EG4 18KPV User Manual
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EG4 18KPV User Manual

Hybrid inverter
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U S E R M A N U A L
E G 4 ® 1 8 k P V H Y B R I D I N V E R T E R
© 2024 EG4 ELECTRONICS, LLC. ALL RIGHTS RESERVED.
VERSION 2.5 | INFORMATION SUBJECT TO CHANGE WITHOUT NOTICE.
MODEL #: 18KPV-12LV

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  • Page 1 E G 4 ® 1 8 k P V H Y B R I D I N V E R T E R © 2024 EG4 ELECTRONICS, LLC. ALL RIGHTS RESERVED. VERSION 2.5 | INFORMATION SUBJECT TO CHANGE WITHOUT NOTICE.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS TECHNICAL SPECIFICATIONS..........................1 ABBREVIATION LIST ............................... 3 SAFETY ..................................4 SAFETY INSTRUCTIONS ............................. 4 IMPORTANT SAFETY NOTIFICATIONS ...................... 4 SYSTEM DIAGRAMS ............................... 6 INSTALLATION ................................7 PACKAGING LIST AND PLACEMENT ........................7 LOCATION SELECTION AND INSTALLATION .....................7 5.2.1 REQUIREMENTS FOR INSTALLATION LOCATION ................7 5.2.2 INSTALLING THE INVERTER ........................
  • Page 3 FIRMWARE UPDATE VIA HARD-WIRED ETHERNET CONNECTION ..........66 11.3 FIRMWARE UPDATE VIA MONITOR CENTER (WEBSITE) ..............68 SMARTPHONE APP SETUP ..........................69 12.1 LOCAL MONITORING SETUP WITH THE EG4 MONITOR APP ............70 12.2 TROUBLESHOOTING WI-FI MODULE ....................... 70 OPERATION GUIDE ..............................71 13.1 OPERATION MODE AND FUNCTION ......................
  • Page 4 14.3.2 ALARM ON THE LCD AND ALARM LIST ..................85 STANDARDS AND CERTIFICATIONS ........................ 87 EG4 10-YEAR LIMITED WARRANTY ........................ 88...

  • Page 5: Technical Specifications

    1. TECHNICAL SPECIFICATIONS AC INPUT DATA NOMINAL AC VOLTAGE 120/240VAC; 120/208VAC (L1/L2/N required) FREQUENCY 50/60Hz MAX. AC CURRENT 50A @ 240VAC MAX. AC INPUT POWER 12000W MAX. AC BYPASS 200A AC GRID OUTPUT DATA MAX. OUTPUT CURRENT OUTPUT VOLTAGE 120/240VAC; 120/208VAC (L1/L2/N required) OPERATING VOLTAGE RANGE 180-270VAC NOMINAL POWER OUTPUT...
  • Page 6 EFFICIENCY 96.9% MAXIMUM EFFICIENCY (PV TO GRID) 97.5% MAXIMUM EFFICIENCY (BATTERY TO GRID) MAXIMUM EFFICIENCY (PV TO BATTERY) 99.9% IDLE CONSUMPTION (NORMAL | STANDBY MODE) ~70W | ~18W BATTERY DATA COMPATIBLE BATTERY TYPES Lead-acid/Lithium MAX. CHARGE/DISCHARGE CURRENT 250A NOMINAL VOLTAGE 48 VDC VOLTAGE RANGE 40-60 VDC (Lithium);...

  • Page 7: Abbreviation List

    2. ABBREVIATION LIST • AWG – American Wire Gauge Isc – Short-Circuit Current • A – Amp(s) • • In. lbs. – Inch Pounds • Ah – Amp hour(s) kW – Kilowatt • • AC – Alternating Current • kWh – Kilowatt-hour •...

  • Page 8: Safety

    3. SAFETY 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 working on or with the inverter. The installation must follow all applicable national or local standards and regulations.
  • Page 9 WARNING: To reduce the risk of injury, read all instructions 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.

  • Page 10: System Diagrams

    4. SYSTEM DIAGRAMS This unit and its associated system are suitable for the following applications:...

  • Page 11: Installation

    5. INSTALLATION PACKAGING LIST AND PLACEMENT When the product is unpacked, the contents should match those listed below: Pictures for reference only, subject to our available products. 5.2 LOCATION SELECTION AND INSTALLATION 5.2.1 REQUIREMENTS FOR INSTALLATION LOCATION 1. The mounting wall should be strong enough to bear the weight of the inverter. 2.

  • Page 12: Installing The Inverter

    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. 5.2.2 INSTALLING THE INVERTER The inverter is designed to be wall-mounted and should be installed on a vertical, solid, mounting surface, such as brick, concrete, or other non-combustible material.

  • Page 13: Mounting Steps

    5.2.3 MOUNTING STEPS For installation on brick or concrete: 1. Mark the drill hole positions with the mounting bracket. Drill four, 5/16 in. (48 mm) diameter holes, making sure the holes are deeper than 2 in. (50 mm). 3. Insert the expansion bolts into the holes and tighten. 4.

  • Page 14: Connection Overview

    5. Hang the inverter on the wall-mount bracket and lock the inverter on the wall using two (2) self- tapping screws on the top of the inverter (not included with inverter). Lock the safety screws on the left and right sides. For installation on concrete board with wood studs: Fasten the mounting bracket to the studs with four (4) heavy duty wood screws, then hang the inverter on the bracket and lock the inverter on the wall with two (2)
  • Page 15 Overview of the Cable Box Integrated Bonded Load L1 :200A Breaker L2: 200A Integrated Bonded Bat. 200A × 2 Breaker Back View of the Cable Box Knockouts...
  • Page 16 Overview of Connection Ports Bottom View of Cable Box Knockouts a. Battery communication port (CAN & RS485) b. CT interface (refer to Section 5.5.6 for CT connection) c. INV 485: debugging port d. Parallel communication port (refer to Section 5.9 for parallel connection) e.

  • Page 17: Pv Connection

    5.4 PV CONNECTION 5.4.1 CONNECTING PV TO THE INVERTER Cable Requirements: Cable Size Minimum Insulator Voltage 10 AWG – 6AWG (Max) (6 mm – 16 mm 600V Consult with your installer to ensure that appropriate cable sizing is used due to various factors such as voltage drop and VOC.

  • Page 18: String Sizing

    5.4.2 STRING SIZING When solar modules are put in a series string, the voltage multiplies times the number of modules and the amperage stays the same as each module. For example: Using solar modules that have a 40 Voc (77ºF) with an amperage of 10 Amps (Imp) - 10 modules wired in a series string would have a Voc of 400 VDC (77ºF) and a string amperage of 10 Amps.
  • Page 19 Finally, calculate the maximum current of the string so as not to exceed the Inverter’s MPPT circuit ratings. Double check if the calculated Vmp range is within the 230-500 VDC optimal MPPT circuit operating range. Consult a solar designer if needed. NOTE: For all modules, the calculations need to be performed or verified by using a string calculator or consulting a professional.

  • Page 20: Steps For Pv Wiring

    5.4.3 STEPS FOR PV WIRING 1. Ensure all breakers and disconnect switches are in the OFF position before connecting or disconnecting wires. Use a voltmeter to confirm there is no voltage present. 2. Strip off 1/4 in. – 5/16 in. (6mm – 8 mm) insulation on the PV string’s positive and negative conductors.

  • Page 21: Battery Power Cable Connection

    The inverter supports both CAN and RS485 communication. NOTE: If using EG4 LifePower4 batteries in the system, an optional firmware update is required for closed-loop communications. Please contact your distributor for this file, or navigate to https://www.eg4electronics.com/ for the most recent updates and documentation.
  • Page 22 “00000” as the password to enter settings menu. NOTE: For communication with EG4 batteries, select “Lithium” under ‘Battery type’ and then select “0: EG4” under ‘Lithium Brand’. For more information on configuring charge/discharge settings, refer to Section 12.3.2 – Setting Parameters...

  • Page 23: Ac Wiring Information

    5.5.4 AC WIRING INFORMATION When sizing AC wires please adhere to the following information. Cable Requirements: Terminal Connection Wire Size Torque Values 95-165 in-lbs. (10.7Nm-18.6Nm) GRID 6-4/0 AWG (26.7mm²-107mm²) depending on wire Size according to generator 95-165 in-lbs. (10.7Nm-18.6Nm) output depending on wire 95-165 in-lbs.

  • Page 24: Steps For Ac Connection

    5.5.5 STEPS FOR AC CONNECTION REMINDER: After connecting all AC wiring, put the built-in LOAD breaker back to the ON position before providing power to the load. Before connecting or disconnecting AC wires, ensure all breakers are in the OFF position. Check that there is no voltage present with a voltmeter.
  • Page 25 1 2 3 4 5 6 7 8 Description Reserved CT2N CT2P CT1N CT1P Please refer to the connection diagram to the left for the correct position of the CTs. Clamp the 2 CTs onto the L1 and L2 wires at the service entry point in the main service panel.

  • Page 26: Working With A Generator

    Extending the CT Clamp Cable The CT wires can be extended with a common ethernet cable if they are not long enough. An RJ45 adapter is needed for the extension. The CT wires can be extended up to 300 ft. (around 90 m).

  • Page 27: Connecting The Generator Start Signal (2-Wire Start)

    5.6.2 CONNECTING THE GENERATOR START SIGNAL (2-WIRE START) Example 1 Example 2 When the generator is started, all the loads connected to the LOAD terminals will be supplied by the generator while still charging batteries. The pass-through relay on the generator terminal is 90A. When the generator is on, please ensure the total load and charge current does not exceed 90A.

  • Page 28: Off-Grid Wiring

    When battery voltage or SOC is higher than the Charge end Volt/SOC settings. 5.7 OFF-GRID WIRING The 18kPV can fully function in Off-Grid only mode. It does not need the utility or generator to function. Purely off-grid systems that do not have access to the utility should strongly consider having a 2-wire start backup generator for extended cloudy periods (8-12 kW diesel recommended per 18kPV inverter - 21kWs max per inverter).
  • Page 29 What is frequency-shifting power reduction? All UL1741SA compliant grid-interactive inverters have the Frequency-Watt feature, which requires the grid-interactive inverter to reduce power with increasing grid frequency. The power will drop to zero before the over-frequency trip threshold is reached. When the grid is down and the hybrid inverter requires an AC coupled inverter to reduce power, it simply shifts the output frequency up slightly, and the grid-interactive inverter will limit its output power accordingly after sensing this frequency shift.

  • Page 30: Parallel System Connection

    5.9 PARALLEL SYSTEM CONNECTION 5.9.1 CONNECTIONS FOR PARALLEL SYSTEM The hybrid inverter supports parallel connection to expand power and energy capacity to suit different usage scenarios. Up to 10 units can be paralleled to reach a capacity of 120kW. The parallel wiring diagrams are as follows. The manual bypass switch connects the loads to LOAD panel as default.

  • Page 31: Parallel Information Display

    5.9.2 Parallel Information Display The information in the red box shows the parallel information: • Pnum: 01 – 10 a. Display number of parallel units • Role: P or S: a. P = Master b. S = Slave • Phase: 1 – 3: a.

  • Page 32: Grid, Load, And Ac Connection

    7. Enable Share battery on all inverters and ensure the communication cable from the battery is connected to the Master unit. IMPORTANT: Make sure the safety standard and grid type configurations are consistent. (See image on right) Commissioning Steps: 1. Turn on the battery and make sure the communication works on all units.

  • Page 33: Grid And Load Connections For Split- Phase Service

    6. GRID AND LOAD CONNECTIONS FOR SPLIT- PHASE SERVICE The inverter can withstand up to 8kW of imbalance between L1 and L2. However, the loads should be balanced as much as possible to avoid damaging the load side equipment. The connection diagrams for 120/240V service are shown in the following pages.

  • Page 34: Decision Tree And Wiring Diagrams

    7. DECISION TREE AND WIRING DIAGRAMS...

  • Page 47: End User Settings

    If Fast Zero Export is enabled, the inverter will adjust output power accordingly. 8.2 PARALLEL SETTINGS Set Slaves or Master: The EG4 18kPV supports paralleling of multiple inverters. You • would need to connect the LOAD terminals together for paralleling. In this scenario we need to set one of the inverters to master and the others to Slave.

  • Page 48: Charge Settings

    Battery Backup Mode For the EG4 18kPV in default mode; if PV power is sufficient to cover the demands of home loads, then PV power will prioritize home loads first. If there is excessive PV power; the remainder will be used to charge the battery.

  • Page 49: Generator Charge Settings

    PV Charge Priority: Enable this setting to prioritize Solar for charging batteries. • Note: For PV Charge Priority to function as intended, Off-Grid mode must be disabled. PV Charge Power (kW): The max charge power from PV. • PV Charge Priority Stop SOC (%)/Volt (V): The inverter will stop charging the batteries •...

  • Page 50: Installer Settings

    On-Grid Discharge Cut-Off SOC(%)/Volt(V) Off-Grid Discharge Cut-Off • SOC(%)/Volt(V): When the inverter connects to the grid and if the battery is discharging to take the load, it will stop discharge when the SOC is lower than this limit. Forced Discharge Forced Discharge Enable/Disable: If the customer wants to simply discharge the •...

  • Page 51: Application Settings

    NOTE: When changing the “Model” settings, you need to set inverter to “Standby” first, and then press “Set Battery” to change the model. Model Measurement: Choose the correct measurement, Meter Type or CT Sample Ratio • according to the external measuring device you installed. The default measurement is CT with sample ratio: 1000/1, and you can adjust the measurement if you have installed a meter to the inverter.
  • Page 52 Restart Inverter: Resets the inverter. • Parallel System Set System Type: The EG4 18kPV supports paralleling of multiple inverters. You would • need to connect the LOAD terminals together for paralleling. In this scenario we need to set one of the inverters to Master and the others to Slave. If you install all inverters as single-phase, be sure to set one of the inverters to “1 Phase Master”.

  • Page 53: Grid Connect Settings

    9.3 GRID CONNECT SETTINGS Grid Regulation: Select the correct Grid safety regulation. • Grid Frequency: If the Grid Frequency is nominal at 50Hz, then the inverter’s Frequency • will be adjusted to 50Hz automatically. If there is no grid power and it is read as 50Hz but the devices are 60Hz;...

  • Page 54: Charge Settings

    Grid Freq Limit 1-3 Low (Hz): Minimum acceptable grid frequency for inverter(s). • Grid Freq Limit 1-3 High (Hz): Maximum acceptable grid frequency for inverter(s). • Grid Volt Mov Avg High(V) • Power Soft Start Slope(%/min): The rate at which the inverter will reactivate Grid •...

  • Page 55: Generator Charge Settings

    Battery Backup Mode For the EG4 18kPV in default mode; if PV power is sufficient to cover the demands of home loads, then PV power will prioritize home loads first. If there is excessive PV power; the remainder will be used to charge the battery.

  • Page 56: Discharge Settings

    9.6 DISCHARGE SETTINGS Batt Discharge Control: If the inverter communicates with the Lithium battery and is • capable of closed-loop communication, then you can select discharge control according to “SOC.” When using Lead-Acid batteries or Lithium batteries without communication, you can always select discharge control according to “VOLT.” Discharge Current Limit (Adc): The max.
  • Page 57 • the 18kPV system to function in both On-Grid and Off-Grid mode, you would connect the AC output of the existing On-Grid PV inverter to the GEN terminal of the 18kPV and enable the AC Couple function. AC Couple Start Volt(V)/SOC (%): AC Coupling will start at this set Voltage/SOC.

  • Page 58: Monitor System Setup

    10. MONITOR SYSTEM SETUP 10.1 WI-FI/4G DONGLE CONNECTION A Wi-Fi/4G dongle can be used to monitor the inverter and remotely view the monitoring data on a computer or smart phone. You can attach this module by plugging it in to the side of the inverter and securing it with the 4 Phillips head screws.

  • Page 59: Third-Party Rs485 Communication

    10.2 THIRD-PARTY RS485 COMMUNICATION Meters 485B and 485A can be used when a meter is not connected. These two pins can be used to communicate with the inverter using the RS485 Modbus protocol. INV485: This interface is shared with the Wi-Fi module. If the Wi-Fi module is not in use, this interface can be used to communicate with the inverter.

  • Page 60: Online Monitoring System User Interface

    10.3 ONLINE MONITORING SYSTEM USER INTERFACE After connecting the Wi-Fi dongle, create an account by registering at https://monitor.eg4electronics.com/. NOTE: The monitoring system may change due to updates, so you may find the following UI descriptions vary from the current pages on the site.

  • Page 61: Dashboard (Monitor Tab)

    4. Select the Wi-Fi network you want to connect to and the click “OK.” Input the Wi-Fi password and click “Save.” 5. After saving your settings, the dongle will restart. After you set the password, three lights will be solid on, which means the inverter is connected to the server. You can now input your account login and password to begin monitoring your system.

  • Page 62: Data Tab

    North America – Clicking this will allow you to change the country. English – Clicking this will allow you to change the language of the page. Cluster (Username) – Clicking this will open a list with User Center (used for editing your profile), Modify password (used to change your password), and Logout (to logout of this account) Name...
  • Page 63 Name Description Voltage of solar input (“V” stands for volts, lower-case “pv” stands for PV) Power of solar input (first letter “P”, lower-case “pv” stands for PV) SOC(%) Battery/batteries state of charge. Vacr Voltage of AC output (“V” stands for voltage, “ac” for AC, and “r” for phase U) Reactive power of AC output (“Q”...
  • Page 64 Energy “Energy” tab shows how energy (y-axis) changes with time, daily, by date (x-axis) in one month. • Selecting ‘Month’ will show the energy statistics for each day. • Selecting ‘Year’ will show energy for each month. • Selecting ‘Total’ will show energy for each year. Name Description E_pv1(kWh)
  • Page 65 History Data The measured technical characteristics of PV, battery, load, and grid are listed under "Historical data" for users or their distributor's examination to promptly address any potential issues. Advanced technical knowledge is necessary to properly comprehend this table. End users are advised to concentrate solely on the "Monitor"...
  • Page 66 Local Data The data captured during the offline periods are displayed in the "Local data" section (loss of Internet or Wi-Fi). The only distinction from “History data” is that it is used for offline data recording. Local data is recorded while the system is offline for more than 20 minutes and is taken every 5 minutes.

  • Page 67: Configuration Tab

    10.3.4 CONFIGURATION TAB The “Configuration” page is used for users to manage their station, dataloggers and user information. Stations This tab will show all stations linked to your account. Clicking on a station name will display all inverters under that station or location. Clicking the Add Station button creates another site if you have more than one station under the same account.

  • Page 68: Overview

    End users can edit password and personal information in the user page. Distributors can add an installer account and end user account on this page. 10.3.5 OVERVIEW "Overview" allows EG4 or its distributors to quickly monitor system-wide data for their end users, such as solar yields, battery discharging, and other factors. Station Overview All the stations linked to the account can be found here.

  • Page 69: Maintenance

    Distributors can manage all settings for all inverters at once with the help of the batch setting capability supported by EG4's monitor system. NOTE: If trying to update firmware locally, see Section 10 IMPORTANT: Advanced technical knowledge is necessary to properly make changes.

  • Page 70: Firmware Updates

    11.1 FIRMWARE UPDATE VIA EG4 ELECTRONICS APP NOTE: When updating your firmware through the EG4 APP, be sure to have plenty of battery life on your device and do not close the application. Make sure you have the Wi-Fi dongle connected securely and correctly configured (See Section 9.1 for Wi-Fi Dongle connection steps) for the inverter before...
  • Page 71 NOTE: Be sure to disconnect the Wi-Fi dongle when utilizing this direct connection. Step 3: Run the Wlocal.exe software. (Please contact your distributor for access to this program) Step 4: Select the top left button (L), and change your language to English if need be. Step 5: Select your COM (Serial) port and click “Connect”.

  • Page 72: Firmware Update Via Monitor Center (Website)

    EG4 Electronics website monitoring system. Please contact EG4 to make sure you have the correct files. Step 2: Log into the EG4 Electronics Monitor System. Select “Maintenance,” and then select “Remote Update.” Step 3: Choose the inverter you would like to update and then select “Standard Update”. The Monitor Center will begin updating both firmware files in the inverter.

  • Page 73: Smartphone App Setup

    12. SMARTPHONE APP SETUP You need to register for a monitoring account and set the Wi-Fi password for the Wi-Fi dongle before using EG4's monitoring system. 1. Register your account Visit https://monitor.eg4electronics.com/ download the ‘EG4 Monitor' app to register for an end-user account.

  • Page 74: Local Monitoring Setup With The Eg4 Monitor App

    12.1 LOCAL MONITORING SETUP WITH THE EG4 MONITOR APP If there is no Wi-Fi available at the location, you can use the local function to monitor or set up the system. 1. Download the EG4 Monitor app. 2. Connect your device to the Wi-Fi hotspot after the INV LED on the Wi-Fi module is solid on.

  • Page 75: Operation Guide

    13. OPERATION GUIDE 13.1 OPERATION MODE AND FUNCTION 13.1.1 SELF-USAGE MODE In this mode, the order of priority for powering loads is Solar>Battery>Grid. The order of priority for solar power usage is Load>Battery>Grid. • Application Scenarios Self-usage mode will increase the self-consumption rate of solar power and reduce energy bills significantly.

  • Page 76: Pv Charge Priority Mode

    13.1.2 PV CHARGE PRIORITY MODE The order of priority for solar power usage will be Battery>Load>Grid. During the PV Charge Priority period, loads are first supplied power from the grid. If there is excess solar power after charging batteries, the excess solar will power the loads along with grid power. •...

  • Page 77: Ac Charger Mode

    13.1.3 AC CHARGER MODE AC charger mode Users can charge batteries with grid power when electricity prices are low, then use battery power run loads or export to the grid when electricity prices are high. Application Scenarios When users have a Time of Use (TOU) rate plan.

  • Page 78: Rapid Shutdown (Rsd)

    (check with your AHJ for requirements). NOTE: When using supported EG4 batteries in closed-loop communications with the inverter, the RSD also initiates ESS Disconnect as required by NEC code. In case of emergency, press the rapid shutdown button to cut off the RSD power supply, in turn cutting the inverter’s AC...

  • Page 79: External Rsd Wiring Instructions

    13.2.2 EXTERNAL RSD WIRING INSTRUCTIONS Wire the E-Stop Switch into the RSD terminals according to the Switch’s specifications. See image to the right E-Stop Switch NOTE: If your inverter does not have the RSD terminals located in the above photo, please contact your distributor for information regarding the steps for RSD installation.

  • Page 80: Lcd Screen

    13.3 LCD SCREEN Running status, real-time power, and daily and accumulated energy information can all be conveniently viewed on the inverter’s LCD screen. Additionally, users can check the alarm and fault record on the display for troubleshooting. 13.3.1 VIEWING INFORMATION AND ALARM FAULT/RECORD Home Screen Touch the LCD screen to light it up if in sleep mode.

  • Page 81: Setting Parameters

    Fault/Alarm Information By touching the bell icon at the bottom of the screen, users will see all the current and historical faults and warning information on this page. 13.3.2 SETTING PARAMETERS Click on the gear icon at the bottom of the screen to get into the parameter setting page for the inverter.
  • Page 82 ‘Max Export to Grid(kW).’ NOTE: Zero Export cannot prevent export of energy supplied by inverters that are AC Coupled to the 18kPV. Charge Settings Operating Mode: Users can decide to use state of charge (SOC) or battery voltage (Bat V) to control charge and discharge logic depending on battery type.
  • Page 83 Generator Bat. charge current ): M limit(A aximum battery charge current from the generator. The generator will start charging according to the ‘Charge start Volt/SOC’ and stop charging when the battery voltage or SOC reaches the ‘Charge end Volt/SOC’ value Gen rated power(kW): The inverter has a peak- shaving function.
  • Page 84 Grid type: You can choose 240/120V or 220/208V Grid Regulation: Select the correct Grid safety regulation. Grid Frequency: If the Grid Frequency is nominal at 50Hz, then the inverter’s Frequency will be adjusted to 50Hz automatically. If there is no grid power and it is read as 50Hz but the devices are 60Hz;...

  • Page 85: Inverter Start-Up And Shutdown Procedure

    ‘Role’ setting of the parallel system. It is set to ‘1 phase master’ by default. In a parallel system, only one inverter is allowed to be set as Master and the others are set as Slaves. ‘Phase’ is the phase code setting of the load output.

  • Page 86: Troubleshooting & Maintenance

    14. TROUBLESHOOTING & MAINTENANCE 14.1 REGULAR MAINTENANCE Inverter Maintenance  Inspect the inverter every 6 months to check for any damaged cables, accessories, or terminals, and inspect the inverter itself.  Inspect the inverter every 3 months to verify if the operating parameters are normal and there is no abnormal heating or noise from all components in the system.

  • Page 87: Troubleshooting Based On Lcd Screen

    14.3 TROUBLESHOOTING BASED ON LCD SCREEN Once there is any warning or fault occurring, users can troubleshoot according to the LED status description and the warning/fault information on the LCD screen. 14.3.1 FAULTS ON THE LCD AND FAULT LIST If the dot on the left of the fault item is red, it means the fault is active.
  • Page 88 Please check if the PV string voltage is within the inverter specification. If PV volt high PV voltage is too high string voltage is within range and this fault persists, contact your supplier. Hardware level over current Restart the inverter. If the fault Hard over curr protection triggered persists, contact your supplier.
  • Page 89 First confirm the wiring for the parallel system is correct. Once verified, connect each inverter to the Para Phase set grid. The system will automatically Incorrect setting of phase in parallel error detect the phase sequence and the fault automatically resolves after the phase sequence is detected.
  • Page 90 1. Check the battery communication cable for correct pinout on both inverter and battery end. 2. Check if you have chosen an Bat Fault Battery cannot charge or discharge incorrect battery brand. 3. Check if there is fault on battery's indicator.

  • Page 91: Standards And Certifications

    Master and set the other as Slave. 15. STANDARDS AND CERTIFICATIONS The EG4 18kPV is ETL & cETL listed and complies with national and international standards for safety and reliability when connected to the grid. Safety •...
  • Page 92 Damages incurred from a voltage or current spikes due to open-loop Lithium Battery communications EG4 product warranty is a limited warranty – EG4 limits its liability in the event of a product defect to repair or replacement in accordance with the terms of this limited warranty. EG4 is not responsible for any additional or indirect damages that may arise from the malfunctioning of the product.
  • Page 93 NOTES...
  • Page 94 CONTACT US support@eg4electronics.com (903) 609-1988 www.eg4electronics.com...

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