pv magazine test: May 2022 results


The first chart to the right shows the meteo station data (irradiance and ambient temperature) for May 2022. The average bifacial boost is 9.11% for the month. Bifacial boost is defined as the extra energy yield of the bifacial products compared to the average energy yield of all monofacial mono PERC products.

The chart to the bottom right shows the relative yield comparison between different PV module technologies. Although the top performer is Longi’s bifacial PERC module, the average yield of the bifacial TOPCon category leads over the average yield of modules in the bifacial PERC category.

Our test field only has one sample from Jolywood in the n-TOPCon bifacial category. As TOPCon modules become more prominent, we look forward to installing more samples of this type to achieve a more representative yield comparison.

We decided to exclude mono and multi Al BSF (not PERC) samples from our analysis charts, as these technologies are not mainstream anymore and have been effectively retired. Please note that we currently have only one multi sample installed from Znshine and one mono sample from Recom.

Energy yield measurements

  • The energy yield comparison among various technologies, including bifacial boost, will be analyzed using products installed after the beginning of 2019.
  • 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 the sun angle and diffuse irradiance. The ground in this case is gray gravel.

George Touloupas

Bifacial boost
all in Wh/WpTotal Feb 2022Total Mar 2022Total Apr 2022Total May 2022
Average monthly yield103.22113.39135.23155.23
Average monthly bifacial yield106.75118.96145.65166.49
Average monthly monofacial Mono PERC yield101.08111.15131.29152.59
Operation days28313031
Average daily yield3.693.664.515.01
Average daily bifacial yield3.813.844.865.37
Average daily monofacial yield3.613.594.384.92
Bifacial boost5.6%7.0%10.9%9.11%
Energy yield ranking
#Installation MonthProductTypeTotal
Feb 2022 Wh/Wp
Mar 2022 Wh/Wp
Apr 2022 Wh/Wp
May 2022 Wh/Wp
Feb 2022 RankMar 2022 RankApr 2022 RankMay 2022 Rank
268/28/2019LONGi LR6-72HBD375Bifacial Mono PERC109.36122.25150.162171.166841211
2712/31/2019Jolywood JW-D72N-400Bifacial Mono N-TOPCon107.25121.13148.735170.927643332
375/1/2021LONGi LR4-72HBD-445MBifacial Mono PERC108.31122.47149.532170.713042123
284/15/2020Risen RSM114-6-405BMDGBifacial Mono PERC104.86117.57143.790164.64086444
3811/20/2021LONGi LR5-72HBD-535MBifacial Mono PERC106.22117.29143.655164.38785555
34*7/1/2021JA JAM72D20-445MBBifacial Mono PERC106.53116.59142.766162.824784666
327/1/2021Risen RSM150-8-500BMDGBifacial Mono PERC104.74115.40140.941160.75697777
297/7/2020CSI CS3U-390MSMono PERC100.07112.15136.226155.486221511128
307/7/2020GCL GCL-M3/72H380Cast Mono PERC100.46112.59136.622155.45889131099
35*7/1/2021JA JAM72S20-445MRMono PERC102.96111.86136.389155.352318121110
31*10/1/2020JA JAM60S10-345/MRMono PERC101.22113.01136.539155.189621191011
2011/21/2018Phono PS380MH-24/THMono PERC101.97113.99139.528154.7968798812
36*11/20/2021JA JAM72S30-540MRMono PERC101.50110.34134.024152.0231510131313
40*11/20/2021Trina TSM-505DE18M(II)Mono PERC100.72109.68133.449151.8535512141414
33*7/1/2021Trina TSM-450DE173(II)Mono PERC99.89108.98132.261150.6282616161515
213/1/2019Risen RSM120-6-320MMono PERC100.31109.18127.453142.531314151616
105/24/2018Recom RCM-275-6MB-4-BB21Mono98.68104.55117.631128.1239717171717
225/4/2019Znshine ZXP6-60-275/PMulti97.39103.10115.167126.7754918181818

Test cooperation

pv magazine test is a cooperative effort involving pv magazine, APsystems, 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.


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