional Court Judgment 90/2022, 30 June 2022

Court: Spanish Constitutional Court
Reference: STC 90/2022
Subject: Law 7/2021 on Climate Change and Energy Transition.

The Xunta de Galicia challenged Article 20 and the repealing provision of Law 7/2021.

The Constitutional Court dismissed the constitutional challenge.

Importance for hydrogen investment

This judgment is relevant because Law 7/2021 forms part of the legislative foundation of Spain's energy-transition policy.

For investors and lenders, constitutional challenges to major climate legislation can create regulatory uncertainty.

The judgment illustrates that energy-transition projects operate within constitutional principles such as:

legal certainty;

protection of public assets;

legislative competence; and

environmental regulation.

A lender financing long-lived hydrogen infrastructure must therefore include regulatory risk in its due-diligence process.

Case 2 — Supreme Court, Corme G-3 Wind Farm Case

Court: Spanish Supreme Court
Decision: December 2023
Subject: Administrative authorisation for renewable-energy infrastructure.

The dispute concerned the authorisation of the Corme G-3 wind farm in Galicia.

The Supreme Court reversed the judgment that had annulled the project's authorisation and upheld the relevant administrative authorisation.

Importance for hydrogen financing

Although this was a wind-energy case rather than a hydrogen-financing dispute, it is highly relevant to hydrogen projects powered by renewable electricity.

It demonstrates how administrative-authorisation disputes can affect renewable infrastructure.

For banks, this creates a fundamental project-finance question:

Are the project's permits legally robust?

Consequently, lenders frequently require confirmation of important authorisations before permitting major loan drawdowns.

Case 3 — Supreme Court Judgment, 22 September 2022

Reference: ROJ STS 3618/2022
Court: Supreme Court, Administrative Chamber
Proceedings: Appeal 1567/2021.

The case concerned renewable-energy infrastructure and environmental assessment.

The Supreme Court recognised the relevance of environmental assessment when the competent administration determines whether the corresponding planning instrument should be approved.

Importance

The decision demonstrates an essential rule for green-hydrogen investors:

“Green” infrastructure is not automatically exempt from environmental scrutiny.

A project contributing to decarbonisation can still be restricted or rejected because of its location or environmental effects.

Banks therefore need environmental due diligence before committing substantial funds.

Case 4 — Supreme Court Renewable-Energy Remuneration Litigation

The Spanish Supreme Court has dealt extensively with challenges to changes in the remuneration framework for renewable-energy installations, including litigation concerning Royal Decree 413/2014 and Order IET/1045/2014.

The Court's renewable-energy jurisprudence recognised that EU renewable-energy rules did not require Spain to preserve a particular tariff or premium system permanently. The State retained significant freedom concerning the design of renewable-support mechanisms, subject to applicable legal limits.

Importance for hydrogen investment

This principle is extremely important for hydrogen financing.

A lender should not automatically assume that:

today's subsidy = tomorrow's guaranteed subsidy.

Government support mechanisms can evolve.

Loan models should therefore consider:

subsidy modification;

regulatory change;

revenue sensitivity;

refinancing risk; and

alternative revenue sources.

Case 5 — Supreme Court Judgment STS 584/2023

Reference: ECLI:ES:TS:2023:584
Date: 20 February 2023
Proceedings: Appeal 5666/2021.

The case concerned the Spanish tax on the value of electricity production and the interpretation of electricity production for tax purposes.

Importance for hydrogen projects

Hydrogen production can depend heavily upon electricity economics.

Therefore:

electricity taxation → electricity cost → hydrogen production cost → project cash flow → debt-service capacity.

Even litigation that does not directly concern hydrogen may therefore materially affect financial models for renewable-hydrogen investments.

Banks must conduct tax due diligence alongside ordinary credit analysis.

Case 6 — Supreme Court Subsidy Cases involving Tecnalia and Mondragón Unibertsitatea

The Spanish Supreme Court confirmed the State's obligation to pay more than €5 million in budgeted research subsidies to two organisations.

One of the projects involved smart electricity networks and renewable-energy integration.

The relevant amounts included approximately €3.249 million for Fundación Tecnalia Research & Innovation and €2 million for Mondragón Unibertsitatea.

Importance for green-hydrogen investment

The case illustrates the legal importance of public financial commitments.

Hydrogen projects frequently combine:

equity + bank debt + public grants + EU or national support.

Where project economics depend upon public funding, banks need to determine:

whether the grant has been legally awarded;

whether conditions remain outstanding;

when payment becomes enforceable;

whether funding can be revoked;

whether repayment obligations exist; and

what happens if public funding is delayed.

Case 7 — Constitutional Court Judgment 25/2024

Court: Spanish Constitutional Court
Reference: STC 25/2024
Date: 13 February 2024.

This case concerned Andalusian territorial-sustainability legislation and addressed constitutional questions involving environmental protection, legal certainty, local autonomy and land-use regulation. The Constitutional Court declared certain provisions invalid while interpreting others consistently with constitutional requirements.

Importance for hydrogen investment

Large hydrogen projects require land and related infrastructure.

Consequently, hydrogen investment can involve interactions between:

national energy law + autonomous-community law + municipal planning + environmental law.

A project may therefore satisfy national energy objectives but still face difficulties under territorial or environmental rules.

12. Regulatory Risk

Green-hydrogen plants can operate for decades.

During that period, rules concerning renewable electricity, hydrogen certification, emissions, taxation, subsidies or network access may change.

Banks therefore commonly address regulatory change through contractual provisions.

A financing agreement may require the borrower to notify lenders when:

a material permit is suspended;

environmental approval is challenged;

a subsidy is withdrawn;

renewable certification is lost; or

legislation materially affects project revenues.

Serious regulatory problems can trigger restrictions on further borrowing or, depending on the agreed financing terms, an event of default.

13. Greenwashing Risk

Green hydrogen financing also creates disclosure risk.

Consider a loan marketed as financing “100% renewable hydrogen.”

If substantial electricity used for production does not satisfy the applicable renewable criteria, statements made to investors, lenders or financial markets could become misleading.

Banks therefore need evidence supporting sustainability claims.

This is one reason why the Spanish guarantee-of-origin framework for renewable gases is important. Royal Decree 376/2022 specifically regulates a guarantees-of-origin system for renewable gases.

14. Foreign Investment

International investors can participate in Spanish hydrogen projects through:

project companies;

joint ventures;

infrastructure funds;

bank lending;

bond financing; and

equity investment.

However, foreign investment in strategically important sectors can also interact with Spain's foreign-investment screening framework.

Energy is treated as a particularly significant strategic field in that framework. Spanish official materials concerning foreign-investment controls specifically identify energy and other fundamental inputs among strategically relevant sectors.

Therefore, acquisition financing for a hydrogen company may require both ordinary banking due diligence and analysis of foreign-investment rules.

15. Insolvency and Bank Protection

A green project can fail economically despite having environmental value.

Possible causes include:

construction overruns;

electricity-price increases;

technology problems;

insufficient hydrogen demand;

loss of subsidies;

regulatory changes;

permit disputes; or

insolvency of an important purchaser.

Banks therefore structure loans around downside scenarios as well as expected environmental benefits.

Spanish and EU-derived banking-resolution legislation also establishes rules concerning loss absorption, eligible liabilities and recapitalisation where regulated financial institutions themselves experience serious financial distress.

16. Typical Banking Due-Diligence Checklist

Before financing a Spanish green-hydrogen project, a bank would generally investigate:

Corporate: ownership, shareholders, project company and corporate authority.

Banking: borrower creditworthiness, leverage, repayment capacity and security.

Energy: electricity source, connection arrangements and renewable-energy contracts.

Hydrogen: production technology, renewable classification and guarantees of origin.

Environmental: environmental assessment, emissions, water and protected-area issues.

Planning: land rights, construction permission and territorial planning.

Commercial: hydrogen offtake agreements and customer creditworthiness.

Public funding: grants, subsidies and State-aid conditions.

Tax: electricity, corporate and project-specific tax exposure.

Sustainability: environmental classification and accuracy of green claims.

Insolvency: enforceability of security and lender rights following default.

17. Example

Assume Iberia Green Hydrogen Project S.L. proposes a €600 million renewable-hydrogen plant.

Its financing is:

Sponsor equity — €150 million

Public support — €100 million

Bank syndicate — €350 million

Before providing the €350 million facility, the banks would investigate whether the project has valid environmental and construction permissions, sufficient renewable electricity, legally compliant hydrogen certification, reliable long-term purchasers and enforceable project contracts.

They would also examine whether the public grant could be withdrawn and whether project revenues remain sufficient if electricity prices rise.

The lenders could require:

Debt Service Coverage Ratio ≥ agreed level

and prohibit dividends if the project fails financial tests.

They could also obtain security over project-company shares, accounts and receivables, subject to Spanish law.

This demonstrates the fundamental relationship:

Green-hydrogen regulation determines project legality → project legality affects revenues → revenues determine bankability → bankability determines access to debt finance.

18. Overall Legal Position

Banking law and green-hydrogen investment in Spain should therefore be understood as an integrated legal framework rather than a separate branch of banking law.

The framework combines:

Spanish banking regulation

Law 7/2021 on Climate Change and Energy Transition

renewable-energy legislation

Royal Decree 376/2022 and renewable-gas guarantees of origin

environmental and planning law

EU sustainable-finance rules

public-subsidy and State-aid rules

project-finance and security law.

The case law also demonstrates an important distinction. Most existing Spanish decisions concern the surrounding legal infrastructure—renewable remuneration, permits, environmental assessment, taxation, subsidies and constitutional climate legislation—rather than disputes specifically between banks and borrowers over green-hydrogen loans.

For that reason, the most legally accurate approach is to apply those established principles to hydrogen financing rather than describe unrelated judgments as direct “green hydrogen banking” precedents.

Conclusion

Spain's green-hydrogen investment framework creates significant opportunities for banks to finance the transition toward renewable energy, but environmental objectives do not replace ordinary banking discipline.

A bank financing hydrogen infrastructure must simultaneously consider credit risk, regulatory risk, environmental compliance, renewable certification, electricity supply, public funding, contractual revenues, security and insolvency risk.

The seven authorities discussed above show how Spanish courts approach several of the issues surrounding such investments: constitutional climate legislation, renewable-project authorisation, environmental assessment, renewable remuneration, energy taxation, public subsidies and sustainable territorial development.

Consequently, the legal success of green-hydrogen investment in Spain depends on combining credible environmental characteristics with a financially sustainable and legally enforceable project structure.