• Module Level Rapid Shutdown
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A most cost efficiency RSD solution for two solar modules

BFS-11 is a UL1741 listed module level rapid shutdown device for solar building fire safety, inherently compliant with NEC 2014, NEC2017 and 690.12 rapid shutdown requirements.
(BFS-11 RSD is suitable for panel <40V)

The emergency button switch is required to initiate the rapid shutdown function, completes the solution.

How the solution works?

Each BFS-11 device operates two solar modules (<40V), the modules in series go to inverter sting as usual.
The communication signaling cables connect the BFS-11 in series and go to the button switch complete the RSD solution.

Which is the most reliable communication, ensure the PV system has RSD function in decades and the panel can be switched off to a safe voltage level in case of emergency at the lowest power consumption.

Simply and reliable MLPE for all string inverters and panels

*Automatic shutdown the panels when there is a temperature in the area higher than 85°C detected.

*Automatic shutdown the panels when the power supply loss in the button switch box.

*The fireman and people can manual the button switch to shutdown the panels when there is an emergency.

How to satisfy the NEC2017 690.12 about rapid shutdown?

The 2017 National Electric Code (NEC) requires the solar PV installations on or in buildings to have a module level rapid shutdown function in case of emergency.

And the initiation device(s) shall initiate the rapid shutdown function of the PV system.
The device “off” position shall indicate that the rapid shutdown function has been initiated for all PV systems connected to that device. An initiation device(s) shall be located at a readily accessible location outside the building.

The solar installers and owners need a reliable and durable RSD solution can keep function during the whole PV panels' decades lifetime, a simply RSD solution with emergency button switch as one of the initiation devices.