The Global Standards Certifications for BESS container based solutions is significant. As Battery Energy Storage Systems become critical to modern power infrastructure, compliance with international standards ensures safety, performance, and interoperability across components from cells to containerized systems.
Author: BIJAYA KUMAR MOHANTY
Here’s a breakdown of key standards at each level:
Cell / Module Level:
- IEC 62619 and IEC 63056 ensure safety and performance for industrial lithium-ion cells.
- UL 1642 and UN 38.3 verify safety and transport compliance of lithium cells.
- RoHS and REACH (NPS) ensure environmental and chemical safety.
- IEC 60529 governs ingress protection (IP rating) against dust and water.
- IEC 60730-1 applies for safety of electrical controls, often embedded in smart modules.
- IEC 60332-1-2 addresses flame retardancy for wires and components.
- UN 3480 ensures proper sea and road transport labelling and packaging.
- UL 9540A helps assess fire propagation behaviour of individual cells.
Cell & Pack/Module: BIS certification & CRS (Compulsory Registration Scheme) are mandatory and vendors must be certified under IS 16046 (Part 2):2018, which aligns with IEC 62133-2 for LFP. Additionally, compliance with emerging standards aligned to IEC 62619 and UL 1973 is recommended for enhanced safety and performance assurance.
Pack / Rack Level:
- IEC 62619, IEC 63056, and UL 1973 provide safety and performance compliance for energy storage packs and systems.
- IEC 62619 requires that control systems are subject to functional safety analysis. It isn’t prescriptive on the standard but suggests 61508 or ISO 13849 can be used.
- IEC 62485-5 focuses on installation safety in battery systems.
- IEC 61000-6-2, 61000-6-4, and 61000-4-36 ensure electromagnetic compatibility (EMC).
- IEC 62477-1 offers safety guidelines for power electronic converters in racks.
- RoHS, REACH, and UN 38.3 apply at this level as well.
- UL 9540A evaluates thermal runaway propagation between cells in modules/racks.
Cables used in BESS container must be LSZH with fire-resistant and flame-retardant sheaths, complying with key standards such as UL 9540A for completely system, UL 1973, UL 44/1277, UL 2664/2919, UL 4703, IEC 60502, IEC 60332-1/3, IEC 60754, IEC 61034, IEC 62821, and NFPA 70 is often mandatory, to ensure safety, performance, and regulatory compliance for indoor application.
Rack & Container: BIS certification is not yet mandatory at this level. It will be implemented soon. However, adherence to relevant international standards such as IEC 62933, IEC 62477, EMC, UL, UN, applicable fire safety codes (e.g., NFPA 855), and other other functional standards through certified components and integration validation strongly recommended.
Container / System Level:
- IEC 62933-2-1 and IEC TS 62933-5-1 / UL 9540 ensure complete system safety and performance.
- IEC 62040-1 covers general safety for uninterruptible power systems.
- NFPA 855, NFPA 69, and NFPA 68 provide fire protection, explosion prevention, and ventilation design standards.
- UN 1364 and UN 3536 regulate transport and hazard labelling for large systems.
- IEC 60529 (IP ratings) and IEC 62485-5 address protection and operational safety.
- UL 1973, UL 9540A, RoHS, and REACH also remain applicable.
Alignment with BIS-recognized testing laboratories is advisable, particularly for government or utility-scale deployments.
Compliance with these standards builds trust, ensures grid compatibility, and supports the global transition to sustainable energy.
- Each certification fee for both UL and IEC standards cost approximately $82,000 to $96,000
- C5 product level approx cost $700/container
- IP65 product level approx cost $200/container
Along with extra time period required minimum 4 to 6 months. Note that these costs are 2025 based and approximate, they will change with location.
Author: BIJAYA KUMAR MOHANTY
See also: GB/T 36276, Cross-Industry Functional Safety Comparison