pv magazine test May 2019 results

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The chart to the top right shows meteo station data (irradiance and ambient tem- perature) for May 2019. The system was offline due to a power cut from 1-3 May, and scheduled inverter maintenance from 25-29 May. Energy yield and meteo data for these days was therefore excluded.

Monthly energy yield data for the months from December 2018 to May 2019 is given in the second table below. The second chart to the right shows the total energy yield of all products for May 2019.

The bifacial boost for May 2019 aver- aged 7.7%. Bifacial boost is defined as the extra energy yield of the bifacial products compared to the average energy yield of all mono-facial products. The third chart to the right charts the energy yield boost of individual bifacial products.

The chart to the bottom right shows the comparison between different PV module technologies for May 2019. Bifacial mod- ules are steadily performing above the average energy yield level, with multi-crystalline silicon PV products perform- ing under the average energy yield level.

Notes on the yield measurements:

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 dif- fuse irradiance. The ground in this case is a plastic cover simulating green grass.

George Touloupas

Bifacial boost
all in Wh/Wp                                     Dec 2018Jan 2019Feb 2019Mar 2019Apr 2019May 2019
Average monthly yield                         65.4965.1275.31133.2383.1196.00
Average monthly bifacial yield             67.5267.0079.46139.2387.64101.91
Average monthly monofacial yield        64.9964.6474.28131.8582.0694.64
Operation days                                     313128312125
Average daily yield                              2.112.102.694.303.963.84
Average daily bifacial yield                   2.182.162.844.494.174.08
Average daily monofacial yield             2.102.092.654.253.913.79
Bifacial boost                                        3.9%3.7%7.0%5.6%6.8%7.7%
Energy yield ranking
# Product                      Type                 TotalTotal      TotalTotalTotalTotalDecJan         FebMarApr May
DecJan 2019      FebMarAprMay20182019 201920192019 2019
2018

Wh/Wp

Wh/Wp      2019 Wh/Wp2019

Wh/Wp

2019

Wh/Wp

2019

Wh/Wp

rankrank rankrankrank rank
18  LONGi LR6-60BP-300M Bifacial Mono      68.82

PERC

68.07       81.23142.2889.60103.8911        111          1
17 NSP D6L310L3A            Bifacial Mono      67.05

PERC

66.96      78.91138.3786.84101.0522        222          2
1 Jolywood JW-D60N-305 Bifacial N-PERT    66.6865.98       78.22137.0586.47100.8044          333          3
16 LONGi LR6-60PE-310M 2 Mono PERC       67.0566.40      76.43135.6484.4797.7033        444          4
7   LONGi LR6-60PE-310M 1 Mono PERC          66.2465.58       75.79134.6983.8697.1255        555         5
21 Risen RSM120-6-320M    Mono PERC             ––             –131.5282.2095.35–         –128          6
14  Sample 2                     Mono PERC        65.1264.79       74.50132.0082.2295.2398          877          7
10  Recom RCM-275-6MB-   Mono               65.31

4-BB21

65.06       74.62131.7281.9494.9067         6910          8
2  Phono MWT-60-280       Multi MWT         63.5262.76       72.64131.1981.6494.421515          141313          9
20  Phono PS380MH-24/TH Mono PERC        65.1064.66      74.38132.1882.2994.391011         1066         10
3  Risen RSM60-6-270P      Multi                 63.9964.02       72.61131.1181.4694.121313          151414          11
12  NSP D6LM305E3A          Mono PERC        63.8063.79       74.54131.7381.8494.041414          7812         12
4   Perlight PLM-300M-60  Mono PERC        65.1465.15       74.48131.6081.9593.9286          9119         13
8   Aiduo AD280-60S          Mono                 65.0464.69      74.18131.7181.9393.901110          111011         14
9  Aiduo AD265-60P          Multi                 64.2964.06      73.55130.3681.1992.881212          131515         15
13  Sample 1                      Mono                  65.2664.76       73.62128.5679.7992.3079         121616          16