Grid-connected solar inverters up to 100 kW require a mandatory BEE endorsement label from 1 January 2026, confirming compliance with minimum efficiency performance standards tested under IS 17980:2022 / IEC 62891:2020. Efficiency thresholds rise with inverter capacity and are based on a combination of steady-state conversion efficiency and static MPPT efficiency, rather than a single peak number. Before BEE labelling can be granted, the inverter must already hold valid BIS certification under IS 16221-2:2015 — making solar inverter compliance a two-stage process. Both Indian manufacturers and importers of qualifying inverters fall within this requirement, and inverter models without valid registration cannot legally be supplied into new grid-connected projects.
Solar inverters sit at the center of every grid-connected PV installation — converting the DC output of panels into usable AC power. As India pushes harder on its renewable energy targets, the efficiency of that conversion step has moved from a nice-to-have specification to a regulated, mandatory requirement.
From 1 January 2026, grid-connected solar inverters up to 100 kW must meet minimum efficiency performance standards set by the Bureau of Energy Efficiency (BEE) and carry the BEE endorsement label. This guide covers what that requirement actually involves, how it interacts with existing BIS certification obligations, and the practical steps to get a solar inverter model registered.
📑 Quick Navigation
- Why BEE Certification Is Now Mandatory for Solar Inverters
- How the BEE Endorsement Label Works
- The BIS IS 16221-2:2015 Prerequisite
- Solar Inverter BEE Certification — Key Facts
- Where Solar Inverter BEE Labels Matter
- BEE Registration Process for Solar Inverters
- Document Checklist
- Indian Manufacturer vs. Importer Route
- What Happens Without a Valid BEE Label
- How Rego Services Supports Your Certification
- Frequently Asked Questions
Why BEE Certification Is Now Mandatory for Solar Inverters
Inverter efficiency has a direct, compounding effect on the actual energy yield of a solar installation over its lifetime — a few percentage points of conversion loss, multiplied across thousands of installations, adds up to a meaningful drag on India's renewable energy output. That's the underlying reason BEE moved solar inverters from a voluntary labelling programme to a mandatory one.
From 1 January 2026, single-phase (230V AC, 50Hz) and three-phase (up to 415V AC, 50Hz) non-storage, grid-connected solar inverters up to 100 kW must meet BEE's minimum efficiency performance standards and carry the endorsement label to be legally manufactured, imported, or sold in India.
Inverter efficiency directly affects how much usable electricity a solar installation actually delivers — a regulatory floor here has real downstream impact.
A valid BEE endorsement label, on top of BIS certification, is now a precondition for selling grid-connected inverters into the Indian market.
EPCs and installers are expected to verify BEE labelling before deploying inverters into new grid-connected projects, pushing compliance down the supply chain.
Mandating a minimum conversion efficiency across the installed base supports India's broader renewable energy capacity and efficiency goals.
How the BEE Endorsement Label Works
Unlike appliance star ratings, solar inverters aren't rated on a sliding scale — the BEE label for inverters is an endorsement confirming the product meets a minimum efficiency floor set for its capacity band.
The minimum efficiency requirement scales upward as inverter capacity increases, reflecting the different conversion challenges at different power levels.
The efficiency figure combines steady-state conversion efficiency with static MPPT (Maximum Power Point Tracking) efficiency, reflecting real operating performance.
Efficiency is verified at an accredited laboratory under IS 17980:2022 or IEC 62891:2020, the Indian and international standards governing PV inverter efficiency testing.
The BEE label carries the model number, rated output power, and verified efficiency figure — allowing buyers and project developers to check compliance at a glance.
The BIS IS 16221-2:2015 Prerequisite
One detail that catches manufacturers off guard: BEE labelling isn't a standalone certification for solar inverters. A valid BIS certificate under IS 16221-2:2015 is a prerequisite condition — inverters must already hold this certification before BEE efficiency testing and labelling can proceed.
In practice, this makes solar inverter compliance a two-layer project: BIS certification first, establishing baseline product safety, followed by BEE efficiency testing and endorsement labelling. Manufacturers planning a new inverter launch should sequence these two workstreams together rather than treating BEE as an afterthought once BIS is complete.
Solar Inverter BEE Certification — Key Facts
| Attribute | Detail |
|---|---|
| Product | Grid-connected solar (PV) inverters |
| Issuing authority | Bureau of Energy Efficiency (BEE), Ministry of Power |
| Legal basis | Energy Conservation Act, 2001 |
| Applicable standard(s) | IS 17980:2022 / IEC 62891:2020 (efficiency) |
| BIS prerequisite | IS 16221-2:2015 |
| Status | Mandatory from 1 January 2026 for grid-connected inverters up to 100 kW |
| Applicant | Manufacturer (Indian) or Importer (for imported inverters) |
| Registration levels | Brand/company registration + model-wise registration |
| Scope | Single-phase 230V & three-phase up to 415V, 50Hz, non-storage, grid-connected, up to 100 kW |
Where Solar Inverter BEE Labels Matter
Residential and commercial rooftop PV installations using single-phase or small three-phase grid-connected inverters.
Factories, offices, and larger commercial sites deploying three-phase inverters within the mandatory capacity range.
Grid-connected utility projects built from multiple qualifying inverter units within the mandatory scope.
Both Indian OEMs and companies importing inverters — commonly sourced from overseas manufacturing hubs — fall within scope.
BEE Registration Process for Solar Inverters
Determine whether your inverter model falls within the mandatory BEE efficiency scope and confirm the status of its BIS prerequisite certification.
Ensure the inverter holds valid BIS certification under IS 16221-2:2015 before proceeding to BEE efficiency testing.
Submit representative samples to a NABL/BEE-approved laboratory for efficiency testing under IS 17980:2022 or IEC 62891:2020.
Complete company/brand registration, followed by model-specific registration with the efficiency test report and supporting documents.
Once approved, generate the compliant label carrying model number, rated output, and verified efficiency, and affix it to the product before dispatch.
Document Checklist for BEE Certification
- Company incorporation / registration documents — Legal proof of the applicant's business registration.
- GST and PAN details — Standard tax registration documentation for Indian applicants.
- Brand / trademark certificate — Confirming rights to the brand under which the inverter is sold.
- Authorised signatory letter — Naming the individual authorised to submit and sign the application.
- Valid BIS certificate under IS 16221-2:2015 — The mandatory prerequisite before BEE labelling can be granted.
- ISO 9001 certificate — Where available, supporting evidence of the manufacturing unit's quality management system.
- Efficiency test report — From a NABL/BEE-approved laboratory, confirming efficiency compliance for the specific model.
- Model technical specifications — Detailed specifications for each inverter model being registered.
- Sample label specimen and product images — Supporting the label generation and verification process.
- Import and authorisation documents — For importers, additional paperwork confirming the import relationship and authorisation to sell the product in India.
BIS FMCS Certification for Foreign Manufacturers
Importing solar inverters manufactured outside India? See our guide to BIS FMCS certification for how foreign manufacturers obtain the underlying BIS approval that BEE labelling depends on.
Indian Manufacturer vs. Importer Route
The core BEE registration steps — testing, brand registration, model registration, labelling — apply to both Indian manufacturers and importers of qualifying solar inverters. The difference lies mainly in who holds the registration and what supporting paperwork is needed.
- Registration held directly by the Indian manufacturer
- BIS prerequisite completed for the domestic manufacturing site
- Efficiency testing conducted on domestically produced samples
- Standard brand and model registration on the BEE portal
- Registration held in the name of the Indian importer
- BIS prerequisite completed for the overseas manufacturing site
- Efficiency testing conducted on imported representative samples
- Additional import and authorisation documentation required
What Happens Without a Valid BEE Label
Unregistered inverter models cannot legally be supplied into new grid-connected projects once the mandatory regime is in force.
Previously registered models can be deactivated if continuation or renewal requirements under the mandatory regime aren't met on time.
EPCs and installers verifying compliance before procurement will simply decline to use inverter models without a valid label and certificate.
Selling regulated products without the required efficiency label carries penalties under the governing energy conservation framework.
How Rego Services Supports Your BEE Certification
Rego Services Private Limited manages the complete BEE certification journey for solar inverter manufacturers and importers — sequencing the BIS prerequisite alongside efficiency testing and labelling, so nothing falls through the cracks between the two schemes.
- Applicability and scope assessment — We confirm whether your inverter model falls within the mandatory BEE efficiency compliance regime and check current BIS prerequisite status.
- BIS and BEE sequencing — We coordinate both certification layers together, so BIS approval and BEE labelling proceed on a realistic combined timeline.
- Laboratory testing coordination — We manage sample submission and efficiency testing with NABL/BEE-approved laboratories.
- Documentation and portal registration — We prepare the complete document set and handle brand and model registration on the BEE portal.
- Importer-route support — For inverters sourced from overseas manufacturers, we structure the importer-route registration end-to-end.
- Ongoing renewal management — We track continuation and renewal deadlines so your registered models stay active without disruption.
Frequently Asked Questions
Is BEE certification mandatory for solar inverters?
Yes — from 1 January 2026, grid-connected solar inverters up to 100 kW must meet BEE's minimum efficiency performance standards and carry the endorsement label to be manufactured, imported, or sold in India.
What efficiency must a solar inverter meet for BEE?
The minimum efficiency threshold rises with inverter capacity and is based on a combination of steady-state conversion efficiency and static MPPT efficiency, tested under IS 17980:2022 or IEC 62891:2020.
Do solar inverters need BIS certification as well as BEE?
Yes. Inverters must hold valid BIS certification under IS 16221-2:2015 as a prerequisite before BEE endorsement labelling can be granted — making solar inverter compliance a two-layer project.
Can imported solar inverters get a BEE label?
Yes. Imported grid-connected inverters can be registered under BEE in the name of the Indian importer, following completion of the BIS prerequisite and efficiency testing.
What happens if an inverter model isn't registered?
Unregistered models cannot legally be supplied into new grid-connected projects, and previously registered models risk deactivation if continuation requirements aren't met on schedule.
✓ Key Takeaways
- Grid-connected solar inverters up to 100 kW require a mandatory BEE endorsement label from 1 January 2026
- Efficiency is tested under IS 17980:2022 / IEC 62891:2020 and rises with inverter capacity
- BIS certification under IS 16221-2:2015 is a mandatory prerequisite before BEE labelling
- Registration applies at both brand/company level and individual model level
- Both Indian manufacturers and importers fall within scope
- Models without valid registration cannot be supplied into new grid-connected projects
- Rego Services provides end-to-end support — sequencing BIS and BEE, testing coordination, documentation, and renewal tracking
Your Next Step
BEE certification for solar inverters is a well-defined but two-layer process, and getting the BIS prerequisite and efficiency testing sequenced correctly from the start saves real time. With the right regulatory partner managing both layers together, reaching full compliance is straightforward.
Rego Services' regulatory team brings the expertise to manage your complete solar inverter compliance journey — from BIS certification through BEE efficiency testing and labelling — so your products reach the Indian market on schedule.
Contact Rego Services today to begin your BEE certification for solar inverters and keep your products compliant for the Indian market.