Trina's Vertex Modules Deliver Strong Results In TÜV Rheinland Testing

Leading testing service provider, TÜV Rheinland, recently started conducting a 12-month field performance test of Trina Solar’s 210 Vertex ultra-high power monofacial and bifacial modules since November 2021. Data analyzed for the first four months shows that under various conditions of latitude and climate, the Vertex 600W+ modules have demonstrated strong bifacial gain, greater energy yield gain and more stable working temperature than regular reference modules. The results will be gratifying for Trina, which has been leading the push for the bifacials in 210 mm size.

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The outdoor test sites include Cologne, Germany (temperate zone), Thuwal, Saudi Arabia (tropical desert) and Hainan province, China (maritime). This field test focuses on the project in Cologne, and results indicate a 2% energy yield gain from the Vertex 600W bifacial modules.

Vertex 600W+ modules: 2% higher energy yield in low irradiation

Cologne, with its four distinct seasons, and low irradiation was chosen as a low irradiance zone.

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The test sample of Cologne’s project site is Type A: 210 Vertex monofacial 650W module, and Type B: regular reference monofacial 535W module.

The meteorological data between 2021/11-2022/2 can be seen below:

During the testing period, Trina Solar’s Vertex modules gained more than 2% higher energy yield. TÜV Rheinland has conducted in-depth analysis on this result.

Analysis: Low irradiation plus Vertex modules 

Firstly, Trina Solar’s 210 Vertex modules have demonstrated superior power generation per watt under low irradiation conditions. When irradiation is lower than 200W/m², the power generation of 210 Vertex modules is 3.88% higher than that of the reference modules; when irradiation is between 200-400W/m², the power generation is 2.11% higher.

Secondly, it was winter in Cologne during the test period, and irradiation and temperatures were very low. The average daily solar irradiance was only 0.4kWh/m²/day.

Taking 2021/12/22 as an example, solar irradiance for a whole day was 2.17kWh/m², much higher than the average of 0.4kWh/m²/day. Nevertheless, 43% of the irradiation of the day was lower than 400W/m², and the highest irradiation of the day was less than 600W/m². The low irradiation of a German winter highlights the superior power generation of Trina Solar’s 210 Vertex modules.