TNERC Introduces Comprehensive Draft Regulations For Solar PV Generating Systems In Tamil Nadu

Posted On - 6 July, 2024 • By - King Stubb & Kasiva


The Tamil Nadu Electricity Regulatory Commission (TNERC) has proposed a new set of draft regulations, the Tamil Nadu Electricity Regulatory Commission (Grid Interactive Solar PV Energy Generating Systems) (GISS) Regulations, 2024.[1] These regulations are designed to replace the existing 2021 regulations and aim to create a more comprehensive framework for Grid Interactive Solar PV Energy Generating Systems (GISS) in Tamil Nadu. The TNERC is seeking comments on the draft regulations by July 15, 2024.

Explanation (Key Points)

The draft regulations cover a wide range of topics related to GISS, including definitions, scope, applicability, eligibility criteria, metering arrangements, billing processes, technical requirements, grid interconnection standards, and safety measures. Some of the key points of the draft regulations are:

  • Expanded Scope and Applicability: The regulations apply to a broader range of entities involved in GISS, including distribution licensees, government bodies, consumers, and generators. They cover both existing and new GISS, with or without battery energy storage systems.
  • Eligibility Criteria: The regulations define eligibility criteria for different mechanisms like net metering, group net metering, net billing/net feed-in, gross metering, and virtual net metering. These criteria are based on factors like consumer category, load, tariff, and voltage level.
  • Metering and Billing: Detailed metering arrangements and billing processes are outlined for each mechanism. For instance, net metering and net billing/net feed-in use bidirectional meters, while gross metering uses separate meters for generation and export. The regulations also specify how energy import, export, and net energy are calculated and billed under each mechanism.
  • Technical and Safety Requirements: The regulations set out technical requirements for GISS, including grid interconnection standards, safety measures, and equipment specifications. They emphasize the safe and reliable operation of GISS in parallel with the distribution network.
  • Network Charges: The regulations address network charges applicable to consumers, generators, and prosumers using the grid for their GISS. They also provide for exemptions and concessions in certain cases.
  • Additional Provisions: The draft regulations include provisions for energy accounting during meter defects, renewable purchase obligations, eligibility for renewable energy certificates, application procedures, and more. They also address issues like unauthorized use of GISS and termination of connection agreements.


The TNERC’s draft GISS Regulations, 2024, represent a significant step in promoting and regulating solar energy generation in Tamil Nadu. By providing a comprehensive and updated framework, the regulations aim to streamline the implementation of GISS, encourage wider adoption of solar energy, and ensure the safety and reliability of the grid. The TNERC’s initiative to seek stakeholder comments reflects a commitment to transparency and inclusivity in the regulatory process. The final regulations, once implemented, are expected to play a crucial role in shaping the future of solar energy in Tamil Nadu.