MNRE Proposes 1 Percent Hike in Solar Module Efficiency Threshold in ALMM from January 1, 2027
The Ministry of New and Renewable Energy has proposed raising ALMM module efficiency thresholds by one percent from January 1, 2027 and by an additional 0.5 percent from January 1, 2028 to drive adoption of higher-efficiency solar technologies.
November 29, 2025. By Mrinmoy Dey
The proposed revisions in the minimum module efficiency threshold aim to ensure that only high-quality, high-efficiency modules enter the ecosystem while filtering out outdated or lower-efficiency technologies, stated MNRE in a notification.
Under the draft order, MNRE plans to introduce higher efficiency requirements in two stages, beginning January 1, 2027 and further tightening them from January 1, 2028.
For utility-scale and grid-connected projects, the minimum efficiency for c-Si modules is proposed to rise to 21 percent from 2027 and 21.5 percent from 2028, while CdTe modules would need to meet 20 percent and 20.5 percent, respectively.
Rooftop and solar pumping installations would require c-Si modules with at least 20.5 percent efficiency in 2027 and 21 percent in 2028, and CdTe modules at 19.5 percent and 20 percent. For off-grid DRE applications using modules below 200 Wp, both c-Si and CdTe technologies would need to meet 19 percent efficiency from 2027 and 19.5 percent from 2028.
Other applications would require c-Si modules at 20 percent and 20.5 percent, and CdTe modules at 19 percent and 19.5 percent over the same period.
MNRE has argued that these efficiency increases are essential to ensuring that the ALMM remains firmly rooted in commercially relevant technology standards and encourages manufacturers to adopt more advanced production lines. The ministry has also emphasised that the new thresholds are designed to keep the list free of obsolete technologies, thereby enhancing overall system performance and supporting the long-term reliability of solar installations across the country.
The Ministry has also sought stakeholder feedback and suggestions by December 27, 2025.
MNRE has further clarified that the solar PV modules that are presently enlisted in ALMM or get enlisted in ALMM in the next few months but have solar PV module efficiencies below the revised module efficiency thresholds proposed above, will be removed from the ALMM List-I for solar PV modules once the new module efficiency thresholds become effective.
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