Corporate PPA in India: How Businesses Are Locking In Long-Term Renewable Energy at Fixed Tariffs
Introduction
Corporate Power Purchase Agreements -PPAs -have quietly become one of the most strategically important contracts a large Indian business can sign. A well-structured corporate PPA gives an organisation 15–25 years of renewable energy at a fixed tariff, eliminating exposure to rising grid rates, creating a verifiable carbon reduction, and satisfying an increasingly demanding set of ESG reporting obligations.
Yet despite their growing importance, corporate PPAs remain poorly understood outside specialist energy and finance teams. This article explains exactly how a corporate PPA works in India, what the main structures look like, what risks buyers must manage, and how to evaluate whether a PPA is the right procurement route for your organisation.
What Is a Corporate PPA?
A Power Purchase Agreement is a long-term contract between an electricity generator and a buyer, specifying the volume, price, and delivery mechanism for power. In a corporate PPA, the buyer is an industrial or commercial organisation -as distinct from a DISCOM or state electricity board.
In India, corporate PPAs typically take one of three forms:
1. On-site (Captive) PPA
The developer builds a solar or wind asset on the buyer’s property or adjacent land. The buyer purchases the power directly at a contracted tariff. Because the energy is consumed on-site, wheeling charges and open-access levies are minimal or absent. This is the simplest structure and the most common for rooftop and small ground-mount projects.
2. Off-site Open-Access PPA
The generator builds a plant at a separate location and delivers power to the buyer via the state transmission or distribution network under the open-access framework. The buyer pays the contracted solar tariff plus applicable open-access charges (wheeling, transmission, cross-subsidy surcharge, and scheduling charges). Net economics depend heavily on the state -charges vary from marginal to prohibitive.
3. Group Captive PPA
The buyer takes an equity stake of at least 26% in the generating company, and the project is structured as a captive power plant under the Electricity Act 2003. Group captive status confers favourable open-access charge treatment in most states. Multiple buyers can co-invest in a single plant, making this structure accessible to mid-sized consumers who cannot justify a dedicated asset.
Why Corporate PPAs Are Growing in India
Several convergent forces are driving corporate PPA adoption:
- Tariff risk management: Grid industrial tariffs in India have increased at roughly 4–6% per annum over the past decade. A 20-year PPA at ₹2.80/kWh locks in a rate that is likely to look very attractive by the mid-2030s.
- ESG and reporting pressure: CDP, BRSR, and global supply chain requirements increasingly demand proof of renewable procurement. A PPA delivers attributable, auditable renewable energy rather than an offset or a certificate.
- RE100 and SBTi commitments: Multinationals enrolled in RE100 or holding SBTi targets must procure renewable energy equivalent to 100% of consumption by a specific date. PPAs are the primary delivery mechanism.
- Capital efficiency: An off-site or group captive PPA requires no capital outlay from the buyer. The developer finances and builds the asset; the buyer pays only for energy consumed.
Key Commercial Terms in a Corporate PPA
Understanding the commercial structure of a PPA requires familiarity with several key terms:
Tariff and escalation: Most PPAs specify a fixed base tariff with either zero escalation (fully fixed) or a modest annual escalation of 1–3%. The base tariff and escalation structure must be evaluated together against your forecast grid tariff trajectory.
Contract tenure: Typical terms are 15–25 years. Longer tenures offer greater tariff certainty but reduce flexibility. Early termination provisions, break clauses, and change-in-law protections should be examined carefully.
Contracted capacity vs. contracted energy: Some PPAs specify a capacity (MW) obligation; others specify an energy volume (MWh/year). The distinction matters for how shortfalls and curtailments are treated.
Deemed generation: If a generator is unable to supply contracted energy due to grid curtailment or force majeure, deemed generation clauses determine whether the buyer still pays. Poorly drafted clauses in this area have created significant disputes.
Change in law: Open-access charges are regulated and can change. Change-in-law provisions allocate the risk of regulatory change between generator and buyer.
Due Diligence Before Signing a Corporate PPA
A corporate PPA is a long-term financial commitment. Before signing, buyers should undertake:
- Developer creditworthiness: The developer must have the financial and technical capacity to build and operate the project for the contract term. Check balance sheets, existing portfolio performance, and references.
- Site and technology assessment: Commission an independent technical review of the proposed plant design, location, and yield assumptions. P90 generation estimates should be verified by a qualified independent engineer.
- State-specific charge modelling: Open-access charges must be modelled for your specific state, load profile, and consumption point. This analysis should cover multiple scenarios including regulatory change.
- Legal review: PPA contracts are complex and consequential. Engage legal counsel with energy sector experience to review dispute resolution, termination rights, step-in rights, and security package.
How Sundesh Supports Corporate PPA Transactions
Sundesh advises industrial and commercial buyers through the full corporate PPA lifecycle -from initial procurement strategy and developer shortlisting through commercial negotiation, technical due diligence, and contract execution. Our EPC background means we understand exactly what makes a generator’s project financially and technically credible, which gives our clients a meaningful advantage at the negotiating table.
Conclusion
A corporate PPA, structured correctly, is one of the most effective tools available to an Indian business seeking to control long-term energy costs while meeting sustainability commitments. The procurement landscape in India has matured significantly -developers, bankers, and legal advisors all have the experience to execute these transactions efficiently. The remaining constraint is usually buyer familiarity with the structure and terms.
If your organisation is evaluating renewable energy procurement options, contact Sundesh to understand whether a corporate PPA is the right fit -and what a competitive structure looks like for your scale, state, and consumption profile.
FAQs
How long does it take to sign and commission a corporate PPA in India?
Commercial negotiation and signing of a corporate PPA typically takes 3–6 months, including developer shortlisting, technical due diligence, and legal review. Construction and commissioning of the underlying renewable asset adds a further 9–18 months for ground-mount projects. Group captive structures require additional time for equity structuring.
Does a corporate PPA satisfy RE100 or SBTi requirements?
Yes, a well-structured corporate PPA with physical delivery of renewable energy is the preferred procurement mechanism under both RE100 and the Science Based Targets initiative. Virtual or financial PPAs without physical delivery are accepted under some frameworks but carry additional reporting obligations and do not reduce actual grid dependence.
What is a change-in-law clause in a PPA?
A change-in-law clause allocates the financial risk of future regulatory changes — such as revisions to open-access charges, taxes, or grid codes — between the generator and the buyer. Depending on drafting, cost increases may be passed through to the buyer or absorbed by the developer. This clause requires careful legal review before signing.
What is a typical corporate PPA tariff in India in 2026?
Corporate PPA solar tariffs for industrial consumers in India typically range from ₹2.50–₹3.20/kWh depending on plant location, structure type, escalation terms, and project scale. Off-site open-access tariffs appear lower but must be evaluated net of wheeling, transmission, and cross-subsidy surcharge to arrive at a comparable delivered cost.
How does a group captive solar PPA work?
In a group captive structure, the buyer takes an equity stake of at least 26% in the generating company, classifying the arrangement as a captive power plant under the Electricity Act 2003. This confers favourable open-access charge treatment in most states. Multiple buyers can co-invest in a single plant, making the structure viable for mid-sized consumers.
What is a corporate PPA in India?
A corporate Power Purchase Agreement (PPA) is a long-term contract between an industrial or commercial buyer and a renewable energy generator, fixing the price and volume of electricity supplied for 15–25 years. In India, corporate PPAs take three main forms: on-site captive, off-site open-access, and group captive — each with different charge treatment and capital requirements.