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BEE Issues February 28 Cut-Off for Continued Registration of Solar Inverters Under Mandatory Labelling
Jan 14, 2026
The Bureau of Energy Efficiency (BEE) has notified manufacturers of grid-connected solar inverters that continuation of registration under the mandatory Standards and Labelling (S&L) programme, effective from January 1, 2026, will require fresh submissions by February 28, 2026. Failure to comply will result in the automatic deactivation of existing registered models.
According to the advisory, manufacturers seeking to retain approval for already registered inverter models must upload the earlier approval letter, a sample endorsement label reflecting the revised validity period, and a duly completed proforma confirming intent to continue registration on the BEE portal. The window for submitting continuation applications will open on January 6, 2026, at 11:30 hours, and no requests will be accepted after the February 28 deadline.
BEE clarified that currently registered inverter models will remain valid only until the cut-off date. Any model for which continuation documentation is not submitted within the stipulated timeline will be deactivated automatically, with no provision for late applications.
The advisory follows a notification issued by the Ministry of Power in November 2025, which prescribed minimum overall efficiency standards for grid-connected solar inverters up to 100 kW manufactured in or imported into India. These norms, finalised in consultation with BEE, will apply from January 1, 2026, through December 31, 2027.
Under the revised framework, all single-phase (230 V AC, 50 Hz) and three-phase (up to 415 V AC, 50 Hz) non-storage, grid-connected solar inverters must comply with minimum efficiency benchmarks based on rated output capacity. The standards are aligned with IS 17980:2022 and IEC 62891:2020 testing methodologies.
The minimum overall efficiency thresholds have been defined as 92% for inverters below 1 kW, 93% for 1–3 kW, 95% for 3–5 kW, 96% for 5–10 kW, 97% for 10–20 kW, and 98% for inverters above 20 kW. BEE has specified that no negative tolerance will be allowed, requiring every tested unit to meet or exceed the mandated efficiency levels, accounting for manufacturing variations.
In addition, compliance with Bureau of Indian Standards (BIS) requirements and testing under IS 17980:2022 has been made mandatory for participation in the labelling programme. The endorsement labels will categorise inverter efficiency based on static MPPT efficiency and steady-state conversion efficiency, with testing to be conducted by laboratories accredited by NABL, ILAC, APLAC, or NISE.