Fronius USA has released the Fronius Rapid Shutdown Box for compliance with the latest NEC 2014 code requirement of rapid shutdown.
The Fronius Rapid Shutdown Box is designed for use with all of the company's single-phase SnapINverters from 1.5 kW to 8.2 kW. The system connects directly to the inverter through the same DC conduit as the DC homeruns.
Fronius says no extra power supply or ground-level hardware needed. The rapid shutdown function is triggered whenever AC is not present and the DC lines are rapidly discharged by the inverter.