Fronius Rapid Shutdown Box

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Rapid Shutdown Box

This new low-profile version of the Fronius Rapid Shutdown Box (RSB) offers an ideal solution for NEC 2014 (690.12) and NEC 2017 (Array Disconnect) compliance, while enhancing overall rooftop and firefighter safety. Low-profile design, installer-friendly mounting and wiring, makes the DUO and QUATTRO Fronius Rapid Shutdown Boxes the ultimate solution for all Fronius SnapINverters in systems up to 600 V. Directly connected to the inverter through the same conduit as the DC homeruns and powered by the array, the Fronius solution minimizes the number of components and eliminates the need for an external power supply. 

The low-profile design allows for installation underneath the modules, ensuring a clean system look. With a NEMA 4X enclosure, the box is built for severe outdoor conditions. MC4 connectors, spring loaded terminals and generous wiring space make wiring our new generation Rapid Shutdown Box even easier. Rapid Shutdown is triggered when AC is not present at the inverter, rapidly discharging the DC lines to the inverter. This allows for a seamless, code compliant solution to the NEC requirement for rapid shutdown functionality for solar power systems on buildings.


  • Two boxes available - for 2 string or 4 string operation
  • Low-profile design fits neatly underneath the module for a clean system look
  • Comes with mounting bracket that allows for multiple mounting options
  • DC Powered by the array
  • NEMA 4X Metal Enclosure - to sustain severe environmental elements
  • Replaces junction box, minimizing overall system cost
  • Temperature range - -40° to 149 ° F
  • Max voltage- 600VDC
  • UL1741:2010, FCC Part 15 Class B


Fronius Rapid Shutdown DUO QUATTRO

Fronius DUO Configuration

Fronius QUATTRO Configuration


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