1. Introduction

Green financing refers to financial mechanisms through which capital is mobilised for projects that generate measurable environmental or climate benefits. In the energy sector, it is particularly important because renewable-energy generation, transmission modernization, energy storage, energy efficiency, green hydrogen and other low-carbon infrastructure require substantial upfront investment.

Green financing therefore connects energy law, financial regulation, environmental law and infrastructure law. The financing structure must not only make the project economically viable but also ensure that the funds are used for eligible environmental purposes, that investors receive reliable disclosures, and that the project complies with electricity and environmental regulations.

In India, important mechanisms include green bonds, green loans, concessional finance, blended finance, guarantees, viability-gap funding, infrastructure investment trusts, renewable-energy lending by specialised financial institutions and international climate finance. SEBI has progressively developed a regulatory framework for green debt securities, including disclosure requirements and independent third-party review. (Securities and Exchange Board of India)

2. Meaning and Objectives of Green Financing

Green financing can broadly be understood as financing directed towards projects producing environmental benefits, such as:

solar and wind power;

small and large renewable-energy projects;

energy-efficient buildings;

electricity-storage systems;

transmission infrastructure supporting renewable integration;

electric mobility;

green hydrogen;

waste-to-energy projects;

smart-grid infrastructure;

energy-efficiency projects; and

climate-resilient energy infrastructure.

Its principal objectives are:

Mobilising private capital for energy transition;

Reducing financing costs for eligible projects;

Increasing availability of long-term capital;

Sharing project risks between governments, lenders and private investors;

Creating environmental accountability through disclosure and verification; and

Preventing greenwashing, where a project is represented as environmentally beneficial without sufficient evidence.

SEBI's framework specifically recognises the importance of preventing greenwashing and has prescribed disclosure-related safeguards for green debt securities. (Securities and Exchange Board of India)

3. Major Green Financing Mechanisms

A. Green Bonds

A green bond is a debt instrument in which the proceeds are earmarked for eligible environmentally beneficial projects.

For energy projects, proceeds may finance:

solar parks;

wind farms;

renewable-energy transmission;

battery-storage systems;

energy-efficiency projects;

clean-energy transport; and

other qualifying green infrastructure.

Legal structure

The issuer raises money from investors and undertakes to repay principal and interest according to the bond terms. The distinguishing feature is generally the environmental use of proceeds, together with additional disclosure and monitoring requirements.

India introduced its green-bond disclosure framework through SEBI in 2017. SEBI subsequently revised the disclosure requirements in 2023. (Securities and Exchange Board of India)

SEBI's framework requires disclosure concerning matters such as the use of proceeds and continuing reporting. Independent third-party review/certification has also become an important component of the regulatory framework. (Securities and Exchange Board of India)

SEBI's published data demonstrates that green bonds have already been used by Indian infrastructure and renewable-energy-related issuers, including the Indian Renewable Energy Development Agency (IREDA). (Securities and Exchange Board of India)

Importance for energy projects

Green bonds can transform a renewable-energy project from a purely project-finance transaction into a capital-markets transaction. This potentially gives developers access to a broader investor base, including institutional investors with environmental mandates.

4. Green Loans

A green loan is debt financing in which the proceeds are used for qualifying green projects.

For example, a bank may provide a long-term loan to a solar-generation company for construction of a photovoltaic plant.

The financing agreement may contain:

eligible-project requirements;

environmental covenants;

reporting obligations;

restrictions on use of proceeds;

environmental-performance requirements; and

consequences for non-compliance.

Green loans are particularly useful where the project developer does not want to access public bond markets.

Legal significance

The financing agreement must be integrated with the project's:

PPA;

land arrangements;

environmental approvals;

grid-connection arrangements;

construction contracts;

insurance arrangements; and

regulatory permissions.

Thus, green financing does not operate independently from energy law.

5. Concessional and Development Finance

Concessional finance provides capital on terms that are more favourable than ordinary commercial financing.

It can take the form of:

lower interest rates;

longer repayment periods;

grace periods;

subordinated debt;

concessional credit lines; or

technical-assistance financing.

Development-finance institutions can therefore help make projects bankable where ordinary commercial financing would otherwise be too expensive.

In India's renewable-energy sector, institutions such as IREDA and REC have played important financing roles. A recent SEBI-hosted industry document notes substantial lending by REC and IREDA to renewable-energy projects. (Securities and Exchange Board of India)

6. Government Guarantees

Government guarantees are another important mechanism.

A renewable-energy project may face risks relating to:

payment default by an electricity purchaser;

political or regulatory changes;

infrastructure availability;

currency risks;

sovereign or sub-sovereign obligations.

A government guarantee can reduce perceived credit risk and consequently improve the project's ability to obtain financing.

Legal importance

A guarantee must have a clear statutory and contractual foundation. Issues may arise concerning:

authority to issue the guarantee;

enforceability;

guarantee limits;

public expenditure;

contingent liabilities; and

conditions attached to the guarantee.

For large electricity infrastructure, government guarantees can therefore function as a credit-enhancement mechanism rather than direct project financing.

7. Viability Gap Funding

Some green-energy projects are socially or environmentally desirable but commercially difficult to finance.

Viability-gap funding (VGF) addresses part of the financing gap through public financial support.

For example, an emerging clean-energy technology may have:

high capital expenditure;

uncertain revenue;

immature technology;

insufficient economies of scale.

Public support can make the project financially viable without requiring the government to own the entire project.

The legal structure normally requires:

eligibility criteria;

project-selection procedures;

funding agreements;

performance conditions;

monitoring; and

recovery provisions where contractual conditions are violated.

8. Blended Finance

Blended finance combines different sources of capital, such as:

Public capital + development finance + private debt + private equity.

For example:

Government support → concessional lender → commercial bank → private equity → renewable-energy project

Public or concessional capital absorbs some initial risk, allowing private investors to participate.

This is particularly relevant for:

offshore wind;

green hydrogen;

battery storage;

emerging technologies;

rural renewable energy; and

climate-resilient transmission.

The legal challenge is allocating risk transparently so that public funds do not improperly subsidise private investors without adequate public benefit.

9. Green Infrastructure Investment Trusts and Similar Structures

Infrastructure Investment Trusts (InvITs) can aggregate infrastructure assets and provide investors with exposure to infrastructure-related cash flows.

Where qualifying renewable or electricity-transmission assets are placed within such structures, capital can potentially be recycled into new infrastructure.

The basic structure may be:

Operational renewable asset → InvIT → investors → capital → new infrastructure

This can be particularly useful because mature renewable projects with predictable cash flows may attract long-term institutional investors.

10. Carbon and Sustainability-Linked Financing

Another mechanism is financing linked to environmental performance.

Unlike a conventional use-of-proceeds green bond, a sustainability-linked instrument may connect financing terms to measurable performance indicators.

For example, the interest rate could be linked contractually to:

emissions reduction;

renewable-energy capacity;

energy-efficiency targets; or

other measurable environmental indicators.

SEBI expanded India's sustainable-finance framework beyond green debt securities to include social bonds, sustainability bonds and sustainability-linked bonds. (Securities and Exchange Board of India)

This creates a distinction between:

Use-of-proceeds financing

Money must be spent on specified eligible projects.

Performance-linked financing

The financing terms are connected to specified sustainability outcomes.

11. Renewable-Energy Power Purchase Agreements and Bankability

A financing mechanism cannot be considered separately from the project's revenue structure.

For a renewable-energy project, a long-term Power Purchase Agreement (PPA) is often central to financial viability.

Lenders examine:

PPA duration;

tariff;

payment security;

termination provisions;

change-in-law provisions;

curtailment provisions;

force majeure;

grid connectivity; and

dispute-resolution mechanisms.

A stable PPA provides greater certainty concerning future cash flows and therefore supports debt financing.

12. Case Law: Energy Watchdog v. CERC

Energy Watchdog v. Central Electricity Regulatory Commission, (2017) 14 SCC 80

The Supreme Court considered disputes concerning long-term PPAs and changes affecting the economics of electricity generation.

The case is important for green financing because renewable-energy projects depend heavily on predictable contractual revenue.

The Court's analysis concerning force majeure, contractual allocation of risk and change in circumstances demonstrates why the legal certainty of PPAs is crucial to project finance. (Indian Kanoon)

Relevance to green finance

A lender providing financing to a solar or wind project must determine whether unforeseen events can legally alter the project's revenue expectations.

Therefore:

PPA certainty → predictable cash flow → improved bankability → easier green financing.

13. Case Law: Gujarat Urja Vikas Nigam Ltd. v. Tarini Infrastructure Ltd.

Gujarat Urja Vikas Nigam Ltd. v. Tarini Infrastructure Ltd., (2016) 8 SCC 743

This case concerned two small hydro projects and the question whether a tariff incorporated into a PPA could be reviewed by the State Electricity Regulatory Commission.

The Supreme Court considered the statutory regulatory powers of the Commission under the Electricity Act, 2003. (Indian Kanoon)

The case demonstrates an important principle for energy financing:

Electricity tariffs are not merely private commercial terms; they operate within a statutory regulatory framework.

Financing relevance

Financial institutions evaluating a renewable project must therefore consider:

the statutory powers of electricity regulators;

tariff regulation;

PPA terms;

regulatory changes; and

the possibility of regulatory intervention.

This directly affects the project's expected cash flows and consequently its debt capacity.

14. Case Law: All India Power Engineers Federation v. Sasan Power Ltd.

All India Power Engineers Federation v. Sasan Power Ltd.

The Supreme Court considered issues arising from competitive electricity procurement under the Electricity Act, 2003, including the statutory framework for tariff-based competitive bidding. (Indian Kanoon)

Although the dispute was not a green-bond case, its importance for green financing lies in the relationship between:

competitive procurement + regulatory oversight + electricity pricing + project investment.

For renewable-energy projects procured through competitive bidding, the legal validity and enforceability of the procurement framework are fundamental to investor confidence.

15. Case Law: Hanuman Laxman Aroskar v. Union of India

Hanuman Laxman Aroskar v. Union of India, (2019)

The Supreme Court examined environmental-clearance procedures and emphasised the importance of an environmentally informed decision-making process and the environmental rule of law. (Indian Kanoon)

Relevance to green financing

Green financing depends not merely on the label attached to a project but on whether the underlying project satisfies applicable environmental requirements.

A renewable-energy project may still require:

environmental assessment;

forest permissions;

wildlife-related approvals;

land permissions; and

other statutory clearances.

Consequently, environmental due diligence is a fundamental part of green project finance.

16. Greenwashing and Legal Accountability

One of the most important legal risks in green financing is greenwashing.

Greenwashing occurs when a financial product or project is presented as environmentally beneficial without adequate factual or regulatory support.

Potential problems include:

misleading investors;

inaccurate environmental claims;

improper allocation of bond proceeds;

inadequate impact reporting;

false sustainability representations; and

failure to comply with disclosure requirements.

SEBI has specifically issued regulatory guidance concerning dos and don'ts for green debt securities to address greenwashing concerns. (Securities and Exchange Board of India)

SEBI's 2026 framework also revised requirements relating to independent third-party reviewers/certifiers for green debt securities. (Securities and Exchange Board of India)

Thus, verification and disclosure are central components of the legal architecture of green finance.

17. Role of Independent Verification

Independent verification increases investor confidence by providing an external assessment of whether a financing instrument satisfies applicable green criteria.

Verification may concern:

eligibility of projects;

allocation of proceeds;

environmental objectives;

reporting systems;

impact measurement; and

continuing compliance.

This is particularly important because investors may not possess the technical expertise necessary to determine whether a solar, storage, hydrogen or energy-efficiency project actually meets environmental criteria.

18. Green Finance and Electricity Infrastructure

Green financing should not be restricted to electricity generation.

Modern electricity systems require enormous investment in:

transmission;

distribution;

smart grids;

battery storage;

pumped hydro storage;

digital grid infrastructure;

renewable-energy forecasting;

electric-vehicle charging networks; and

grid-balancing infrastructure.

SEBI's green-finance framework allows environmental financing to extend to categories such as renewable energy and energy efficiency, making the concept relevant to wider infrastructure rather than generation alone. (Securities and Exchange Board of India)

19. Key Legal Risks

Green-financed energy projects face several legal risks.

1. Regulatory risk

Changes in electricity tariffs, renewable-energy rules or environmental regulation can affect project economics.

2. Contractual risk

PPA disputes can affect revenue and debt servicing.

3. Environmental risk

Failure to obtain required environmental permissions can delay or stop projects.

4. Greenwashing risk

Misrepresentation of environmental benefits can expose issuers to regulatory and investor consequences.

5. Construction risk

Cost overruns and delays may undermine financial projections.

6. Technology risk

New technologies such as green hydrogen and long-duration storage may have uncertain performance.

7. Off-taker risk

Failure of the electricity purchaser to make payments can threaten project cash flows.

8. Currency risk

Projects financed through foreign capital may face exchange-rate exposure.

9. Refinancing risk

Projects dependent on short-term financing may face difficulties when debt matures.

20. Integrated Legal Structure of Green Project Finance

A typical green energy project can be represented as:

Government / Development Institution
↓
Guarantee / Concessional Finance / VGF
↓
Project Company (SPV)
↓
Equity + Green Loan + Green Bond
↓
Renewable-Energy Project
↓
PPA / Electricity Market Revenue
↓
Debt Servicing + Investor Returns

At the same time:

Environmental law + Electricity regulation + Securities regulation + Contract law + Company law

operate throughout the project lifecycle.

21. Indian Regulatory Framework

The Indian framework has evolved considerably.

Important components include:

Electricity Act, 2003

Provides the basic statutory framework for generation, transmission, distribution, electricity procurement and regulatory institutions.

SEBI framework

Regulates listed green debt securities and their disclosure requirements. SEBI's 2023 circular revised the requirements for issuance and listing of green debt securities. (Securities and Exchange Board of India)

Environmental regulation

Projects must comply with applicable environmental-clearance and environmental-protection requirements.

Financial institutions

Institutions such as IREDA and REC provide financing for renewable-energy development. (Securities and Exchange Board of India)

ESG debt framework

India has also expanded sustainable finance beyond conventional green bonds to social, sustainability and sustainability-linked instruments. (Securities and Exchange Board of India)

22. Advantages of Green Financing

Green financing can provide:

access to wider pools of capital;

potentially longer-term financing;

better alignment with institutional-investor mandates;

increased transparency;

mobilisation of private capital;

support for renewable-energy expansion;

risk-sharing between public and private sectors; and

improved visibility of environmental outcomes.

However, these benefits depend on sound project economics and credible legal and regulatory structures.

23. Challenges

The principal challenges include:

Higher transaction and verification costs;

Limited availability of bankable green projects;

Greenwashing risks;

Weak secondary-market liquidity for some green instruments;

Regulatory uncertainty;

Off-taker and payment risks;

Technology uncertainty;

Difficulty measuring environmental impact; and

Insufficient long-term domestic capital.

SEBI has itself identified issues concerning market scale, investor breadth, liquidity and project readiness in discussions of India's green-finance and infrastructure-financing ecosystem. (Securities and Exchange Board of India)

24. Conclusion

Green financing mechanisms provide the financial architecture necessary for the energy transition. Green bonds, green loans, concessional finance, government guarantees, viability-gap funding, blended finance, infrastructure investment structures and sustainability-linked instruments can collectively reduce financing barriers for renewable and clean-energy projects.

The legal dimension is equally important. Cases such as Energy Watchdog v. CERC, Gujarat Urja Vikas Nigam Ltd. v. Tarini Infrastructure Ltd., All India Power Engineers Federation v. Sasan Power Ltd., and Hanuman Laxman Aroskar v. Union of India demonstrate that the success of energy financing depends on predictable PPAs, lawful tariff regulation, transparent procurement and compliance with environmental law. (Indian Kanoon)

Ultimately, green financing should be viewed not simply as “finance for renewable energy”, but as a comprehensive legal and financial system connecting capital markets, electricity regulation, environmental governance, contractual certainty, investor protection and climate objectives. The effectiveness of this system depends upon credible disclosures, independent verification, bankable energy projects, predictable regulation and effective mechanisms for allocating project risks.