MNRE issues guidelines under Solar Systems Goods Order 2025

The Ministry of New and Renewable Energy (MNRE) has issued new guidelines for testing and approval of storage batteries used in solar applications. The framework is part of the Solar Systems, Devices, and Component Goods Order 2025 and applies to lead-acid, lithium-ion, and nickel-based batteries.

The guidelines define a product family as a group of models sharing common design features, with testing and conformity requirements based on the maximum configuration. Testing methods and sample selection are aligned with IS 16270:2023 standards.

Lead-acid batteries must be manufactured using hard rubber and acid-resistant plastics. Nickel-cadmium and nickel-metal hydride types require alkali-resistant containers, while lithium-ion batteries must use casings and enclosures that comply with national or international safety standards.

Samples are to be randomly drawn from production batches for testing. Manufacturers must provide details such as container materials, separators, sealing, and dimensions. Vented lead-acid batteries are required to include level indicators and electrolyte markings.

Manufacturers must also supply charging instructions. In the absence of these, laboratories will use prescribed standards. Tests must consider environmental factors like temperature and humidity as per manufacturer specifications or standard conditions.

The guidelines specify the number of samples, testing sequence, and marking requirements for each battery type. Performance evaluations include capacity checks across ratings. Failures in short-term tests require retesting, while the highest-rated model in a series undergoes comprehensive testing on behalf of the family.

Safety provisions address risks of fire, explosion, chemical exposure, and electrical hazards. Batteries must be installed with proper insulation, undergo regular inspections, and follow prescribed maintenance. Additional measures include restricted access, isolation of parallel-connected units, and compliance with safe work procedures.

Manufacturers are required to provide detailed technical data on electrical properties, charging conditions, dimensions, weight, terminal types, and expected lifespan. They must also ensure proper disposal and recycling of used batteries in line with environmental responsibilities.

Compliance with these requirements is mandatory for product registration and market approval under the Solar Systems, Devices, and Component Goods Order 2025.

Access the full document here.