IS 16270: India's BIS Standard for Battery Storage — Timeline and What Manufacturers Must Do

The Bureau of Indian Standards (BIS) has been steadily expanding its Quality Control Order (QCO) framework to cover battery technologies — a process that, when complete, will require all lithium battery products sold in India to carry BIS certification. For BESS manufacturers, importers, and project developers, understanding where this process currently stands, what IS 16270 actually requires, and what the enforcement timeline looks like is increasingly important for project planning and procurement.

This article provides a clear-eyed overview of the current state of BIS regulation for lithium batteries in India, including the specific testing requirements, the laboratory infrastructure available in India for testing, and practical guidance for manufacturers and importers.

The Indian Standards Framework for Lithium Batteries

India's standard for secondary lithium cells and batteries — IS 16270 — is aligned with IEC 62133 (the IEC standard for portable battery safety) with India-specific modifications. IS 16270 covers:

• IS 16270 Part 1: Lithium-ion batteries for portable applications (phones, laptops)
• IS 16270 Part 2: Cylindrical cells for portable applications
• IS 16270 Part 3: Prismatic and pouch cells (including large-format cells used in BESS)

For stationary energy storage applications — grid-scale and C&I BESS — the more directly relevant standard is IS 17893, which is India's adaptation of IEC 62619 (the IEC standard specifically for stationary applications of secondary lithium cells). IS 17893 covers the safety requirements for battery energy storage systems used for stationary applications including utility storage, telecommunications backup, and C&I UPS.

It is important to note: when BESS tenders in India (SECI, MSEDCL, GUVNL) specify "IEC 62619 certification", they are referring to the international standard. IS 17893 is the Indian national equivalent. Currently, Indian government tenders accept both IEC 62619 (from accredited international testing bodies) and IS 17893 (from BIS-empanelled Indian testing laboratories) as equivalent.

Current QCO Status: What Is Mandatory Now

BIS issues Quality Control Orders (QCOs) that make specified standards mandatory — meaning products covered by a QCO cannot be legally imported or sold in India without BIS certification. The QCO expansion for battery products has been phased:

Mandatory since January 2023: Lithium-ion batteries for portable applications (phones, laptops, power banks) — covered by IS 16270 Part 1 and Part 2. These QCOs are enforced; uncertified portable battery products face import restrictions.

Under notification (proposed QCO, pending enforcement): Lithium cells and batteries for electric vehicles — IS 16270 Part 3 and related standards. Enforcement is expected in 2025–2026.

Planned but not yet notified: Lithium batteries for stationary storage (IS 17893 / IEC 62619 equivalent). BIS has circulated consultation papers on extending QCO coverage to stationary storage, but as of mid-2026, no formal notification has been issued.

What IS 17893 / IEC 62619 Testing Requires

For manufacturers seeking certification under IS 17893 (the Indian equivalent of IEC 62619), the test protocol covers:

Electrical safety tests:

• Overcharge test (charge beyond manufacturer-specified voltage limit; cell must not fire, explode, or leak)
• Forced discharge test (discharge below minimum voltage; must not fire or explode)
• External short circuit test (terminal short circuit at 25°C and 55°C)
• Crush test (apply compressive force to cell; must not fire or explode)
• Drop test (from 1 m onto hardconcrete surface; must not fire, explode, or leak significantly)

Thermal tests:

• Thermal abuse test (cells subjected to 130°C external heating; must not fire or explode)
• Thermal cycling test (cells cycled between -20°C and +75°C, 10 cycles; must maintain capacity and not deform)
• Temperature test (discharge at -20°C, 20°C, 55°C; capacity at each temperature documented)

Mechanical tests:

• Vibration (sinusoidal, frequency sweep per IEC specification; capacity must not degrade more than 2%)
• Shock test (half-sine shock pulses in three axes)

Long-duration tests:

• Cycle life (number of cycles to 80% capacity retention — the most time-consuming test)
• Calendar life (accelerated ageing at elevated temperature to project 10+ year performance)

The total test duration for a new cell type seeking IEC 62619 / IS 17893 certification is typically 12–18 months, because the cycle life test cannot be accelerated — you must run the cells through the required number of cycles. Initial certification tests can be completed in 3–4 months for the safety and performance tests; cycle life data accumulates over the following 12 months.

Indian Testing Laboratory Infrastructure

A historical challenge for Indian BESS manufacturers has been the limited availability of accredited testing laboratories in India for lithium battery testing. Until recently, most IEC 62619 testing for India-market BESS was conducted at European or Chinese laboratories (TÜV Rheinland Germany, CNAS-accredited labs in China).

This is changing. BIS has empanelled several Indian laboratories for IS 17893 testing:

NABL-accredited Indian labs for lithium battery testing:

• National Test House (NTH), Kolkata and Mumbai — government lab, now accredited for IS 16270 testing
• CPRI (Central Power Research Institute), Bangalore — has developed BESS testing capability
• TIFAC laboratory network — coordinating industry access to battery testing
• Several private NABL-accredited labs in Pune, Hyderabad, and Surat that have added lithium battery testing to their scope

For Indian manufacturers, the key advantage of using Indian NABL labs is cost (30–50% lower than European labs) and logistics (no international shipping of cells). The limitation is that Indian lab capacity is still limited — booking cycles for cycle life tests require lead time of 4–6 months at present facilities.

What BIS Certification Means for Chinese Cell Importers

When the QCO for stationary lithium batteries is eventually notified, importers of Chinese LFP cells will need to ensure their cells carry BIS/IS 17893 certification. The implications:

For Tier 1 Chinese manufacturers (CATL, BYD): These manufacturers already hold IEC 62619 certification from European labs. Getting IS 17893 from a BIS-empanelled Indian lab is incremental — the core test data exists; it needs to be submitted to a BIS-empanelled lab and accepted by BIS. CATL and BYD have resources to manage this.

For Tier 2 Chinese manufacturers: May not hold existing IEC 62619 or may hold certifications from less stringent bodies. BIS certification will require full testing, which is a significant commitment of time and cost. Some Tier 2 manufacturers may exit the Indian market or reduce their India exposure rather than invest in BIS certification.

For distributors/traders of uncertified cells: The QCO, when notified, will directly affect Indian traders who import and resell cells without manufacturer-level certification. This is currently a significant portion of the Indian cell import market — traders who buy on spot markets and resell to small integrators. The QCO will require these traders to ensure every product they import has valid BIS certification from the manufacturer.

Practical Guidance: What to Do Now

If you are a BESS manufacturer in India: Initiate IS 17893 testing for your primary cell models now, using Indian NABL-accredited labs. The testing timeline (12–18 months for cycle life) means that waiting until the QCO is notified creates a compliance gap. Starting now puts you ahead of the mandatory curve.

If you are a developer procuring BESS: Request IEC 62619 or IS 17893 cell certificates as part of your technical bid evaluation. Do not accept unverified or self-declared certifications. As QCO enforcement approaches, uncertified BESS equipment will become un-installable in India regardless of cost advantage.

If you are a project finance lender: Start requiring IEC 62619 or IS 17893 certification as a condition of technical due diligence. Technology risk assessments for BESS projects without certified cells should flag this as a material risk.

SilicIndia Energies uses IEC 62619-certified cells from qualified manufacturers in all our BESS systems. Our certification documentation is available for developer technical bids, lender due diligence, and BIS compliance verification. As IS 17893 QCO enforcement approaches, we are coordinating with BIS-empanelled Indian laboratories to ensure our cell suppliers' products carry Indian national standard certification. Contact our team for certification documentation for your project.