From solar module reliability to bifacial solar module production lines

Transcription

1 From solar module reliability to bifacial solar module production lines Thomas Söderström Head of TPI-M department at Meyer Burger AG, Switzerland September 2015

2 Meyer Burger / Hot Spots 2

3 Meyer Burger / Wind, Snow Loads 3

4 Meyer Burger / Fire 4

5 Meyer Burger / Creep 5

6 Meyer Burger / Solar cell quality 6

7 22 years modules in CH 0h 1000h -15 % loss after 20 years 1000 h in DH => -60% loss 7

8 Our PV Story Browning crisis Party Time, Free Cocaine 2015 Consolidation BC changed Reliability IEC ext. Demo runs (24h) xx MW plant 8 Meyer Burger /

9 Meyer Burger Focus A Diamond Wire Sawing Thinner wafer, reduced kerf loss Lower costs Heterojunction (HJT) Texture a-si front/ rear side TCO front/ rear side Print front/ rear side High efficiency Lower system cost (BOS) Independent of wafer thickness D Adapted test metrology High capacity cells Busbarless cells DragonBack PED (Chipping) Curing Test & Sort Only 6 process steps Low COO C Higher energy yield Low temp. coefficient Bifacial E SmartWire Connection (SWCT) B Single Wafer Tracking Quality & performance control TCO layer and wafer thickness suitable for SmartWire 80% less silver Higher energy yield Higher efficiency Longevity and micro-crack resistant D A 9 Meyer Burger / B C E

10 Bifacial solar cells and modules HJT cell 22-23% HJT module W Record 10 Meyer Burger / W (100 cells)

11 Bifacial solar cell and modules lines HELIA Tools: Hohenstein-Ernstthal SWCT Tools: Thun HELiA PECVD HELiA PVD 11 Meyer Burger / Cell and module lines are in ramp up phase

12 21.20% 21.30% 21.40% 21.50% 21.60% 21.70% 21.80% 21.90% 22.00% 22.10% 22.20% 22.30% 22.40% 22.50% 22.60% 22.70% 22.80% 22.90% 23.00% 23.10% 23.20% 23.30% Frequency HJT Line Performance Cell efficiency distribution N-type CZ, 6 inch mono wafer December 2013 ~1000 cells Median: 21.94% (± 0.26%) March 2015 ~2350 cells Median: 22.51% Record bifacial cell 50 0 Efficiency Eta Jsc (ma/cm 2 ) Voc (mv) FF 23.32% % 12 Meyer Burger /

13 Current [A] Module Line Performance Power distribution Module power between W => Record 319 W (PSQ M0) Glass-Glass enables bifacial => 6-7W lower at flasher but 13 Meyer Burger / Voltage [V] Pmax [W] Voc [V] Isc [A] FF [%] Full cells 300 mu wires Half cells 200 mu wires

14 Meyer Burger / 2015 $/kwh HJT SWCT GG Higher energy yield (kwh/wp and kwh/m 2 ) Location: Lugano, Switzerland Moderate Climate, average air temp ºC Period: Measured independently by SUPSI kwh/wp c-si multi HJT competitor CdTe CIGS MB GG Power [Wp] Summer 2014 reference + 1.3% + 6.8% + 6.9% % Clear days reference + 1.6% + 7.0% + 7.1% % Cloudy days reference - 0.2% + 4.9% + 5.1% % kwh/m 2 c-si multi HJT competitor Summer 2014 CdTe CIGS MB GG reference +22.6% -27.0% -7.9% +25.3% MB GG Bifacial Excellent low light Low temp. Coeffi: -0.25%/K No LID, No PID 288 Wp GG => 328 Wp equivalent

15 SWCT Module Reliability Modules after 7000h DH < 2% degr. GG SWCT/TPO GG 3BB/EVA GBS 3BB/EVA GG SWCT/TPO GG 3BB/EVA GBS 3BB/EVA Encapsula nt Water absorption (%) <2% deg. 20% deg. 40% deg. WVTR (g/m 2 /da y) EVA TPO <0.1 <5 PVB Ionomer <0.1 Silicone <0.1 >35 Polyolefin encapsulant material GG module with TPO encapsulant has excellent performance in damp heat condition and therefore reduce furthermore the degradation rate Meyer Burger /

16 Meyer Burger / 2015 Module Reliability Damp heat testing Stable modules without power losses (> 4000 h) Thermal cycling testing Stable modules after 600 cycles DH then TC Sable module after 3000h of DH and 950 TC DH Initial DH 4000h TC initial TC 600 cycles Power [W] Loss [%] Damp heat Thermocycles 16

17 Low degradation rate Busbar Technology SWCT Technology Image from: ISFH Inactive cell area due to crack Full cell area is active after crack Dense SWCT contact matrix No negative impact of micro cracks less degradation over module life time Meyer Burger /

18 Meyer Burger / IEC + UL certificates 2 TPOs, 2 Backsheet (with & without Al), PERC, HJT, Integrated diode 18

19 Meyer Burger / ) Certificate 2) Extensive reliability testing 3) Excellent COO 0.5$/Wp 4) High module power => Low BOS 5) Demo runs on going Is that enough to invest for 1 GW? Where is the reference plant? 19

20 Meyer Burger / CSEM 20

21 Meyer Burger / Monterosa 3500m 21

22 Meyer Burger / Bifacial Module design classic decentralized Lower cost, lower area loss Lower back side shading 22

23 Meyer Burger / HJT SWCT in CH SWCT PERC Monofcial & 500 SWCT HJT Bifacial 23

24 Meyer Burger / Our MB PV Evolution X mg Bifacial Low cost Bifacial Technology: Extended durability: >2 * IEC passed + >1400 contact points per cell Medium scale coming to proof the HJT-SWCT-GG Potential improvement: Half cells, squared modules, standard W 600 Weq 24

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