Generac Power Systems S2502 Installation Manual page 17

Section 4: PVRSS Compliance
2011 NEC and Older Editions
2011 NEC and older editions do not require PVRSS
compliance.
NOTE: The PV Link will still provide 2014 NEC compliant
PV Rapid Shutdown.
2014 NEC
The 2014 NEC 690.12 introduced a new requirement for
PV systems that is commonly referred to as PV Rapid
Shutdown. To meet 2014 NEC compliance:
1. Install the PWRcell Inverter as specified in the Gen-
erac PWRcell Inverter Installation Manual and
Owner's Manual.
2. Install the PV Link as specified in this manual.
3. Install a PVRSS initiator.
• The DC disconnect under the PWRcell Inver-
ter front cover labeled PV by the installer can
be used as the PVRSS initiation device. See
PV Rapid
PWRcell Inverter Installation and Owner's
Manual for more information.
• An external actuator, connected by the instal-
ler to the PWRcell Inverter's STOP terminals
can be used as the PVRSS initiation device.
If the PWRcell system includes PWRcell Bat-
tery/ies, the battery/ies must have a battery
management unit (BMU) with STOP terminal
hardware. See Generac PWRcell Battery
Installation and Owner's Manual for in-
structions. Appropriate signage, in compli-
ance with the NEC, must be provided by the
installer indicating the function of the external
actuator.
Rapid shutdown response time is less than 10 seconds.
Installation Manual for PV Link and SnapRS Installation Manual
Shutdown in the Generac
2017 NEC (and forward)
The 2017, 2020, and 2023 NEC have PVRSS require-
ments mandating the need to reduce voltages of con-
trolled conductors to less than 80 VDC within the array,
and less than 30 VDC outside the array, as well as some
specification for the location of the PVRSS initiator and its
labeling.
To meet 2017, 2020, and 2023 compliance:
1. A PVRSS initiator must be located at a readily ac-
cessible location outside the building.
• The DC disconnects under the PWRcell In-
verter front cover labeled PV by the installer
can be used as the PVRSS initiation device.
• An external actuator, connected by the instal-
ler to the PWRcell Inverter's STOP terminals
can be used as the PVRSS initiation device.
If the PWRcell system includes PWRcell Bat-
tery/ies, the battery/ies must have a battery
management unit (BMU) with STOP terminal
hardware. See Generac PWRcell Battery
Installation
instructions.
NOTE: Provide signage indicating the PVRSS ini-
tiation device is the REbus PV DC disconnect lo-
cated under the front cover of the inverter, or the
external actuator connected to the STOP terminals.
NOTE: Provide signage indicating where PVRSS
initiation devices are located. Note that if the inver-
ter is installed in the appropriate outdoor location it
may satisfy this requirement.
2. Provide signage complying with section 690.56(C)
of the NEC (NFPA 70), stating all conductors are
controlled.
NOTE: Install one SnapRS to the negative whip (-)
of each PV Module connected to the PV Link.
3. Install the PV Link. See PV Link Installation Guide-
lines for more information.
Upon initiation of rapid shutdown PV Link and SnapRS
will meet or exceed NEC requirements and control volt-
age with a response time of less than 10 seconds. Volt-
age within the array is controlled to no greater 80 VDC
and voltage outside the array is controlled to no greater
than 30 VDC.
PVRSS Compliance
and Owner's Manual for
17