Gujarat Reduces Renewable-Power Banking Charge, Prepares Cost-Based Regime for 2027

Gujarat is moving toward a cost-based renewable power grid regime, altering how industrial plants manage surplus solar generation. Starting September 1, 2026, the state has reduced its renewable-power banking charge to ₹1 per unit from ₹1.50 a unit. The Gujarat Electricity Regulatory Commission stated that this rate will remain effective through March 31, 2027.

Under the banking mechanism, industrial facilities—such as Keshavbhai Shah’s automotive-fastener plant in Sanand—can inject surplus solar power generated during peak daylight hours into the grid. In return, they earn energy credits to draw power when their machinery requires electricity beyond panel generation, acting as a virtual battery without the need for expensive physical installations. For an illustrative 200-kW solar installation generating 3.5 lakh units annually, a 50-paise reduction on a quarter of that power saves roughly ₹44,000 a year on an annualized basis.

A more significant regulatory shift is scheduled for April 1, 2027, when Gujarat transitions from a predetermined banking charge to a model based on the actual cost of shifting renewable electricity through the grid. Under this upcoming framework, distribution companies (DISCOMs) seeking to levy charges must supply accurate and sufficient data to substantiate their claims. Failure to do so will result in the banking charge being treated as nil until proper information is provided.

The annual calculations will rely on actual 15-minute injection and consumption data, incorporating factors such as power-exchange prices, marginal thermal and gas generation costs, backing-down and storage costs, transmission charges, and network losses. This accounts for the time-of-day value discrepancy, as surplus solar power injected at midday often differs in value from electricity supplied after sunset.

The policy changes arrive as open-access solar expands across key industrial states. Data from June 2026 indicates that Maharashtra, Gujarat, Tamil Nadu, Karnataka, and Rajasthan accounted for approximately 27.7 GW, or 77 percent, of India’s 36 GW open-access solar capacity. Assuming a 20 percent capacity utilization, this infrastructure could generate around 48.6 billion units annually.

CleanMax regulatory filings referencing CRISIL Intelligence benchmarks indicate that group-captive renewable electricity costs range between ₹4.60 and ₹5.90 per unit across these five states, compared to industrial grid costs of ₹6.90 to ₹10.40. With weighted savings between ₹2.50 and ₹3.10 for every displaced grid unit, potential annual industrial electricity cost savings are estimated at ₹12,100 to ₹15,100 crore. Grid banking preserves a portion of these savings when generation and consumption cycles do not align.

Other states have implemented varying regulatory approaches. Maharashtra restricts banking adjustments across time-of-day periods, Rajasthan and Karnataka impose an 8 percent in-kind deduction, and Tamil Nadu applies an 8 percent charge to eligible captive transactions while disallowing banking for third-party purchases or sales.

As battery and banking technologies continue to address the challenge of matching renewable supply with industrial demand, manufacturers will weigh the all-in cost of grid banking against investing in physical storage systems. For now, Gujarat has lowered the financial barrier for grid usage while setting a transparent, data-driven standard for utilities beginning in April 2027.

"The transition toward a cost-based grid banking regime in Gujarat highlights a maturing regulatory framework for industrial renewable energy adoption. By lowering short-term banking charges and demanding data-backed justifications from utilities for future pricing, the state is providing much-needed clarity for businesses relying on open-access solar. As industrial players navigate complex generation curves and grid costs, transparency in utility pricing will play a critical role in determining whether manufacturers invest in on-site storage or leverage existing grid infrastructure." — Dr. Shishir Gupta, Founder & CEO, StartupLanes