Open to the future of Energy

Open to the future of Energy

The first vertically integrated Solar Module Producer in Southeast Europe

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Introduction

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Introduction

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Introduction

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Introduction

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SCH: Who we are

SCH Group Multicrystaline Solar Production Facilities, Industrial Zone of Patras

Ingots Wafers Cells Modules

Multicrystalline silicon solar wafers cells modules

First Vertically integrated production in SE Europe

Total Production Capacity:80 MWp/year

Total investment: 120 M€ Total building space: 14.000 m²

Foundation year: 2006

Si PV

Power Plants

Electricity

80 MW/yr

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Turn-key development by GT Solar, world recognised turn-key solution provider

www.schellas.gr

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Wafer Production Capacity: 80MW/yr

Silicon Ingot crystal growing

Slice silicon ingots into bricks

Slice silicon bricks into wafers

We acquire Innovative Manufacturing Process from the first step

Ingots Wafers Cells ModulesSiSCH: What we do – Si Wafer Production

Main Silicon Wafer Characteristics

Crystal

0.5-2.0 Ωcm

Multicrystalline Silicon

Specific resistivity

Minority carrier lifetime ≥1.8 μs

Conduction type P (Boron doped)

Shape of wafer Full Square (Bevel edge corners)

Dimensions 156.0 mm ±0.5 mm

Average thickness 180/ 200 μm ± 20 μm

Advanced Production Processing Technology

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SCH: What we do – Si Wafer Production

DSS Furnaces Wire SawSquarer

Feedstock Recycling Cleaning System Kiln

Strategic co operations with PV leader equipment suppliers

Ingots Wafers Cells ModulesSi


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Feedstock Wet blasting Cleaning System

Grinding, Polishing and Chamfering System

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SCH: What we do – Si Wafer Production Ingots Wafers Cells ModulesSi

DSS Furnaces


DSS Multicrystalline Ingot GrowthHeat (≈4hrs), Melt (≈10hrs)

Growth (≈18hrs)

As growth proceeds, insulation rises and

more molten Si solidifies

Corners freeze last. Annealing steps follow

growth and before cooling

Multicrystalline Ingot

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Multicrystalline Ingot Brick Cutting

Multicrystalline Ingot

Squarer

Multicrystalline Bricks and recyclable material

SiC acts as dispersed cutting media

PEG used as coolant and lubricant agent (apart from

being the dispersion medium)

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Multicrystalline Brick Quality Control, Cropping, Polishing, Chamfering

Reinforces corners and edges reducing risk of corner and bevel defects

Removes surface fractures and damage from squarer

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Wire Sawing, wafer degluing, wafer cleaning

Multicrystalline Si wafer

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Cell Production Capacity: 80MW/yr


Main Silicon Solar Cells Characteristics

Dimensions 156mm x 156mm ±0.5mm

Thickness 180μm ±20μm, 200μm ±20μm

Front (-)

2 busbars (silver aluminium) 2mm wide each Silicon Nitride (SiNx) AR coating

Rear (+) 2 busbars (silver aluminium) 5mm wide each

Multicrystalline Si

Multicrystalline Solar Cells – SCH6P


Maximum Power (Pmax): 4.05 W

SCH: What we do – Si Cell Production

Solar cells SCH6P with average efficiency of 16.0%

We produce high-quality solar cells from high-quality wafers15/10/2010

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Equipment

MetallizationLine

Anti – Reflection Coating

Diffusion Furnace

Laser Isolation

Iso-Texturing Diffusion Furnace

Metallization Line

Firing Furnace

PSG

Laser Isolation


Iso -TexturingPhospate Glass Removal

Firing Furnace

Anti Reflective Coating

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http://www.rena.de/

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Iso-Texturing


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Iso-Texturing

As-cut

post-iso

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N-type dopant diffusion and PSG removal

Diffusion Furnace

PSGPSG layer being removed is only 0.0000003mm in thickness

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Anti- Reflective Coating by PECVD

Anti Reflective Coating

Plasma

Enhanced

Chemical

Vapor

Deposition

Post-AR

Post-iso

01

1

d =4n 1 0 2n = n n

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Metallisation through screen printing

Back (+)

Back

Front (-)

Metallization Line

wafer

Squeegeepaste

Screen Mesh

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Firing, laser edge isolation and cell testing

Firing Furnace

Laser Isolation

Grooving the front surface at the edge of wafer. Close loop. Only after laser cut does wafer become cell

Cell tester assembly

Every single cell is tested and cells then sorted by voltage according to the produced power, sorting cells into bins of the same efficiency class

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Qua

lity

Con

trol

Core Advantages - ResultsProduction Process Standards


Strict Quality Control & Testing standards under an ISO 9001: 2008 certified system

Print Pressure Control metallisation method

Diode characteristics test via reserve current & shunt resistance sorting

Narrow current class & optical sorting

Acidic isotexture & Advanced AR coating deposition process employed

Performance Homogeneity in each delivered lot

Module hot spot occurrence elimination

Stress Reduction

Highest Quality & Reliable performance

High color uniformityExcellent aesthetic resultOptimum Light Absorption

Advanced & High process engineering level In

nova

tion

Ingots Wafers Cells ModulesSiSCH: What we do – Si Cell Production

Micro – crack risk minimization

High quality multicrystalline cells

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Ingots Wafers Cells ModulesSiSCH: What we do – Si Module Production


Glass Washer Inline sheeter Tabber stringer

Module Capacity: 35 MW/yr

Production Technology Empowered by GT Solar

Si: Cheap and abundant compared to other technologies

Multicrystalline silicon:

Most reliable proven technology for photovoltaic applications

Cover the largest contribution in PV electricity production world-wide

Most mature tested semiconductor technology for the production of electricity from solar irradiation

Most suitable for wide range PV installations e.g. large size installations & small size domestic installations

We operate new, state-of-the-art production equipment

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Laminator

Multicrystalline PV Modules – SCH660P

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SCH660P& - Multicrystalline PV Modules

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Durability: extremely long life span & significant economic advantages through maintenance and operating saving

Color Stability: extremely long life span & significant economic advantages through maintenance and operating savings

Aesthetics: large increasing number of gloss and color alternatives & minimization or elimination of color variations

Advanced Product Components for SCH660P PV Modules

Corner cutting: 45 degrees Long side: double wall Short side: double wall Screw holes punched: on long side Punched holes: 4 mounting, 2 grounding, 8 drainage holes Surface treatment: Silver Anodized, Sandblasting (Mat)

Characteristics

Core Advantages

Frame

Stability: in all weather conditions

Handy to install

Better and safer handling

Better drainage of water

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Solar Glass Texture: Prismatic/Matt Iron content: ≤100 ppm Dimensional tolerance: ±2.0mm SPF certification: Class U1 Thermal process: tempered Thickness: 4 ± 0,2mm Dimensions: 1642x981mm

Characteristics

Core AdvantagesDiffuse reflection of the pattern to decrease the light reflection

High solar transmittance at any angle incidenceVery low solar absorbance by the glass itselfNon-toxic chemical composition - Conformity to environmental requirement

Anti-reflective (AR) coating glass with specially-designed coating reflects a very low % of light & ensures higher energy yield

High strength glass and mechanical durability

Maximum transparency and optical clarity

Light transmission factor>91%

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Guarantee of total insulation at high voltages and perfect adhesion to EVA

Excellent resistance to the atmospheric agents, strong barriers to oxygen and humidity

Designed to overcome the shelf life issue giving much more flexibility in production



Backsheet & EVA

Full PET layer structure reassuring no delamination

Thickness: 295 μm

Width: 988 mm

Core Advantages

Backsheet Characteristics EVACharacteristics

3000h of continuous damp hit test

Gel content > 80%

Optical light transmission > 91%

Fast cure process ensuring process stability

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Total protection against contact, protection against penetration of dust

Total protection against ingress of water in case of continuous immersion



Junction Box & Cabling

Bus wire terminals: 4

By-pass diodes: 3

Bus wire terminals: solderless clips

Protection class: II Protection degree: IP 65

Contact resistance: ≤ 5.0 mΩ

Junction Box Characteristics

Reliable and safe throughout the lifetime of the PV Module

Core Advantages

Fast, easy to automate and secure connecting processes inside the junction boxes

Permanently reliable system operationMinimized contact resistance

Core Advantages

Easy Install

Characteristics Cabling

IP68 LC4 Connectors

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SCH660P& - Multicrystalline PV Modules:Designed to satisfy all PV applications


Large-scale PV Systems

Light up your future with Solar Cells Hellas!

PV Module Applications

Grid-connected large-scale PV systems

Grid-connected roof systems / BIPV in cooperation with third party vendors

Roof systems

Stand alone systems

Commercial, industrial, domestic applications

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Mechanical Characteristics

Dimensions 1.649 x 989 x 45 mm (SLT/660P framed)1.642 x 981 mm (SLT/L660P frameless)

Cells 60 poly-crystalline cells 156 x 156 mm (square)

Frame Anodized Al profilesJunction Box 3 bypass diodes, IP65, TÜV&UL

approved, Protection class II

Cabling IP68 LC4 connectors, 1000mm, 4mm2 cables, TÜV&UL approved

Weight (framed)

~21 kg

Weight (frameless)

~18 kg

Solar Glass Tempered, Class U1, SPF certified, matt, prismatic

Modules Characteristics

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Electrical Characteristics*

Nominal Power, Pmax 200W 205W 210W 215W 220W 225W 230WPower Tolerance -2/+3%Open Circuit Voltage, Voc 35.6 V 36.1 V 36.1 V 36.1 V 36.4 V 36.4 V 36.4 VShort Circuit Current, Isc 7.88 A 8.00 A 8.27 A 8.40 A 8.40 A 8.55 A 8.79 AMax Power Voltage, Vmpp 27.3 V 27.4 V 27.4 V 28.0 V 28.0 V 28.0 V 28.2 VMax Power Current, Impp 7.35 A 7.49 A 7.71 A 7.80 A 7.90 A 8.03 A 8.22 AMaximum System Voltage >1000 VDC

Temperature Coefficients Pmpp: -0.43 [%/K]

Voc: -0.35 [%/K]Isc: +0.07 [%/K]

NOCT** 46.1°C

Certifications

IEC EN61215:2005,ed.2* and 61730:2007 part I & II (pending)Application class A (Safety class II) (pending)

Periodic factory inspection (Audit on site) (pending)*Mechanical load test up to 5400Pa

Power Guarantee 12 years (-10%), 25 years (-20%)Product Guarantee 5 years

* measured at STC (Standard Test Conditions: 1000W/m², 25ºC, 1.5AM) ** Nominal Operating Cell Temperature: 800W/m², 20ºC, 1.5AM

Modules Characteristics

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• Potentialities:– PV industry has to reduce operational and material costs:

• Conductive pastes in cell metallization: alternative materials (Cu) or reduce consumption by advanced processes.

• Reduce kerf losses in wire sawing: minimize wire diameter.

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PV potentialities

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• Increase €/W: Improve electrical efficiency of cells/modules by integration of advanced processes and techniques.

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PV potentialities

e.g: selective emitter

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• Increase €/W: Improve electrical efficiency of cells/modules by integration of advanced processes and techniques.

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PV potentialities

e.g: install micro-inverter per module instead of central units

Microinverter per module

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• Future markets:– BIPV: Building-integrated photovoltaics

• Module design based on semi-transparent materials to visible light.• Save amount spent on building materials.

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PV future markets

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PV future markets

Thank you for attention

Open to the future of Energy

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