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A recent report by the Solar ABCs (or Solar America Board for Codes and Standards) contains numerous recommendations affecting the design and installation of ground-mounted alternative energy systems. Among other system components, solar panel fasteners commonly used in residential and commercial systems should provide adequate support and sustain the lifespan of your system, reducing the number of faults and improving efficiency. Grounding is the major factor considered in this report, including the limited amount of listed methods for grounding and the low level of confidence in grounding methods currently used. Fields tests and customer feedback have prompted industry experts to consider these grounding concerns and make recommendations using research findings from the Underwriters Laboratories. Outlining the Recommended Changes to Solar Standards An alarming number of ground-mounted PV system failures have resulted from poor grounding methods. These findings prompted the Solar ABCs to report several recommendations improving the existing solar standards. The main recommendations involve implementation of tests and various procedures to assess grounding in existing and new PV systems. A subcommittee of the STP has been given the job of reworking the language found in the Bonding and Grounding section of the existing standards. This job addresses the same issues outlined in this recent report, and should ensure that all devices designed to protect against over currents are operating properly. Although grounding is the major issued outlined in this report, solar power fasteners were also mentioned, along with changes to the testing done on PV systems in general. Designers, retailers and contractors involved in the alternative energy industry need to consider these recommendations, as they will likely be implemented into the standards over time. Fastener Considerations How are PV system fasteners involved in the grounding? You need to ensure the module frame is properly grounded, and be aware of the implications your choice of fastener has in terms of safety. Since the existing standards are currently being rewritten and updated, test regimes, installation methods and fasteners used in installation can remain unchanged until all of the proposed alterations are completed. In every case the installation recommendations outlined in the PV system packaging should be followed, including the most up to date industry standards. The proper materials should be used on components of the optimum design. Consider how the fasteners attach or mount to frames and mounting systems and the effects of removal or replacement. Although most PV systems are low maintenance by design, maintenance work should not result in declining quality due to weak fasteners or joints. The right tools also need to be used in installation and subsequent maintenance. Torque wrenches ensure that all connections have been properly tightened, resulting in efficient and well grounded systems with fewer faults and reduced danger. All contractors and maintenance staff should be fully trained in the use of these torque wrenches and the application standards need to be readily accessible to all. Using dissimilar metals results in corrosion and decay, both in module framing and solar panel fasteners. This situation can be avoided with accurate and detailed specifications, as well as ensuring your installation contractor follows the manufacturer's instructions closely. Ground mounted solar panel systems continue to gain in popularity across North America and around the world. This recent report outlines the recommendations for installation, ensuring safe, well grounded systems mounted with top quality solar panel fasteners. Follow the details outlined in this report to protect your investment in alternative energy. Mike Moore is published on more than 300 websites. He writes about industrial fasteners and building, commercial building, and home building projects . He is published on various website including http://www.melfast.com
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