pv magazine test: Latest results

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From August pv magazine

We are happy to present the next batch of energy yield results from the outdoor test field in Xi’an, China. The June 2019 results are presented below, plus additional analysis from George Touloupas, director of technology and quality at CEA.

The first graph (below) right charts the meteo station data (irradiance and ambient temperature) for June 2019. The system was offline due to power cuts on June 1, 2, 29 and 30. The irradiance meters were taken down for calibration from June 19 to 30. Energy yield data was collected for 26 days from June 3 to June 28. Meteo data was collected from June 3 to June 18.

The monthly energy yield data for the months from January to June 2019 is given in the first table at the end of the text, while the second chart (below) shows the total energy yield of all products for June 2019.

Bifacial boost

The overall bifacial boost for June 2019 averaged out to 8.7%. Bifacial boost is defined as the extra energy yield of the bifacial products compared to the average energy yield of all other mono-facial products. Bifacial boost is calculated every day for each bifacial product. The third graph charts the 26-day average energy yield boost of individual bifacial products.

Notes on the yield measurements

The energy yield is given in Wh/Wp and was 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 a plastic cover simulating green grass.

By George Touloupas

Visit the pv magazine test about and results pages for further information.

Average daily and monthly yields

all in Wh/Wp

Jan 2019

Feb 2019

Mar 2019

Apr 2019

May 2019

Jun 2019

Average monthly yield

65.12

75.31

133.23

83.11

96.00

83.83

Average monthly bifacial yield

67.00

79.46

139.23

87.64

101.91

89.64

Average monthly monofacial yield

64.64

74.28

131.85

82.06

94.64

82.49

Operation days

31

28

31

21

25

26

Average daily yield

2.10

2.69

4.30

3.96

3.84

3.22

Average daily bifacial yield

2.16

2.84

4.49

4.17

4.08

3.45

Average daily monofacial yield

2.09

2.65

4.25

3.91

3.79

3.17

Bifacial boost

3.7%

7.0%

5.6%

6.8%

7.7%

8.7%

Energy yield ranking

#

Product

Type

Total Jan 2019 Wh/Wp

Total Feb 2019 Wh/Wp

Total Mar 2019 Wh/Wp

Total Apr 2019 Wh/Wp

Total May 2019 Wh/Wp

Total June 2019 Wh/Wp

Jan 2019 rank

Feb 2019 rank

Mar 2019 rank

Apr 2019 rank

May 2019 rank

Jun 2019 rank

18

LONGi LR6-60BP-300M

Bifacial Mono PERC

68.07

81.23

142.28

89.60

103.89

91.53

1

1

1

1

1

1

17

NSP D6L310L3A

Bifacial Mono PERC

66.96

78.91

138.37

86.84

101.05

89.09

2

2

2

2

2

2

1

Jolywood JW-D60N-305

Bifacial N-PERT

65.98

78.22

137.05

86.47

100.80

88.31

4

3

3

3

3

3

16

LONGi LR6-60PE-310M 2

Mono PERC

66.40

76.43

135.64

84.47

97.70

85.24

3

4

4

4

4

4

7

LONGi LR6-60PE-310M 1

Mono PERC

65.58

75.79

134.69

83.86

97.12

84.16

5

5

5

5

5

5

21

Risen RSM120-6-320M

Mono PERC

131.52

82.20

95.35

83.67

12

8

6

6

20

Phono PS380MH-24/TH

Mono PERC

64.66

74.38

132.18

82.29

94.39

83.26

11

10

6

6

10

7

14

Sample 2

Mono PERC

64.79

74.50

132.00

82.22

95.23

82.87

8

8

7

7

7

8

10

Recom RCM-275-6MB-4-BB21

Mono

65.06

74.62

131.72

81.94

94.90

82.75

7

6

9

10

8

9

8

Aiduo AD280-60S

Mono

64.69

74.18

131.71

81.93

93.90

82.17

10

11

10

11

14

10

2

Phono MWT-60-280

Multi MWT

62.76

72.64

131.19

81.64

94.42

81.90

15

14

13

13

9

11

4

Perlight PLM-300M-60

Mono PERC

65.15

74.48

131.60

81.95

93.92

81.66

6

9

11

9

13

12

3

Risen RSM60-6-270P

Multi

64.02

72.61

131.11

81.46

94.12

81.62

13

15

14

14

11

13

12

NSP D6LM305E3A

Mono PERC

63.79

74.54

131.73

81.84

94.04

81.46

14

7

8

12

12

14

13

Sample 1

Mono

64.76

73.62

128.56

79.79

92.30

80.99

9

12

16

16

16

15

9

Aiduo AD265-60P

Multi

64.06

73.55

130.36

81.19

92.88

80.61

12

13

15

15

15

16

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.