BIS Certification for Solar Inverters in India

BIS Certification for Solar Inverters in India is an important product compliance requirement for manufacturers, importers, solar equipment brands, EPC companies, renewable energy businesses, and foreign manufacturers supplying applicable photovoltaic inverters in the Indian market.

Solar inverters are critical components of a photovoltaic system because they convert DC electricity generated by solar modules into usable AC electricity. Their electrical safety, protection systems, grid interaction, and performance must therefore comply with the applicable Indian Standards.

Solar photovoltaic products are covered under the **BIS Compulsory Registration Scheme **(CRS / Scheme II) notified by the Ministry of New and Renewable Energy (MNRE). BIS currently lists power converters for photovoltaic systems and utility-interconnected photovoltaic inverters among solar products covered under compulsory registration.

A BIS Solar Inverter Certification Consultant can help businesses identify the applicable Indian Standard, review product specifications, coordinate BIS-recognised laboratory testing, prepare documentation, submit the CRS application, respond to queries, and obtain registration before commercial supply in India.

What is BIS Certification for Solar Inverters?

BIS Certification confirms that an applicable solar inverter model has been tested against the relevant Indian Standard and registered under the prescribed BIS certification framework.

For solar photovoltaic inverters, important standards listed by BIS include:

IS 16221 (Part 2):2015 — Safety of Power Converters for Use in Photovoltaic Power Systems, Part 2 — Particular Requirements for Inverters.

BIS also lists standards relating to utility-interconnected photovoltaic inverter requirements and islanding prevention measures under its solar photovoltaic compulsory registration category.

The exact standard combination should be confirmed according to the inverter’s capacity, configuration, grid connectivity, and current MNRE/BIS notification.

Who Needs BIS Certification for Solar Inverters?

BIS compliance may need to be assessed by:

• Solar inverter manufacturers
• Solar inverter importers
• Indian solar brands
• Foreign manufacturers
• Solar EPC companies
• Renewable energy equipment suppliers
• OEM manufacturers
• Solar project developers
• Distributors
• Companies launching new inverter models in India

The certification is generally linked to the manufacturer, manufacturing location, product category, and applicable model series.

Types of Solar Inverters

Different solar projects use different inverter technologies.

Common categories include:

• String inverters
• Central inverters
• Grid-connected solar inverters
• Hybrid solar inverters
• Microinverters
• Single-phase solar inverters
• Three-phase solar inverters
• Residential solar inverters
• Commercial solar inverters
• Utility-scale solar inverters

The regulatory pathway should be checked according to the exact technical characteristics of the inverter.

Why BIS Certification is Important for Solar Inverters

Solar inverters operate with high electrical voltages and are connected to PV arrays, batteries in certain systems, electrical installations, and sometimes the public electricity grid.

Compliance testing helps evaluate areas such as:

• Electrical safety
• Protection against electric shock
• Mechanical hazards
• Fire hazards
• Environmental conditions
• Insulation
• Equipment construction
• Marking and documentation
• Protection systems
• Grid-interaction characteristics, where applicable

BIS certification also helps manufacturers demonstrate that the product has been tested against the prescribed Indian requirements before entering the regulated Indian market.

BIS Standard for Solar Inverters

One of the principal standards applicable to photovoltaic inverters is:

IS 16221 (Part 2):2015

Title: Safety of Power Converters for Use in Photovoltaic Power Systems — Part 2: Particular Requirements for Inverters.

BIS laboratories currently maintain testing facilities against this standard for photovoltaic power converters.

Depending on the inverter type, additional standards or testing requirements may apply.

For example, utility-interconnected photovoltaic inverters may also need compliance assessment relating to islanding prevention and grid-connected operation.

Therefore, the correct approach is:

Product Specification → Inverter Type → Capacity → Grid Configuration → Applicable Indian Standard → Testing → BIS Registration

BIS CRS for Solar Inverters

Solar photovoltaic products are included under BIS Scheme II — Registration Scheme, commonly referred to as CRS.

Unlike a conventional ISI Mark licensing process, CRS relies heavily on product testing and registration of the manufacturer and product model.

The broad process involves:

Product Assessment → BIS Lab Testing → Test Report → CRS Application → BIS Review → Registration

The manufacturer should obtain the registration before placing the applicable product into the Indian market where compulsory certification applies.

Step 1: Check BIS Applicability

The first step is reviewing the inverter specifications.

Important details include:

• Product name
• Model number
• Rated capacity
• Input voltage
• Output voltage
• Single-phase or three-phase
• Grid-connected or standalone
• Hybrid functionality
• Number of MPPT inputs
• Manufacturer
• Manufacturing location

The consultant then identifies the applicable standard and certification route.

Step 2: Review Product Construction

Before submitting the inverter for laboratory testing, the manufacturer should review its construction against the applicable Indian Standard.

This may include:

• Enclosure
• Electrical components
• PCB
• Wiring
• Protection devices
• Connectors
• Insulation
• Earthing
• Cooling system
• Internal spacing
• Labels and markings

Finding technical gaps before testing can reduce the risk of test failure.

Step 3: Prepare Technical Documentation

Documents may include:

• Product datasheet
• User manual
• Circuit information
• PCB details
• Component information
• Product photographs
• Rating label
• Model details
• Manufacturing details
• Technical specifications
• Critical component list

The documents should correspond exactly with the sample submitted for testing.

Step 4: Submit Sample for BIS Laboratory Testing

The applicable inverter sample is submitted to a BIS-recognised laboratory capable of testing the relevant Indian Standard.

Testing can cover areas such as:

• Electrical hazards
• Mechanical safety
• Fire safety
• Environmental requirements
• Protection against liquids
• Equipment construction
• Marking and documentation
• Inverter-specific safety requirements

Testing complexity and time can vary significantly depending on inverter capacity and design.

Step 5: Obtain BIS Test Report

After successful testing, the laboratory issues the applicable test report.

The report should be carefully checked for consistency in:

Brand → Model → Manufacturer → Factory Address → Rating → Technical Specification

An incorrect model or manufacturing address can create problems during registration.

Step 6: Prepare BIS CRS Application

After obtaining the valid laboratory test report, the manufacturer prepares the BIS registration application.

Supporting documents may include:

• Test report
• Business licence
• Manufacturing address proof
• Trademark documents
• Brand authorisation, where applicable
• Product photographs
• Rating label
• Authorised signatory documents
• Technical documents
• Other declarations required by BIS

The exact documentation depends on whether the applicant is an Indian or foreign manufacturer.

Step 7: BIS Review and Query Response

BIS reviews the application and supporting documentation.

Queries can relate to:

• Product model
• Test report
• Manufacturing address
• Brand ownership
• Technical specifications
• Product label
• Application details

Queries should be answered carefully because inconsistencies may delay registration.

Step 8: Grant of BIS Registration

After satisfactory review, BIS may grant registration for the applicable product and manufacturing facility.

The manufacturer can then use the BIS registration details according to the applicable marking requirements.

BIS Certification for Foreign Solar Inverter Manufacturers

Foreign manufacturers supplying solar inverters to India can also apply for BIS registration.

The manufacturer may need to appoint an Authorized Indian Representative (AIR) to coordinate the certification process in India.

The process may involve:

• Manufacturer documentation
• Factory details
• AIR documentation
• Brand information
• Product testing
• BIS application
• Regulatory query response

Importers should not assume that international certifications such as IEC, CE, TUV, UL, or other overseas approvals automatically replace mandatory BIS requirements in India.

Documents Required for BIS Solar Inverter Certification

Common documents may include:

• Company registration documents
• Factory details
• Manufacturing address
• Product datasheet
• Model list
• Circuit or technical information
• Product photographs
• Rating label
• User manual
• Test report
• Trademark certificate or authorisation
• Authorised signatory details
• AIR documents for foreign manufacturers
• Undertakings and declarations
• Other BIS-required documents

Document requirements should be checked according to the latest BIS application process.

Solar Inverter Model Series and BIS Registration

Manufacturers often produce several inverter models with different:

• Power ratings
• Input voltages
• Output ratings
• MPPT configurations
• Enclosures
• Components
• PCB designs

It should not be assumed that one test report automatically covers every inverter model.

Model grouping should be evaluated before laboratory testing.

A proper grouping strategy can help prevent unnecessary repeat testing while ensuring that technically different models are not incorrectly included under the same registration.

BIS Certification for Imported Solar Inverters

Importers should verify BIS compliance before placing large purchase orders or dispatching goods to India.

Before shipment, check:

• Exact manufacturer
• Factory location
• Product model
• Capacity
• Applicable Indian Standard
• BIS registration details
• Registration validity
• Brand
• Product label

A BIS certificate belonging to another manufacturer or factory should not automatically be assumed to cover the imported product.

BIS Certification and Customs Clearance

For products subject to compulsory BIS requirements, Customs may verify product compliance during import.

Possible issues can arise when:

• BIS registration is unavailable
• Model does not match
• Factory address differs
• Brand information differs
• Registration has expired
• Product marking is incorrect
• Imported product differs from tested configuration

Completing BIS compliance before shipment can reduce the risk of clearance delays.

Solar Inverter BIS Certification and MNRE Requirements

Solar inverter compliance is closely connected with standards and quality-control requirements notified by the Ministry of New and Renewable Energy.

MNRE continues to issue implementation notifications relating to the Solar Systems, Devices and Components Goods Order, 2025, so manufacturers and importers should verify the current applicability for their inverter category and capacity before testing or import.

This is particularly important where regulatory treatment differs according to inverter capacity or product configuration.

BIS Certification vs BEE Registration for Solar Inverters

BIS and BEE requirements should not be confused.

BIS Certification focuses on compliance with applicable Indian product and safety standards.

BEE Standards & Labelling focuses primarily on energy efficiency for products covered by the BEE programme.

Solar inverter manufacturers should separately check whether BEE requirements apply to their product category at the time of market launch.

One approval does not automatically replace another.

Common Mistakes in BIS Solar Inverter Certification

Common problems include:

• Selecting the wrong Indian Standard
• Testing before checking model grouping
• Wrong product model on the report
• Manufacturer name mismatch
• Factory address mismatch
• Product label errors
• Technical documents not matching the sample
• Testing an engineering sample different from production units
• Assuming IEC certification replaces BIS
• Importing before obtaining applicable registration
• Using another factory’s BIS registration
• Changing critical components without compliance review

A pre-testing technical review can reduce many of these risks.

How Long Does BIS Certification Take?

The certification timeline depends on:

• Product complexity
• Laboratory availability
• Testing duration
• Sample performance
• Documentation
• BIS application review
• Regulatory queries

Solar inverter testing can be more technically intensive than testing many smaller electronic products.

Therefore, manufacturers planning a product launch should start the BIS process well before their intended import or commercial-sale date.

Cost of BIS Certification for Solar Inverters

The total cost depends on:

• Applicable Indian Standard
• Inverter capacity
• Number of models
• Testing requirements
• Laboratory charges
• Government fees
• Documentation
• Foreign manufacturer requirements
• Retesting, if required

BIS LIMS shows that laboratory testing charges can vary significantly between recognised laboratories and according to the test scope.

A product-specific quotation should therefore be obtained after reviewing the inverter specifications.

Benefits of Hiring a BIS Solar Inverter Certification Consultant

Professional consulting can help businesses with:

• BIS applicability assessment
• Indian Standard identification
• Model grouping
• Technical documentation
• Lab coordination
• Product testing support
• CRS application
• Trademark documentation
• AIR support
• Foreign manufacturer coordination
• BIS query response
• Registration support
• Product addition
• Renewal support
• Import compliance review

This can be particularly useful for manufacturers launching multiple solar inverter models in India.

Why Choose Green Permits for BIS Certification for Solar Inverters?

Green Permits Consulting supports manufacturers, importers, foreign brands, solar companies, and renewable energy businesses with BIS and product regulatory compliance in India.

Green Permits can assist with:

• BIS Certification for Solar Inverters
• BIS CRS Registration
• Indian Standard Identification
• Product Testing Coordination
• Model Grouping
• Technical Documentation
• BIS Application Filing
• Authorized Indian Representative Support
• BIS Query Response
• Foreign Manufacturer Compliance
• Product Addition
• Renewal Support
• Import Compliance Advisory

The objective is to coordinate product assessment, laboratory testing, documentation, BIS filing, and market-entry compliance through one structured process.

Learn More About BIS Certification for Solar Inverters in India

If you manufacture or import solar inverters in India, checking the correct Indian Standard, product capacity, model grouping, laboratory testing requirements, and BIS certification pathway before shipment can help avoid repeat testing, customs issues, and market-launch delays.

Read more about BIS certification and product compliance services here:

👉 https://www.greenpermits.in/08/bis-certification-for-solar-inverters-in-india-guide/

📞 Get Expert Assistance for BIS Solar Inverter Certification

If you need help with BIS Certification for Solar Inverters in India, CRS registration, laboratory testing, model grouping, AIR appointment, foreign manufacturer certification, or BIS application filing, Green Permits Consulting can assist you.

🌐 Website: www.greenpermits.in

📞 Phone: +91 78350 06182

📧 Email: wecare@greenpermits.in

Book a consultation with Green Permits Consulting for BIS Solar Inverter Certification and product compliance support in India.