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

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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

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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

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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 developm

ent

- demonstrators - exchange of students - workshops - publications - new project proposals

PhD student Jorge Rabanal

Enrique Cabrera Pablo 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 - TM

h. 3.2 Glass - Std BS - TM

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) / Thermoplastic Material(TM)

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)

Characterization: Peeling test, IV, EL,DH 1000-5000, reflectivity, CTM analysis, etc.

Exp.1: Degradation of solar materials

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

Damp Heat test

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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

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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

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

Damp Heat test with focus on the encapsulation

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Good results of TM with desert and standard BS

It makes sense to use desert BS + the right choice of Encapsulant (EVA or TM) 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

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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

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

Result

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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!