Sofar SOFAR1.1KTL2-G3 User Manual
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Sofar SOFAR1.1KTL2-G3 User Manual

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USER
MANUAL
SOFAR 1~4KTL2-G3
Shenzhen SOFARSOLAR Co., Ltd.
Shenzhen SOFARSOLAR Co., Ltd.

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Summary of Contents for Sofar SOFAR1.1KTL2-G3

  • Page 1 USER MANUAL SOFAR 1~4KTL2-G3 Shenzhen SOFARSOLAR Co., Ltd. Shenzhen SOFARSOLAR Co., Ltd.
  • Page 2 Shenzhen SOFARSOLAR Co., Ltd. Shenzhen SOFARSOLAR Co., Ltd. 11/F, Gaoxinqi Technology Building, District 67, XingDong Community, XinAn Street, Bao’An District, Shenzhen, China SOFARSOLAR GmbH Krämerstrasse 20 72764 Reutlingen Germany Email: service.uk@sofarsolar.com service@sofarsolar.com Web: www.sofarsolar.com Document number Issue 01 / 01.2024 English...

  • Page 3: Table Of Contents

    Content Content Basic Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 .1 Safety instructions .
  • Page 4 Operation interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6 .1 Operation and Display Panel .
  • Page 5 Scope of Validity This product manual describes the installation,electrical connections, commissioning, maintenance and troubleshooting of SOFAR 1~4KTL2-G3 inverters:1.1KTL2-G3, 1.6KTL2-G3, 2.2KTL2-G3, 2.7KTL2-G3, 3KTL2-G3, 3.3KTL2-G3, 4KTL2-G3 Keep this manual where it will be accessible at all times.
  • Page 6 “Attention” indicates there are potential risks, if fail to prevent, may lead to equipment cannot normally or property damage. NOTE NOTE − “Note” provides additional information and tips that are valuable for the optimal operation of the product. 2/67 SOFAR 1~4KTL2-G3...

  • Page 7: Basic Safety Information

    Basic Safety Information Basic Safety Information Outlines of this Chapter Please read the instruction carefully. Faulty operation may cause serious injury or death. If you have any question or problem when you read the fol- NOTICE NOTICE lowing information, please contact Shenzhen SOFARSOLAR CO., Ltd.
  • Page 8 DANGER DANGER − Before the electrical connection, make sure to use opaque material to cover the PV modules or to disconnect PV array DC switch. Exposure to the sun, PV array will produce a dangerous voltage! 4/67 SOFAR 1~4KTL2-G3...
  • Page 9 Basic Safety Information WARNING WARNING All operation must accomplish by certified electrical engineer . − Must be trained; − Completely read the manual operation and understand all information ATTENTION ATTENTION − Get permission from the local electrical gird operator, complete all electri- cal connections by professional electrical engineer, then connect inverter to electrical grid.

  • Page 10: Symbols And Signs

    PV system and personnel security. Ensure input DC voltage < Max. DC voltage .Over voltage may WARNING WARNING cause permanent damage to inverter or other losses, which will not be included in warranty! 6/67 SOFAR 1~4KTL2-G3...
  • Page 11 Basic Safety Information Signs on the Product and on the Type Label There are some symbols which are related to security on the inverter. Please read and understand the content of the symbols, and then start the installa- tion. Symbol Description There is a residual voltage in the inverter! Before opening the equipment, operator should wait for five minutes to ensure the...

  • Page 12: Product Characteristics

    Product Characteristics Product Characteristics Outlines of this Chapter Product Dimensions Product Dimensions It introduces the field of use, and the overall dimensions of SOFAR 1~4KTL2-G3 inverters. Function Description Function Description It introduces how SOFAR 1~4KTL2-G3 inverters work and the function modules inside.
  • Page 13 SOFAR 1.1KTL2-G3, SOFAR 1.6KTL2-G3, SOFAR 2.2KTL2-G3: 303mm×260.5mm×118mm SOFAR 2.7KTL2-G3, SOFAR 3KTL2-G3, SOFAR 3.3KTL2-G3: 321mm×260.5mm×131.5mm SOFAR 4KTL2-G3: 321mm×260.5mm×151.5mm Figure 2-2 Front view and left view dimensions of SOFAR 2.2KTL2-G3 Figure 2-3 Front view and left view dimensions of SOFAR 3.3KTL2-G3 Installation and User Manual 9/67...

  • Page 14: Function Characteristics

    Product Characteristics Figure 2-4 Front view and left view dimensions of SOFAR 4KTL2-G3 Figure 2-5 Bracket dimensions of SOFAR 1~4KTL2-G3 The labels must NOT be hidden with objects and extraneous parts (rags,box- es,equipment,etc.);they must be cleaned regularly and kept visible at all times.
  • Page 15 Product Characteristics converted to AC power by Power Board. AC power is filtered through Output Board then AC power is fed into the grid. Output Board also offer functions such as grid voltage / output current detection, GFCI and output isolation relay. Control Board provides the auxiliary power, controls the operation state of in- verter and shows the operation status by Display Board.

  • Page 16: Efficiency Curve

    Product Characteristics Electrical Block Diagram Figure 2-6 Electrical block diagram Efficiency curve 12/67 SOFAR 1~4KTL2-G3...

  • Page 17: Installation

    Installation Installation Outlines of this Chapter This topic describes how to install the SOFAR 1~4KTL2-G3. DANGER DANGER − Do not install the product on flammable material. − Do not store this product in potentially explosive atmospheres. CAUTION CAUTION − The enclosure and heat sink will get hot during operation, please do not mount the product at a easy to reach location.

  • Page 18: Installation Process

    Check the outer packing materials for damage, such as holes and cracks. If any damage is found, do not unpack the SOFAR 1~4KTL2-G3 and contact the deal- er as soon as possible. You are advised to remove the packing materials within 24 hours before installing the SOFAR 1~4KTL2-G3 inverter.

  • Page 19: Product Overview

    1pcs Stick Logger 1pcs Product Overview SOFAR 1~4KTL2-G3 inverter is 100% strictly inspected before package and delivery. It is forbidden to put the SOFAR 1~4KTL2-G3 inverter upside down during delivery. Please check the product package and fittings carefully CAUTION CAUTION before installation.

  • Page 20: Tools

    Installation Figure 3-2 SOFAR 1~4KTL2-G3 inverter overview Table 3-2 SOFAR 1~4KTL2-G3 inverter overview DC Switch Breather valve PV input terminals USB/DRMs/RS485/CT WiFi/GPRS/Ethernet Grid connection port Tools Prepare tools required for installation and electrical connection as following table: Table 3-3 Installation tools...

  • Page 21: Determining The Installation Position

    Safety goggles tory mask Determining the Installation Position Determine an appropriate position for installing the SOFAR 1~4KTL2-G3 invert- er. Comply with the following requirements when determining the installation position: Install vertical or backward tilt within 0-75°, Do not install forward or upside...
  • Page 22 Installation Figure 3-3 SOFAR 1-4KTL2-G3 inverter installation location selection 18/67 SOFAR 1~4KTL2-G3...

  • Page 23: Moving Of Inverter

    Manual handling This topic describes how to move the to the installation position Horizontally SOFAR 1~4KTL2-G3. Open the packaging, insert hands into the slots on both sides of the inverter and hold the handles, as shown in Figure 3-6 and Figure 3-7.

  • Page 24: Installation

    Installation Lift the SOFAR 1~4KTL2-G3 from the packing case and move it to the instal- lation position. ATTENTION ATTENTION − To prevent device damage and personal injury, keep balance when moving the inverter because the inverter is heavy. − Do not put the inverter with its wiring terminals contacting the floor be- cause the power ports and signal ports are not designed to support the weight of the inverter.
  • Page 25 Installation Hook the inverter to the rear panel. Using an M5 screw to secure the invert- er to the rear panel to ensure safety. You can secure the inverter to the rear panel and protect if from stealing by installing an anti-theft lock (this action is optional). Installation and User Manual 21/67...

  • Page 26: Electrical Connections

    Therefore, before connecting DC input power cable, cover PV modules using opaque clot. NOTE NOTE − For SOFAR 1~2.2KTL2-G3,open-circuit voltage(Voc) of module arrays con- nected in series must be ≤ 500V; For SOFAR 2.7K~4KTL2-G3, it must be ≤ 550V. 22/67 SOFAR 1~4KTL2-G3...

  • Page 27: Electrical Connection

    Electrical Connections The connected PV modules must have an IEC 61730 Class A ratin IscPV(absolute maximum) Maximum output over current SOFAR1.1KTL2-G3 5.3A protection SOFAR1.6KTL2-G3 7.7A SOFAR2.2KTL2-G3 10.6A SOFAR2.7KTL2-G3 SOFAR3KTL2-G3 14.5A SOFAR3.3KTL2-G3 SOFAR4KTL2-G3 19.3A The decisive voltage class(DVC) The DVC is the voltage of a circuit which occurs continuously between any two live part in the worst-case rated operating condition when used as inten- ded.

  • Page 28: Connecting Pgnd Cables

    Procedure: Procedure: Remove the insulation layer with an appropriate length using a wire strip- per, as shown in Figure 4-2. Figure 4-2 Preparing a ground cable (1) The length of L2 should 2~3mm higher than L1. 24/67 SOFAR 1~4KTL2-G3...
  • Page 29 Electrical Connections Insert the exposed core wires into the OT terminal and crimp them by using a crimping tool, as shown in Figure 4-3. Figure 4-3 Preparing a ground cable (2) 1. L3 is the length between the insulation layer of the ground cable and the crimped part.L4 is the distance between the crimped part and core wires protruding from the crimped part.

  • Page 30: Connecting Dc Input Power Cables

    Ensure that the cables are crimped until they cannot be pulled out by force less than 400 N, as shown in Figure 4-6. Figure 4-6 Connecting DC input power cables 26/67 SOFAR 1~4KTL2-G3...
  • Page 31 Electrical Connections Insert crimped power cables into corresponding housings until you hear a “click” sound. The power cables snap into place. Reinstall cable glands on positive and negative connectors and rotate them against the insulation covers. Insert the positive and negative connectors into corresponding DC input terminals of the inverter until you hear a “click”...

  • Page 32: Connecting Ac Output Power Cables

    If an external RCD is required, a type-A RCD with rated residual current of 100mA or higher is suggested. Connect the SOFAR 1~4KTL2-G3 to the AC power distribution frame (PDF) or power grid using AC output power cables. It is not allowed for several inverters to use the same circuit breaker.
  • Page 33 Electrical Connections Multi core copper wire AC cable should be correctly sized to ensure the power loss in AC cable is less than 1% of the rated power. If the resistance of the AC cable is too high, it will cause a huge increase in the AC voltage, which may lead to a disconnection of the inverter from the electrical grid.
  • Page 34 AC output cable using a wire stripper according to the figure shown below: Figure 4-12 Disassemble the AC connector according to the figure shown below: insert the AC output cable (with its insulation layer stripped according to step 1) through the waterproof locking cable gland; Figure 4-13 30/67 SOFAR 1~4KTL2-G3...
  • Page 35 Electrical Connections Connect AC output cable as per the following requirements: Connect the yellow-green wire to the hole labeled “PE”, fasten the wire using an Allen wrench; Connect the brown wire to the hole labeled “L”, fasten the wire using an Allen wrench;...

  • Page 36: Rs485,Ct,Inverter Logic Interface Connection

    Hold the button to Figure 4-17 Make sure the grid is disconnected before removing the AC CAUTION CAUTION connector. RS485,CT,inverter logic interface connec- tion The communication interface location of the SOFAR 1~4KTL2-G3 is shown in the figure below. 32/67 SOFAR 1~4KTL2-G3...
  • Page 37 Electrical Connections Figure 4-18 Table 4-3 Recommended communication cable size are shown below, The wiring methods are the same for RS485 and CT, this part describes their wiring methods and logic interface wiring method. Communication function RS485 Cable size 0.5~1.5mm² 0.5~1.5mm²...
  • Page 38 Table 4-4 Function description of the communication terminals Type RS485 Logic interface Connector FRONT Label CT- CT+ The following table Function RS485 RS485 CT- CT+ differential signal- differential signal+ 34/67 SOFAR 1~4KTL2-G3...
  • Page 39 Electrical Connections TX+ TX- CT+ CT- Figure 4-21 The logic interface pin definitions and circuit connections are as follows: The function of logical interface needs to be set on the display screen, please refer to the operation steps in section 6.3 . A.
  • Page 40 Relay contact 4 input K4 - Relay 4 output Relays common node Not Connected Not Connected Not Connected Not Connected Not Connected Not Connected Table 4-7 The inverter is preconfigured to the following RRCR power levels Relay status: close is 1, open is 0 36/67 SOFAR 1~4KTL2-G3...
  • Page 41 Electrical Connections Active Power Cos(φ) 100% C. Logic interface for EN50549-1:2019, is in order to cease active power out- put within five seconds following an instruction being received at the input interface. RRCR FRONT Figure 4-23 Inverter – RRCR Connection Table 4-8 Function description of the terminal Pin NO .

  • Page 42: Wifi/Gprs Module Installation Procedure

    1. 1. Remove WiFi/GPRS waterproof cover using screw driver. Install WiFi/GPRS module. Fasten WiFi/GPRS module using screws. Communication method SOFAR 1~4KTL2-G3 gird-connected inverters offer RS485 (standard) and Wi-Fi (optional) communication modes: A.Communication between one inverter and one PC: 1. RS485 38/67...
  • Page 43 Electrical Connections Refer to the figure shown below, connect the TX+ and TX- of the inverter to the TX+ and TX- of the RS485-USB adapter, and connect the USB port of the adapter to the computer. (NOTE1) Figure 4-26 2.WI-FI Refer to the figure shown below: (wireless function required for the PC) .
  • Page 44 1. The length of the RS485 communication cable should be less than 1000 2. When multiple inverters are connected via RS485 wires, set mod-bus ad- dress to differentiate the inverters. 3. S/N number of the Wi-Fi module is located on the side. 40/67 SOFAR 1~4KTL2-G3...

  • Page 45: Commissioning Of Inverter

    1. 1. Turn ON the DC switch. Turn ON the AC circuit breaker. When the DC power generated by the solar array is adequate, the SOFAR 1~4KTL2-G3inverter will start automatically. Screen showing “normal” indicates correct operation. Choose the correct country code. (refer to section 6.3 of this manual) Notice: Different distribution network operators in different countries have dif- ferent requirements regarding grid connections of PV grid connected inverters.
  • Page 46 If the inverter indicates any fault, please refer to Section 7.1 of this manual —— trouble shooting for help. The inverter can monitor the power grid in real time,The protection can be realized when the power grid is abnormal, so that the inverter is separated from the power grid. 42/67 SOFAR 1~4KTL2-G3...

  • Page 47: Operation And Display Panel

    Operation Operation Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 1~4KTL2-G3 Inverter. Operation and Display Panel Buttons and Indicator lights Button: Long press the button to enter the next menu or confirm the selection...

  • Page 48: Standard Interface

    Inverter working status, total generat- erated electricity ed electricity Inverter working status, grid voltage Inverter working status, grid voltage and current and frequency Inverter working status, Wi-Fi/ Inverter faulty alarm RS485 status When power-on, LCD interface displays INITIALIZING, refer below picture 44/67 SOFAR 1~4KTL2-G3...

  • Page 49: Main Interface

    Operation When control board successfully connected with communication board, the LCD display the current state of the inverter, display as shown in the figure below Wainting states ,Countdown 10S (depends country code some are 60s) Checking Normal power generation Regular error Unrecoverable state error state...
  • Page 50 12.Set Safety Voltage Long press the button to Enter the main interface of “1. Enter Setting” and long press to enter the setting menu. You can select the content you want to set by short pressing the button. 46/67 SOFAR 1~4KTL2-G3...
  • Page 51 Operation Some settings need to enter the password (the default password is 0001), when entering the password, short press to change the number, long press to confirm the current number, and long press after entering the correct password. If „password error, try again“ appears, you will need to re-enter the correct password.
  • Page 52 Slovakia VSD EU EN50438V Romania Slovakia SSE IEC EN61727 Spain-NTS631 Slovakia ZSD Korea 127* Spain- UNE217002 CEI0-21 In Areti Sweden Spain-island Ukraine Europe General Franc-VFR-2019 Brazil LV CEI0-21 External Latvia Mexico LV Cyprus Tunisia FAR Arrete23 India CY-LV-RES 48/67 SOFAR 1~4KTL2-G3...
  • Page 53 Default 01. Set Input mode The input modes of the SOFAR inverter are divided into parallel mode and independent mode (when multi-channel MPPT is input) . Since SOFAR 1 ~ 4KTL2-G3 has only one group of MPPT input, the input modes are not distin- guished.
  • Page 54 Event will be listed by the happening time, and recent events will be listed in the front. Please refer to below picture. Long press the button and short press the button to turn the page in standard interface, then enter into “2.Event List” interface. 50/67 SOFAR 1~4KTL2-G3...
  • Page 55 Operation 2 . Event List 1. Current event 2. History event Fault information 001 ID04 06150825 (Display the event sequence number, event ID number, and event occurrence time) C. “SystemInfo” Interface as below SystemInfo Long press the button 1.Inverter Type 8.Power Factor 2.Serial Number 9.Reflux Power...
  • Page 56 Operation Updating Inverter Software SOFAR 1~4KTL2-G3 inverters offer software upgrade via USB flash drive to maximize inverter performance and avoid inverter operation error caused by software bugs. Turn off the DC and AC breaker, and then remove the communication wa- terproof cover as the following picture.

  • Page 57: Trouble Shooting

    Trouble shooting Trouble shooting Outlines of this chapter This topic describes how to perform daily maintenance and troubleshooting to ensure long term proper operation of the inverter. Troubleshooting This section contains information and procedures for solving possible problems with the inverter. A.
  • Page 58 If yes, adjust the number of series connected PV modules to increase the voltage of the PV string to fit the input voltage range of inverter. inverter auto- matically returns to normal operating status after correct adjustments. 54/67 SOFAR 1~4KTL2-G3...
  • Page 59 Trouble shooting Name Name Description Description Solution Solution Check whether the grid volt- Vlvrtlow LVRT function is age fluctuates greatly. faulty Vovrthigh OVRT function is faulty Check whether too many PV PVOVP The input voltage is modules are series connected too high in a PV string, thus the volt- age (Voc) of the PV string is...
  • Page 60 GFCI Device The GFCI sampling Fault error MChip_Fault The master chip fault Hw Aux Power The auxiliary voltage Fault error Bus Volt Zero The bus voltage Fault sampling error HwADErrIdc Dc input current sampling error 56/67 SOFAR 1~4KTL2-G3...
  • Page 61 Trouble shooting Name Name Description Description Solution Solution If the PV array configuration Bus UVP The bus voltage Is is correct (no ID05 fault) , the too low possible cause is that the solar irradiance is too low. inverter automatically returns to normal operating status after the solar irradiance returns to normal level.
  • Page 62 After receiving the meter com- MeterCommLose Meter communica- munication exception bit sent tion error down by the ARM, and when the safety country is Australia, a meter error is reported; 58/67 SOFAR 1~4KTL2-G3...
  • Page 63 Trouble shooting Name Name Description Description Solution Solution ID65-ID70 are internal faults Hw Ac OCP1 The grid current is of inverter, turn OFF the “DC too high, and has switch”, wait for 5 minutes, cause unrecover- then turn ON the “DC switch”. able hardware fault Check whether the fault is rectified.
  • Page 64 SPD Alarm Lightning protec- is damaged and contact the tion tripped technician for help. Contact technical support to SW version The software in the upgrade software. Fault control board and the communication board is not consis- tent 60/67 SOFAR 1~4KTL2-G3...

  • Page 65: Maintenance

    Trouble shooting Name Name Description Description Solution Solution ID95~ID96 are internal faults Comm EEPROM The communication of inverter, turn OFF the “DC Fault board EEPROM is switch”, wait for 5 minutes, fault then turn ON the “DC switch”. Check whether the fault is RTC Fault RTC clock chip is rectified.

  • Page 66: Technical Data

    Technical Data Technical Data Outlines of this chapter This topic lists the technical specifications for all SOFAR 1~4KTL2-G3 inverters. Input Parameters (DC) SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 1 .1KTL2-G3 1 .6KTL2-G3 2 .2KTL2-G3 2 .7KTL2-G3 3KTL2-G3 3 .3KTL2-G3...

  • Page 67: Output Parameters (Ac)

    Technical Data Output parameters (AC) SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 1 .1KTL2-G3 1 .6KTL2-G3 2 .2KTL2-G3 2 .7KTL2-G3 3KTL2-G3 3 .3KTL2-G3 4KTL2-G3 Rated Output 1100W 1600W 2200W 2700W 3000W 3300W 4000W power Max.Output 1100VA 1600VA 2200VA 2700VA...

  • Page 68: Efficiency,Protection And Communication

    External envi- Degree 3 ronment pol- lution degree Over voltage PV:OVC II, AC mains:OVC III category Max inverter Back-feed current to the array Output short 200A/1us circuit current to the array Output inrush 0.8A/2us current and duration 64/67 SOFAR 1~4KTL2-G3...

  • Page 69: General Data

    Technical Data General Data SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 1 .1KTL2-G3 1 .6KTL2-G3 2 .2KTL2-G3 2 .7KTL2-G3 3KTL2-G3 3 .3KTL2-G3 4KTL2-G3 Transformerless Topology -30~60°C Ambient tem- perature range Permissible 0~100% humidity range Noise figure <25dB DC Switch...

  • Page 70: Quality Assurance

    Once the extended warranty service is purchased, our company will issue the extended warranty card to the customer to confirm the extended warranty period. Invalid warranty clause Equipment failure caused by the following reasons is not covered by the war- ranty: 66/67 SOFAR 1~4KTL2-G3...
  • Page 71 Quality Assurance 1. The “warranty card” has not been sent to the distributor or our company; 2. Without the consent of our company to change equipment or replace parts; 3. Use unqualified materials to support our company ‘s products, resulting in product failure;...

This manual is also suitable for:

Sofar1.6ktl2-g3Sofar2.2ktl2-g3Sofar2.7ktl2-g3Sofar3ktl2-g3Sofar3.3ktl2-g3Sofar4ktl2-g3

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