energize
the earth
buy the sun
Recent studies* show: Micromorph thin-film modules are better than
crystalline modules under real environmental conditions
When purchasing solar modules, many clients orientate themselves environmental conditions only to a limited extent. The average values
around theoretically determined efficiency levels in order to calculate in reality, that is to say  Most Frequent Conditions (MFC), lead to a
future energy output. The declared efficiency is based on simulated significant change in energy output of the various module types. It is in
 Standard Test Conditions (STC), which are built solely on circum- this way that micromorph thin-film modules from Inventux are substan-
stances in the laboratory. Therefore, these parameters reflect real tially more powerful under real conditions than crystalline modules.
Laboratory parameters as compared with real environmental conditions
Standard Test Conditions (STC) Most Frequent Conditions (MFC)
Simulated values Real values
1 Solar irradiation 1,000 W/m2, direct irradiation solely on laboratory 400 - 800 W/m2 *, diffuse and direct irradiation incl.
parameters (without clouds, smog, etc.) environmental influences (with clouds, smog, etc.)
2 Module temperature 25 °C approx. 40 - 75 °C**
1
Solar irradiation in Central Europe* Low light characteristics Inventux modules**
160 Direct irradiation 1.2
STC
Inventux
Diffuse irradiation modules
120
0.8
Crystalline
58% of the average modules
80
irradiation in Europe
Gained surplus
0.4
40 with Inventux
MFC
0 0 Irradiation
J F M A M J J A S O N D Month 0 200 400 600 800 1000 [W/m2]
Only approx. 40 % direct solar irradiation per year Inventux modules offer high returns with diffuse light
Diffuse light predominates in Central Europe with about 60 % Crystalline modules deliver reduced performance
! Problem: The STC-simulation is solely based on direct Inventux Plus: Optimal energy output even with irradiation
solar irradiation at 1,000 W/m2 under 800 Watts (European conditions during 80 % of the year)
2
Module temperature in Central Europe* Temperature coefficients Inventux modules**
40 °C ambient temp.
80
120 Inventux
30 °C ambient temp.
70 Range of average module
modules
20 °C ambient temp.
60 STC temperature in Europe
Range of average module temperature in Europe
10 °C ambient temp.
100 Crystalline
50
modules
40
30
-13 °C ambient temp. 80 Gained surplus
20 with Inventux
STC
10
60
MFC
0 Module
Irradiation 50 temperature
-10
0 200 400 600 800 1000 1200 [Watt] 15 20 25 30 35 40 45 50 55 60 65 70 75 80 [°C]
Inventux modules maintain the majority of their excellent
All module types show module temperatures that are
performance even with increasing module temperature
significantly higher than the ambient temperature
The performance of most other modules drops significantly
! Problem: In order to reach the STC-simulation module
temperature of 25 °C at 1,000 W/m2 irradiation, the Inventux Plus: Increasing energy yield and returns with
ambient temperature needs to be at -13 °C higher temperature when compared to crystalline modules
www.inventux.com
Measurement Techniques IPM
Materials & Solar Cells 93
Photovoltaik-Institute Berlin
**
Source: Self test-measurements at the
(2009), 1062-1065
1000 W
2
[
·/·
]
Irradiation
[kWh/m x month]
Normalized efficiency factor
self test-measurments
MFC
Performance [%]
Module temperature [°C]
* Source: Calculation performed using ISFH Hameln/Emmerthal model
*
Source: Planning and Installing Photovoltaic Systems, DGS 2008
*
Source: Fraunhofer-Institute for Physical
* Source: e.g. Solar Energy
** Source: Test-measurements at the Photovoltaik-Institute Berlin
** Source: Solar Engineering GmbH, OC Oerlikon and
XSERIES
MICROMORPH
Inventux modules are profit-stars
with returns higher than 8 % compared to crystalline modules*
Inventux modules are today s high yield alternative for tomorrow. crystalline solar modules. Inventux modules  an investment
Through our micromorph thin-film technology Inventux modu- that pays off in reality and not just under simulated laboratory
les offer a higher energy production under real conditions, in conditions.
other words:  Most Frequent Conditions (MFC), and with that
automatically higher returns than, for instance, conventional profitable. sustainable. micromorph
Profitability by comparison*
The measurement shows that micromorph photo-
1200
180
Micromorph
voltaic modules generate substantially higher yields
modules
160
1000
due to their technological properties. Compared to
Crystalline
140
modules
conventional crystalline modules, the micromorph
800
120
thin-film technology can even reach a higher energy
100
efficiency in Germany of about 7-10 percent per year.
600
80
In other words: With a 1 kW system, up to 100 kWh
p
400
60
more energy is gained annually.
40
200
20
Generation of energy comparison (monthly and cumulated)
0 0
J F M A M J J A S O N D Month January - December 2007, Germany
Demonstrated returns calculation
Inventux modules Crystalline modules
Installation performance 10 kW
p
Equity return 22.79 % 13.98 %
+
Return gains with Inventux modules Nominal: 8.81 % p.a.
Premises 20 % equity, credit period 18 years  1 year free of redemption, interest rate 5 %,
location Berlin, same system price for both installations, irradiation 1,008 kWh/m2 a,
based on German feed-in tariff at 39,14 ct
Would you like to find out more about the profitability and sustainability of our micromorph
Inventux modules? We are gladly available to you for a consultation at no obligation.
Inventux Technologies AG Wolfener Str. 23 12681 Berlin Germany
T [phone] F [phone] [e-mail]
returns calculation under
the given parameters
p
p
Monthly generation of energy [kWh/kW (DC)]
Cumulative generation of energy [kWh/kW (DC)]
* Source: Institute for Solar Energy Supply Technology (ISET), modules MHI
* In the demonstrated
Art.-No. 160070
01/2010 2 EN (subject to change)