Open Access Solar allows large consumers to buy power directly from independent solar plants at far lower tariffs than the grid. It offers scale, flexibility, and long-term cost stability.
What Is Open Access and How It Works
Open access allows commercial and industrial consumers with high power demand to buy electricity from an off-site solar plant using the state transmission and distribution network. Power flows from the generating plant to the consumer via the grid, and charges are paid based on usage. This model enables installations of 5 MW to 100 MW or more, far exceeding rooftop potential. It also works across multiple corporate locations, making it ideal for large firms.
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Benefits: Lower Tariffs and Flexible Sourcing
Open access solar tariffs range from ₹3.2 to ₹5.5 per unit, significantly cheaper than grid tariffs of ₹9–₹14 per unit. Open access consumers can choose between captive, group captive, or third-party models depending on their equity contribution and risk appetite. This flexibility allows companies to secure long-term PPAs, ensure predictable pricing, and reduce operational expenditure with immediate effect.
With solar tariffs at historic lows, improved policy clarity, and the expansion of group captive models, 2025 offers the strongest financial case for open access adoption. Industries can lock power prices for 20–25 years, meet sustainability targets, and reduce dependence on volatile grid tariffs. Rising ESG scrutiny further accelerates the shift.
Wheeling, Banking & Regulatory Considerations
A more strategic and efficient process
Using the grid for power transfer incurs wheeling, transmission, banking, and cross-subsidy charges, which vary by state. Some states allow monthly banking, while others restrict it to daytime hours. Regulatory policies are evolving, with more states simplifying approvals and reducing open access surcharges to promote renewable adoption. Understanding state-specific rules is essential for accurate ROI modeling.
“Open access isn’t just cheaper power—it’s energy freedom for large consumers.”