The Latest Process for Solar Cell Interconnection

SmartWire Technology (SWT) is a revolutionary cell connection process for solar module manufacturing. Standard busbars are replaced by 18 micro-wires that gather energy more fluently and strengthen the cells. SWT’s superior performance results in advanced module efficiency while negative effects are significantly reduced.

WE DELIVER THE LATEST TECHNOLOGY

TO POWER THE WORLD

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FOIL-WIRE ELECTRICAL CONDUCTOR

The 18 micro-wires are robotically positioned in parallel and held in place by a transparent foil

in an over/under pattern. This foil-wire assembly (FWA) forms the electrical conductor, designed

with surgical precision, to interconnect the solar cells and eliminate the need of busbars.

Micro-wires

Film

LONG-TERM PERFORMANCE TECHNOLOGY

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AUTOMATED CELL CONNECTION

The solar cells are linked robotically with the FWA to form a cell string, eliminating the busbar to cell soldering process. The FWA interconnects the front side of a cell to the back side of the next cell, ensuring the proper connection from cell to cell.

Busbar-less cell

FWA

VIRTUALLY FREE OF MECHANICAL STRESS

BY ELIMINATING CELL SOLDERING

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MATRIX CREATION & LAYOUT

A 60 cell solar matrix is created by alternating 6 strings of 10 cells. The matrix is covered with encapsulant then placed between a sheet of glass and a backsheet.

(Anti-reflective tempered) GLASS

(Natural water repellent) TPO

(60 Solar cells) MATRIX

(Natural water repellent) TPO

(Aluminum & Polyolefin) BACKSHEET

NO MANUAL SOLDERING  FOR CELLS INTERCONNECTION

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LAMINATION AND ELECTRICAL CONTACT

In order to protect the cell matrix from environmental influences, the individual layers are bonded together by vacuum pressure and heat, to form an ultra durable solar laminate. This lamination process also forms the electrical connections between the wires and the cell.

Glass

TPO

TPO

Micro-Wires

BackSheet

Electrical contact

point with the

cell metalization

LOW TEMPERATURE BOND

The SmartWire to cell connection points are bonded at a lower temperature than the busbar soldering process. As a result, SWT induces less thermo-mechanical stress on the solar cell, significantly reducing the cell brittleness associated in busbar technology.

140°C

230°C

Lamination

Soldering

KEY TECHNOLOGY FOR

HIGH EFFICIENCY SOLAR CELLS

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ADVANCED ENERGY COLLECTION

The superior efficiency of SWT is driven by 18 micro-wires that form a dense grid of up to 2,660 contact points on the solar cell. This structure allows electrons to travel a shorter distance in order to be collected, thus reducing resistive losses.

BUSBARS

Lower Resistance = More Electricity

Higher Resistance = Less Electricity

The lower resistance enables the extraction of more power from each individual finger, thereby increasing the power density when compared to traditional busbar panels.

OPTIMIZING THE ENERGY COLLECTION

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REDIRECTING LIGHT

The round shape of the micro-wire introduces a light trapping effect which reduces the shading by 25% compared to busbar technology.

BUSBAR

THE NEW LEVEL OF EFFICIENCY

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MINIMIZING MICRO-CRACK EFFECTS

Micro-cracks have a minimum effect on modules with SmartWire, since the FWA acts as a protective layer for the solar cell with the dense grid of up to 2,660 contact points. Even a

micro-cracked cell remains contacted, maintaining the energy collection at high levels.

Busbar

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