pv magazine test: June 2022 results


The first chart to the right shows meteo station data (irradiance and ambient temperature) for June 2022. The facility experienced a power cut from June 4 to 5.

The average bifacial boost is 11.1% for June 2022. Bifacial boost is defined as the relative advantage of the average specific energy yield of all bifacial products compared to the average specific energy yield of all mono-facial mono PERC products.

The chart (bottom right) shows the relative specific energy yield comparison between PV module technologies. Although the top performer is Longi’s bifacial PERC module, the average specific energy yield of the bifacial TOPCon category leads over the average 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 to achieve a more representative yield comparison. We decided to exclude mono and multi Al BSF (non PERC) samples from our analysis charts, as these technologies have been effectively retired. We currently have one multi sample installed from Znshine and one mono sample from Recom.

Notes on energy yield measurements:

  • The energy yield comparison among various technologies, including bifacial boost, will be analyzed using products installed after the beginning of 2019.
  • 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 stabilization.
  • The results are grouped in categories, per module type.
  • Bifacial boost depends on: bifaciality factor, installation geometry, albedo, sun angle, and diffuse irradiance. The ground is grey gravel.

George Touloupas

Bifacial boost
all in Wh/WpTotal Mar 2022Total Apr 2022Total May 2022Total June 2022
Average monthly yield113.39135.23155.23154.20
Average monthly bifacial yield118.96145.65166.49168.17
Average monthly monofacial Mono PERC yield111.15131.29152.59151.37
Operation days31303128
Average daily yield3.664.515.015.51
Average daily bifacial yield3.844.865.376.01
Average daily monofacial yield3.594.384.925.41
Bifacial boost7.0%10.9%9.11%11.10%
Specific energy yield ranking – historical
#Installation monthProductTypeTotal
Mar 2022 Wh/Wp
Apr 2022 Wh/Wp
May 2022 Wh/Wp
June 2022 Wh/Wp
Mar 2022 RankApr 2022 RankMay 2022 RankJune 2022 Rank
375/1/2021LONGi LR4-72HBD-445MBifacial Mono PERC122.47149.532170.71304173.319331231
2712/31/2019Jolywood JW-D72N-400Bifacial Mono N-TOPCon121.13148.735170.92764173.220383322
268/28/2019LONGi LR6-72HBD385Bifacial Mono PERC122.25150.162171.16684172.432142113
3811/20/2021LONGi LR5-72HBD-535MBifacial Mono PERC117.29143.655164.3878166.205945554
284/15/2020Risen RSM114-6-405BMDGBifacial Mono PERC117.57143.790164.6408165.754724445
34*7/1/2021JA JAM72D20-445MBBifacial Mono PERC116.59142.766162.82478163.816296666
327/1/2021Risen RSM150-8-500BMDGBifacial Mono PERC115.40140.941160.7569162.457797777
29*7/7/2020CSI CS3U-390MSMono PERC112.15136.226155.48622156.05588111288
307/7/2020GCL GCL-M3/72H380Cast Mono PERC112.59136.622155.45889155.9297910999
35*7/1/2021JA JAM72S20-445MRMono PERC111.86136.389155.35231155.6044212111010
31*10/1/2020JA JAM60S10-345/MRMono PERC113.01136.539155.18962153.827769101111
40*11/20/2021Trina TSM-505DE18M(II)Mono PERC109.68133.449151.85355152.2983114141412
2011/21/2018Phono PS380MH-24/THMono PERC113.99139.528154.79687152.00090881213
36*11/20/2021JA JAM72S30-540MRMono PERC110.34134.024152.02315151.4114913131314
33*7/1/2021Trina TSM-450DE173(II)Mono PERC108.98132.261150.62826150.5822616151515
213/1/2019Risen RSM120-6-320MMono PERC109.18127.453142.5313134.6321015161616
105/24/2018Recom RCM-275-6MB-4-BB21Mono104.55117.631128.12397118.9980417171717
235/4/2019Znshine ZXP6-60-275/P

(no cleaning)

*Purchased products from the market, which bypassed the random sampling process. All other products were provided by the suppliers.

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.


This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.