Progress on the SolarChilD project

Enrique Cabrera, Jorge Rabanal, Andreas Schneider,Radovan Kopecek

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Activities of ISC Konstanz with Chile

2

Several Meetings and presentations

Report of the potential of renewable Energies in Chile

Scholarships for PhD program

2007

2008 - 2012 Scientific contribution in European, American and Chilean

conferences

CER-CORFO at ISC Konstanz (twice)

Presentation and several meeting with Chilean institutions

Prof. Dr. Bucher in Chile:

4 PhD Chilean students:

Meetings:

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Activities of ISC Konstanz in Chile

3

Participation in the opening ceremony of SERC Chile

Workshop in Chile: Strategies for Solar Energy and

Basic Science Research

Scientific support on bifacial module for the solar car

SERC Chile at ISC Konstanz: MoU, Labs tour, R&D

2013-2014 SERC Chile:

Development cooperation

in Chile:

´Lighting the Highlands´ with Desafio Levantemos

Chile, Solar electrification for Chilean schools

Latino Festival at University of Konstanz

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Activities of ISC Konstanz in Chile

4

2013-2014 SolarChilD: BMBF: 2 years project

R&D proposal

Development of the desert module (AtaMo)

Solar cooperation between Chile and Deutschland

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

SolarChilD

5

Testing

Module

develo

pm

en

t

- demonstrators

- exchange of students

- workshops

- publications

- new project proposals

PhD student

Jorge Rabanal

Enrique CabreraPablo Ferrada

Andreas Schneider

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Activities of ISC Konstanz with Chile

6

2015

R&D Projects: Application for Projects on German as well as Chilean

level. The aim is to achieve a good exchange program

and to conduct R&D together on cell, module and system

level

Bifacial Solar Energy

Workshop with the

Solar Platform Atacama

Desert (PSDA):

Discussion about of bifacial applications under

extreme climatic conditions

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015 7

Same flux, ribbon and lamination parameters for each group

Exp.1: Degradation of solar materials

a. 1.5 Glass - Desert BS - EVA

b. 1.5 Glass - Std BS - EVA

c. 2.0 Glass - Desert BS - EVA

d. 2.0 Glass - Std BS - EVA

e. 3.2 Glass - Desert BS - EVA

f. 3.2 Glass - Std BS - EVA

g. 3.2 Glass - Desert BS - POE

h. 3.2 Glass - Std BS - POE

i. 2.0 Glass – Trpt BS - EVA

j. 3.2 Glass – Trpt BS – EVA

Outdoor Testing in PSDA

IV measurement h.a.l.m.

Corrosion study

Outdoor Testing at ISC

IV measurement h.a.l.m.

EL, transmitivity

CTM analysis

Ethylene vinyl acetate (EVA) polyolefin elastomer (POE)

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015 8

Investigation of different materials (glass, backsheet, encapsulation, etc).

1 year of installation in the Atacama Desert Solar Platform (PSDA)

Exp.1: Degradation of solar materials

Characterization: Peeling test,

IV, EL,DH 1000-5000,

reflectivity, CTM analysis, etc.

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Damp Heat test

9

FF losses relative to

the module DH0 power

After DH long time

exposure, performance

difference in the groups

due to material

degradation

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Damp Heat test with focus on BS

10

Strong losses for

standard BS after

DH3000. Might be

corrosion

Desert and transparent

backsheet is much

more stable for longer

DH exposure

Transparent BS results

show that even for

other materials allowing

BiFi cells materials

beside glass exist

giving really good

weatherability.

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Damp Heat test with focus on BS

11

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Damp Heat test with focus on the

encapsulation

12

Good results of POE

with desert and

standard BS

It makes sense to use

desert BS + the right

choice of Encapsulant

(EVA or POE) makes

huge differences:

step closer to a desert

module?

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

CTM in dependence of glass thickness

13

In terms of CTM, there seems

to be an increase in Pmpp for

thinner glass due to less

absorption.

It makes sense to use thin

glass and even DH data shows

that if the right BS is used (and

later encapsulant) good results

for long DH testing is seen.

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015 14

investigation of bifaciality installed in the Atacama Desert in term of energy yield

outdoor characterization is needed at the PSDA in order to analyze the

performance behavior under real operating conditions for at least 6 mounts of

measurement

Exp.2: Bifaciality

no cracks are

observed after

soldering

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

IV results

15

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Result

16

Less FF losses

for half size

module on the

same connector

tabs due to the

series

resistances

reduction.

half size solar

cells with half

current reduce

series resistance

losses to a

quarter compared

to full size cells

the energy yield gain!

Enrique Cabrera et al. , bifi PV PSDA in Antofagasta, January 15th 2015

Acknowledgment

This work was funded by the BMBF within the SolarChilD under

project number 01DN14005.

THANK YOU!