Regional spotlight: Grid modernization & storage in India — what's different and why it matters

India added 18.5 GW of renewable energy capacity in the fiscal year ending March 2025, pushing the country's total non-fossil fuel installed capacity past 200 GW for the first time (Ministry of New and Renewable Energy, 2025). Yet curtailment of renewable generation exceeded 8.2 TWh during the same period, a 34% increase over the prior year, because the transmission and distribution infrastructure could not absorb what the generation fleet produced. For procurement professionals sourcing energy storage systems, grid automation equipment, or ancillary services in India, the gap between installed generation and deliverable power defines both the opportunity and the risk. India's grid modernization challenge is structurally different from those in the US, Europe, or China, and strategies imported from those markets fail with striking regularity.

Why It Matters

India operates one of the world's largest synchronous grids: five regional grids interconnected into a single national system serving 1.45 billion people across 28 states and 8 union territories. Peak electricity demand reached 243 GW in May 2025, up from 215 GW just two years earlier, driven by accelerating industrialization, urban cooling loads, and the electrification of transport (Central Electricity Authority, 2025). The government's target of 500 GW of non-fossil fuel capacity by 2030 requires not just generation buildout but a fundamental transformation of the grid's ability to manage variable renewable energy.

The financial scale is enormous. The National Infrastructure Pipeline allocates approximately $68 billion equivalent (INR 5.7 lakh crore) to power transmission and distribution upgrades through 2030. State electricity distribution companies (DISCOMs) collectively carry outstanding debt of $52 billion, creating a tension between the investment required for grid modernization and the institutional capacity to finance it. For international equipment suppliers and project developers, India represents the world's largest addressable grid modernization market outside China, but the procurement landscape, regulatory environment, and technical requirements diverge sharply from Western benchmarks.

Key Concepts

The DISCOM Challenge

India's power distribution is managed by state-owned DISCOMs, most of which operate with aggregate technical and commercial (AT&C) losses between 15 and 25%, compared to 5 to 7% in developed markets. These losses mean that for every unit of electricity purchased from generators, DISCOMs deliver and collect revenue on only 75 to 85 cents' worth. The Revamped Distribution Sector Scheme (RDSS), launched in 2021 with a central government allocation of $4.1 billion, targets reduction of AT&C losses to 12 to 15% by 2026 through smart metering, feeder segregation, and distribution automation. As of March 2025, approximately 52 million smart meters had been installed against a target of 250 million, reflecting procurement delays, state-level resistance, and interoperability challenges between meter vendors (Power Finance Corporation, 2025).

Renewable Energy Certificates and Open Access

India's renewable energy procurement operates through a dual mechanism: Renewable Energy Certificates (RECs) and the open access framework. RECs allow large consumers to purchase renewable energy credits from generators anywhere on the grid. Open access permits consumers with loads exceeding 1 MW (reduced from 10 MW) to procure electricity directly from generators using the transmission and distribution network for a wheeling charge. However, cross-subsidy surcharges imposed by DISCOMs on open access consumers effectively add 20 to 40% to the cost of open access power in many states, undermining the economic case for direct procurement. The Central Electricity Regulatory Commission issued revised regulations in 2024 reducing these surcharges, but implementation remains inconsistent across states, creating procurement complexity for multi-site industrial consumers.

Battery Energy Storage Targets

The Ministry of Power's National Framework for Promoting Energy Storage Systems targets 82 GWh of battery energy storage capacity by 2030. As of early 2026, only 3.2 GWh was operational, with an additional 15 GWh under construction or in advanced procurement. Solar Energy Corporation of India (SECI) has tendered 12 GWh of standalone battery storage capacity, with tariffs for storage services declining from INR 10.14 per kWh in the first tenders to INR 6.85 per kWh in the most recent rounds, a 32% reduction in under two years (SECI, 2025). The government's production-linked incentive (PLI) scheme for advanced chemistry cell (ACC) manufacturing has attracted commitments of $6.2 billion from domestic and international manufacturers, though factory commissioning timelines have slipped by 12 to 18 months across most awardees.

What's Working

India's Green Energy Corridor program, which builds dedicated transmission infrastructure to connect renewable energy zones to load centers, has completed 9,700 circuit-kilometers of new transmission lines and 22 substations under its Phase I, enabling evacuation of 24 GW of renewable capacity from Rajasthan, Gujarat, Tamil Nadu, and Karnataka. Phase II, targeting an additional 10,750 circuit-kilometers to support 20 GW of additional renewable capacity, is 40% complete with a 2027 target (Power Grid Corporation of India, 2025).

The real-time market (RTM) for electricity, launched by the Indian Energy Exchange in 2020, has transformed short-term power trading. RTM operates on a 15-minute dispatch interval, enabling generators and DISCOMs to balance supply and demand in near real-time. Trading volumes on the RTM reached 42 TWh in calendar year 2025, with prices during peak solar hours falling to INR 1.5 to 2.0 per kWh, creating viable arbitrage opportunities for battery storage operators who can purchase during solar surplus and discharge during evening peak periods when prices reach INR 6 to 10 per kWh (Indian Energy Exchange, 2025).

Tata Power Delhi Distribution Limited (TPDDL) has deployed a comprehensive grid automation platform across its 7 million customer service area in North Delhi, achieving AT&C losses below 7.5%, comparable to European utility benchmarks. The system integrates advanced metering infrastructure (AMI) with 2.1 million smart meters, automated fault detection and isolation with service restoration (FDIR) on 1,200 feeders, and a distributed energy resource management system (DERMS) managing 340 MW of rooftop solar. TPDDL's model demonstrates that Indian DISCOMs can achieve world-class operational performance with the right investment and institutional commitment (Tata Power, 2025).

What's Not Working

Land acquisition for transmission infrastructure remains the single largest bottleneck. The Green Energy Corridor Phase II has experienced average delays of 22 months per substation due to land disputes, environmental clearances, and right-of-way negotiations. A 765 kV transmission line connecting the Khavda Renewable Energy Park in Gujarat (the world's largest at 30 GW planned capacity) to the Western regional grid was delayed by 30 months, resulting in estimated curtailment losses of $340 million for solar and wind developers who had commissioned generation capacity ahead of evacuation infrastructure (Gujarat Energy Transmission Corporation, 2025).

The financial health of DISCOMs constrains procurement of grid modernization equipment. Eleven states have DISCOMs with debt-to-equity ratios exceeding 15:1, making them unable to access commercial credit for capital expenditure. The RDSS scheme requires states to submit reform-linked action plans as a condition for central funding, but only 14 of 28 states had approved action plans as of December 2025. The remaining states face a circular problem: they cannot modernize without capital, and they cannot attract capital without demonstrating reform commitments.

Domestic battery cell manufacturing has lagged targets significantly. Of the 50 GWh in ACC manufacturing capacity allocated under the PLI scheme, only 6 GWh was operational by early 2026. Reliance New Energy Solar, Ola Electric, and Rajesh Exports, among others, have encountered delays in technology transfer agreements, equipment procurement, and factory construction. India imported 89% of its lithium-ion cells in 2025, predominantly from China, creating supply chain vulnerability and limiting the government's "Make in India" ambitions for the energy storage sector (India Energy Storage Alliance, 2025).

Interoperability of smart grid systems presents a persistent technical challenge. Different states have procured smart meters, distribution automation systems, and SCADA platforms from different vendors with incompatible communication protocols and data formats. The Bureau of Indian Standards published IS 16444 and IS 15959 smart meter standards, but enforcement is inconsistent. A 2025 audit by the Central Electricity Authority found that 34% of installed smart meters could not communicate data to the head-end systems of other vendors, making multi-vendor environments unmanageable (Central Electricity Authority, 2025).

Key Players

Established:

• Power Grid Corporation of India: operates 174,000 circuit-kilometers of transmission lines and manages the national grid's inter-regional power transfer, currently at 112 GW capacity
• Tata Power: operates distribution networks in Delhi, Mumbai, and Odisha, with the most advanced grid automation deployments in India
• Adani Transmission: India's largest private transmission company with 20,400 circuit-kilometers of lines and $3.2 billion in planned grid infrastructure investment through 2028
• Siemens India: supplies gas-insulated switchgear, HVDC converter stations, and digital grid management platforms, with a manufacturing base in Goa and Aurangabad
• ABB India: provides grid automation, protection relay systems, and substation automation equipment from domestic manufacturing facilities

Startups:

• Gridscape Solutions: develops AI-driven distribution transformer monitoring and predictive analytics for Indian utility conditions
• Greenjoules: provides behind-the-meter battery storage and optimization for commercial and industrial open access consumers
• EcoZen Solutions: manufactures cold storage systems with integrated solar and battery for rural agricultural supply chains
• Repos Energy: deploys mobile energy storage units for distributed diesel displacement in off-grid and weak-grid areas
• Oorjan Cleantech: offers rooftop solar and battery storage procurement-as-a-service for small and medium enterprises

Investors:

• India Infrastructure Finance Company Limited (IIFCL): provides long-term debt for transmission and distribution projects
• Green Growth Equity Fund (managed by EverSource Capital): a $700 million India-focused clean energy infrastructure fund backed by the National Investment and Infrastructure Fund
• Asian Development Bank: has committed $3 billion in grid modernization financing across six Indian states
• Macquarie Group: invested $1.2 billion in Indian transmission assets through its acquisition of Sterlite Power's interstate transmission business

Action Checklist

• Evaluate cross-subsidy surcharge structures in each target state before committing to open access procurement strategies, as costs vary by 20 to 40% across jurisdictions
• Specify IS 16444 and IS 15959 compliance in all smart meter and distribution automation procurements to ensure interoperability
• Include land acquisition risk assessment and timeline buffers of 18 to 24 months in transmission-dependent project schedules
• Structure battery storage contracts with tariff indexation to SECI benchmark pricing, which has declined 15 to 20% annually
• Assess DISCOM creditworthiness using AT&C loss data and debt-to-equity ratios before entering power purchase agreements in any state
• Build domestic cell manufacturing timelines into storage procurement plans, with contingency sourcing from Chinese and South Korean suppliers for near-term projects
• Engage with state electricity regulatory commissions early on open access approvals, as processing times range from 3 to 18 months depending on the state

FAQ

Q: How does India's grid modernization procurement process differ from Western markets? A: Indian grid procurement operates through a combination of central tenders (managed by SECI, Power Grid Corporation, or the Rural Electrification Corporation) and state-level tenders issued by individual DISCOMs. Central tenders follow a transparent reverse auction model with pre-qualification criteria, while state tenders vary significantly in process rigor, payment terms, and technical specifications. Payment delays of 90 to 180 days are common with state DISCOMs, requiring suppliers to factor working capital costs into bid pricing. Procurement professionals should also account for the goods and services tax (GST) implications of inter-state equipment supply, customs duty exemptions under the National Solar Mission, and the domestic content requirements under the PLI scheme.

Q: What battery chemistries are most suitable for India's grid storage applications? A: Lithium iron phosphate (LFP) currently dominates India's grid storage procurement, accounting for 85% of tendered capacity, due to its thermal stability in India's high ambient temperature environment (35 to 48 degrees Celsius in many deployment locations), cycle life exceeding 6,000 cycles, and absence of cobalt and nickel supply chain risks. Sodium-ion batteries are emerging as a potential alternative for stationary storage, with Reliance and Amara Raja announcing pilot manufacturing lines. Flow batteries (vanadium redox and iron-air) are being evaluated for long-duration storage applications, but no utility-scale deployments have been commissioned in India as of early 2026.

Q: What are the realistic timelines for battery storage project development in India? A: From tender award to commercial operation, Indian battery storage projects typically require 18 to 30 months: 3 to 6 months for financial closure and land acquisition, 6 to 10 months for equipment procurement and delivery (longer if dependent on imports), 4 to 8 months for construction and commissioning, and 2 to 4 months for grid connectivity and regulatory approvals. Projects connected to the interstate transmission system managed by Power Grid Corporation have shorter connectivity timelines than those requiring coordination with state transmission utilities.

Q: How can international suppliers navigate the "Make in India" requirements? A: International equipment suppliers should evaluate establishing local manufacturing or assembly operations. The PLI scheme provides 5 to 20% production-linked subsidies for qualifying manufacturing investments. Joint ventures with Indian partners such as Mahindra, Tata, or Adani provide both manufacturing infrastructure and distribution networks. For near-term projects, equipment can be imported with applicable customs duties (5 to 15% for most grid equipment, with exemptions available under the National Solar Mission for qualifying renewable energy components), but upcoming domestic content requirements for government-tendered projects will increasingly favor local production.

Sources

• Ministry of New and Renewable Energy. (2025). Annual Report 2024-25: Renewable Energy Capacity Additions and Grid Integration. New Delhi: Government of India.
• Central Electricity Authority. (2025). National Electricity Plan 2023-2032: Transmission and Smart Grid Assessment. New Delhi: Government of India.
• Power Finance Corporation. (2025). Report on Performance of State Power Utilities 2024-25. New Delhi: PFC Ltd.
• Solar Energy Corporation of India. (2025). Battery Energy Storage System Procurement Update: Tender Results and Tariff Trends. New Delhi: SECI.
• Power Grid Corporation of India. (2025). Green Energy Corridor Phase I and Phase II: Progress Report. Gurugram: PGCIL.
• Indian Energy Exchange. (2025). Annual Market Report 2025: Real-Time Market Performance and Price Analytics. New Delhi: IEX.
• India Energy Storage Alliance. (2025). India Energy Storage Market Monitor: Domestic Manufacturing Status and Import Trends. Mumbai: IESA.
• Tata Power. (2025). Delhi Distribution Limited: Smart Grid and Distribution Automation Performance Report. Mumbai: Tata Power Company Limited.
• Gujarat Energy Transmission Corporation. (2025). Khavda Renewable Energy Park Transmission Corridor Status Report. Vadodara: GETCO.