UPDATE ON SOLAR MODULE CONCEPTS

Transcription

1 UPDATE ON SOLAR MODULE CONCEPTS Harry Wirth Fraunhofer Institute for Solar Energy Systems ISE Munich, June 21st,

2 Introduction PV Modules and Power Plants: Fields of Work Module Technology Module Calibration Module Testing and Degradation Analysis PV Power Plants Building Integrated PV 2

3 Efficiency Matters Module Efficiency Lever 3 U.S. 5.7-kW residential and 100 MW utility scale system cost (USD/Wdc) Technical Report NREL/TP-6A September :8 1:3

4 Efficiency Matters Reference: 3 BB (ribbon) geometrical optical effects electrical Cell-to-Module efficiency analysis with SmartCalc.CTM Mittag et al., PV International 36,

5 Efficiency Matters 5 BB (ribbon) Cell-to-Module efficiency analysis with SmartCalc.CTM 5

6 Efficiency Matters 10 BB (multiwire) Cell-to-Module efficiency analysis with SmartCalc.CTM 6

7 Efficiency Matters 10 BB (multi+half) Cell-to-Module efficiency analysis with SmartCalc.CTM 7

8 Efficiency Matters Shingle (3 BB Equivalent) Cell-to-Module efficiency analysis with SmartCalc.CTM Mittag et al., 44th IEEE Photovoltaic Specialist Conference,

9 Efficiency Options Shingle Interconnection Definition of cell overlap minimum gap width controlled gap height lean handling Mechanical stress relief FEM study for displacement qualification of ECAs (Electrically Conductive Adhesives) Edge passivation, cell sorting, electrical string design, service life Glass Beinert et al., EU PVSEC EVA

10 Efficiency Options Ribbon Interconnection of Heterojunction Solar Cells ECA joints process temperature below 200 C no cell busbar required optical active ribbons peel force of 1 N/mm achieved curing time below 20 s lead free material Tabber-Stringer solution cycle time 2.3 s (1600 cells/h) Geipel et al., IEEE Journal of Photovoltaics, Stringer TT1600ECA (Teamtechnik)

11 Performance Options The Bifacial Revolution Module design transparent rear side frame junction box/diodes Glass-glass bifacial module 11

12 Performance Options The Bifacial Revolution Module design Module calibration filter Mirror setup for simultaneaous bifacial flasher measurement (CalLab PV Modules) Schmid et al., EU PVSEC

13 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Comparison of different measurement conditions Schmid et al., EU PVSEC

14 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Module design qualification Module with different shading conditions on the rear side (TestLab PV Modules) Philipp, paper submitted to EU PVSEC

15 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Module design qualification Module yield modelling Bifacial PV rooftop system rendering using precise raytracing 15

16 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Module design qualification Module yield modelling Module yield monitoring Single bifacial PV module monitoring: high gain, low relevance 16

17 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Module design qualification Module yield modelling Module yield monitoring Module mounting Measured (+) and modelled (o) irradiance values for different tilt angles 17

18 Performance Options The Bifacial Revolution Module design Module calibration Module inline characterization Module design qualification Module yield modelling Module yield monitoring Module mounting DC/AC system design Bifacial PV rooftop system 18

19 Conclusions module cost share in total system cost severely declined creates strong lever for cell efficiency improvement module efficiency improvement performance ratio improvement proper focus: system yield, not module STC power bifacial technology non-stc operation, soiling, SEM image of interconnection wire soldered to finger 19

20 Thank you very much for your attention! Fraunhofer Institute for Solar Energy Systems ISE Harry Wirth 20