Fronius Rapid Shutdown Box DUO

For CEC 64-218 Rapid Shutdown compliance on solar rooftop installations in Canada.
The easy installation of a Fronius Rapid Shutdown Box provides the ultimate solution for Fronius’s Primo and some Symo (600Vdc limit) inverters.

The Fronius RSD box can accommodate up to two strings in parallel. Please use Staubli MC4 Y-Connectors to connect. The Fronius Duo Rapid shutdown box has a very low DC startup voltage. This allows the RSD box to be used even in Off-Grid system together with charge controllers to achieve RSD code compliance or even in conjunction with  other conventional string inverter brands.

The RSD box shutdown can be triggered by the integrated signal relay in Fronius Primo and Symo inverter product lines or alternatively with a manual switch that interrupts the two-wire communication line. For the Province of Alberta and some other jurisdictions, an additional RSD initiator switch can be located on the roof, if the roof is accessible and will require a secondary means of rapid shutdown initiazation in more than one location. Speak to one for our solar experts how your system can be made code compliant and cost optimized.

The low-profile design allows for installation underneath the modules, ensuring a clean system look. Thanks to the NEMA 4X rating, the box is built for severe outdoor conditions. MC4 connectors, spring loaded terminals and generous wiring space make wiring easy. Rapid Shutdown is triggered when AC is not present at the inverter, rapidly discharging the DC lines to the inverter. An optional method is to install an emergency stop button to open the signal loop.