Installation Guide

Introduction
900-0236-01-00 Rev A 9
Functions
Rapid Shutdown
The rapid shutdown requirement is intended for firefighters or first responders. In an
emergency, a responder may need to set the PV system in a “safe” (de-energized) state
according to NEC 690.12.
For this reason, the RSI is required to be mounted close to the main utility meter. The RSI
must be easily visible.
The RSI includes a Rapid Shutdown switch that initiates a disconnection of all elements of
the PV system. Opening this switch sends a signal to all combiners to open the main contactor
on each.
Opening this switch also sends a signal to the SkyBox, ordering it to open its contacts.
According to NEC 690.12, the rapid shutdown must reduce the DC circuit to less than 30 Vdc
and 240 VA within ten seconds of initiation.
Rapid Shutdown Self-Test
The rapid shutdown should be tested every six months. This test should be performed as
described in the
Verification
section.
Verification
Turning the Rapid Shutdown switch to the right (clockwise) puts it in the OFF position. The
S
OLAR
O
FF
LED indicator will illuminate upon successful shutdown. If this does not occur, see
the
Troubleshooting
section on page 15.
PV Combiner Disconnect
Each combiner has a PV Combiner Disconnect switch which is used to turn off a particular
array. This is used if the array or circuit needs to be serviced. The switch can be padlocked in
the OFF position as a “lockout/tagout” procedure to prevent a shock hazard.