India’s green energy sector may be hit by power regulator’s stricter performance standards

The Central Electricity Regulatory Commission (CERC) has issued new orders tightening deviation settlement mechanism (DSM) norms for wind and solar power gen...

What Happened

The Central Electricity Regulatory Commission (CERC) has issued new orders tightening deviation settlement mechanism (DSM) norms for wind and solar power generators, with phased implementation from April 1, 2026 through March 2031.
For solar and solar-hybrid projects, the tolerance band — within which no penalty applies — narrows from ±10% to ±5%; for wind projects, from ±15% to ±10%.
A phased "X-factor" reduction scheme means existing renewable projects will progressively lose concessional deviation treatment: from 100% in 2026-27 to zero by April 2031, when they will be treated on par with conventional thermal generators.
An industry study by Grid India estimates wind energy companies could face revenue losses of up to 48% once fully implemented; solar and hybrid projects may see revenue declines of around 11%.
Writ petitions challenging the order have been filed in the Delhi High Court; Karnataka High Court has stayed stricter penalties for solar and wind firms in the interim.
CERC's rationale is grid stability: as renewable penetration grows, generators must meet the same scheduling discipline as conventional plants to prevent frequency fluctuations.

Static Topic Bridges

Central Electricity Regulatory Commission (CERC)

CERC is a statutory body established under Section 76 of the Electricity Act 2003, with quasi-judicial status. It is the central-level regulator for the power sector in India, responsible for tariff regulation of central-sector generators, inter-state transmission, and grid operations. CERC consists of a Chairperson and three Members (plus the Chairperson of the Central Electricity Authority as an ex-officio Member), appointed for five-year terms or until the age of 65. At the state level, State Electricity Regulatory Commissions (SERCs) perform analogous functions for intra-state generation and distribution.

Established under: Electricity Act, 2003 (Section 76).
Functions under Section 79 of the Act: regulate tariffs for central-sector generators, regulate inter-state transmission, adjudicate inter-utility disputes, advise on National Electricity Policy.
CERC's decisions are appellate to the Appellate Tribunal for Electricity (APTEL).
The Electricity Act 2003 replaced three earlier acts: the Electricity (Supply) Act 1948, the Electricity Regulatory Commissions Act 1998, and the Indian Electricity Act 1910.
CERC also frames Renewable Energy Certificate (REC) regulations and Renewable Purchase Obligation (RPO) guidelines.

Connection to this news: CERC is the authority that issued the stricter DSM norms — understanding its statutory basis and powers is essential to assessing whether the norms can withstand legal challenge.

Deviation Settlement Mechanism (DSM) and Grid Discipline

The Deviation Settlement Mechanism (DSM) — governed by CERC's DSM Regulations — is the framework under which electricity generators and distribution companies are penalised or compensated for deviating from their scheduled injection or drawal of power. It was introduced in India as a market-based tool to enforce grid discipline, replacing the earlier Unscheduled Interchange (UI) mechanism. Conventional thermal and hydro generators have historically faced strict DSM norms. Renewable energy generators were given a concessional "X-factor" deviation allowance because solar and wind output is inherently variable and weather-dependent.

DSM was introduced in India under CERC's DSM Regulations 2014, later amended multiple times.
The "X-factor" for renewables allowed them to settle deviations at concessional rates — a recognition of their intermittency.
With India's renewable capacity exceeding 242 GW (as of mid-2025), CERC argues the sector is mature enough to bear grid discipline obligations.
For new projects commissioned from April 2026 onwards, no concessional X-factor will apply from the start.
The phased schedule for existing projects: X = 100% (2026-27), 80% (2027-28), 60% (2028-29), 40% (2029-30), 20% (2030-31), 0% (from April 2031).

Connection to this news: The core of CERC's new norms is the elimination of the DSM X-factor for renewables — a policy shift that treats solar and wind as mature grid participants rather than intermittent newcomers deserving special treatment.

India's Renewable Energy Targets and the 500 GW Goal

India committed at COP26 (Glasgow, 2021) to achieving 500 GW of installed electricity capacity from non-fossil fuel sources by 2030. As of June 2025, India had installed 242.8 GW of non-fossil fuel capacity (233.99 GW renewable + 8.8 GW nuclear), crossing the milestone of 50% non-fossil fuel share in total installed capacity — five years ahead of the Paris Agreement target. Solar energy led with 105.65 GW installed capacity; wind added 4.15 GW in FY2024-25. India has 169.4 GW under implementation and 65 GW tendered.

India's 500 GW non-fossil fuel target: committed at COP26, Glasgow, November 2021.
Total installed capacity (May 2025): approximately 484.82 GW; non-fossil fuel share: 50.07%.
Solar installed: 105.65 GW; Wind installed: approximately 47–50 GW.
India's NDC (Nationally Determined Contribution) target: 50% cumulative electric power from non-fossil fuel by 2030 — achieved in June 2025.
Investment required for 500 GW target: estimated $223 billion (2022–2029) + $26 billion for battery storage.
Ministry of New and Renewable Energy (MNRE) oversees the sector; Solar Energy Corporation of India (SECI) is the central nodal agency for large-scale procurement.

Connection to this news: Stricter CERC norms could affect the project economics of solar and wind developers, potentially slowing capacity additions at a time when India must accelerate renewable deployment to meet its 2030 targets.

Renewable Energy Economics: Grid Parity and Merchant Risk

The financial viability of solar and wind projects in India is based on long-term Power Purchase Agreements (PPAs) with state DISCOMs (Distribution Companies) or central utilities. Most projects are designed around a predictable revenue stream from scheduled generation. Stricter deviation penalties introduce "merchant risk" — exposure to market-based penalty charges whenever actual generation deviates from schedule due to weather variability. This increases the risk perception for lenders and investors, potentially pushing up the cost of capital for new projects.

Solar tariffs in India have fallen from over ₹10/kWh (2010) to below ₹2/kWh in some recent auctions.
Most renewable projects are bid under competitive tariff-based auctions (ISTS-connected projects via SECI; state projects via SERCs).
Deviation penalties under strict DSM can wipe out margins in low-tariff projects, especially small wind and solar developers.
Battery Energy Storage Systems (BESS) can help generators meet scheduling requirements — CERC's norms may thus incentivise storage integration.
Grid India (formerly POSOCO) is the national grid operator responsible for scheduling and dispatch.

Connection to this news: The revenue impact estimates (up to 48% for wind) highlight that CERC's grid-discipline rationale, while technically sound, creates serious commercial risks that could paradoxically slow India's energy transition by deterring investment.

Key Facts & Data

CERC established under: Electricity Act, 2003 (Section 76).
Tolerance band change — Solar/Hybrid: ±10% → ±5%.
Tolerance band change — Wind: ±15% → ±10%.
X-factor phase-out timeline: 100% (2026-27) → 0% (from April 2031).
Estimated revenue impact: Wind: up to 48% loss; Solar/Hybrid: approximately 11% loss (Grid India study).
India's total installed capacity (2025): ~484.82 GW; non-fossil fuel share: 50.07%.
Solar installed capacity (FY2024-25 end): 105.65 GW; added in FY2024-25: 23.83 GW.
India's 500 GW target: committed at COP26, 2021; deadline 2030.
Appellate authority over CERC orders: Appellate Tribunal for Electricity (APTEL).
Grid operator: Grid India (formerly POSOCO).
Renewable energy nodal agency: Solar Energy Corporation of India (SECI) under MNRE.
DSM Regulations: first issued by CERC in 2014; subsequently amended.