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CEA Issues Comprehensive Technical Standards for Solar, Wind, Floating Solar and Battery Storage Projects

The Central Electricity Authority (CEA) has notified the Technical Standards for Construction of Electrical Plants and Electric Lines (Amendment) Regulations, 2026, introducing an updated technical framework for the development of solar power plants, wind energy projects, floating solar installations and Battery Energy Storage Systems (BESS) across India. The new regulations will come into force on April 1, 2027, providing developers with a clear roadmap for designing, constructing and operating modern renewable energy infrastructure.

The amended regulations significantly expand the scope of the 2022 standards by incorporating dedicated technical requirements for emerging clean energy technologies and standalone battery storage facilities. The move is aimed at ensuring greater reliability, safety, interoperability and grid stability as India's renewable energy capacity continues to grow rapidly.

One of the key highlights of the notification is the introduction of standardized definitions and technical specifications for Battery Energy Storage Systems. The regulations cover battery containers, battery management systems (BMS), battery modules, battery racks, energy storage capacity, state of charge (SoC), state of health (SoH) and other essential components. Establishing common technical standards is expected to improve project consistency, enhance operational safety and facilitate large-scale deployment of energy storage solutions that can support renewable energy integration.

The CEA has also mandated that renewable energy projects and battery storage facilities be designed to operate within the voltage, frequency and power factor limits specified under India's grid connectivity standards. Developers will be required to maintain detailed engineering documentation, equipment specifications, manufacturer warranties, type-test certificates and plant modelling data throughout the operational life of each project, ensuring better compliance and long-term asset management.

To improve renewable energy forecasting and grid operations, all solar and wind projects with an installed capacity of 10 MW or above must install Automatic Weather Stations (AWS) that comply with World Meteorological Organization (WMO) standards. These systems will continuously record critical weather parameters such as solar irradiance, wind speed, temperature, humidity and atmospheric pressure, enabling more accurate power forecasting. In addition, projects must deploy Power Plant Controllers (PPCs) capable of receiving remote instructions from Load Dispatch Centres while regulating active and reactive power to strengthen grid stability.

The regulations further emphasize secure digital infrastructure by requiring redundant communication systems between generating stations and grid interconnection points. Protection-related communication networks must remain isolated from supervisory monitoring systems to improve cybersecurity and operational reliability. Developers will also be required to install SCADA systems, power quality meters, harmonic analyzers and event loggers to enable continuous monitoring of plant performance and power quality.

For ground-mounted solar power projects, the CEA has prescribed a minimum design life of 25 years. Developers must consider site-specific factors such as geological conditions, flood risks, climate, drainage and maintenance accessibility before construction begins. The regulations establish technical standards for photovoltaic modules, mounting structures, junction boxes, inverters, transformers, AC distribution systems, earthing arrangements, communication infrastructure and fire protection systems.

To improve durability and traceability, solar modules installed in coastal or highly corrosive environments must successfully pass salt mist corrosion tests. Every photovoltaic module must also include bypass diodes and RFID-based identification tags containing information such as the manufacturer, country of origin, electrical ratings and certification details. These measures are expected to improve quality assurance and simplify equipment lifecycle management.

The amended standards also introduce stringent performance requirements for solar inverters. These include a minimum efficiency of 98 percent, adjustable power factor operation between 0.9 leading and 0.9 lagging, compliance with IEC 61850 communication standards, automatic synchronization features, fault recording capabilities, data storage for at least 90 days and mandatory testing through accredited laboratories. Additionally, the total installed inverter capacity at a solar project must be equal to or greater than the plant's rated generation capacity.

Recognizing the rapid expansion of floating solar projects across reservoirs and water bodies, the CEA has issued a dedicated set of engineering standards for floating photovoltaic installations. Developers must conduct detailed assessments of wind conditions, water depth, seasonal water-level variations and bathymetric surveys before project execution. Floating platforms must be UV-resistant, recyclable, environmentally safe and designed to withstand prolonged exposure to harsh weather conditions, while solar panels must be installed at least 12 inches above the water surface.

The regulations also require comprehensive analysis of water quality, including pH levels, salinity, dissolved oxygen, turbidity and total dissolved solids, before selecting materials for floating structures, anchoring systems and electrical cables. Electrical equipment installed over water must meet high ingress protection standards, with junction boxes and connectors rated at IP67 or higher, while marine-grade cables must be used wherever prolonged water exposure is expected.

To enhance operational safety, floating solar projects must incorporate specialized anchoring and mooring systems capable of adapting to fluctuating water levels. The standards also mandate navigation lighting, cable identification systems, protection against wildlife and rodents, and alternative earthing arrangements where conventional shore-based grounding cannot be implemented.

For Battery Energy Storage Systems, the regulations establish detailed technical requirements covering battery management, power conversion systems, communication infrastructure, operational performance, protection systems and grid integration. BESS facilities will be required to comply with the same monitoring, communication and grid support standards applicable to renewable energy generating stations, enabling batteries to play a greater role in balancing renewable energy generation, improving grid flexibility and supporting peak demand management.

The notification represents another significant step in India's clean energy transition, as the country works toward expanding renewable energy capacity, strengthening grid resilience and integrating large-scale energy storage into the power system. By establishing uniform technical standards across solar, wind, floating solar and battery storage technologies, the CEA aims to improve project quality, enhance operational reliability and support the long-term modernization of India's electricity infrastructure.