If there is anything that has been stagnant in our TOP SOLAR MODULES list, it’s the efficiency range of PERC products. While the lower limit would not change as it is also the gateway efficiency to TOP SOLAR MODULES, the higher limit has increased only once over the last 3.5 years, in February 2022. That means, within the timeline scope of this report, i.e., 2023-2024, the efficiency range of PERC has not changed at all. While a few companies did announce PERC modules above 21.7%, we did not find proof of commercialization for these modules, and thus have excluded them from the TOP SOLAR MODULES list. The downward trend for PERC products continued in H1 2025, with 2 long-standing modules delisted in January – one from Risen and the other from Akcome. Risen’s PERC product entered the list in November 2022 with 21.7% efficiency, while Akcome’s was listed with 21.68%. These removals reduced the PERC product count from 20 in December 2024 to 18, further diminishing the technology’s share in the TOP SOLAR MODULES listing.

In contrast, 2024 saw slightly more activity, though mostly on the negative side. Only one new PERC module was added during the year – Kalyon PV’s 21.61% efficiency module, which debuted in March. However, this was also the first to be delisted, exiting the list in July as the company discontinued its PERC offerings. This was followed by further exits from Tongwei Solar in September, Astronergy and Talesun in October, and JinkoSolar in November, all of whom ceased commercial activity for PERC-based products during the year (see PERC Module Share Continues To Decline In 2025).

The story was slightly different in 2023. Products from LONGi, Risen, and Canadian Solar were at the top level of 21.7% throughout the year. Other products to remain unaltered during the course of 2023 were: JinkoSolar and Akcome modules at 21.68%; 3 companies at 21.6% – Trinasolar, JASolar, and Talesun; Jinergy, Seraphim, and Yingli at 21.57%; EGING PV at 21.56%; and Qcells listed at 21.5%.