Analysis performed by China’s Nationwide Photovoltaic High quality Inspection Middle exhibits that the brand new n-type TOPCon modules fulfill their promise, surpassing the earlier era of p-type PERC merchandise. Information collected over six months from the fixed-tilt PV system confirmed that the n-type merchandise produced 3.69% extra vitality, and likewise suffered decrease efficiency loss.
The shift within the PV manufacturing trade to n-type tunnel oxide passivated 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 enter industrial PV installations around the globe, the trade desires to see how effectively they reside as much as the claims of upper effectivity, higher efficiency, and decrease degradation charges that drive fast switching on the manufacturing aspect.
China’s Nationwide Photovoltaic High quality Inspection Middle is the newest to publish outcomes describing n-type module efficiency within the area. The middle procured 20 PV modules – 10 n-type TOPCon and 10 p-type PERC – from Chinese language producer JinkoSolar and performed a take a look at to match their efficiency below 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 buildings at a 40-degree angle, on a web site in Yinchuan, northwest China.
The modules’ vitality manufacturing was monitored utilizing a DC meter at 1-minute intervals from September 2022 to March 2023. Utilizing information from the lab and out of doors measurements, the staff calculated the vitality yield per watt for of every expertise by dividing their cumulative energy era by the typical take a look at energy occasions module amount.
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 vitality 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, primarily based on dividing the preliminary energy minus the post-installation energy by the preliminary take a look at energy, present a median annual degradation charge of 0.51% for TOPCon merchandise, in comparison with 1.38 % for PERC merchandise.
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