PV Backsheets
from
Hanita Coatings
Avi Amar – Hanita Coatings
Energy Efficiency Division 2012
Why should you choose
Hanita?
Hanita Coatings offers 30 years’ expertise developing
engineered polymeric films
Established – 1982
HQ, R&D and manufacturing in Western Galilee, Israel
Ownership –
•
•
75% Kibbutz Hanita
25% Tene Investments
180 staff, 7 overseas sales offices
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Hanita’s global reach ensures short lead-times and
outstanding local service
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State-of-the art coating and laminating facilities provide
innovative technological solutions
Four coating lines 1.6-2.1m wide, 0.7m pilot production
line, clean room – Class 100,000
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Technology break-throughs in the field of metallizing
enable us to provide world-leading levels of barrier
Two vacuum roll coaters, 2.1m, 2.3m wide, proprietary
deposition of Al, Cu, and other metals, alloys and oxides
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Recent CAPEX investments of $15m provide the
cutting edge of technology
Six slitter-rewinders with width capacity from
5mm – 2100mm, Clean room – Class 10,000
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We offer a unique range of capabilities and processes
under one roof
Deposition & Metallizing Technology
Coating & Laminating Technology
Technology
Print Primers
Adhesives
Barrier Coatings
Abrasion Resistant Coatings
Nano Coatings
Ultra Violet Reduction Atmospheric
Plasma
Optical Density 0.2-5
Enhanced Metal Adhesion
Reactive Depositions
Clear Barrier
R&D
Engineered Films
Markets
Energy Efficiency Solutions
Industrial & Graphics
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With all production in one site, we can guarantee total
quality control
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A fully equipped testing lab ensures all products are
rigorously tested for durability & performance
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All backsheets we develop are rigorously tested as
complete modules by external laboratory
Before and
after
exposure
tests
Dry/Wet Hi Pot
insulation test
Thermal cycling
testing
Damp heat test @
Lamination testing
200 cycles
• 1000 hours
• 2000 hours
• 3000 hours
• Inner layer
• Encapsulant adhesion
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Our products combine the finest raw materials from
leading manufactures
EVA
Films
Ultra-white patent
pending EVA layer
gives high VIS light
reflectance (higher
output power from
the module) + good
adhesion to EVA
encapsulant.
PET
Films
Fluoropolymeric Films
Selected to provide
the required
electrical insulation
and mechanical
strength.
Arkema Kynar® films
give outstanding
protection from
weathering
Fluoropolymeric
coatings
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In-house coating
development cost
effectively provides
the weatherability
levels of FP films
Hanita Coatings’ strengths ensure we
can challenge the market leaders
R&D - Custom
Development
• Advanced film
converting facility
• Deep specialization
in durable coatings
30 years’
expertise
• 12% workforce
R&D dedicated
• ISO 9001:2008
• Fully equipped
Test lab
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• Distribution
centers worldwide
Global
Reach
Why choose DuraShield
backsheet products?
Look what can happen if you use the wrong
backsheet…
Corrosion in connections caused by
cracks in backsheet
Delamination of BS after 3 years
exposure in Germany
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All DuraShield backsheets provide high physical
protection, electrical insulation & the right appearance
Physical protection
Increased efficiency
in some applications
Enabling a
25 year outdoor
PV module lifespan
Right appearance
Electrical insulation
Moisture protection
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Hanita produces four types of backsheets (BS)
for the leading PV technologies
DuraShield
KPE
DuraShield
CPE
DuraShield
KAPE
DuraShield
Back
Contact
Fluoropolymer laminate BS, for c-Si modules
High durability FP coated laminate BS, for c-Si modules
Low weight, high barrier BS solution for Thin Film technologies
Electrical circuit backsheet for Back Contact (EWT/MWT) technologies
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DuraShield KPE’s classic FP film construction delivers
enhanced long-term performance for c-Si modules
DuraShield KPE
K = Kynar® PVDF Fluoropolymeric film
P = Polyester film
E = EVA
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DuraShield KPE is a proven technology targeting
traditional module manufacturers
Cost
Effective
Economical alternative to PVF constructions
Enhanced
Reflectivity
Excellent
Durability
Exceptionally white EVA layer
Long term weatherability retains bright whiteness
and reflectivity
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DuraShield KPE is TUV certified for >1000VDC and UL
IEC 61730-2:2004
Maximum permissible
System voltage
1053 VDC
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DuraShield KPE easily withstands
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DuraShield CPE replaces the Kynar FP film laminate
with an equally durable Fluoropolymeric coating
DuraShield
CPE
Cost
Effective
C = Coating of Fluoropolymer
P = Polyester film
E = EVA
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The DuraShield CPE solution delivers a price advantage
without compromising performance
EVA
PET
Patent pending ultra-white EVA
layer gives high VIS light
reflectance (higher output power
from the module) + good
adhesion to EVA encapsulant.
Provides electrical
insulation and
mechanical strength.
Protected by
Fluoropolymer layer.
Fluoropolymer
Coating
Gives protection from
weathering, cost
effectively.
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DuraShield KPE gained TUV & UL approval. So did the
competitors. Look what happened after 2000 hours…
Competitor Backsheet
∆E = 4.4
DuraShield KPE
∆E = 2.0
Market leading competitor’s backsheet yellows drastically
after aging test of 2000 hours of damp heat.
DuraShield KPE is more reflective and more effective than the
competitor’s leading product.
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DuraShield KPE and CPE show outstanding long term
EVA encapsulant peel strength
120
100
DuraShield DuraShield
KPE
CPE
N/cm
80
60
40
20
– FP coating
0
0hrs
1000hrs
2000hrs
Damp
Heat
hours
KPK
KPE
FPE
CPE
PPE
Damp
Heat
Test
3000hrs
– PET based
– FP film x2
– DuraShield CPE
Damp heat: 85 OC 85% RH
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– DuraShield KPE
DuraShield’s ultra-white EVA shows exceptional
initial cell-side reflectance
85
DuraShield
KPE
84
83
82
DuraShield
CPE
%R
81
80
79
78
77
– FP coating
76
– PET based
75
400
450
FPE
500
550
PPE
600
Wavelength (nm)
KPE
650
700
KPK
750
800
CPE
DuraShield KPE visible light reflectance (550nm): 84.4%
DuraShield CPE visible light reflectance (550nm): 84.1%
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– FP film x2
– DuraShield CPE
– DuraShield KPE
UV exposure up to 3000 hours shows exceptional
performance by DuraShield KPE & CPE @ cell side
DuraShield
CPE
Delta E
8
7
6
5
4
3
2
1
0
DuraShield
KPE
– FP coating
– PET based
1000hrs
2000hrs
QUV hours
3000hrs
Test cycle: 20h UV-A (0.93W/sq.m,@340nm) + 75°C ; 4h dark + 50°C + condensation
– FP film x2
– DuraShield CPE
– DuraShield KPE
DuraShield KPE and CPE both demonstrate excellent
color stability – ΔE vs. QUV hours @ back side
2.50
2.00
ΔE
1.50
DuraShield
KPE
DuraShield
CPE
1.00
0.50
– FP coating
0.00
1000hrs
2000hrs
QUV (hrs)
KPK
KPE
FPE
CPE
3000hrs
PPE
Test cycle: 20h UV-A (0.93W/sq.m,@340nm) + 75°C ; 4h dark + 50°C + condensation
According to relevant data, 1 year in Florida direct sunshine is ~956 hours in these test
conditions. Backside not directly exposed to sunlight, it will typically see ~15-20% from direct
light. Taking this factor into account, ~5000 hours safely simulate 25 years
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– PET based
– FP film x2
– DuraShield CPE
– DuraShield KPE
DuraShield KPE and CPE retain their initial levels of gloss
(60°) for 3000 hours virtually without change
Gloss Retention (60° Gloss)
120
DuraShield
KPE
100
80
DuraShield
CPE
60
40
20
– FP coating
0
0
500
KPK
1000
KPE
1500
2000
QUV Hours
FPE
2500
3000
3500
– PET based
– FP film x2
PPE
CPE
Test cycle: 20h UV-A (0.93W/sq.m,@340nm) + 75°C ; 4h dark + 50°C + condensation
– DuraShield CPE
– DuraShield KPE
Hanita has developed backsheets for
alternative & promising PV technologies
DuraShield
DuraShield
Back KAPE
Contact
Low weight, high barrier BS solution for Thin Film technologies
Electrical circuit BS for Back Contact/MWT technology
DuraShield
Back Contact
Electrical circuit BS for Back Contact (EWT/MWT) technologies
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DuraShield KAPE delivers the high moisture and
oxygen barrier demanded by thin film modules
DuraShield KAPE
K = Kynar® black PVDF Fluoropolymeric film
A = Aluminum
P = Polyester film
E = Black EVA
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DuraShield KAPE is TUV certified for >1000VDC
Maximum permissible
system voltage
1092 VDC
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Back Contact breakthrough technology improves cell
module power output distribution
Back contact technology provides
• Higher output power
• Lower manufacturing costs
• No stringing/bus-bars
• Attractive appearance
DuraShield Back Contact foil innovation enables
greater efficiency at reduced cost
DuraShield Back Contact
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DuraShield Back Contact foil innovation enables greater
efficiency at reduced cost
DuraShield Back Contact
Innovation
Compatibility
Performance
Patent pending technology replaces
expensive 36µ copper foil with
Aluminum conductive layer
Compatible with all existing
conductive adhesives and solder
pastes
Achieves the optimal fill factor by
using highly conductive layers
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Our specialty is customized backsheet development,
providing the solution to your specific product challenge
Problem: LCPV low
concentrated PV
modules suffer
accelerated module
degradation
Goal: Improve
weatherability
Solution:
Engineering
EVA to
enhance UV
resistance
Problem:
unconventional
encapsulant material
Goal: improve affinity
to BS
Solution:
Engineering of BS
surface by primer or
co-ex development,
or by replacing EVA
with alternative
film.
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So how can Hanita help you solve your
product challenge?
R&D - Custom
Development
• Advanced film
converting facility
• Deep specialization
in durable coatings
30 years’
expertise
• 12% workforce
R&D dedicated
• ISO 9001:2008
• Fully equipped
Test lab
W hy H a nita B ack she e ts: K PE C PE K A PE B ack - C ontact C ustom
• Distribution
centers worldwide
Global
Reach
Thank you!
pv@hanitacoatings.com