pv magazine test

The first chart to the right showcases the meteo station data (irradiance and ambient temperature) for June 2020. Meteo data is missing from June 22 to June 30 due to a power cut.

The average bifacial boost is 8.5% for June 2020. Bifacial boost is defined as the extra energy yield of the bifacial products compared to the average energy yield of all mono-facial mono PERC products.

The chart to the bottom right shows the comparison between different PV module technologies for June. Bifacial modules are steadily performing above all the other technologies, with multicrystalline silicon PV having the lowest yield.

Notes on the energy yield measurements:

• The energy yield is given in Wh/Wp and calculated by dividing the energy produced by the module by the Pmax at STC of the module. This Pmax is the maximum STC power after a process of stabilization.
• The results are grouped in categories, per module type.
• The bifacial boost depends on many parameters: the bifaciality factor, the installation geometry, the albedo of the ground, and also the sun angle and diffuse irradiance. The ground in this case is grey gravel. George Touloupas

We are pleased to present the next batch of energy yield results from the outdoor test field in Xi’an, China. In this edition, George Touloupas –director of technology and quality at CEA – looks at the June results and provides additional analysis.

Test cooperation

pv magazine test is a cooperative effort involving pv magazine, CEA and Gsolar. All testing procedures are carried out at Gsolar’s test laboratory in Xi’an, China. CEA supervises these tests and designed both the indoor and outdoor testing procedures.