On June 27，the GB47834-2026 standard 《Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Crystalline Silicon Photovoltaic Modules and Inverters》 was officially released，and this standard will be implemented from January 1，2027.

According to the standard，in terms of modules，the energy efficiency grades of crystalline silicon photovoltaic modules are divided into 3 grades，of which Grade 1 has the highest energy efficiency，the TOPCon access threshold is about 23.2%，HJT is about 23.2%，and BC is about 23.5%，and the photoelectric conversion efficiency of each energy efficiency grade shall not be lower than the specified value.

According to the standard module size：1134mm×2382mm、STC standard test conditions，the minimum front-side peak power of various types of photovoltaic modules is shown in the table below.

In addition，the coupled environmental stress degradation rate of crystalline silicon photovoltaic modules shall be not higher than 8.6%；for bifacial crystalline silicon photovoltaic modules，the bifaciality of TOPCon cell photovoltaic modules shall not be lower than 75%，HJT cells photovoltaic modules shall have a bifaciality of not lower than 85%，and BC cell photovoltaic modules shall have a bifaciality of not lower than 70%.

In terms of inverters，the energy efficiency grades of photovoltaic grid-connected inverters are divided into 3 grades，of which Grade 1 has the highest energy efficiency. The average weighted total efficiency and maximum conversion efficiency of photovoltaic grid-connected inverters at each energy efficiency grade shall not be lower than the specified values.