PV PROCESSEQUIPMENT
Ultrasonic Technology www.ultrasonictech.com
Resonance Ultrasonic Vibrations Technique
The Resonance Ultrasonic Vibrations (RUV) technique was developed for off-line and in-line non-destructive crack detection in full-size silicon wafers and solar cells. The RUV methodology relies on deviation of the resonance frequency response curve measured on a wafer with peripheral or bulk millimeter-length crack and on identical non-cracked wafers. The silicon wafer is a large contributor to the overall cost of the solar cell. Solar Si wafers are sliced thinner with thicknesses down to 150-200 microns. Wafer areas have also been increased to reduce overall production costs.
These technological trends make wafer handling in production more challenging and reduce the yield of solar cell lines due to increased wafer and cell breakage. In-line wafer breakage also reduces equipment throughput as a result of down time. The RUV technology allows (1) rejection of mechanically unstable Si wafers after ingot cutting before they are introduced into further
SMA Solar Technology AG www.SMA.de
SMA Solar Technology AG, based in Niestetal/Germany and with eleven international subsidiaries on four continents, develops and sells solar inverters, central components of every PV system. SMA has more than 3,000 employees currently and generated more than 680 million euros in sales in 2008.
The company has been listed on the Frankfurt Stock Exchange Prime Standard (S92) since June 27, 2008; since September 22, 2008 SMA's shares have been listed on the TecDAX.
SMA is worldwide the only manufacturer to supply state-of-the-art solar inverters for grid- connected and stand-alone solar installations - regardless of the type of solar module or the plant capacity.
Name of the new product, product range or service: Sunny Boy 3000HF Sunny Tripower 10000TL, 12000TL, 15000TL, 17000TL Wireless Bluetooth® communication
SMA Solar Technology AG is offering a variety of innovations at the 24th European Photovoltaic Solar Energy Conference and Exhibition. Among these innovations is Sunny Boy 3000HF, a new generation of galvanically isolated inverters.
Packed full of the latest SMA technology, the device provides the highest yields for transformer inverters of this power class. Thanks to the new DC connector system SUNCLIX, the plug-in generator grounding (optional) and an easily accessible
cell processing, (2) identification of wafers with mechanical defects (such as cracks) during production to avoid their in-line breakage, (3) detection of cracked cells before they will be laminated into modules to avoid panel efficiency reduction and product return from the field. The sensitivity of the system, which refers to the length of the cracks, is adjustable to the needs of the user.
The rejecting method is based on a statistical approach. In case studies the accuracy of this method was between 91 - 95%. That means that after RUV inspection the breakage caused by cracked wafers or cells is reduced by at least a factor of 10.
Fully automatic In-line, Off-line and Quality Control Tools are currently available for cell and module production. For more information and an offer, please contact Ultrasonic Technologies web-site.
Inverters
configuration area the installation is now even easier. The wide input voltage range from 175 to 700 Volt offers extraordinary flexibility for your system design. Finally, the modern graphic display and wireless Bluetooth® communication make the Sunny Boy 3000HF highly user-friendly.
The new Sunny Tripower 10000TL, 12000TL, 15000TL and 17000TL are packed with state- of-the-art technology and stand for flexible and safe system design. Thanks to their multi- string technology and the widest input voltage range, the new three-phase inverters are suitable for every module configuration. In addition, technologies such as OptiCool, OptiTrac and a maximum efficiency of 98 % guarantee the highest yields. Sunny Tripower inverters fulfill the German BDEW guideline (medium voltage guideline) and, in so doing, they participate in a reliable grid management.
A novelty in the Monitoring Systems segment: Sunny Beam with Bluetooth®. The elegant table top device is the ideal communication solution for operators of smaller roof-mounted systems: no installation costs, easy to operate and award- winning design. Via Bluetooth connection, it records the most important system data of up to twelve inverters which the operator can visualize on the large graphic display at any time.
The data is stored for at least 100 days in the device, but can also be transmitted to a computer using an USB connection. Both the optical and the acoustic alarm offer additional protection against yield losses, if requested.
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www.solar-pv-management.com Issue II 2010
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