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Test shows higher yield, lower degradation for n-type solar modules – pv magazine International


Analysis performed by China’s Nationwide Photovoltaic High quality Inspection Heart exhibits that the brand new n-type TOPCon modules fulfill their promise, surpassing the earlier era of p-type PERC merchandise. Knowledge collected over six months from the fixed-tilt PV system confirmed that the n-type merchandise produced 3.69% extra power, and likewise suffered decrease efficiency loss.

The shift within the PV manufacturing business to n-type tunnel oxide passive contact (TOPCon) cells continues, with the earlier era of p-type PERC now anticipated to vanish from the market within the subsequent few years.

And as extra of those n-type productions make their method into business PV installations world wide, the business desires to see how properly they dwell as much as the claims of upper effectivity, higher efficiency, and a decrease degradation fee that enhances pace. change on the manufacturing aspect.

China’s Nationwide Photovoltaic High quality Inspection Heart is the newest to publish outcomes describing n-type module efficiency within the discipline. The middle procured 20 PV modules – 10 n-type TOPCon and 10 p-type PERC – from Chinese language producer JinkoSolar and performed a check to check their efficiency beneath the identical set up situations.

The modules, all bifacial fashions consisting of 144 half cells, have been first measured within the lab, after which put in on fixed-tilt mounting constructions at a 40-degree angle, on a web site in Yinchuan, northwest China.

Modules on the testing web site in Yinchuan, Ningxia Province.

Picture: CPVT

The power era of the modules is monitored utilizing a DC meter at 1-minute intervals from September 2022 to March 2023. Utilizing knowledge from the lab and out of doors measurements, the workforce calculated the power yield per watt for of every expertise by dividing their cumulative energy era by the typical check energy instances module amount.

Energy era per watt for 2 totally different JinkoSolar modules Group 1 TOPCon Group 2 PERC

After seven months of set up, the outcomes present that the n-type modules (Group 1 within the chart above) achieved a 3.69% acquire in power yield in comparison with PERC merchandise. The modules are additionally monitored for degradation, present process laboratory characterization exams earlier than and after the seven-month set up interval.

These calculations, based mostly on dividing the preliminary energy minus the post-installation energy by the preliminary check energy, present a mean annual degradation fee of 0.51% for TOPCon merchandise, in comparison with 1.38 % for PERC merchandise.

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