Generac Power Systems PV Link User manual

Installation Manual
Generac PV Link™ and SnapRS™
SAVE THIS MANUAL FOR FUTURE REFERENCE
006087
010023
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
Register your Generac product at:
https://pwrfleet.generac.com
1-888-GENERAC
(888-436-3722)
Para español, visita: http://www.generac.com/service-support/product-support-lookup
Pour le français, visiter: http://www.generac.com/service-support/product-support-lookup

Use this page to record important information about your Generac Product
Record PV Link™ and SnapRS™ information
for your PWRcell system on this page.
When contacting a Generac Products
Authorized Service Dealer (ASD) about parts
and service, always supply complete model
number and serial number information.
Operation and Maintenance: Proper
maintenance and care of the energy storage
system ensures a minimum number of
problems and keeps operating expenses at a
minimum. It is the operator’s responsibility to
perform all safety checks, to verify that all
maintenance for safe operation is performed
promptly, and to have the equipment checked
periodically by an ASD. Normal maintenance,
service and replacement of parts are the
responsibility of the owner/operator and, as
such, are not considered defects in materials
or workmanship within the terms of the
warranty. Individual operating habits and
usage may contribute to the need for
additional maintenance or service.
Table 1 - PV Link and SnapRS Important Information
PV Link
Number Location Serial Number RCP Number Parallel Input?
Number of
SnapRS
SnapRS Date of
Manufacture
1
2
3
4
5
6
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Table of Contents
Section 1 Introduction and Safety 1
Introduction ..................................... 1
Safety Rules .................................... 1
General Hazards ............................. 2
PVRSE Warning .............................. 2
Electrical Hazards ........................... 3
Section 2 General Information ..... 5
PV Link Specifications ..................... 5
SnapRS Specifications .................... 5
Unit Dimensions .............................. 6
About PV Link ................................. 7
About Generac SnapRS .................. 7
GFCI Information ............................. 7
AFCI Information ............................. 7
PVRSS Information ......................... 7
Component Locations ..................... 7
Section 3 Installation Design ....... 9
Installation Design Worksheet ......... 9
Section 4 PVRSS Compliance
Guidelines .................................... 11
Section 5 Mounting and
Connecting .................................. 13
Installation Guidelines ................... 13
Attachment and Grounding ........... 13
Connecting to Inverter ................... 14
Connecting PV Modules ................ 14
Section 6 Operating
Instructions .................................. 17
User Interface via Inverter ............. 17
Commissioning the Rebus
System .......................................... 17
PVRSS Commissioning with
SnapRS Devices ........................... 17
Disabling PV Link .......................... 19
AFD Self-Test ................................19
PVRSS Self-Test ...........................19
Section 7 Maintenance ................21
Maintenance ..................................21
Service ...........................................21
Section 8 Troubleshooting .........23

Installation Manual for PV Link and SnapRS 1
Section 1 Introduction and Safety
Introduction
Thank you for purchasing a Generac PWRcell
product.
This manual provides instructions for installing
PV Link and SnapsRS devices. Consult the
installation and operation manuals for other
Generac PWRcell system components, as
applicable.
The information in this manual is accurate
based on products produced at the time of
publication. The manufacturer reserves the
right to make technical updates, corrections,
and product revisions at any time without
notice.
If any section of this manual is not understood,
contact the nearest Independent Authorized
Service Dealer (IASD) or Generac Customer
Service at 1-888-436-3722 (1-888-GEN-
ERAC), or visit www.generac.com for assis-
tance. The owner is responsible for correct
maintenance and safe use of the unit.
This manual must be used in conjunction with
all other supporting product documentation
supplied with the product.
SAVE THESE INSTRUCTIONS for future ref-
erence. This manual contains important
instructions that must be followed during
placement, operation, and maintenance of the
unit and its components. Always supply this
manual to any individual that will use this unit,
and instruct them on how to correctly start,
operate, and stop the unit in case of emer-
gency.
Safety Rules
The manufacturer cannot anticipate every
possible circumstance that might involve a
hazard. The alerts in this manual, and on tags
and decals affixed to the unit, are not all inclu-
sive. If using a procedure, work method, or
operating technique that the manufacturer
does not specifically recommend, verify that it
is safe for others and does not render the
equipment unsafe.
Throughout this publication, and on tags and
decals affixed to the unit, DANGER, WARN-
ING, CAUTION, and NOTE blocks are used to
alert personnel to special instructions about a
particular operation that may be hazardous if
performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
NOTE: Notes contain additional information
important to a procedure and will be found
within the regular text of this manual.
These safety alerts cannot eliminate the haz-
ards that they indicate. Common sense and
strict compliance with the special instructions
while performing the action or service are
essential to preventing accidents.
How to Obtain Service
For assistance, contact the nearest Indepen-
dent Authorized Service Dealer (IASD) or
Generac Customer Service at 1-888-GEN-
ERAC (1-888-436-3722), or visit
www.generac.com.
When contacting Generac Customer Service,
always supply the complete model and serial
number of the unit as given on its data decal
located on the unit. Record the model and
serial numbers in the spaces provided on the
front cover of this manual.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

2 Installation Manual for PV Link and SnapRS
General Hazards
• Connecting Generac PWRcell to the elec-
tric utility grid must only be done after
receiving prior approval from the utility
company.
• Only competent, qualified personnel should
install, operate, and service this equipment.
Strictly comply to local, state, and national
electrical and building codes. When using
this equipment, comply with regulations
established by the National Electrical Code
(NEC), CSA Standard; the Occupational
Safety and Health Administration (OSHA),
or the local agency for workplace health
and safety.
• Protection against lightning surges in
accordance with local electric codes is the
responsibility of the installer.
NOTE: Lightning damage is not covered by
warranty.
• If working on this equipment while standing
on metal or concrete, place insulative mats
over a dry wood platform. Work on this
equipment only while standing on such
insulative mats.
• Never work on this equipment while physi-
cally or mentally fatigued.
• Any voltage measurements should be per-
formed with a meter that meets UL3111
safety standards, and meets or exceeds
overvoltage class CAT III.
PVRSE Warning
NOTE: SnapRS devices must be used in con-
junction with Generac S2502 PV link to form a
complete PVRSS per NEC 690.12
This Photovoltaic Rapid Shutdown Equipment
(PVRSE) does not perform all of the functions
of a complete Photovoltaic Rapid Shutdown
System (PVRSS). This PVRSE must be
installed with other equipment to form a com-
plete PVRSS that meets the requirements of
NEC (NFPA 70) section 690.12 for controlled
conductors outside the array. Other equipment
installed in or on this PV system may
adversely affect the operation of the PVRSS.
It is the responsibility of the installer to ensure
the completed PV system meets the rapid
shutdown functional requirements. This equip-
ment must be installed according to the manu-
facturer’s installation instructions.
(000191)
DANGER
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to
service this equipment and could result in death or
serious injury. (000215)
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
(000670)
WARNING
Hot Surfaces. Locate and install the PV Link so as to avoid
inadvertant contact. When operating in hot weather the
optimizer will become hot and could result in personal
injury.
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
(000182a)
WARNING
Equipment damage. Only qualified service personnel may
install, operate, and maintain this equipment. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
(000655)
WARNING
Equipment damage. Never open the PV Link. The
optimizer is factory-sealed and contains no field-
serviceable parts. Opening the optimizer could result in
equipment damage.
(000669)
WARNING
Equipment damage. Never operate PV Link in ambient
temperatures greater than 158° F (70° C). Operating
PV Link in high temperature conditions will result in
equipment damage.
Equipment damage. Connect only to REbus-compatible
devices to the DC bus. Never connect to any other DC
power source. Connecting to other DC power sources
could result in equipment damage. (000598a)
CAUTION

Installation Manual for PV Link and SnapRS 3
Electrical Hazards
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000599)
Electrocution. Turn battery disconnect OFF and
de-energize REbus before touching terminals.
Failure to do so will result in death, serious injury,
equipment and property damage.
DANGER
(000152)
DANGER
Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000666)
WARNING
Electric Shock. Avoid contact with DC conductors. DC
conductors of this photovoltaic system are ungrounded and
may be energized regardless of sun exposure. Contact with
conductors could result in death or serious injury.
(000187)
WARNING
Electrocution. Potentially lethal voltages are generated
by this equipment. Render the equipment safe before
attempting repairs or maintenance. Failure to do so
could result in death or serious injury.

4 Installation Manual for PV Link and SnapRS
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Installation Manual for PV Link and SnapRS 5
Section 2 General Information
PV Link Specifications
Specifications are subject to change without notice. Refer to the product specification sheet for complete list.
SnapRS Specifications
* 1 SnapRS per PV module.
** Used with a 50 V PV Panel.
Specifications are subject to change without notice. Refer to the product specification sheet for complete list.
Description Units S2502
Rated power W 2500 (continuous)
Peak efficiency % 99
MPPT input voltage VDC 60–360
Rated power input voltage VDC 200–360
Maximum input voltage VDC 420 (absolute maximum)
Maximum input current (operating) A
ºF (ºC)
13 @ 122 (50)
Maximum input current (short circuit) A 18
Maximum output current (fault) A 10
Maximum output voltage VDC 420 (open circuit)
Nominal output - REbus DC nanogrid (380 VDC + data)
Maximum output current (continuous) A 8
Standby power W <1
Topology - Boost converter
Protections - Ground-fault protection, arc-fault protection
(type 1), PVRSE
Operating temperature range ºF (ºC) -40 (-40) to 158 (70)
Enclosure - NEMA Type 3R
Weight lb (kg) 7.3 (3.3)
Certifications - UL 1741
Description Units RS801
PV module maximum VOC V 75
Maximum number of PV modules per
string
- 9*
Efficiency % 99.8**
Maximum input current A 13
Shutdown time Sec < 10
Enclosure rating - NEMA Type 6P
Operating temperature range ºF (ºC) -40 (-40) to 158 (70)
Certifications - UL 1741
Weight oz (g) 3.5 (100)

6 Installation Manual for PV Link and SnapRS
Important Product Information
PV Link Serial Number Location
See Figure 2-1. Serial number tag (A) includes a
removable layer that can be peeled off leaving the
underlying label in place. Adhere the removable
layer to the inside cover of this manual and record
the information from this tag in Table 1: PV Link
and SnapRS Important Information.
Figure 2-1. Serial Number Location
SnapRS Date of Manufacture
Refer to Figure 2-2 to locate the unit date of
manufacture. Record this information in
Table 1: PV Link and SnapRS Important Infor-
mation on the inside front cover of this man-
ual.
Figure 2-2. Date of Manufacture
Unit Dimensions
PV Link Dimensions
Figure 2-3. Unit Dimensions
*18-1/8 in (460 mm) with PV wire bend
radius
SnapRS Dimensions
Figure 2-4. Unit Dimensions
A
010021
A
A9-9/16 in (243 mm)
B* 15-1/2 in (390 mm)
C2-1/16 in (53 mm)
A7/8 in (22 mm)
B7 in (152 mm)
C1 in (25 mm)
r
CB
A
010024
A
C
B

Installation Manual for PV Link and SnapRS 7
About PV Link
The PV Link is a nonisolated, interleaved DC-
DC converter that boosts PV input to a higher
voltage and outputs it to Rebus™, Generac’s
regulated 380 VDC bus. The PV Link provides
droop-mode power management, enabling
multiple optimizers to connect in parallel on a
common bus, and its DC output carries a bidi-
rectional power line communication (PLC)
protocol for communicating with inverters and
other devices on REbus.
The PV Link is sealed in a type 3R enclosure
at the factory and is designed for attachment
to standard PV racking. Safety features
include ground fault detection, arc fault detec-
tion, and rapid shutdown capability.
About Generac SnapRS
SnapRS is an inline PV rapid-shut down
device that satisfies 2017 and 2020 NEC
690.12 PV rapid shutdown system (PVRSS)
requirements. When used with PV Link,
SnapRS devices limit all controlled conductors
within an array’s 1 ft (305 mm) boundary to 80
VDC or less within 30 seconds of rapid shut-
down initiation.
GFCI Information
The PV Link’s internal ground-fault circuit
interrupter (GFCI) is designed to trip at 240
mA (± 40 mA) of PV DC voltage ground cur-
rent. Ground faults are displayed on the PWR-
cell inverter control panel. The PV Link meets
the ground-fault protection requirements in
NEC Article 690.41(B).
AFCI Information
The PV Link is a Photovoltaic DC Arc-Fault
Circuit Protection Type 1 device that incorpo-
rates an internal arc fault circuit interrupter
(AFCI) and meets the Arc-Fault circuit protec-
tion requirement in NEC Article 690.11.
PVRSS Information
PV rapid shutdown system (PVRSS) require-
ments have evolved over time and are defined
by the National Electrical Code (NEC) in con-
junction with UL 1741. Determine what level of
rapid PV shutdown is required for your juris-
diction.
• The 2011 NEC and older editions do not
require PVRSS capability.
• The 2014 NEC requires rapid shutdown
only on the conductors leaving the PV
array.
• The 2017 and 2020 NEC require rapid
shutdown at the PV module level and on
the conductors leaving array.
PV Link is a PV rapid shutdown system equip-
ment (PVRSE) component within a PVRSS. It
only provides rapid shutdown for the conduc-
tors leaving the array. SnapRS devices are
required for PV module level rapid shutdown.
See PVRSS Compliance Guidelines for more
information.
Component Locations
PV Link Component Locations
Figure 2-5. Component Locations
AAttachment Flange Slots
BGrounding Terminals (sized for 1/4 in hard-
ware)
CREBus DC Nanogrid Output Negative (-)
Lead
DREBus DC Nanogrid Output Positive (+)
Lead
EPV Substring Input Negative (-) Lead
FPV Substring Input Positive (+) Lead
GMC4 Connectors
E
C
F
D
A
B
G
010023