1

2

1

2

energize

the earth

buy the sun

www.inventux.com

Recent studies

*

show:

Micromorph thin-film modules are better than

crystalline modules under real environmental conditions

When purchasing solar modules, many clients orientate themselves
around theoretically determined efficiency levels in order to calculate
future energy output. The declared efficiency is based on simulated
“Standard Test Conditions“ (STC), which are built solely on circum-
stances in the laboratory. Therefore, these parameters reflect real

Laboratory parameters as compared with real environmental conditions

environmental conditions only to a limited extent. The average values
in reality, that is to say “Most Frequent Conditions“ (MFC), lead to a
significant change in energy output of the various module types. It is in
this way that micromorph thin-film modules from Inventux are substan-
tially more powerful under real conditions than crystalline modules.

Inventux modules maintain the majority of their excellent

performance even with increasing module temperature

The performance of most other modules drops significantly

Inventux Plus: Increasing energy yield and returns with

higher temperature when compared to crystalline modules

Temperature coefficients Inventux modules

**

Standard Test Conditions

(STC)

Simulated values

Most Frequent Conditions

(MFC)

Real values

Solar irradiation

1,000 W/m

2

, direct irradiation solely on laboratory

parameters (without clouds, smog, etc.)

400 - 800 W/m

2

*, diffuse and direct irradiation incl.

environmental influences (with clouds, smog, etc.)

Module temperature

25

°C

approx. 40

-

75

°C

**

Inventux modules offer high returns with diffuse light

Crystalline modules deliver reduced performance

Inventux Plus: Optimal energy output even with irradiation

under 800 Watts (European conditions during 80 % of the year)

Only approx. 40 % direct solar irradiation per year

Diffuse light predominates in Central Europe with about 60 %

!

Problem: The STC-simulation is solely based on direct

solar irradiation at 1,000 W/m

2

Solar irradiation in Central Europe

*

All module types show module temperatures that are

significantly higher than the ambient temperature

!

Problem: In order to reach the STC-simulation module

temperature of 25 °C at 1,000 W/m

2

irradiation, the

ambient temperature needs to be at -13 °C

Module temperature in Central Europe

*

Low light characteristics Inventux modules

**

Irradiation

[W/m

2

]

No

rm

al

ize

d

ef

fic

ie

nc

y

fa

ct

or

[η

/η

10

00 W

]

200

1.2

0.4

0

0.8

400

600

800

1000

0

58% of the average

irradiation in Europe

J

F

M

A

M

J

J

A

S

O

N

D

160

120

80

40

0

Direct irradiation
Diffuse irradiation

Month

120

50

Module

temperature

[°C]

Pe

rfo

rm

an

ce [

%

]

100

80

60

Range of average module

temperature in Europe

Irr

ad

ia

tio

n

[k

W

h/

m

2

x m

on

th

]

*

Sour

ce: e.g. Solar Energy

Materials & Solar Cells 93

(2009), 1062-1065

*

Sour

ce: Calculation per

for

med using ISFH Hameln/Emmer

thal model

**

Sour

ce: T

est-measur

ements at the Photovoltaik-Institute Berlin

STC

MFC

STC

Inventux

modules
Crystalline

modules
Gained surplus

with Inventux

Inventux

modules
Crystalline

modules
Gained surplus

with Inventux

*

Sour

ce: Planning and Installing Photovoltaic Systems, DGS 2008

**

Sour

ce: Solar Engineering GmbH, OC Oerlikon and

self test-measur

ments

80

15

25

35

45

55

65

20

30

40

50

60

70 75

MFC

M

od

ul

e t

em

pe

ra

tu

re [

°C

]

Irradiation

[Watt]

40 °C ambient temp.

20 °C ambient temp.

10 °C ambient temp.

-13 °C ambient temp.

0

200

400

600

800

1000

1200

-10

0

10

20

30

40

50

60

80

STC

70

30 °C ambient temp.

M

FC

Range of average module temperature in Europe

*

So

ur

ce

: F

ra

un

ho

fe

r-I

ns

tit

ut

e

fo

r P

hy

si

ca

l

Measur

ement T

echniques IPM

**

So

ur

ce

: S

el

f t

es

t-m

ea

su

re

m

en

ts

a

t t

he

Photovoltaik-Institute Berlin

J

X

SERIES

MICROMORPH

Demonstrated returns calculation

Inventux modules are today‘s high yield alternative for tomorrow.
Through our micromorph thin-film technology Inventux modu-
les offer a higher energy production under real conditions, in
other words: “Most Frequent Conditions“ (MFC), and with that
automatically higher returns than, for instance, conventional

crystalline solar modules. Inventux modules – an investment
that pays off in reality and not just under simulated laboratory
conditions.

profitable. sustainable. micromorph

The measurement shows that micromorph photo-
voltaic modules generate substantially higher yields
due to their technological properties. Compared to
conventional crystalline modules, the micromorph
thin-film technology can even reach a higher energy
efficiency in Germany of about 7-10 percent per year.
In other words: With a 1 kW

p

system, up to 100 kWh

more energy is gained annually.

Profitability by comparison

*

Generation of energy comparison (monthly and cumulated)

January - December 2007, Germany

*

S

ou

rc

e:

In

st

itu

te

fo

r S

ol

ar

E

ne

rg

y

S

up

p

ly

T

ec

hn

ol

og

y

(IS

E

T)

, m

od

ul

es

M

H

I

Inventux modules are profit-stars

with returns higher than 8 % compared to crystalline modules

*

20

0

Month

M

on

th

ly g

en

er

at

io

n o

f e

ne

rg

y [

kW

h/

kW

p

(D

C

)]

40

60

80

100

120

140

160

180

200

0

400

600

800

1000

1200

C

um

ul

at

iv

e g

en

er

at

io

n o

f e

ne

rg

y [

kW

h/

kW

p

(D

C

)]

F

M

A

M

J

J

A

S

O

N

D

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/m

2

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]

*

In

th

e

d

em

on

st

ra

te

d

re

tu

rn

s

calculation under

the given parameters

Micromorph

modules

Crystalline

modules

Ar

t.-No. 160070 01/2010 2 EN (subject to change)