Author: PPD Team Date: 13/06/2025
The Ministry of New and Renewable Energy (MNRE) has introduced new rules to guide the installation and testing of prototype wind turbines. The guidelines allow limited grid access to test turbines while enforcing clear safety, certification, and maintenance requirements. The goal is to support innovation in wind technology without compromising reliability.
Issued on June 12, 2025, these rules replace earlier frameworks from 2012 and 2016.
The new framework, rolled out by MNRE’s Wind Energy Division, enables manufacturers to test their wind turbines in real-world conditions. A maximum of three prototype turbines per model can be connected to the Indian grid. However, these turbines cannot be sold or mass-produced until certified and listed under the Revised List of Models and Manufacturers (RLMM).
All testing activities must be coordinated through the National Institute of Wind Energy (NIWE), Chennai. Manufacturers must submit detailed applications, including prototype certificates and contracts with internationally accredited testing bodies. These bodies are required to comply with standards such as IECRE OD 501 and IS/IEC 61400-22:2010.
Each prototype certificate is valid for three years. Extensions are allowed if manufacturers meet specific conditions. The framework allows design changes during the testing phase, provided that updated certificates and change logs are submitted to NIWE. This clause supports iterative innovation while maintaining oversight.
Timelines are clearly defined. After receiving NIWE’s approval, manufacturers have 18 months to commission prototypes and three years to obtain a type certificate. If the prototype certificate is revised, the testing window extends to four years. Non-compliance with deadlines leads to disconnection and removal of the turbines at the manufacturer’s cost.
The guidelines also make it mandatory for manufacturers to maintain turbines and file annual maintenance reports via certification agencies. Poor maintenance can result in grid disconnection.
To reduce costs, imported components for prototypes are exempted from customs and excise duties. However, all parts must be new. Modifications to existing prototypes are permitted under regulated conditions.
To ensure legal and operational accountability, manufacturers must submit affidavits and indemnity bonds to both NIWE and the relevant state utilities. Failure to follow the rules can lead to unilateral cancellation of permits, ensuring grid safety and compliance.