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XeroCoat launches single-layer low-refractive index coating boosting module power conversion
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Product Briefing Outline: XeroCoat Technology has entered the solar energymarket targeting the solar thermal and solar photovoltaic segments with its antireflective coatings. The XeroCoat antireflective coatings are claimed increase conversion efficiency and, consequently, the power output of solar systems, while being of low cost.
Problem: Photovoltaic modules suffer from reduced conversion efficiency even before the sun’s light reaches the solar cells. This is because the solar module’s protective cover glass reflects some of the incident light. For typical glass panels, depending on the time of day, 4% to 15% and more of the incoming light is lost from reflections and, thus, is not available to generate electricity. Applying an
anti-reflective coating to the cover glass of the module will reduce these reflections and increase the module’s output power. Current commercial PV technologies convert 10%-20% of the incoming light to electricity. The same module with a suitable anti-reflective coating can deliver an additional 0.3%-0.6% power conversion. A product achieving higher conversion efficiency in a cost-effective
manner can make solar modules more affordable.
Solution: By using the XeroCoat antireflective coating on a photovoltaic module, the solar energy reaching the solar cells is claimed to increase by as much as 3% at noon and by as much as 6% at early morning and evening hours. Module makers can expect a 3% increase in power output on
a peak watt (Wp) basis, and a 4% increase in energy produced on a kilowatt-hour (kWhr) basis, resulting in the equivalent of a solar cell efficiency gain of approximately 0.5-0.75% points, without modification.
Applications: Applicable across all solar energy technologies including crystalline, thin film, concentrating solar thermal
Platform: Uses non-toxic, recyclable coating materials and a low energymanufacturing process. Meets IEC 61215 module test standards and exceeds current industry standards for abrasion resistance.
Availability: July 2008 onwards.
