ABB offers a unique configuration that ensures design flexibility and compliance with 2014 & 2017 NEC 690.12 requirements. The robust energy production of a single-phase string inverter, the rapid shutdown function and an optimizer option provides installers a stronger solution to code compliant solar installations.
“Finding inverters that can perform under the demands of challenging roof configurations and comply with the latest code requirements can be difficult,” said Mario Thomas, string inverter product manager, ABB’s Solar business in the US. “With these new code compliant options from ABB, installers have more options to choose from.”
The UNO-DM-PLUS-US family of single phase, solar inverters delivers high performance with excellent power density giving end users the maximum amount of energy production. This flexible inverter comes with embedded connectivity and an efficient communication protocol, which enables the UNO-DM-PLUS-US to be easily integrated 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 upgrade for inverter and components to enable remote software upgrades.
For jurisdictions that have not migrated to 2017 NEC 690.12, ABB’s string-level Rapid Shutdown 2.0 device provides a simple and cost-effective solution to implement. This product mounts directly to the PV mounting rail or PV module, and lay parallel to the roofing surface. It provides a fail-safe solution for emergency responders. Available in two configurations (single and dual), this rapid shutdown device requires no extra conduit, which minimizes additional material cost and associated labor. Shutdown occurs at the rooftop box when the utility power is lost or when the PV system’s AC disconnect switch is opened.
The Underwriters Laboratories (UL) certified third-party solutions offer Rapid Shutdown and optional MLPE configuration with string inverter power generation as well as the following advantages:
Once the inverter is installed, operators can turn to a smartphone to commission the unit via a simple, built-in web user interface. This enables them to gain access to features such as advanced inverter con-figuration settings and Aurora Manager, which facilitates OTA firmware updates (remote software up-dates).
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