HIGH VOLTAGE STRESS TESTING OF SOLAR MODULES Test Report V 309/2013

Transcription

1 F RAUNHOF ER -CENTER F OR SIL ICON -PHOTOVOL TAICS CSP HIGH VOLTAGE STRESS TESTING OF SOLAR MODULES Test Report V 309/2013

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3 ~ Fraunhofer csp SYNOPSIS High Voltage Stress Testing of Solar Modules Test Report: V 309/2013 Date of Report: 2013/ PV-modules Innotech Solar EcoPlus ITS220ECU6 were tested under the following conditions Temperature: 50 C Humidity: 50 % r.h. Duration : 48 h (at elevated conditions) Bias: Vdc between front covering AI-foil and connectors No power degradation was observed. ~ Fraunhofer esp Walter-Hülse-Str Ha lle (Saale) /CtHktqJ!~0) Di. Matthias Ebert Head of Group Modu le Reliability

4 REPORT High Voltage Stress Testing of Solar Modules Jens Fröbel Sascha Dietrich Fraunhofer-Center for Silicon-Photovoltaics CSP Walter-Huelse-Straße Halle (Saale). Offer Number: C_322029_13_froe CSP Project Number: Customer: Eckehard Hofmüller ITS Halle Cell GmbH Orionstraße 1 - Gewerbegebiet Halle/Queis Kabelsketal - Germany

5 Table of Content 1 Task Test Report Overview Test Report STC Measurement Test Report Electroluminescence Imaging Fraunhofer CSP HVST Innotech Solar 5 11

6 1 Task Task 2 PV modules provided by Innotech Solar (customer) is to be tested as follows. The high voltage stress test will be carried out in the following configurations. 1. Temperature: 50 C ±0.5K Humidity: 50% ±5% rel. Voltage: V - negative potential to J-Box-connectors - positive potential to module frame, glass front fully covered with Al-foil Duration: 48 hours For the investigation on PV modules susceptibility on Potential Induced Degradation we propose the following procedure. 1. Visual inspection on abnormalities or evidence to damage 2. Electroluminescence Imaging at Isc (here 8,0A) 3. Pre-stress STC measurement with AAA Flasher 4. High-Voltage Stress Test (HVST) according paragraph 4 5. Post-stress STC measurement with AAA Flasher (2-8 hours after HVST) 6. Electroluminescence Imaging at Isc (here 8A) Fraunhofer CSP HVST Innotech Solar 6 11

7 2 Test Report Overview Test Report Overview Project Objective CSP Project Number High Voltage Stress Testing of Solar Modules (HVST) Report Created By Jens Fröbel Date 2013/04/16 Report Revised By Sascha Dietrich Date 2013/04/16 Test Period 2013/03/ /04/10 Pass / Fail Criterion 5 % rel. loss in Pmpp after testing Specimens CSP No. Serial Number Result Module Type: Innotech Solar EcoPlus ITS220ECU6 CSP_InHo_1_P passed CSP_InHo_1_P passed Test Conditions Type of Test High Voltage Stress Test Test Setup Temperature 50 C Humidity Duration 50 % r.h. 48 h (at elevated conditions) Voltage: V bias - negative potential to J-Box-connectors - positive potential to module frame, glass front fully covered with Al-foil Test Procedure Step Description Equipment Remarks Voltage Generator Climate Chamber 1 Visual Inspection 1 Electroluminescence 2 STC Measurement 3 HVST 4 STC Measurement (2-8 hours after HVST) 5 Electroluminescence EST-HV 500 CWL-46/46 Fraunhofer CSP HVST Innotech Solar 7 11

8 current [A] 3 Test Report STC Measurement Test Report STC Measurement Conductor Jens Froebel Test Date 2013/03/28 Prior HVST 2013/04/10 After HVST Applied Standard DIN EN ; IEC Ed 2 Equipment Berger Lichttechnik Sun Simulator PSLoad 8 Electrical Parameters CSP No. CSP_InHo_1_P01 Step Pmpp Isc Voc FF [W] [A] [V] [%] Prior 256,47 9,02 37,81 75,19 After 255,80 9,04 37,92 74,63 IV Curve CSP_ImHo_1_P1 virgin CSP_ImHo_1_P1 PID voltage [V] Fraunhofer CSP HVST Innotech Solar 8 11

9 current [A] CSP No. CSP_InHo_1_P02 Step Pmpp Isc Voc FF [W] [A] [V] [%] Prior 254,68 8,92 37,65 75,82 After 253,95 8,95 37,70 75,25 Test Report STC Measurement CSP_ImHo_1_P2 virgin CSP_ImHo_1_P2 PID voltage [V] Fraunhofer CSP HVST Innotech Solar 9 11

10 4 Test Report Electroluminescence Imaging Test Report Electroluminescence Imaging Conductor Jens Froebel Test Date 2013/03/28 Prior HVST 2013/04/10 After HVST Equipment greateyes - LumisolarProfessional - HiRes - System Electroluminescence Images CSP No.: CSP_InHo_1_P01 Prior Current [A] Voltage [V] Exposure [ms] After Current [A] Voltage [V] Exposure [ms] 8,0 43, ,0 43, Fraunhofer CSP HVST Innotech Solar 10 11

11 CSP No.: CSP_InHo_1_P02 Prior Current [A] Voltage [V] Exposure [ms] After Current [A] Voltage [V] Exposure [ms] Test Report Electroluminescence Imaging 8,0 43, ,0 42, Fraunhofer CSP HVST Innotech Solar 11 11