What Happened
- India is reconsidering proposed tighter grid-supply penalties for wind and solar power producers under the Deviation Settlement Mechanism (DSM) after developers warned the rules would reduce revenues and deter clean-energy investment.
- The Central Electricity Regulatory Commission (CERC) had proposed reducing the DSM tolerance band for wind from ±15% to ±10% and for solar from ±10% to ±5%, making penalties sharper when actual generation deviates from the scheduled amount.
- Developers argue that wind and solar generation is inherently variable — dependent on weather, not operator control — and cannot be made to conform to tight schedules without expensive battery storage.
- The government is now consulting with stakeholders and may revise the penalty formula before finalisation, with the broader concern that over-penalising developers could slow India's clean energy build-out.
- India crossed 250 GW of non-fossil power capacity in August 2025 and currently has 262.74 GW (51.5% of total installed capacity); the 500 GW non-fossil target by 2030 requires roughly doubling this in five years.
Static Topic Bridges
CERC and the Indian Electricity Grid Code (IEGC)
The Central Electricity Regulatory Commission (CERC) is the apex statutory body regulating electricity tariffs, transmission, and grid operations for inter-state electricity and bulk power transactions. Established under the Electricity Act, 2003, CERC issues the Indian Electricity Grid Code (IEGC) — the technical rulebook governing how power plants connect to and interact with the national grid.
- CERC was established under the Electricity Regulatory Commissions Act, 1998, and reconstituted under the Electricity Act, 2003.
- IEGC 2023: the latest grid code, which governs scheduling, dispatch, deviation settlement, and grid security protocols for all generating stations.
- Must-run status: Under the IEGC, Renewable Energy Generating Stations (REGS) have "must-run" status — the grid operator cannot curtail their generation except for grid security or safety of equipment and personnel. This protects renewable developers' revenue but must be balanced against grid stability.
- Deviation Settlement Mechanism (DSM): A financial penalty/incentive mechanism requiring generators to schedule their generation day-ahead and face payments/charges when actual generation deviates from schedule. DSM is designed to incentivise grid discipline.
- State Electricity Regulatory Commissions (SERCs) regulate within-state distribution and retail supply; Distribution Companies (DISCOMs) — mostly state-owned — are the final buyers of power under Power Purchase Agreements (PPAs).
Connection to this news: CERC's proposed tighter DSM tolerance bands are intended to improve grid predictability, but they would effectively penalise the inherent variability of wind and solar — the same generators that hold "must-run" status precisely because the grid needs their output.
India's 500 GW Non-Fossil Fuel Target by 2030
India's Nationally Determined Contribution (NDC) under the Paris Agreement includes a target of 500 GW of non-fossil fuel-based installed electricity capacity by 2030. This is also a domestic commitment under India's long-term energy transition plan.
- India's installed non-fossil power capacity as of November 2025: 262.74 GW (51.5% of total 505 GW installed capacity).
- Target: 500 GW non-fossil by 2030 — requires adding approximately 240 GW of renewable capacity in five years.
- Breakdown of current renewable capacity: solar (~230 GW), wind (~50 GW), hydro (~47 GW), and other (nuclear, biomass, small hydro).
- The government has bid out 50 GW of renewable capacity per year (FY2023-24 to FY2027-28), including at least 10 GW of wind per year.
- Private renewable developers (Adani Green, ReNew, Greenko, etc.) account for the bulk of capacity addition; investor confidence in revenue predictability is critical to maintaining the pace of investment.
Connection to this news: Any policy that reduces revenue predictability for wind and solar developers directly risks slowing the pace of capacity addition needed to reach the 500 GW target — which is why the government is now re-examining the penalty regime before it takes effect.
Renewable Energy and Grid Stability: The Core Tension
The fundamental challenge is that renewable energy is intermittent — output depends on wind speed and solar irradiance, not on operator commands. Grids are designed around the principle of real-time supply-demand balance: any mismatch causes frequency deviations, which can damage equipment or trigger blackouts. As the share of renewables in India's grid rises above 50%, managing this variability becomes increasingly critical.
- CERC has already warned solar and wind plants of disconnection for repeated violations of Low Voltage Ride Through (LVRT) and High Voltage Ride Through (HVRT) norms — indicating a genuine grid stability problem.
- Grid flexibility solutions include battery energy storage systems (BESS), pumped hydro, and flexible gas-based peaking plants — all expensive.
- CERC's IEGC amendment for renewable projects: infirm power injection allowed for up to 45 days after first energisation (vs. 1 year for conventional plants), recognising that storage integration takes time.
- DISCOMs are often slow to purchase renewable energy and build the required transmission infrastructure, compounding curtailment risk for developers.
Connection to this news: India faces a genuine dilemma — tighter grid rules improve system stability but penalise investors; looser rules protect investment but may lead to grid indiscipline. The government's decision to revisit the rules suggests it currently prioritises investment momentum over tighter grid discipline.
Key Facts & Data
- India's non-fossil power capacity (Nov 2025): 262.74 GW — 51.5% of total 505 GW.
- 500 GW non-fossil target: by 2030 (Paris Agreement NDC commitment).
- CERC proposed DSM change: wind tolerance band ±15% → ±10%; solar ±10% → ±5%.
- IEGC 2023: current operative grid code (with first amendment in 2024).
- Must-run status for renewables: subject only to grid security and equipment safety exceptions.
- Infirm power injection window for REGS: 45 days (vs. 1 year for conventional generators).
- India's annual renewable energy bid target: 50 GW/year (FY24-FY28), including 10 GW/year wind.
- CERC established under Electricity Act, 2003.