JinkoSolar and Trina Solar individually reported that on-field testing confirmed tunnel oxide passivated contact (TOPCon) photo voltaic modules to outperform p-type back-contact PV modules in month-to-month energy technology.
Chinese photo voltaic module producers JinkoSolar and Trina Solar have every revealed white papers this week exhibiting their panel applied sciences at TOPCon supply superior energy yields in comparison with photo voltaic module applied sciences. back-contact (BC).
In its case examine, JinkoSolar defined that the check came about at its facility in Kagoshima, Japan, from Sept. 12 to October 11, with outcomes confirmed by TÜV Nord in Germany.
“The TOPCon product reveals a mean vitality yield of two.22% and is as much as 6.95% larger than its p-type back-contact counterpart,” the corporate stated in an announcement. “In the previous few months, the photovoltaic business has been debating in regards to the technical route of xBC applied sciences. The producers promise extra energy and effectivity in entrance as a result of there isn’t a grid line in entrance of the product. And as they enter some pilot initiatives, we are going to see how these claims play out within the discipline below totally different local weather situations.
The check included three modules: a 575 W dual-glass n-type TOPCon module from JinkoSolar, a 580 W dual-glass p-type back-contact (BC) module, and a 605 W single- glass n-type BC module. The identities of the 2 BC module producers haven’t been disclosed. All modules are put in at a 20-degree tilt angle and 1 meter above the bottom.
Using the CR1000X system, JinkoSolar consultants discovered that the TOPCon module produced 136.86 kWh/kW, whereas the p-type BC produced 133.87 kWh/kW and the n-type BC produced 129.98 kWh/kW.
“Thanks to its larger bifaciality and decrease temperature coefficient, when normalized based mostly on every module’s energy ranking, the module achieves a yield of two.22% larger than p-type BC and 5.29% which is larger than n-type BC,” stated JinkoSolar. “On sunny and cloudy climate days, TOPCon modules vitality yield all the time stays 2% to three% larger than p-type BC modules and 5% to six% larger than n-type BC modules.”
The TOPCon module reportedly achieved the best efficiency ratio of the three merchandise.
“TÜV Nord measured a 94.19% efficiency ratio for the TOPCon module, with the opposite two following barely, 91.99% for the p-type BC and 89.29% for the n-type BC,” the notes on white paper.
In a separate report, Trina Solar stated its TOPCon modules present a mean energy technology achieve of three.15% per watt of XBC modules, with a relative month-to-month achieve of as much as 3.4%. .
The firm performed measurements at its check discipline in Changzhou, Jiangsu province, China, from July 16 to Sept. from an unnamed provider.
The panels are mounted at a 23-degree tilt angle on cemented soil with roughly 30% reflectivity, positioned 0.5 meters above the bottom. An IV-tracker collects energy technology knowledge.
“TOPCon modules have been confirmed to carry out higher in low irradiance situations corresponding to early morning and night, after analyzing the ability technology knowledge at totally different instances of the day,” stated Trina Solar. “From 7 a.m. to eight a.m., TOPCon’s energy technology per watt is 6.9% larger than TBC, and from 5 p.m. to 7 p.m. the relative revenue was 8.3% to eight.4%. This result’s in keeping with earlier discipline assessments which confirmed that TOPCon modules outperform rear contact applied sciences by about 5% in low gentle situations.
The firm additionally says TOPCon’s superior bifaciality is the important thing think about its “superior” energy technology. “TOPCon modules present a 2.6% energy technology benefit over TBC modules, even at midday, when daylight could be very sturdy, which may be attributed to their bifaciality,” it stated. “These findings are according to outcomes from the National Photovoltaic and Energy Storage Experimental Platform and National Center of Inspection of Solar Photovoltaic Products Quality.”
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