Industrial solar PPA tariffs in Tamil Nadu currently range from ₹2.80 – ₹4.20 per unit for third-party rooftop agreements. Utility-scale ground-mounted projects see competitive bids below ₹2.50/unit. Contracts typically span 15–25 years, delivering 30–60% savings vs. grid tariffs of ₹9–₹12/unit.
Sources: TANGEDCO Solar Policy 2024 | MNRE Tender Data Q1 2026 | Updated: March 2026
Electricity costs are a major concern for manufacturing industries in Tamil Nadu. To manage rising tariffs, many companies are exploring solar energy procurement models such as Solar Power Purchase Agreements (PPAs).
A solar PPA allows factories to purchase electricity generated by a solar plant at a predetermined tariff without investing capital in solar infrastructure.
What is a Solar PPA?
A solar power purchase agreement is a long-term contract between a factory and a solar developer. Under this model:
- the developer installs and operates the solar plant
- the factory purchases electricity at a fixed tariff
- the agreement usually lasts 15–25 years
Current Solar PPA Tariff Rates (2026)
Typical Solar Tariff Range
Solar PPA tariffs vary depending on project size and location. However, solar electricity is often significantly cheaper than conventional grid electricity.
Because grid tariffs can exceed ₹9–₹12 per unit in certain categories, solar power often provides cost savings for large consumers. (NoBroker)
Benefits for Industrial Consumers
Cost Savings
Factories can reduce electricity expenses by purchasing solar power at lower tariffs.
Long-Term Price Stability
Solar tariffs are usually fixed for the contract duration, protecting businesses from tariff hikes.
No Capital Investment
Solar developers finance the installation and maintenance of the system.
Industries Adopting Solar PPA in Tamil Nadu
Industries with high electricity consumption are the most likely to adopt solar PPAs.
These include:
- textile mills
- engineering industries
- automotive manufacturing
- food processing factories
- cold storage warehouses
📌 Policy Reference: As per the TANGEDCO Solar Policy 2024, third-party solar PPAs for industrial consumers are eligible for wheeling charges exemption for the first 5 years, with banking facilities up to 30% of injected energy.
Frequently Asked Questions
What is the solar PPA tariff in Tamil Nadu for industries in 2026?
In 2026, industrial solar PPA tariffs in Tamil Nadu typically range from ₹2.80 to ₹4.20 per unit for third-party agreements, depending on project size, location, and contract duration. Utility-scale bids have been recorded below ₹2.50/unit. These rates are significantly lower than commercial grid tariffs of ₹9–₹12/unit.
How long is a solar PPA contract in Tamil Nadu?
Solar PPA contracts in Tamil Nadu typically run for 15 to 25 years, providing long-term price stability and protection against grid tariff hikes. Most industrial agreements are structured for 20 years with optional renewal clauses.