LIVOLTEK GF1-3K48S1 User Manual

Off-grid inverter

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User Manual

Off-Grid Inverter

The copyright of this manual belongs to Hangzhou Livoltek Power Co., Ltd. Any corporation

or individual should not plagiarize, partially or fully copy (including software, etc.), and no

Livoltek Power Co., Ltd. reserves the right of final interpretation.

GF1- 21-V4-2209

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Page 1 Off-Grid Inverter Copyright Declaration The copyright of this manual belongs to Hangzhou Livoltek Power Co., Ltd. Any corporation or individual should not plagiarize, partially or fully copy (including software, etc.), and no reproduction or distribution of it in any form or by any means. All rights reserved. Hangzhou Livoltek Power Co., Ltd.
Page 3: Table Of Contents
Table of Contents About This Manual................ 1 1.1 Scope ................... 1 Target Group ............... 1 1.3 Levels of warning messages ..........1 1.4 How to use this manual ............. 1 Safety ..................... 2 2.1 SafetyInstructions ..............2 Symbol on the Type Label..........4 Scope of Delivery .................
Page 4 6.2 AC Input / Output Connection ......... 25 6.3 Battery Connection ............29 6.4 Dry Contact Signal for Generator ........34 6.5 WIFI & LAN Module Connection (Optional) ....35 6.6 External LCD Display (Optional) ........37 6.7 Parallel Connection (Optional) ......... 38 6.8 Installation Verification ............
Page 5: About This Manual
The user manual mainly describes the product information, safety and installation guidelines as well as information on wiring and troubleshooting of the unit. This manual is valid for GF1-3K48S1, GF1-5K48S1. 1.2 Target Group This manual is intended for qualified personnel who are responsible for the installation and commissioning of the inverter.
Page 6: Safety
The safety instructions in this manual cannot cover all the • precautions that should be followed. Perform operations considering actual onsite conditions. LIVOLTEK shall not be held liable for any damage caused by • violation of the safety instructions in this manual. 2.1.1...
Page 7 Wait at least 10 minutes for the internal capacitors to discharge • after the battery is turned off. Ensure that there is no voltage or current before installing or • disconnecting any connectors. All safety instructions, warning labels, and nameplate on the •...
Page 8: Symbol On The Type Label
2.2 Symbol on the Type Label Symbol Explanation CE mark. The inverter complies with the requirements of the applicable CE guild lines Beware of hot surface. The inverter can become hot during operation. Avoid contact during operation. Danger of high voltages. Danger to life due to high voltages in the inverter! Danger.
Page 9: Scope Of Delivery
Scope of Delivery J(optional) K(optional) L(optional)
Page 10 Item Designation Inverter Expansion Screws for Fixing Mounting Bracket M3 Screws for Fixing the inverter NTC cable Terminal block SC25-5 for battery cables Terminal block for PV and AC cables User Manual Tape for NTC cable Certificate card Wi-Fi & LAN board (optional) Parallel board (optional) LCD Display kits (optional) Note: Delivery marked with“（optional）”, which need to be...
Page 11: Product Introduction
Product Introduction LIVOLTEK GF Series off-grid inverter is an important part of the off- grid solar power supply system, combining functions of inverter, MPPT solar charger and battery charger to offer uninterruptible power supply, which is ideal for off-grid backup power and self- consumption applications.
Page 12: Appearance
4.2 Appearance View of the GF1 Series off-grid inverter Position Designation LED indicators Indicates the current working state of the inverter. Type Label The type label uniquely identifies the inverter. You will find the following information on the type label: •...
Page 13: Interfaces
4.3 Interfaces Circuit breaker AC input port Parallel communication ports (for parallel mode) Reset function key for internal Wi-Fi or LAN EPS output on/off switch PV1 connection Area (PV string1 input ) PV2 connection Area (PV string2 input only for 5kW ) AC output port Split LCD screen communication port Ethernet cabling port...
Page 14: Dimensions
4.4 Dimensions...
Page 15: System Diagram
4.5 System Diagram Solar Power and AC Power available Solar Power and AC Power not available...
Page 16: Working Modes
4.6 Working Modes LIVOLTEK GF Series off-grid inverters is for autonomous solar energy generation, and incorporate batteries and generators to maintain a constant supply of electricity to your home, shack or farm. With the intelligent AC and PV complementation power supply function, the unit can seamless switch in auto between different power sources to offer uninterruptible power support.
Page 17 4.6.2 Backup Mode: This mode allows you to dedicate the full capacity of the battery for backup power supply during public electricity network fails, meanwhile to avoid excess battery charge/discharge and prolong battery life. If you never know when the next grid outage might be, it makes perfect sense to prioritize keeping a full battery.
Page 18: Storage
4.6.3 Economic Mode (Default) This mode applies to areas where the electricity price is high, the unit allows you to choose on how to power your loads, which help to optimize self-consumption and reducing electricity costs. In Economic Mode: The discharge cut-off voltage (lead-acid battery) or SOC •...
Page 19: Mechanical Mounting
Mechanical Mounting 5.1 Requirements for Mounting Make sure there is no electrical connection before installation. • In order to avoid electric shock or other injury, make sure that • holes will not be drilled over any electricity or plumbing installations. Always follow the instructions when moving and positioning the •...
Page 20 5.1.2 Environment Requirements The inverter should be installed in a ventilated environment to ensure good heat dissipation. Make sure the installation site meets the following conditions: Not in areas where highly flammable materials are stored. • Not in potential explosive areas. •...
Page 21: Mounting Instructions
Never install the inverter horizontally, or with a forward tilt or with a backward tilt or even with upside down. The horizontal installation can result in damage to the inverter. Install the inverter upright or at a maximum back tilt of 15 degrees to facilitate heat dissipation. 5.2 Mounting Instructions Installation Tools (recommended but not limited to the following ones):...
Page 22 Mounting the Inverter Step1: Drill holes on the wall Locate the appropriate drilling • holes and mark it with a marker pen. Drill holes with driller, make sure • the holes are deep enough (at least 50mm) to support the inverter.
Page 23 Step 5: Final Assembly After connecting all wirings, please put bottom cover back by screwing four screws as shown below.
Page 24: Electrical Connection
Electrical Connection This chapter mainly describes the cable connections of the system. Prior to any electrical connections, keep in mind that the inverter has dual power supplies. It is mandatory for the qualified personnel to wear personal protective equipments (PPE) during the electrical work. Danger to life due to a high voltage inside the inverter! •...
Page 25: Pv Connection
6.1 PV Connection Please only use the PV connectors from the accessory box for connection. Before connecting, please make sure: The voltage, current and power ratings of the panels to be • connected are within the allowable range of the inverter. Ensure polarity is correct.
Page 26 Step1: Remove an appropriate length of the insulation layer from the positive and negative power cables using a wire stripper. Step2. Insert the exposed areas of the positive and negative power cables into the metal terminals of the positive and negative connectors respectively and crimp them using a crimping tool.
Page 27 Step3: Step4: PV1 connection...
Page 28 PV2 connection...
Page 29: Ac Input / Output Connection
6.2 AC Input / Output Connection The grid voltage and frequency must be in the permissible • range. An external AC breaker (≥25A@GF1-3K48S1, ≥40A@GF1- • 5K48S1) must be installed between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input.
Page 30 Insert the conductors to the corresponding terminal and • crimp them. Pull cables outward to check whether they are firmly • installed. Step 2: Installing the AC Connector Insert AC input wires according to polarities indicated on • terminal block and tighten the terminal screws. Then, insert AC output wires according to polarities •...
Page 31 AC input connection: AC output connection:...
Page 32 Note: It is important to make sure that the combined power required for all devices connected to this output does not exceed the power rating of the inverter. Earth connection essential before connecting supply • Be sure that AC power source is disconnected before attempting to •...
Page 33: Battery Connection
48V. • For lithium batteries, this inverter can only be connected with LIVOLTEK or Pylontech low-voltage lithium batteries with nominal voltage from 40V to 60V now. If you choose other lithium batteries, please consult LIVOLTEK for compatibility.
Page 34 5KVA 2AWG 33.63mm² 80V/125 A 3N·m 6.3.1 Wiring Procedure 1. Remove insulation sleeve 12-16 mm for positive and negative conductors. 2. Insert the exposed areas of the positive and negative power cables into the metal terminals of the positive and negative connectors respectively and crimp them using a crimping tool.
Page 35 Installation must be performed with care due to high battery • voltage in series. Do not place anything between the flat part of the inverter • terminal and the ring terminal. Otherwise, overheating may occur. Do not apply anti-oxidant substance on the terminals before •...
Page 36 BMS Pin Definition NOTICE The BMS Pin Definition for battery from the Pylontech and • LIVOLTEK are different. Make sure the right wire sequence, otherwise will cause failure. • BMS Pin Definition for Lithium Battery from LIVOLTEK BMS Pin Definition...
Page 37 6.3.3 NTC Communication for Lead-acid battery The inverter has integrated a NTC temperature sampling port for lead-acid batteries. With the external NTC cable installed, it can sample the temperatures of the battery cabinet to avoid damage caused by low or high temperature. The protective temperature of lead-acid battery ranges from -25°...
Page 38: Dry Contact Signal For Generator
6.4 Dry Contact Signal for Generator GF1 series inverter has the function of being able to connect to the generator, and the generator function provides the system function of uninterrupted power supply for some areas with long-term power outages. GF1 series inverter is connected to the generator through a dry contact (3A/250VAC) on the back panel of the inverter.
Page 39: Wifi & Lan Module Connection (Optional)
6.5 WIFI & LAN Module Connection (Optional) WIFI & LAN 2 in 1 module implements communication with LIVOLTEK • Cloud server through wireless or Ethernet network to monitor inverter's data status. (If necessary, purchase it from Livoltek) • Monitoring module connection diagram Wiring Connection Procedure：...
Page 40 Plug one end of the flat cable (A) into the Wi-Fi & LAN 2 in1 Board and the • other end (B) into the left plug on the communication board. Check the Wi-Fi & LAN 2 in1 Board and the inverter are well connected. Then •...
Page 41: External Lcd Display (Optional)
6.6 External LCD Display (Optional) LCD Display indicates the operating status and input/output power the information of the inverter. You can also set the parameters on it. Please follow user manual of LCD Display panel for the detailed wire connection. LCD display connection diagram: Wiring Connection Procedure：...
Page 42: Parallel Connection (Optional)
6.7 Parallel Connection (Optional) Parallel connection function of the inverter is a solution for system capacity extension to provide bigger power. This inverter supports multi Parallel operation in 1-Phase or 3-Phase (needing to purchase additional parallel kits). For more details, please refer to the parallel instructions.
Page 43: System Operation
System Operation 7.1Powering ON the Inverter Step 1: Switch ON the DC and AC circuit breaker Wait a few seconds and the inverter will start a self-test procedure when the indicator light flashes, when it is done successfully, the green led should be solid on and the graphical display should start displaying.
Page 44: Leds Display
After the inverter powers off the remaining electricity and heat may till cause electrical shock and body burns. Please only begin servicing the inverter ten minutes after the power-off. 7.3 LEDs Display The inverter operation status can be obtained from observing LED indicator status.
Page 45 For more details, refer to Table LED indicator status below. Error Message GRID LOAD BATTERY GRID LOAD SYSTEM FAULT ★ ★ Starting up Normal status ● ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ WI-FI ● ◎ ◎ ◎ ◎ ◎...
Page 46: App Operation
IOS or Android to achieve real-time display and remote control. WEB: https://www.livoltek-portal.com/ APP: Search for Livoltek on Apple App Store, Google Play and download the latest installation package. 8.1 User interface on the APP Notes: The advanced setting and Maintenance settings can only be check and set via local mode or Web.
Page 47: Wifi Configuration
Power on inverter • Power on router and check the wireless networks that your • mobile phone joined Open the LIVOLTEK APP • ❶ Click on "Local Mode* ". ❷ Click on "Bluetooth Mode". ❸ Find your inverter ("BLF-GF- xxxx* ").
Page 48 * Local real-time monitoring via Bluetooth. * Refers to the last four digits of inverter's SN. * If it’s not possible to connect to the wireless network, or you do not want to do so, select the “Ethernet” to connect by LAN connection.
Page 49: Register An Account
8.3 Register an account Open the app or web and login with the username & password. Register it first if you don’t have an account, which provides access to the remote monitoring and management. NOTICE There are two different accounts for end users and business •...
Page 50: Create A Site And Add The Inverter To The Site
8.4 Create a site and add the inverter to the site You can edit the site (PV Plant) information, add the new inverter to the site, delete the site, expand the list of added inverters of the site and set the electricity price. 8.4.1 Add Site •...
Page 51 • Set local electricity price to calculate grid-connected revenue and electricity saved. • Choose your region and account to create a sub account for target user. Notes: The time frame must be 24 hours in Tariff settings. 8.4.3 Add Device •Touch "Add"...
Page 53: Settings On The App
8.5 Settings on the APP 8.5.1 Home Page Overview You can check Parameters of System. The status and data on this page might be a few minutes delay from the real-time inverter data By touch the icons on the diagram, it will show the historical data of each part.
Page 54 8.5.2.2 Select Battery type and Work Modes In the battery type, you can choose proper capacity lead acid battery with a nominal voltage at 48V. And you need to choose battery type as “Lead-acid”. If you choose lithium battery, you are allowed to use the lithium battery only which we have configured.
Page 55 8.5.3 Advanced Settings Advanced settings is generally customization for lead-acid battery and protection value of grid. Please contact your installer or factory and enter the installer password. Notes: All the settings must be 100% honest to the battery specifications first.
Page 56: Lcd Operation
LCD Operation The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. Object Name Description Display inverter information on the LCD Screen display. ESC button: Return from the current interface or function. Up button: Move the cursor to the upper part or increase the Down button: Move the cursor down or Function...
Page 57 ➣ Menu The menu is another interface for users to change settings or obtain information. - When the LCD displays the main interface, click "OK" to enter this interface. - The user can select up and down the menu, and press the "OK" key to confirm.
Page 58 AC Input Users can view the voltage/current/power/ frequency input by the grid here. AC Input Voltage: 0.0V Current: 0.0A Power: 0.0W Frequency: 0.0Hz Solar Users can see the voltage/current/power/frequency on the PV side here. Solar Voltage: 0.0V Current: 0.0A Power: 0.0W Battery Users can check the battery voltage/current/power/capacity/temperature.
Page 59 Fault Users can view the recent 7errors reported by the inverter here. Fault EPS Over Load Inter Temp High EPS Over Load EPS Volt Fault AC Freq Fault Inter Temp High EPS Over Load ➣ History The history data contains five pieces of information: on-grid power of the inverter, off- grid power generation, power of the meter /CT and error Error logs.
Page 60 Battery discharge yield Users can check the discharge yield of the battery here. Battery Discharge Yield Today: 0.0 Kw.h Month: 0,0 Kw.h Total: 1000.0Kw.h Error logs Users can see the most recent seven error logs. Error logs EPS Volt Fault AC Freq Fault ➣...
Page 61 Languages This inverter provides multiple languages for customers to choose. Languages English Basic The user can set the basic settings of the inverter here, such as: the battery type with the inverter, the working mode of the inverter, whether the power saving function of the inverter is turned on, whether the clock of the inverter is turned on, and the inverter Ethernet selection.
Page 62 Economic Mode Work Mode Economic Mode Backup Mode Economic Mode E-CutOffSoc: 60% E-CutOffVol:48V Alarm Control Users can turn on the alarm control function of the inverter here. This function is turned off by default. Alarm Control Alarm on Alarm off Ethernet Users can set the IP link mode of the WiFi module here.
Page 63 ➣ Advanced setting Users can enter the advanced settings to set the range of grid input voltage, output power to grid voltage, output power to grid frequency, lead-acid battery parameter settings, advanced settings password change, inverter factory reset, inverter's Firmware version. Advanced setting Input voltage range Output voltage...
Page 64 Output frequency The user can select the frequency here according to the local grid standard. Output frequency 50Hz 60Hz ➣ Lead-acid Users can set the Absorption charge voltage, Absorption charge time, float charge voltage, DC minimum cut-off voltage, charge and discharge current, and battery balance of the lead-acid battery here.
Page 65 Battery Equalization Battery Battery Equalization Battery Equalization Time Equalization Voltage Enable 60min Disable 42.0V Battery Equalization Equalization Interval Timeout 30days 120min Change password Users can change the password here, (used by the installer, not allowed to change at will) Change password Restore User can set inverter restoration here.
Page 66 Restore Update select Users can set up the inverter and battery firmware upgrade by inserting the U disk here. Update select File List Updating DSP1_ver.00 Updating now… DSP1 DSP1_ver1.01.hex Please don’t shot DSP2 DSP2.ver1.02.hex machine ➣ Restart Users can restart the inverter here. Restart History clear ➣...
Page 67: Troubleshooting
Troubleshooting This chapter is a guide for troubleshooting problems of GF series inverters. When the inverter has an exception, its basic common warning and exception handling methods are shown in the table below. Explanation/Possible Error Message Suggestion causes Check if voltage and number of PV PV input voltage is not PV over Volt modules are meet requirements and...
Page 68 1. Wait for a while to check if it can BUS Voltage(AC Side) is Inter CKT Fault automatically recover to the normal too high. operating status after the fault is Over current fault detected Inter CKT Fault rectified. by software. 2.Restart the inverter,If the problem Inverter current remains, please contact your dealer for...
Page 69 BMS Communication lost. 3.Reconnect the BMS cable,If the problem remains, please contact your dealer for technical support. 1.Check if the firmware version is correct from LCD or Livoltek-portal. Software version Firmware Fault 2.Restart inverter, If the problem incompatibility remains, please contact your dealer for...
Page 70 1.Re-charge battery. The battery voltage is too Low battery 2.If the problem remains, please contact low. your dealer for technical support. Over current occurs during Inter CKT Fault battery charging or discharging. BUS Voltage(Middle) is too Inter CKT Fault high. Inter CKT Fault Internal Relay failed Internal EEPROM...
Page 71: Technical Data
Technical Data Model GF1-3K48S1 GF1-5K48S1 PV Input Recommended max. PV power (Wp) 3300 5500 Max. Open Circuit Voltage (V) MPP Range Voltage (V) 90~480 Max. PV Current (A) Max. Short Circuit Current (A) 31.25 No. of MPPTs/Strings per MPPT AC Input...
Page 72 THDv (@linear load) <3% Battery & Charger Battery Type Lead-acid/Lithium Rated Battery Voltage(V) Charging Algorithm 3-Step Communication with BMS Solar Charger Type MPPT Max. Solar Charging Current (A) Max. AC Charging Current (A) Max. Charging Current (A) General Data Demensions(W*H*D mm) 330*535*130 Weight (kg) Ingress Protection...
Page 73: Disclaimer
. Inverter is changed, updated or disassembled on hardware or software without authority from Livoltek. . Obtain the communication protocol from other illegal channels. . Build monitoring, control system without authority from Livoltek. . Livoltek will keep right to explain all the contents in this user manual.
Page 74: Warranty Card Registration
Warranty Card Registration Dear customer, thank you for choosing LIVOLTEK product. For registering product warranty, please prepare everything ready and register on https://www.livoltek.com/registration.html. Product Information Product Type Product S/N Installation date Installation Company Personal Information Your name Your contact number...
Page 75 Contacts Hangzhou Livoltek Power Co., Ltd Address: 1418-35 Moganshan Road, Hangzhou, 310011, China Tel: +86-571-28330320 Fax: +86-571-28020357 Email: info@livoltek.com Web：www.livoltek.com...

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