Full Text
REGD. No. D. L.-33004/99
The Gazette of India
CG-DL-E-13112025-267614
EXTRAORDINARY
PART II-Section 3-Sub-section (ii)
PUBLISHED BY AUTHORITY
No. 4972]
NEW DELHI, WEDNESDAY, NOVEMBER 12, 2025/KARTIKA 21, 1947
[F. No. 10/4/2024-EC]
DHIRAJ KUMAR SRIVASTAVA, Chief Engineer
MINISTRY OF POWER
NOTIFICATION
New Delhi, the 12th November, 2025
S.O. 5127(E).— In exercise of the powers conferred by clause (a) of section 14 of the Energy
Conservation Act, 2001 (52 of 2001), the Central Government in consultation with the Bureau of Energy
Efficiency hereby specifies the following energy consumption standards having an output voltage of 230
V ac, 50 Hz for single phase and up to and including 415 V ac 50 Hz for three phases Grid Connected Solar
Inverter having rated capacity up to and including 100 kW, being manufactured or imported in India
shall,-
(1) meet the minimum overall efficiency requirement of the inverter based on static maximum power
point tracking efficiency measurement and the steady state conversion efficiency prescribed in IS
17980:2022/ IEC 62891:2020;
(2) display an endorsement label based on the overall efficiency matrix on Grid Connected Solar Inverter.
2. Definitions. —In this notification, unless the context otherwise requires, -
(a) "Conversion Efficiency" means the ratio of the energy delivered by the device under test at the AC
terminal within a defined measuring period to the energy accepted by the device under test at the DC
terminal;
(b) "Grid-connected inverter” means inverter that is able to operate in parallel with the distribution or
transmission system of an electrical utility;
(c) 'Inverter” means electric energy converter that changes direct electric current to single-phase or
polyphase alternating currents;
(d) “MPPT Efficiency” means the Ratio of the energy drawn by the device under test within a defined
measuring period to the energy provided theoretically by the PV simulator at the maximum power
point (MPP);
(e) "Overall Efficiency" means the ratio of the energy delivered by the device under test at the AC
terminals within a defined measuring period to the energy provided theoretically by the PV simulator.
The overall efficiency (n.) can also be considered as:
nt = ηconv x ηMPPTstat = PAC / PMPP,PVS
Where;
nt: Overall Efficiency
ηconv: Conversion Efficiency
ηMPPTstat: Static MPP Efficiency
PAC: measured AC Output Power to the device under test
PMPP,PVS: MPP Power Provided by PV Simulator;
(f) “Rated Output Power” means the active power the inverter can deliver in continuous operation.
3. Minimum Overall Efficiency Requirement.—(1) To qualify for award of endorsement label, the
grid connected solar inverter shall meet the minimum overall efficiency requirement as specified in the
following table, namely:
Table -1
(Valid from 1st January 2026 to 31st December, 2027)
Minimum Overall Efficiency Requirement for Grid Connected
Sl.No. | Solar
| | Inverter
| | Rated Output Power (kW) | Minimum Overall
| | | Efficiency(%)
|---|-------------------------|-------------------|
| 1. | Rated Output Power < 1 | 92 |
| 2. | 1≤ Rated Output Power < 3 | 93 |
| 3. | 3≤ Rated Output Power < 5 | 95 |
| 4. | 5≤ Rated Output Power < 10 | 96 |
| 5. | 10≤ Rated Output Power < 20 | 97 |
| 6. | Rated Output Power > 20 | 98 |
(2) There shall be no negative tolerance in the minimum overall efficiency requirement criteria
for obtaining the BEE endorsement label.
(3) All tested products shall meet the minimum threshold including manufacturing tolerance and
other variations.
4. Testing methods. For the purpose of determining the endorsement label of a grid connected
solar inverter, the test standards specified in the table below shall be used, namely: —
Table - 2 (Testing Standards)
Sl. No. | Nature of Test | Test Standards and Clause
| | | References
|---|------------------------------------------|-------------------------------|
| 1 | Overall efficiency at Standard Test Conditions (STC) | Clause 4 and 5 of IS 17980:2022/
| | | IEC 62891:2020 |
5. Prequalification criteria. The grid connected solar inverter shall meet the following
requirements to participate in BEE labelling programme namely:—
(a) overall efficiency as specified in Table-1;
(b) only Bureau of Indian Standards compliant solar inverters are eligible to take part in the BEE
Standards and labelling programme ; and
(c) every grid connected solar inverter shall be tested in accordance with the latest version of Indian
Standard IS 17980:2022.
6. Test report. – The result of testing of each unit grid connected solar inverter shall be reported in
the format at the Annexure appended to this notification and the manufacturer shall submit test report
from a lab accredited by the National Accreditation Board for Testing and Calibration Laboratories or
the International Laboratory Accreditation Cooperation or the Asia Pacific Laboratory Accreditation
Cooperation or the National Institute of Solar Energy (NISE) or can be a third-party test lab or
manufacturer owned test lab capable of testing as amended from time to time.
ANNEXURE
(Form for Test Report)
1. General Information—
Name of the Laboratory
Address
Date of Receipt
Lab accreditation number and validity period
Test Standard followed
Test Report No. | Date of testing
Tested by | Reviewed by
2. Details of the Sample Tested —
Name of the Brand
Model Name
Model No.
Month and year of manufacturing
Manufacturer Serial Number (if any)
Rated AC output power (kW)
Rated AC output voltage (V)
Overall efficiency (%)
3. Test condition details —
Ambient Temperature (°C)
Output voltage (V)
Output frequency (Hz)
Input voltage while testing (V)
4. Test results-
Static MPPT efficiency (%)
Conversion efficiency (%)
Overall efficiency @ Standard Test Conditions (STC) (%)
[F. No. 10/4/2024-EC]
DHIRAJ KUMAR SRIVASTAVA, Chief Engineer
NOTIFICATION
New Delhi, the 12th November, 2025
S.O. 5128(E).— In exercise of the powers conferred by clauses (b) and (d) of section 14 of the
Energy Conservation Act, 2001 (52 of 2001), the Central Government in consultation with the Bureau of
Energy Efficiency, hereby specifies an output voltage of 230 V AC, 50 Hz for single phase and up to and
including 415 V AC, 50 Hz for three phase grid connected solar inverters without storage up to and including
100 kW rated output power covered under the scope of IS 17980:2022 / IEC 62891:2020, for the purposes
of the Act and directs that any such appliance or class of appliances being manufactured or imported in India
shall display particulars on labels in the manner as specified through regulations by the Bureau.
[F. No. 10/4/2024-EC]
DHIRAJ KUMAR SRIVASTAVA, Chief Engineer
Uploaded by Dte. of Printing at Government of India Press, Ring Road, Mayapuri, New Delhi-110064
and Published by the Controller of Publications, Delhi-110054.
Digitally signed by GORAKHA NAΤΗ
GORAKHA NATH YADAVA YADAVA
Date: 2025.11.13 15:24:16 +05'30'