PV Modules: Bifacial technology
go PV
Introduction
Bifacial Gain
Eback
Bifacial Gain
=
=
= Bifacial Ratio * Bifaciality
Efront
•
•
Bifacial gain is the energy production increased due to backside module extra production
Common bifacial gains are in the range of 5% to 10% (albedo between 15-30%). This means that bifacial systems produces
between 5% to 10% more energy than equivalent monofacial installation.
Higher bifacial gains can be obtained with small prototypes because the backside of the modules have a "better view" of the
ground. However the bifacial gain decrease for real PV plants with several and long module rows.
Total bifacial gains since inception, per manufacturer
Bifacial Gain vs. Time of Day
Bifacial Gain
Bifacial Gain
Grass
White
Mfr. A
5.57%
8.28%
Mfr. B
6.57%
8.78%
Mfr. C
7.46%
11.44%
Mfr. D
7.23%
10.73%
Bifacial Gain (%)
25.0%
20.0%
15.0%
10.0%
5.0%
0.0% -
tecnalia
Inspiring
Business
7:50
8:40
9:30
10:20
11:10
12:00
12:50
13:40
14:30
15:20
16:10
17:00
17:50
18:40
7:30
8:20
9:10
10:00
10:50
11:40
12:30
13:20
14:10
15:00
15:50
16:40
17:30
18:20
7:10
8:00
8:50
9:40
10:30
11:20
12:10
13:00
13:50
14:40
15:30
16:20
17:10
18:00
18:50
Data normalized to pre-light soak flash
Example of bifacial gain using different PV modules (A, B, C, D) with two albedo conditions
Bifacial Bake-off: Comparing Technologies and Manufacturers. Jenya Meydbray, PVEL. BiFi July 2020.
●Mfg. A Grass/Dirt
• Mfg. A White ●Mfg. B Grass/Dirt
●Mfg. B White
GoPV Project | 1st TRAINING COURSES
16
TECHNICAL FOCUS ON FUTURE SOLAR PV SYSTEMS
October 26-29th 2020View entire presentation