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SOLAR AWARDS
PV Application Award
Coveme SpA Enerize Corporation
wavelength range of the spectrum, high
transparency of the polymeric coating in
dyMat PYE Backsheet Material Polymer Encapsulation and the UV range compared to that of glass,
Protective Coating Material and the capability to be formed with a
dyMat PYE backsheet material is used to relief or “crinkle coat” surface
prevent electrical hazards and to grant The Enerize Corporations design for morphology. This surface morphology
high vapour barrier, avoiding power loss photovoltaic (PV) modules using a more efficiently captures photons over a
during the expected lifetime of the solar proprietary transparent polymer material wider angle of incidence. The polymer’s
module. Coveme, in co-operation with claims to substantially out perform the low reflectance as compared to glass,
DuPont Teijin Films, has developed a high glass conventionally used as a protective and the elimination of the interior surface
grade PET inner layer with a lifetime five covering. The proprietary polymer interface, both result in reduced photon
times longer than traditional polyester. material from Enerize is highly loss through reflection.
transparent, and stable under UV and
Traditional solutions are multiple layer ionizing radiation exposure. Additional advantages include reduced
backsheets with fluoropolymers on the air The highly transparent polymer material weight, increased resistance to
side, polyester (PET) in the middle, and a can be applied directly to the PV module degradation by UV and ionizing radiation
third layer towards the cell side. Most of surface at low temperatures, eliminating (so-called photon degradation) and high
the job is done by the polyester film that the need for the adhesives required with mechanical strength. These polymer
must be protected by an outer layer glass and some other polymers. This coated PV modules are stable under
25
versus the air side. eliminates the multi-layer structure prolonged exposure to high and low
including the reflective surfaces present temperatures, thermal-cycling,
www
If there is water permeation of the outer with glass. No glass is used with this mechanical impact, and high relative
.solar
layer, the inner PET layer suffers from polymer coating. The polymer can be humidity. Evaluation of the new Enerize
hydrolysis losing its original properties. formed as a flat smooth surface or as a polymer encapsulation materials has
-pv-management.com
Traditional backsheets can prove “crinkle coat”. The “crinkle coat” version been carried out using PV modules that
unbalanced, having a long lasting outer further enhances photon collection include up to 5 solar cells with a surface
layer and the inner layer suffering from efficiency due to the light concentrating area of 72 cm2 each.Enerize transparent
early aging. This is only visible through effect of the polymer material and its polymer materials and coating
deeper analysis. surface morphology. technologies can be used to improve
conversion efficiencies and overall
The problem analysis shows that In conventional designs using glass, the performance of mono-crystalline, multi-
Issue III 2009
improving the hydrolysis resistance of efficiency of the PV module can be crystalline, amorphous
polyester is the key for a superior decreased by 7% or more as compared silicon photovoltaic and non-silicon based
performing backsheet. The outer layer on with a PV module without a glass PV modules such as CIGS (copper
the airside consists in a white opaque film covering. When PV modules are coated indium gallium selenide).
developed to resist the environment and with Enerize polymer encapsulation and
further protect the inner PET layer. protective coating materials a unique
result is achieved; namely, conversion
The dyMat PYE laminate is based on efficiency is increased as compared with
Mecasolar
two layers of polyester film. The cell side the same PV module having no covering. MS Tracker 10
is treated with a special thick primer Compared to PV modules laminated with
which provides high bonding capability glass, those coated with Enerize polymer Mecasolar design, manufacture and
to EVA. coating materials exhibit an increase in distribute dual axis, azimuth and vertical
efficiency of as much as 25% or more. solar trackers, such as MS Tracker 10 in
The primer can be supplied in different For example, as compared to a PV its two versions MS Tracker 10 and MS
colours and in transparent finishing. The module laminated with glass having an Tracker 10 +. The trackers come with a
laminate thickness has been designed to efficiency of 16.45%, a PV module with 10-year guarantee on parts,workmanship
provide the best combination of the same type of solar cells coated with and displacement. The MS TRACKER 10
properties in terms of electrical insulation Enerize polymer material has an efficiency and 10 PLUS trackers perform solar
and weather ware and tear. of 21.2%. This increased efficiency is due tracking through astronomical
It also forms a strong barrier to oxygen to several important features including programming. The PLC incorporated into
and humidity. better utilization of light in the shorter (UV) the system controls actuation of the two
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