What is BIS?
BIS, the Bureau of Indian Standards, is India's national standards body. Established under the BIS Act, it develops Indian Standards (IS), operates product certification schemes, conducts testing, and enforces quality compliance. BIS is to India what ANSI is to the United States or BSI to the United Kingdom: the recognised authority for setting product quality and safety standards.
For solar businesses, BIS is most relevant through its certification of solar modules (under IS 14286, which incorporates IEC 61215 qualification testing) and grid-tie inverters (under IS 16221, covering safety, anti-islanding, harmonics, and other grid behaviour). Both certifications are required for ALMM listing, which in turn is required for PM Surya Ghar and most government-procurement solar projects.
BIS certification involves testing at BIS-accredited laboratories. The National Institute of Solar Energy (NISE), several IIT labs, and private accredited facilities perform the actual testing. BIS reviews test results and issues certification. New product certifications typically take 6 to 12 months end to end.
Why BIS matters
For solar EPCs, BIS-certified equipment is the baseline requirement for subsidy-eligible installations. ALMM listings depend on BIS certification. Non-BIS equipment cannot be used in PM Surya Ghar, SECI auctions, or MNRE-funded projects.
For module and inverter manufacturers, BIS certification is the licence to sell into the Indian subsidy and government-procurement market. Manufacturers without BIS certification are effectively excluded from the largest portion of Indian solar demand.
For customers, BIS certification is the technical-quality assurance. The customer can verify that their installed equipment meets Indian Standards by checking BIS markings and certification.
For grid safety, BIS-certified inverters meet anti-islanding and harmonic requirements that protect the DISCOM grid and line workers. DISCOM commissioning inspections check BIS markings.
How BIS certification works
- Standard development. BIS technical committees develop Indian Standards.
- Standard publication. IS published with specifications and test methods.
- Manufacturer application. Manufacturer applies for BIS certification of a specific product.
- Sample testing. Product tested at BIS-accredited lab against the relevant IS.
- BIS review. Test results and manufacturer documentation reviewed.
- Certification issued. Certification with mark issued for the specific product model.
- Annual surveillance. Periodic factory and product surveillance.
- Renewal. Certification renewed periodically with refresh testing.
- Field enforcement. DISCOM, ALMM, and other authorities verify BIS markings.
Benefits of BIS certification
- Quality floor. Independent verification.
- ALMM eligibility. Required for subsidy projects.
- Customer confidence. Visible quality mark.
- Standardised testing. Same methodology across manufacturers.
- Field enforcement. DISCOM and inspector verification.
- International alignment. Indian Standards align with IEC where applicable.
Limitations
Certification timeline. 6 to 12 months for new products.
Cost. Testing and certification fees.
Standard revision lag. Indian Standards updated periodically; lag from international standard updates.
Lab capacity. BIS-accredited labs have finite throughput.
Field non-compliance. Some equipment in market may have outdated or false certification claims.
BIS in Indian solar
| Standard | Scope | Aligned with |
|---|---|---|
| IS 14286 | Crystalline silicon PV modules | IEC 61215 |
| IS 16221 | Grid-tie inverters (safety + grid behaviour) | IEC 62109, IEEE 1547 |
| IS 16270 | Lead-acid stationary batteries | n/a |
| IS 13779 | Energy meters | IEC 62052, IEC 62053 |
| Other | Charge controllers, cables, mounting hardware | n/a |
Quick facts
| Full form | Bureau of Indian Standards |
|---|---|
| Type | National standards body |
| Statutory basis | BIS Act |
| Scope | Standards development, certification, testing |
| Solar module standard | IS 14286 (aligned with IEC 61215) |
| Inverter standard | IS 16221 |
| Certification timeline | 6 to 12 months for new products |
| Required for | ALMM listing, PM Surya Ghar, SECI tenders, MNRE projects |
Common mistakes about BIS
- Treating BIS and ALMM as equivalent. BIS is product certification; ALMM is the approved manufacturer list.
- Buying non-BIS equipment for subsidy projects. Disqualifies subsidy.
- Assuming international certification suffices. Indian BIS certification needed for Indian market.
- Ignoring renewal cycles. Certifications need periodic renewal.
- Skipping verification of BIS mark on equipment. Counterfeit markings exist.
- Confusing BIS with NSEFI / ISMA. Different roles: BIS is standards body; others are industry associations.
- Underestimating certification timeline in product launch. Plan 6 to 12 months.
Key takeaways
- BIS is India's national standards body, established under the BIS Act.
- Develops Indian Standards, operates certifications, conducts testing.
- Solar module certification under IS 14286 (aligned with IEC 61215).
- Inverter certification under IS 16221.
- BIS-certified equipment is required for ALMM listing.
- ALMM is required for PM Surya Ghar, SECI auctions, and MNRE projects.
- Certification timeline typically 6 to 12 months.
Frequently Asked Questions
What is BIS?
BIS stands for Bureau of Indian Standards, the national standards body of India. BIS develops Indian Standards, operates certification schemes, and tests products against specifications. Solar modules and inverters require BIS certification for Indian market sale and for ALMM listing.
What does BIS certification mean for solar?
BIS certification confirms that a solar module or inverter meets the relevant Indian Standard. For modules, IS 14286 incorporates IEC 61215 qualification testing. For inverters, IS 16221 incorporates grid-tie behaviour, anti-islanding, and harmonic standards. BIS-certified equipment is what DISCOMs and ALMM accept.
Is BIS certification mandatory for solar?
Yes for ALMM listing. PM Surya Ghar, SECI tenders, MNRE-funded projects all require BIS-certified equipment. Private commercial rooftop without subsidy can use non-BIS equipment in principle but most EPCs default to BIS-certified for risk management.
Who issues BIS standards?
BIS develops and publishes Indian Standards through technical committees that include industry, academic, and government experts. Standards are referenced in regulations and used for certification testing.
What is IS 14286?
IS 14286 is the Indian Standard for terrestrial photovoltaic modules covering qualification testing aligned with IEC 61215. Module manufacturers seek BIS certification under this standard to confirm field reliability.
What is IS 16221?
IS 16221 is the Indian Standard for grid-tie inverters covering safety, anti-islanding, harmonics, and other grid-relevant behaviour. Inverter manufacturers seek BIS certification under this standard.
How long does BIS certification take?
Typically 6 to 12 months for new products, including testing at BIS-accredited labs and BIS's own review process. Renewals and modifications are typically faster.
Where are BIS tests conducted?
At BIS-accredited testing laboratories, including the National Institute of Solar Energy (NISE), several IIT laboratories, and private accredited labs. The testing covers the specific Indian Standard requirements.
Is BIS the same as ALMM?
No. BIS is the product certification (technical compliance with Indian Standards). ALMM is the MNRE-maintained list of approved manufacturers and models for subsidy-eligible projects. ALMM listing requires BIS certification as one of the conditions.
Do international manufacturers need Indian BIS certification?
For Indian market sale, yes. Foreign manufacturers seeking to sell in India go through Indian BIS certification process even if they hold international certifications. The Indian process verifies compliance with Indian Standards.
Does BIS handle other solar components?
Yes. Beyond modules and inverters, BIS standards cover solar charge controllers (relevant standards), batteries, mounting structures, and other solar-relevant equipment.
Can BIS certification be revoked?
Yes, if testing or field performance reveals non-compliance, or if manufacturer practices change. Revocation is rare but possible.
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- Bureau of Indian Standards. Official website and standards catalogue. bis.gov.in
- IS 14286 (Indian Standard for PV modules).
- IS 16221 (Indian Standard for grid-tie inverters).
- National Institute of Solar Energy (NISE). Module and inverter testing capabilities.
- BIS Quality Control Order. Mandatory certification scope notifications.
- MNRE notifications. ALMM listing referencing BIS certification.
- IEC standards aligned with Indian Standards. IEC 61215, IEC 62109, others.
Written by QuickEstimate Editorial, QuickEstimate Editorial (Surat).
Last updated: 4 June 2026.