Environmental Engineering Reference
In-Depth Information
Table 4.6 Technical Data for Various Photovoltaic Modules
Name
SM 55
BP585 NT51A85E50-ALF UPM 880
ST40
Manufacturer
Siemens
BP Solar
Sharp
ASE
Unisolar Siemens
Number of cells
36 (3 12)
36 (4 9)
36 (4 9) 36 (4 9)
-
-
Cell type
mono-Si
mono-Si mono-Si poly-Si
a-Si
CIS
MPP power P MPP
Wp
55
85
85.5
50
22
38
Rated current I MPP
A
3.15
4.72
4.91
2.9
1.4
2.29
Rated voltage V MPP
V
17.4
18.0
17.4
17.2
15.6
16.6
Short circuit cur. I SC
A
3.45
5.00
5.5
3.2
1.8
2.59
Open circuit volt. V OC
V
21.7
22.03
22.0
20.7
22.0
22.2
α ISC
Temp. coeff.
%/°C
+0.04
+0.03
+0.05
+0.09
*
+0.01
α VOC
Temp. coeff.
%/°C
-0.34
-0.34
-0.35
-0.38
*
-0.60
α PMPP
Temp. coeff
%/°C
*
*
-0.53
-0.47
*
*
Module efficiency
%
12.9
13.5
13.4
11.5
5.4
8.9
Length
mm
1293
1188
1200
965
1194
1293
Width
mm
329
530
530
452
343
329
Weight
kg
5.5
7.5
8.5
6.1
3.6
7.0
Bypass diodes
2
2
36
2
13
1
Note: * = no information
S OLAR G ENERATOR WITH L OAD
Resistive load
The previous sections described characteristics of solar cells, modules and
generators only. In reality, photovoltaic modules should provide electricity that
is used by the consumer with an electric load.
The simplest load is an electric resistance R (Figure 4.30). A straight line
describes the resistance characteristic. Ohm's law describes the relation
between current and voltage:
(4.67)
Figure 4.30 Solar Generator with Resistive Load
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