The key message of both topics was the overall cost reduction, process optimisation and durability increase potential by adhesive technologies. Bonding of backrails or other mounting devices to modules during module production with the suitable adhesive enables the PV module industry to address these features.
The innovative Sikasil AS?780 combines the exceptional long term performance of a structural Silicone used in the facade industry with the process ability of a high tack and high green?strength adhesive. The initial green strength and strength development is much higher than existing Silicone technologies. This unique product makes it now feasible to bond the mounting devices and handle the assembled parts within the standard production lines and cycles without the need for any large buffer zones or pre?fixation devices. Furthermore the appearing tolerances between modules and mounting device can easily be compensated by the paste like adhesive and the applied bead geometry.
At the same time the Sikasil AS?780 meets the requirements of the most severe structural glazing standard for façades, the EOTA ETAG 002. This standard is concluded with the expectations of a lifetime of at least 25 years on the tested system. This means the bond will last for decades under harsh environmental outdoor conditions with UV, rain and heat as well as under loads from wind and snow with the corresponding joint geometry. Benefits with bonded mounting systems with Sikasil AS?780 include:
– Savings in material and labour of up to 25% compared to common framing and mechanical installation systems
– Reduction in installation time by up to 40% – Elimination of pre?fixation means or large buffer zones
– Simplified in?line bonding feasible with existing cycle times
– Savings in backrail material of up to 15% compared to tape solutions
– Reduced glass breakage by elimination of stress peaks
– Simplified tolerance compensation compared to tape solutions
– Minimised micro?cracks on cells due to stress distribution reflects higher performance over the years – Easier quality control consistency in production compared to the field
– Structurally bonded with an adhesive technology which meets severe façade standards
– Value adding by mounting integration, new designs for BIPV and architectural Appeal.
