Solar Builder

MAY-JUN 2018

Solar Builder focuses on the installation/construction of solar PV systems. We cover the latest PV technology (modules, mounting, inverters, storage, BOS) and equip installers/contractors with tips and tools to make informed purchasing decisions.

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F ollowing the new SunSpec communication protocol, ABB is offering a new configu- ration that ensures design flexibility and compliance with 2014 and 2017 NEC 690.12 requirements via a single-phase string invert- er and an optimizer option. The UNO-DM- PLUS-US family of single -hase solar inverters comes with embedded connectiv- ity and an efficient com- munication protocol that enables easy integration within any current or future device for smart building automation, smart grid integration and with third-party monitoring and control systems. The UNO-DM-PLUS-US also comes with remote over-the-air (OTA) firmware upgrades to enable remote software updates. In conjunction, ABB and Tigo formed an operational compatibility between ABB's inverter line UNO-DM-PLUS and Tigo's TS4 optimizer platform. The com- bined ABB and Tigo module solution is now available. For jurisdictions that have not migrated to 2017 NEC 690.12, ABB's string-level Rapid Shutdown 2.0 is avail- able to mount directly to the PV mounting rail or PV module and lay parallel to the roofing surface. Available in two configura- tions (single and dual), this rapid shutdown device requires no extra conduit, which minimizes additional material cost and associated labor. Advantages of this system The Underwriters Laboratories (UL) certified third-party solutions offer Rapid Shutdown and optional MLPE configura- tion with string inverter power generation as well as the following advantages: Module-level monitoring. Predicting and conducting maintenance on solar installations is critical to ensure that they last beyond their expected 25-year lifetime. With full visibility of a system's perfor- mance through module-level monitoring in two-second increments, solar fleets can maximize system up-time, identify perfor- mance issues, and control operations and maintenance (O&M) costs. Safety. The UL-certified module-level rapid shutdown solutions provide installers, EPCs and PV plant owners the most cost- effective response to safety regulations like the National Electric Code (NEC) 2014 and 2017 requirements. For installations unencumbered by shading, the MLPE option provides the necessary safety and monitoring services to ensure systems meet local fire regulations and performance expectations. Optimization of energy harvest. With optimized modules, more roof space can be used to maximize energy production. This fixes module mismatch and increases design flexibility by optimizing each mod- ule when shade drops their performance. It addresses system-level inefficiencies and age tolerance while also benefiting from the module-level monitoring and safety features. Chris Crowell is the managing editor of Solar Builder. 20 M AY / J U N E 2 0 1 8 BOS NEW IN ABB Offers New Code-Compliant Inverters For Residential installs

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