EG4 18KPV User manual

User Manual

EG4 18KPV

Version 2.0.2 | Information subject to change without notice.

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Table of Contents

1 Abbreviations ...........................................................................................................................................................4

2 Safety........................................................................................................................................................................5

2.1

Safety Instructions ............................................................................................................................................5

2.2

Important Safety Notifications .........................................................................................................................5

3 Brief Introduction .....................................................................................................................................................7

3.1

System Diagrams ..............................................................................................................................................7

4 Installation................................................................................................................................................................8

4.1

Packaging List and Placement...........................................................................................................................8

4.2

Location Selection and Installation...................................................................................................................8

4.2.1 Requirements for Installation Location ....................................................................................................8

4.2.2 Installing the Inverter ...............................................................................................................................9

4.2.3 Mounting Steps ......................................................................................................................................10

4.3

Connection Overview .....................................................................................................................................11

4.3.1 System Connections ...............................................................................................................................11

4.4

PV Connection ................................................................................................................................................14

4.4.1 Connecting PV to the Inverter ................................................................................................................14

4.4.2 String Sizing ............................................................................................................................................15

4.4.3 Steps for PV Wiring ................................................................................................................................17

4.5

Battery Connection.........................................................................................................................................17

4.5.1 Connecting Batteries to the Inverter......................................................................................................17

4.5.2 Battery Power Cable Connection............................................................................................................18

4.5.3 Battery Communication Cable Connection ............................................................................................18

4.5.4 AC Wiring Information ...........................................................................................................................20

4.5.5 Steps for AC Connection.........................................................................................................................21

4.5.6 CT/Meter Connection.............................................................................................................................21

4.6

Working with a Generator ..............................................................................................................................23

4.6.1 Generator System Connection ...............................................................................................................23

4.6.2 Connecting the Generator Start Signal (Dry Contact).............................................................................24

4.6.3 Generator Start and Stop Settings .........................................................................................................24

4.7

Off-Grid ..........................................................................................................................................................25

4.7.1 Off-Grid Wiring.......................................................................................................................................25

4.8

AC Coupling Installation Connection ..............................................................................................................25

4.8.1 AC Coupling Settings...............................................................................................................................26

4.9

Parallel System Connection ............................................................................................................................27

4.9.1 Connections for Parallel System .............................................................................................................27

4.9.2 Parallel Information Display ...................................................................................................................27

4.9.3 Parallel Configuration .............................................................................................................................28

4.10

Grid, Load, and AC Connection.......................................................................................................................29

4.10.1 Grid Type and Regulation Connection....................................................................................................29

5 Grid and Load Connections for Split- Phase Service..............................................................................................29

5.1

Decision Tree and Wiring Diagrams................................................................................................................29

6 End User Settings ...................................................................................................................................................46

6.1

Application Settings .......................................................................................................................................46

6.2

Paralleling Settings.........................................................................................................................................46

6.3

Charge Settings ..............................................................................................................................................47

6.4

Generator Charge Settings.............................................................................................................................48

6.5

Discharge Settings..........................................................................................................................................48

7 Installer Settings.....................................................................................................................................................49

7.1

Common Settings...........................................................................................................................................49

7.2

Application Settings .......................................................................................................................................50

7.3

Grid Connect Settings ....................................................................................................................................51

7.4

Charge Settings ..............................................................................................................................................53

7.5

Generator Charge Settings.............................................................................................................................54

7.6

Discharge Settings..........................................................................................................................................54

8 Monitor System Setup............................................................................................................................................56

8.1

Wi-Fi/4G Dongle Connection .........................................................................................................................56

8.2

Third-Party RS485 Communication................................................................................................................57

8.3

Online Monitoring System User Interface .....................................................................................................58

8.3.1 Using the Web interface to set your Wi-Fi password. ...........................................................................58

8.3.2 Dashboard (Monitor Tab) ......................................................................................................................59

8.3.3 Data tab..................................................................................................................................................60

8.3.4 Configuration Tab...................................................................................................................................65

8.3.5 Overview ................................................................................................................................................66

8.3.6 Maintenance ..........................................................................................................................................67

9 Firmware Updates..................................................................................................................................................68

9.1

Firmware Update via EG4 Electronics App ....................................................................................................68

9.2

Firmware Update via Hard-Wired Ethernet Connection ...............................................................................68

9.3

Firmware Update via Monitor Center (website)............................................................................................70

10 Smartphone App Setup.........................................................................................................................................71

10.1

Local Monitoring Setup with the EG4 Monitor app.......................................................................................73

10.2

Troubleshooting Wi-Fi module ......................................................................................................................73

11 Operation Guide.....................................................................................................................................................74

11.1

Operation Mode and Function ......................................................................................................................74

11.1.1 Self-Usage Mode....................................................................................................................................74

11.1.2 Charge First Mode..................................................................................................................................75

11.1.3 AC Charger Mode...................................................................................................................................76

11.1.4 Grid Peak-Shaving Function ...................................................................................................................76

11.1.5 Smart Load Function ..............................................................................................................................76

11.2

Rapid Shutdown (RSD) ...................................................................................................................................77

11.2.1 External RSD...........................................................................................................................................77

11.2.2 External RSD Wiring Instructions ...........................................................................................................78

11.3

LCD Screen .....................................................................................................................................................79

11.3.1 Viewing Information and Alarm Fault/Record.......................................................................................79

11.3.2 Setting Parameters.................................................................................................................................80

11.4

Inverter Start-Up and Shutdown Procedure..................................................................................................84

11.4.1 Starting up the inverter..........................................................................................................................84

11.4.2 Shutting down the inverter....................................................................................................................85

12 Troubleshooting & Maintenance ............................................................................................................................85

12.1

Regular Maintenance.....................................................................................................................................85

12.2

LED Description ..............................................................................................................................................85

12.3

Troubleshooting Based on LCD Screen ..........................................................................................................86

12.3.1 Faults on the LCD and Fault List .............................................................................................................86

12.3.2 Alarm on the LCD and Alarm List ...........................................................................................................88

13 Standards and Certifications ...................................................................................................................................90

14 Technical Specifications ..........................................................................................................................................90

1Abbreviations

• AWG – American Wire Gauge

• A — Amp(s)

• Ah — Amp hour(s)

• AC — Alternating Current

• AHJ — Authority Having Jurisdiction

• ANSI — American National Standards Institute

• BMS — Battery Management System

• DC — Direct Current

• DIP — Dual In-line Package

• DOD – Depth of Discharge

• EG – Equipment Ground

• EGS – Equipment Grounding System

• EPS – Emergency Power System

• ESS – Energy Storage System

• E-Stop NO — Emergency Stop Normally Open

• GE – Grounding Electrode

• GEC – Grounding Electrode Conductor

• GES – Grounding Electrode System

• In. lbs. — Inch Pounds

• kW — Kilowatt

• kWh — Kilowatt-hour

• LFP — Lithium Iron Phosphate or LiFePO4

• mm — Millimeter(s)

• mV — Millivolt(s)

• NEC — National Electrical Code

• NFPA — National Fire Prevention Association

• Nm — Newton meters

• PC — Personal Computer

• PCB – Printed Circuit Board

• PE – Protective Earth (G or Ground)

• PPE — Personal Protective Equipment

• PV — Photovoltaic

• RSD — Rapid Shut Down

• SOC — State of Charge

• V — Volt(s)

2Safety

2.1

Safety Instructions

International safety regulations have been strictly observed in the design and testing of the inverter.

Before beginning any work, carefully read all safety instructions, and always observe them when work-

ing on or with the inverter. The installation must follow all applicable national or local standards and

regulations.

Incorrect installation may cause:

•injury or death to the installer, operator or third party

•damage to the inverter or other attached equipment

2.2

Important Safety Notifications

There are various safety concerns that must be carefully observed before, during, and after the installa-

tion, as well as during future operation and maintenance. The following are important safety notifica-

tions for the installer and any end users of this product under normal operating conditions.

Dangers of High Voltages and Large Current

1. Beware of high PV voltage. Please install an external DC disconnect switch or breaker and

ensure it is in the “off” or “open” position before installing or working on the inverter. Use a

voltmeter to confirm there is no voltage present to avoid electric shock.

2. Beware of high grid voltage. Please ensure the AC switch and/or AC breaker are in the “off” or

“open” position before installing or working on the inverter. Use a voltmeter to confirm there is

no voltage present to avoid electric shock.

3. Beware of high battery current. Please ensure that the battery module breakers and/or on/off

switches are in the “open” or “off” position before installing or working on the inverter. Use a

voltmeter to confirm there is no voltage present to avoid electric shock.

4. Do not open the inverter while it is operating to avoid electric shock and damage from live

voltage and current within the system.

5. Do not make any connections or disconnections (PV, battery, grid, communication, etc.)

while the inverter is operating.

6. An installer should make sure to be well protected by reasonable and professional insulative

equipment [e.g., personal protective equipment (PPE)].

7. Before installing, operating, or maintaining the system, it is important to inspect all existing

wiring to ensure that it meets the appropriate specifications and conditions for use.

8. Ensure that the PV, battery, and grid connections to the inverter are secure and proper to

prevent damage or injuries caused by improper installation.

Warning

1. All work on this product (system design, installation, operation, setting, configuration,

and maintenance) must be carried out by qualified personnel. To reduce the risk of electric shock,

do not perform any servicing other than those specified in the operating instructions unless you

are qualified to do so.

2. Read all instructions before installing. For electrical work, follow all local and national wiring

standards, regulations, and these installation instructions.

3. Make sure the inverter is properly grounded. All wiring should be in accordance with the

National Electrical Code (NEC), ANSI/NFPA 70.

4. The inverter and system can inter-connect with the utility grid only if the utility provider per-

mits. Consult with your local AHJ (Authority Having Jurisdiction) before installing this product

for any additional regulations and requirements for your area.

5. All warning labels and nameplates on this inverter should be clearly visible and must not be

removed or covered.

6. The installer should consider the safety of future users when choosing the inverter’s correct

position and location as specified in this manual.

7. Please keep children away from touching or misusing the inverter and relevant systems.

8. Beware! The inverter and some parts of the system can be hot when in use, please do not touch

the inverter’s surface or most of the parts when they are operating. During operation, only the

LCD and buttons should be touched.

DISCLAIMER

EG4 reserves the right to make changes to the material herein at any time without notice. You may refer

to the EG4 website at www.eg4electronics.com for the most updated version of our manual.

3Brief Introduction

3.1

System Diagrams

This unit and its associated system are suitable for the following applications:

4Installation

4.1

Packaging List and Placement

Packaging List

When the product is unpacked, the contents should match those listed below:

Pictures for reference only, subject to our available products.

4.2

Location Selection and Installation

4.2.1 Requirements for Installation Location

1. The mounting wall should be strong enough to bear the weight of the inverter.

2. Please maintain the minimum clearances presented below for adequate heat dissipation.

3. Never position the inverter in direct sunlight. Please refer to the figure below and choose a well-

shaded site or a shed to protect the inverter from direct sunlight. PROTECT the LCD screen from

excessive UV exposure.

4. The inverter should be installed upright on a vertical surface.

4.2.2 Installing the Inverter

The inverter is designed to be wall-mounted and should be installed on a vertical, solid, mounting sur-

face, such as brick, concrete, or other non-combustible material. Two or more people may be needed

to install the inverter due to its weight. The slots on the mounting bracket can accommodate various

stud spacings from 12 in. (305 mm) to 16 in. (406 mm).

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