Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

3/9
Service measurements
In 2007 a total of 342 I-V measurement were performed for third-parties. For several modules, in addition
to the I-V determination, other measurements were executed:
� 22 determination of the temperature coefficients;
� 21 I-V characterization at different irradiances (200, 400, 600 and 800 W/m²);
� 47 outdoor initial degradation (20-40 kWh/m²), were the IV characterization is performed before
and after the exposure;
� I-V determination with multiflash method;
� Visual inspection (according to IEC 61215);
� Insulation test (according to IEC 61215);
� Electrical continuity test;
� By-pass diode test.
N° of modules
400
350
300
250
200
150
100
50
0
73
TERZI Sussidi TI Progetto PVE International Intercomparison Progetto PV Performance
104
190
12
95
30
97
10
163 158 156
2001 2002 2003 2004 2005 2006 2007
Year
12
41
262
342
Figure 1: evolution of
service measurements
at ISAAC-TISO
From 2001 to 2007 the
total amount of services
measurements with the
sun simulator was 249
meas./year.
3.2 Outdoor Test (cycle no. 10)
3.2.1 Power verification
In March 2006 a new 15 months test cycle (no.10) began and ended in June 2007 [1]. Fourteen different
module types were chosen, in an attempt to include the greater part of available technologies: 8
mc-Si, 2 sc-Si, 1 HIT, 2 a-Si and 1 CdTe. Power (Pn), production tolerance (tp) and warranties (w)
given by the manufacturer are shown in Table 1.
Type of
meas.
Direct with c-
Si ref cell
Multiflash
Direct with
filtered c-Si
ref cell
MODULE
Cell Type Pn [W]
tp
(tolerance)
[%] / [%]
Pa [W]
(Pa-Pn)/Pn
(%)
w
(warranty)
[%] (years)
P15 [W]
(P15-Pn)/Pn
(%)
Miitsubishi PV-MF130EA2LF mc-Si 130 + 10 / - 5% 130.2 0.1% NA 129.1 -0.7%
Suntech STP150-24 mc-Si 150 � 3% 150.1 0.1% 90 (12y) 147.7 -1.5%
Kyocera KC125GHT-2 mc-Si 125 + 10 / - 5% 123.7 -1.0% 90 (12y) 121.1 -3.1%
RWE ASE-165-GT-FT mc-Si 165 � 4% 161.6 -2.0% NA 154.9 -6.1%
Solarwatt MHHplus220 mc-Si 210 � 3% 202.0 -3.8% 90 (12y) 192.8 -8.2%
IBC-215S Megaline mc-Si 215 � 2.5% 210.3 -2.2% 90 (12y) 209.8 -2.4%
Solar World SW165 mc-Si 165 � 3% 162.9 -1.3% 90 (10y) 159.4 -3.4%
BP Solar BP7180 sc-Si 180 - 0 / + 2.5% 174.7 -2.9% 90 (12y) 170.2 -5.5%
Sharp NT-175E1 sc-Si 175 � 5% 174.0 -0.6% NA 171.2 -2.2%
Sanyo HIP180NE1 HIT 180 + 10 / - 5% 180.4 0.2% 80 (20y) 176.3 -2.0%
Sunpower STM210 F sc-Si 210 - 0 / + 3% 204.6 -2.6% 80 (25y) 199.8 -4.8%
First Solar FS-60 CdTe 60 � 5% NaN NaN 90 (10y) 57.9 -3.5%
Kaneka K60 a-Si 60 + 10 / - 5% 84.0 39.9% 90 (12y) 55.8 -7.0%
UniSolar ES-62T a-Si 62 � 5% 64.3 3.6% (10y) 54.4 -12.3%
Table 1: Warranties and differences between initial power (Pa), stabilised power (P15) vs. nominal
power (Pn), sorted by type of measurement (i.e. direct, multiflash or direct with spectral
matched reference cell) and cell typology.
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