Generac Power Systems RS801 User manual

SAVE THIS MANUAL FOR FUTURE REFERENCE

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1-888-GENERAC

(1-888-436-3722)

Installation Manual

Generac SnapRS™

010050

(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.

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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

ii Installation Manual for SnapRS

(000393a)

WARNING

CANCER AND REPRODUCTIVE HARM

www.P65Warnings.ca.gov.

Installation Manual for SnapRS iii

Section 1: Introduction and Safety

Introduction ..........................................................1

Read This Manual Thoroughly ....................................1

Safety Rules .........................................................1

How to Obtain Service .................................................1

General Hazards ..................................................2

PVRSE Warning ...................................................2

Electrical Hazards ................................................3

Safety Shutdown ..................................................3

Section 2: General Information

Specifications ......................................................5

Serial Number Location ......................................5

Unit Dimensions .................................................5

About PV Link Optimizer .....................................5

PVRSS Information ..............................................6

Component Locations .........................................6

Section 3: Installation and Enabling

Instructions

Installing SnapRS Devices .................................7

Enabling Generac SnapRS Devices ...........................8

Section 4: Troubleshooting

DMM Red to SnapRS +, DMM Black to SnapRS – .....9

DMM Red to SnapRS –, DMM Black to SnapRS + .....9

iv Installation Manual for SnapRS

This page intentionally left blank.

Introduction and Safety

Installation Manual for SnapRS 1

Section 1: Introduction and Safety

Introduction

Thank you for purchasing Generac SnapRS™. SnapRS

devices are solid-state switches designed to safely

interrupt a circuit of solar photovoltaic (PV) modules in

the event of a rapid shutdown command from a Generac

PWRcell™ Inverter.

This manual provides instructions for installing SnapRS.

Commissioning instructions are provided in the Generac

PV Link™ Installation Manual. 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.

Read This Manual Thoroughly

(000100a)

WARNING

Consult Manual. Read and understand manual

completely before using product. Failure to

completely understand manual and product

could result in death or serious injury.

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-GENERAC), 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 reference. This

manual contains important instructions that must be fol-

lowed 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 emergency.

Safety Rules

The manufacturer cannot anticipate every possible cir-

cumstance that might involve a hazard. The alerts in this

manual, and on tags and decals affixed to the unit, are

not all inclusive. If using a procedure, work method, or

operating technique that the manufacturer does not spe-

cifically 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, WARNING, 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:

(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.

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 hazards 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 Independent Autho-

rized Service Dealer (IASD) or Generac Customer Ser-

vice at 1-888-GENERAC (1-888-436-3722), or visit

www.generac.com.

When contacting Generac Customer Service about parts

and service, always supply the complete model and

serial number of the unit as given on its data decal

located on the unit.

Introduction and Safety

2 Installation Manual for SnapRS

General Hazards

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.

(000191)

DANGER

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.

(000662)

WARNING

Electric Shock. Consult installation documentation for all

other REbus™ devices on the system. Failure to do so

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.

WARNING

Risk of Burn. Use protective gloves when

handling hot parts. Failure to do so could

result in serious injury.

(000386)

(000667)

Equipment damage. Never open a Generac SnapRS device.

Generac SnapRS devices are factory-sealed and contain

no field-servicable parts. Opening a Generac SnapRS device

could result in equipment damage.

CAUTION

(000665)

Equipment damage. Connect to REbus-compatible PV

optimizers only. Generac SnapRS devices are for use with

ungrounded PV arrays only. Connecting to other equipment

could result in equipment damage.

CAUTION

•Connecting Generac PWRcell to the electric 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 com-

ply to local, state, and national electrical and build-

ing 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.

•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 physically or

mentally fatigued.

•Any voltage measurements should be performed

with a meter that meets UL3111 safety standards,

and meets or exceeds overvoltage class CAT III.

PVRSE Warning

This Photovotaic 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

complete PVRSS that meets the requirements of NEC

(NFPA 70) section 690.12 for controlled conductors

within and outside the array. SnapRS devices are for

conductors within 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 that the completed PV system meets the rapid

shutdown functional requirements.

This equipment must be installed according to the

manufacturer’s installation instructions.

Introduction and Safety

Installation Manual for 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)

DANGER

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.

(000188)

DANGER

Electrocution. Do not wear jewelry while

working on this equipment. Doing so will

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.

(000668)

WARNING

Electric Shock. Cover PV modules in opaque material

before connecting or disconnecting the Generac SnapRS

devices. Failure to do so could result in death or serious

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.

(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.

Safety Shutdown

(000600)

DANGER

Electrocution. Initiate a system-wide safety shutdown

and turn PWRcell Disconnect Switch OFF on all

connected batteries before performing service. Failure

to do so will result in death, serious injury, equipment

and property damage.

NOTE: A loss of grid power will not de-energize REbus

in a system configured to island or provide backup power.

See Figure 1-1. Shutdown button (A) on the Generac

PWRcell Inverter control panel activates Safety

Shutdown. Safety Shutdown signals connected devices

to shutdown and limit output voltage to a safe level. An

external shutdown button may also be installed, given

appropriate labeling. See the Generac PWRcell Inverter

Installation Manual for more information.

To enter Safety Shutdown, press and hold Shutdown (A).

Safety shutdown LED (B) will illuminate and LCD screen

REbus Inverter

Internet

Shutdown

(hold)

009918

Figure 1-1. Safety Shutdown Button (Located on

Inverter Control Panel)

Upon entering Safety Shutdown, a shutdown signal will

be transmitted to all devices connected to REbus. In

Safety Shutdown:

•Generac PWRcell Inverter will disconnect from the

grid.

•Generac PWRcell Inverter will stop sourcing power

to REbus, and immediately disable all sources on

REbus by sending a global shutdown signal.

•All Generac PV Link Optimizers will disconnect

their output.

•Safety Shutdown LED (B) will be illuminated to

show that the inverter has entered safety shut-

down. REbus DC bus voltage will be displayed on

the inverter screen.

Introduction and Safety

4 Installation Manual for SnapRS

This page intentionally left blank.

Installation Manual for SnapRS 5

General Information

Section 2: General Information

Specifications

Description Units RS801

PV module maximum VOC V 75

Maximum PV Modules per String - 10

Efficiency % 99.8*

Maximum input current A 13

Shutdown time sec < 10

Enclosure rating - NEMA 6P

Operating temperature range ºF (ºC) -40 (-40) to 158 (70)

Certifications - UL 1741

Weight oz (g) 3.5 (100)

*Used with a 50 V PV Panel

Specifications are subject to change without notice. Refer to the product specification sheet for complete list.

Serial Number Location

Refer to Figure 2-1 to locate the unit serial number and

date of manufacture (A). Record the information from this

tag in the PV Link Important Information table located on

the inside front cover of the Generac PV Link Installation

Manual. When requesting assistance, you may be asked

to provide this information.

009954

Figure 2-1. Serial Number Location

Unit Dimensions

009955

010051

Figure 2-2. Unit Dimensions

About PV Link Optimizer

Generac SnapRS devices are designed to connect PV

modules within a string array to achieve 2017 and 2020

NEC 690.12 compliance with PV rapid shutdown system

(PVRSS) requirements. When used with Generac PV

Link™, Generac SnapRS devices allow all controlled

conductors within an array’s 1 ft (305 mm) boundary to

be limited to 80 VDC or less within 30 seconds of rapid

shutdown initiation.

SnapRS devices install to the negative (-) whip of each

PV module in the array using MC4 PV connectors. Each

PV module must have exactly one SnapRS device.

During a shutdown event, SnapRS devices isolate PV

modules to satisfy NEC 2017/2020 array conductor

voltage requirements.

NOTE: Generac SnapRS devices are not compatible

with existing Pika S2501 PV Links. If an existing PV array

must be brought into 2017 or 2020 NEC compliance,

Generac S2502 or newer model PV Links are required.

1 in (25.4 mm)

7 in (152.4 mm)

1 in (25.4 mm)

6 Installation Manual for SnapRS

General Information

PVRSS Information

PVRSS requirements have evolved over time and are

defined by the National Electrical Code (NEC) in

conjunction with UL 1741. The 2017 and 2020 NEC

added to the PVRSS requirement by mandating the need

to reduce voltages of controlled conductors to less than

80 VDC within the array. NEC Article 690.12(C) contains

all of the requirements for the type and location of the

PVRSS initiation device. SnapRS is a PV rapid shutdown

system equipment (PVRSE) component within a PVRSS.

Component Locations

010050

Figure 2-3. Component Locations

TABLE 1. Component Locations

APositive PV Connector

BNegative PV Connector

Table of contents

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