Renewable Energy Certificate

What is a Renewable Energy Certificate

A Renewable Energy Certificate (REC) is a tradable instrument representing the renewable attribute of one megawatt-hour (MWh) of electricity generated from a renewable source. It is the Indian market-based mechanism that separates the green attribute from the underlying electricity, allowing generators to monetise the renewable attribute through trading on power exchanges.

Introduced by CERC in 2010 (CERC REC Regulations 2010), the REC mechanism enables Renewable Purchase Obligation (RPO) compliance for distribution licensees and open access consumers. A generator selling electricity at a non-preferential tariff can claim RECs for the renewable generation; an obligated entity short on physical renewable purchases can buy RECs to fulfil RPO.

For Indian solar, RECs are most relevant for:

• Renewable generators selling electricity at average pooled cost
• Open access consumers procuring solar with separated REC, common among large industrial buyers
• Corporates pursuing voluntary green claims under RE100, BRSR or ESG frameworks

Why RECs matter

RPO compliance. RECs enable DISCOMs and obligated entities to meet renewable purchase obligations even when physical renewables are unavailable. For a captive factory, avoiding an RPO shortfall penalty (often priced at the going REC rate) is a second financial lever alongside the direct bill savings; see solar inverter for factory and industrial loads for the worked penalty math.

Generator revenue. Provides a second revenue stream beyond electricity sale.

Corporate green claims. Allows companies to procure renewable attributes without on-site solar or matching PPAs.

Market signal. REC prices indicate the marginal value of renewable energy.

Flexibility. Decouples physical electricity from renewable attribute trading.

REC issuance process

1. Renewable generator registers with central or state nodal agency.
2. Generation metered through CEA-approved meters.
3. Energy data submitted to State Load Despatch Centre (SLDC).
4. SLDC verifies data and forwards to National Load Despatch Centre (NLDC).
5. NLDC issues RECs based on verified generation.
6. RECs deposited in the generator’s account on the exchange.
7. Generator places sell orders on IEX or PXIL.
8. RECs traded in monthly sessions.

Technical deep dive

REC types (current framework)

Earlier separation between solar and non-solar has been progressively merged.

Trading sessions

Price history (Solar RECs, ₹/MWh)

Prices have collapsed as renewable supply outpaced RPO compliance demand.

Floor and forbearance

Periodically revised by CERC.

Validity

RECs valid for 1,095 days (3 years) from issue. Older versions had 730 days.

Real-world applications

Renewable generator monetisation when selling at low PPA tariff or average pooled cost.

DISCOM RPO compliance.

Open access consumer RPO compliance, often paired with a C&I solar procurement strategy.

Corporate voluntary renewable claims, often structured by RESCOs for corporate buyers pursuing RE100 commitments; see the solar RESCO model in India for how developers bundle wheeling, banking and REC procurement into a single PPA.

RE100 reporting.

BRSR renewable energy share reporting.

REC vs PPA vs net metering

Advantages

Monetises renewable attribute separately.

Provides RPO compliance flexibility.

Supports corporate green claims.

Standardised, verified mechanism.

Encourages renewable generation in markets without direct PPA.

Limitations

Price volatility.

Limited liquidity in some periods.

Validity expiry reduces flexibility.

Quality questions about additionality.

Some ESG frameworks limit REC-based claims.

Common REC problems

Price collapse during oversupply periods.

Validity expiry without sale.

Regulatory amendments mid-cycle.

DISCOM non-compliance with RPO reducing demand.

Corporate buyer scepticism about additionality claims.

Best practices

Combine RECs with physical renewable generation, such as on-site commercial solar, rather than relying on certificates alone.

Verify CERC certificate before trading.

Track validity to avoid expiry.

Use RECs as part of broader ESG strategy, not sole basis for claims.

Document REC purchases in sustainability reports.

Indian market context

NLDC operates the REC registry.

IEX and PXIL are the only authorised trading platforms.

CERC REC Regulations 2022 set the current framework.

Total RECs issued cumulative through 2024: roughly 100 million.

State RPO trajectories drive demand.

Corporate voluntary demand growing through RE100 and BRSR.

Standards and certifications

Common mistakes

Letting RECs expire without sale.

Assuming REC purchase substitutes for physical renewable generation.

Buying RECs without checking trading platform validity.

Skipping documentation in ESG reports.

Over-reliance on RECs alone for green claims.

Key takeaways

RECs are tradable certificates representing 1 MWh of renewable generation. Indian RECs are issued by NLDC under CERC framework and traded on IEX and PXIL. Solar REC prices have stabilised around ₹1,000 to ₹1,500/MWh. RECs enable RPO compliance, generator monetisation and corporate green claims. They complement but do not replace physical renewable generation in best-practice ESG strategy.

Further reading

For how Renewable Energy Certificate plays out in real projects, these guides go deeper:

• MNRE Rooftop Solar Scheme, Complete 2026 Guide
• What Is Solar Energy, Beginner’s Guide for India
• Solar for School and College India
• Solar for Hotels and Hospitality India

Sources

• CERC REC Regulations 2022.
• Electricity Act 2003.
• IEX and PXIL trading documentation.
• National Load Despatch Centre REC registry.
• State SERC RPO regulations.
• RE100 Technical Criteria.
• BRSR Reporting Framework, SEBI.
• IEA Renewables 2024.
• IRENA Renewable Energy Auctions report.