ESG

What is ESG

ESG, Environmental, Social and Governance, is the framework for assessing and reporting corporate sustainability performance. Environmental covers climate impact, resource use, waste and biodiversity. Social covers labour practices, community relations, human rights and product responsibility. Governance covers board structure, executive compensation, risk management and business ethics.

For corporates, ESG reporting has shifted from voluntary to increasingly mandatory. India’s BRSR (Business Responsibility and Sustainability Report) is mandatory for the top 1,000 listed companies since FY 2022-23. BRSR Core, a subset requiring third-party assurance, applies to the top 150 listed companies.

Solar adoption is the most visible and quantifiable lever for the E (environmental) component. Solar directly reduces Scope 2 emissions (from purchased electricity) and supports corporate net-zero commitments. Indian listed companies report renewable energy share in their BRSR submissions, making solar adoption a tracked metric.

Why ESG matters

Regulatory compliance. BRSR is mandatory for Indian listed companies.

Investor screening. ESG funds screen companies on E, S and G metrics.

Cost of capital. Strong ESG performers access cheaper finance, and lenders increasingly weigh a company’s cost of capital against its renewable energy share.

Talent attraction. Younger workforce values ESG-aligned employers.

Customer demand. Sustainable supply chain requirements from B2B customers.

Risk management. Climate risks materially affect business.

ESG and solar

Corporates typically start with a turnkey commercial solar installation sized against annual grid consumption, then layer in a power purchase agreement for loads beyond rooftop capacity or a RESCO partner that owns and maintains the plant on a zero-capex basis. For sizing and return calculations at C&I scale, see Solar IRR and Payback for C&I in India.

Technical deep dive

Indian BRSR structure

NGRBC Principles include environment, ethics, employee welfare and stakeholder responsiveness.

Scope 2 emission factor

Indian grid emission factor (2024 approximate): 0.71 kgCO2/kWh.

Indian ESG reporting standards

Solar contribution to RE share

Common Indian C&I corporate targets: 30 to 50 percent RE share by 2030. Corporates modelling the glide path to that target often use solar financial modeling tools to project savings against BRSR-linked commitments.

Real-world applications

BRSR reporting by listed companies.

Sustainability reports for unlisted companies seeking investment.

Carbon footprint quantification.

Investor presentations to ESG funds.

Supply chain sustainability disclosures.

Tender bid documents with ESG scoring.

Advantages of solar for ESG

Direct, auditable, quantifiable contribution.

Visible to all stakeholders.

Aligned with global frameworks.

Cost reduction alongside ESG benefit, aligned with a favourable LCOE trend.

Long-term commitment (25-year asset).

Limitations

ESG reporting is one tool, not the whole strategy.

Variability across reporting frameworks.

Risk of greenwashing if claims are not substantive.

Data quality challenges in supply chain Scope 3.

Common ESG and solar problems

Overstating renewable energy share through accounting tricks.

Buying RECs without on-site solar adoption.

Insufficient measurement of solar generation.

Greenwashing claims unsupported by data.

Failure to align ESG strategy with operational practice.

Best practices

Combine on-site solar with off-site PPAs and RECs as needed.

Use third-party verified emission data.

Report consistently across multiple frameworks.

Align ESG targets with measurable solar adoption.

Document Scope 2 reduction with metered solar data.

Integrate ESG into business strategy, not just reporting.

Indian market context

BRSR became mandatory in FY 2022-23 for top 1,000 listed companies.

BRSR Core mandatory with assurance for top 150 from FY 2023-24.

SEBI also mandates sustainability disclosures for IPOs and rights issues.

Major Indian corporates with significant solar adoption: Tata Group, Reliance Industries, Mahindra Group, Infosys, Wipro, TCS.

RE100 (renewable electricity 100 percent target) membership growing among Indian corporates, reflected in broader India solar statistics for 2026.

Multi-site corporate rollouts often require MW-scale EPC project management to keep BRSR-linked installation timelines on track. Some large industrial ESG programmes now extend decarbonisation beyond electricity to green hydrogen for hard-to-abate processes and to EV charger rollouts for fleet electrification.

Standards and certifications

Common mistakes

Reporting renewable share without verification.

Buying low-quality offsets.

Greenwashing claims.

Inconsistent reporting across years.

Failure to align ESG with operational practice.

Key takeaways

ESG is the framework for corporate sustainability reporting. Indian BRSR is mandatory for top 1,000 listed companies. Solar is the most direct lever for Scope 2 emission reduction and renewable energy share. Quantifiable, auditable contribution to environmental targets. Combined with strong S and G performance, ESG-aligned companies access lower cost of capital, better investor relations and stronger talent attraction.

Further reading

For how ESG plays out in real projects, these guides go deeper:

• Case Study, 200 kW Solar at a Chennai IT Park
• Net Metering in India, Complete 2026 Guide
• Best Solar Design Software Philippines: 2026 Guide
• Best Solar Design Software Saudi Arabia: 2026 Guide

Sources

• SEBI BRSR Framework, Securities and Exchange Board of India.
• BRSR Core Reporting Format.
• GRI Standards, Global Reporting Initiative.
• ISSB IFRS S1 and S2.
• TCFD Recommendations.
• CDP Climate Disclosure.
• Science Based Targets initiative (SBTi).
• RE100 Annual Disclosure.
• IEA Renewables 2024.