Sofar 255KTL-HV-TRO User Manual
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Sofar 255KTL-HV-TRO User Manual

Solar grid-tied inverter
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User manual
Solar Grid-tied Inverter
Product Model: SOFAR 255KTL-HV-TRO
S h e n z h e n S O FA R S O L A R C o . , L t d .

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Summary of Contents for Sofar 255KTL-HV-TRO

  • Page 1 User manual Solar Grid-tied Inverter Product Model: SOFAR 255KTL-HV-TRO S h e n z h e n S O FA R S O L A R C o . , L t d .

  • Page 2: Table Of Contents

    SOFAR 255KTL-HV-TRO User Manual Contents Preface ........................I Basic Safety Information ................- 1 - Requirement for Installation and Maintenance ......- 1 - 1.1. Symbols and signs ............... - 4 - 1.2. Product Characteristics ................. - 6 - Intended Use ................- 6 - 2.1.
  • Page 3 SOFAR 255KTL-HV-TRO User Manual Operation and Display Panel ............. - 46 - 7.1. Standard Interface ..............- 47 - 7.2. Main Interface ................- 50 - 7.3. Updating Inverter Software ............- 53 - 7.4. Trouble shooting and maintenance ............. - 55 - Troubleshooting .................

  • Page 4: Preface

    SOFAR 255KTL-HV-TRO User Manual Preface Notice The products, services or features you purchased shall be subject to the company's commercial contracts and terms. All or part of the products and services described in this document may not within the scope of your purchase. Unless additional terms and conditions in your contract, the company does not make any statement or guarantee on the contents of this document.
  • Page 5 SOFAR 255KTL-HV-TRO User Manual ⚫ Outline This manual is an integral part of SOFAR 255KTL-HV-TRO. It describes the assembly, installation, commissioning ,maintenance and failure of the product. Please read it carefully before operating. ⚫ Scope of Validity This manual contains important instructions for: SOAFR 255KTL-HV-TRO ⚫...

  • Page 6: Basic Safety Information

    This section gives an explanation of all the symbols shown on the inverter and on the type label. 1.1. Requirement for Installation and Maintenance Installation of SOFAR 255KTL-HV-TRO on-grid inverter must conform with laws, regulations, codes and standards applicable in the jurisdiction. Before installing and adjusting the produce, please read all of instructions,...
  • Page 7 Label and Symbols SOFAR 255KTL-HV-TRO has type label attach the side of product which contact important information and technical data, the type label must permanent attached to the product.
  • Page 8 SOFAR 255KTL-HV-TRO User Manual proper package. Transportation company should responsible for any damage during transport period. If you find any packing problems that may cause the damage of inverter or any visible damage, please notice the responsible transportation company immediately.

  • Page 9: Symbols And Signs

    SOFAR 255KTL-HV-TRO User Manual Inverter should not work again until removing all faults. If any repair work is required, please contact local authorized service centre. Should not open the inverter cover without authorized permit, Attention SOFARSOALR does not take any responsibility for that.
  • Page 10 SOFAR 255KTL-HV-TRO User Manual Signs on the Product and on the Type Label SOFAR 255KTL-HV-TRO has some safety symbols on the inverter. Please read and fully understand the content of the symbols before installation. Symbols Name Explanation After disconnect with the DC side, there...

  • Page 11: Product Characteristics

    Efficiency Curves Introduce the efficiency curves of the product. 2.1. Intended Use SOFAR 255KTL-HV-TRO is a transformerless on grid PV inverter, that converters the direct current of the PV array to the grid-compliant, three-phase current and feeds into the utility grid.
  • Page 12 SOFAR 255KTL-HV-TRO User Manual responsibility. Supported grid types Product Dimensions The choice of optional parts of inverter should be made by a qualified technician who knows the installation conditions clearly. Dimensions Description ⚫ SOFAR 255KTL-HV-TRO L× W× H=1100.5*713.5*368mm - 7 -...
  • Page 13 SOFAR 255KTL-HV-TRO User Manual Figure 2-2 Product front view and left view dimensions - 8 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 14: Function Description

    SOFAR 255KTL-HV-TRO User Manual Figure 2-3 Product back view and bracket dimensions ◆ Labels on the equipment Note: label must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.,); they must be cleaned regularly and kept visible at all times.
  • Page 15 SOFAR 255KTL-HV-TRO User Manual current detection, GFCI and output isolation relay. Control Board provides the auxiliary power, controls the operation state of inverter and shows the operation status by Display Board. Display Board displays fault code when inverter is abnormal operation conditions. At the same time, Control Board can trigger the replay to protect the internal components.

  • Page 16: Electrical Block Diagram

    2.3. Electrical block diagram SOFAR 255KTL-HV-TRO has 16-24 DC input strings. 8-12 MPPT trackers that converters the direct current of PV array to grid-compliant, three phase current and feeds in into the utility grid. Both DC and AC side has Surge Protection Device (SPD).

  • Page 17: Inverter Storage

    SOFAR 255KTL-HV-TRO User Manual 3. Inverter Storage If inverter is not installing immediately, storage condition need meet below requirements: ⚫ Place inverter into the original package and leave desiccant inside, sealed tight with taps. ⚫ Keep the storage temperature around -40℃～70℃, Relative humidity 0～...

  • Page 18: Installation

    SOFAR 255KTL-HV-TRO User Manual 4. Installation Outlines of this Chapter This topic describes how to install this product, please read carefully before install. Do NOT install the product on flammable material. Do NOT store this product in potentially explosive atmospheres.
  • Page 19 SOFAR 255KTL-HV-TRO User Manual parts were included in the packing, please contact your distributor immediately if anything missing or damage. Table 4-1Components and mechanical parts that inside the package Pictures Description Quantity SOFAR 255KTL-HV-TRO 1 pcs 1 pcs Rear Panel...

  • Page 20: Tools

    SOFAR 255KTL-HV-TRO User Manual M6*30 Hexagon screws 2 pcs 1 pcs Manual 1 pcs Warranty Card Outgoing inspection report 1 pcs Quality Certificate 1 pcs COM 16pin connector 1 pcs M12 Hand ring 2pcs 4.3. Tools Prepare tools required for installation and electrical connection as following table: - 15 - Copyright ©...
  • Page 21 SOFAR 255KTL-HV-TRO User Manual Table 4-2 Installation tools Tool Description Function Hammer Drill Recommend Used to drill holes on the wall drill @ 10mm Use to tighten and loosen screws when installing AC Screwdriver power cable Use to remove AC connectors...

  • Page 22: Determining The Installation Position

    SOFAR 255KTL-HV-TRO User Manual Connect AC connector Torque wrench Use to crimp cable on grid Crimping Tool side, load side extensive cable Check grounding cable, PV Multimeter positive and negative pole Marker Mark signs Measuring Measure distance Tape Ensure the rear panel is...
  • Page 23 SOFAR 255KTL-HV-TRO User Manual Note: Install vertical or backward tilt within 0-75° ,Do not install forward or upside down! Figure 4-1Installation Position Selection Figure 4-2Clearance for single inverter - 18 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 24 SOFAR 255KTL-HV-TRO User Manual Note: Other requirement for install position: ⚫ Install position should obstruct the disconnect of power. ⚫ Place inverter in an appropriate bearing capacity objects. ⚫ Location should be avoid touch by children. - 19 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 25: Moving Of Inverter

    SOFAR 255KTL-HV-TRO User Manual Figure 4-3 Clearance for multiple inverters 4.5. Moving of inverter 4.5.1 Manual handling Unload the inverter from package, horizontally move to the install position. When open the package, at least two operator insert the hands into the slots on both side of the inverter and hold the handles.
  • Page 26 SOFAR 255KTL-HV-TRO User Manual Keep the balance when lift the inverter. Required at least two operators for lifting or use forklift. Inverter is heavy, dropped while being transported may cause injuries. Do not put the inverter with wiring terminals contacting the floor because the power ports and signal ports are not designed to support the weight of the inverter.

  • Page 27: Installation

    SOFAR 255KTL-HV-TRO User Manual ground by using lifting equipment, check the tightening device of the hoisting ring and rope. After confirming that the binding connection is secure, lift the inverter to the destination. Keep balance when lifting the inverter, avoid to crash on wall or other objective.
  • Page 28 SOFAR 255KTL-HV-TRO User Manual Step 2: Insert the expansion bolt vertically into the hole. Figure 4-9 Screws into the holes Step 3: Align the rear panel with the hole positions, fix the rear panels on the wall by tightening the expansion bolt with the nuts.
  • Page 29 SOFAR 255KTL-HV-TRO User Manual Figure 4-11 Fix inverter 4.6.2 Bracket Installation： Step1: Use wall mount bracket, ensure the pole position are in same level by using level rule and take a mark with maker. Figure 4-12 Ensure hole position Step 2: Drilling hole by using Hammer Drill, recommend to do a stain proofing.
  • Page 30 SOFAR 255KTL-HV-TRO User Manual Figure 4-13 Drilling holes Step 3: Use M10 screw and M10 flat washer to secure the wall bracket（Note： M10*50 screw and M10 flat washer need self-preparation）. Figure 4-14 Fix wall bracket Step 4: Lift the inverter and hang it on the wall bracket,and fixing both side of inverter with M6 screw（repeat 4.6.1step 4）.
  • Page 31 SOFAR 255KTL-HV-TRO User Manual Note: If height between ground and bracket is less than 1.3m, use auxiliary handle for installation. Otherwise, use lifting equipment. Figure 4-15 Installation position of auxiliary handle - 26 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 32: Electrical Connection

    SOFAR 255KTL-HV-TRO User Manual 5. Electrical Connection Outlines of this Chapter This section introduces the electrical connection for the product. Please read the information carefully, it may helpful to understand the grounding wiring, DC input connection, AC output connection and communication connection.

  • Page 33: Electrical Connection

    SOFAR 255KTL-HV-TRO User Manual 5.7 Safety check Before operate inverter, check the PV array, inverter DC side safety connection and AC side safety connection. 5.1. Electrical Connection Figure 5-1 Flowchart for connecting cables to the inverter 5.2. Terminal Connector Connector description as below:...

  • Page 34: Grounding Connection (Pe)

    5.3. Grounding Connection (PE) Connect the inverter to the grounding electrode usingground cable SOFAR 255KTL-HV-TRO is a transformerless inverter which requires the positive pole and negative pole of the PV array are NOT grounded. Otherwise, it will cause inverter failure. In the PV system,...

  • Page 35: Connect Grid Side Of Inverter(Ac-Output)

    SOFAR 255KTL-HV-TRO User Manual Figure 5-3 Grounding connection instruction（2） Note 1: L3 is the length between the insulation layer of the ground cable and crimped part. L4 is the distance between the crimped part and core wires protruding from the crimped part.

  • Page 36: Wiring Terminal And Precautions

    SOFAR 255KTL-HV-TRO User Manual grid for protection. For external Residual Current Device (RCD), the rated residual current shall be 300mA or higher. Precondition： Inverter AC side should connect a three phase circuit current to ensure inverter can be cut off with utility grid for abnormal condition.
  • Page 37 SOFAR 255KTL-HV-TRO User Manual ⚫ Inverter can only connect to grid after get the permission from local grid company. ⚫ Should not connect any loads between inverter and AC circuit breaker. ⚫ OT/DT Requirement. ⚫ When use copper core cable, please use copper terminal connector.
  • Page 38 SOFAR 255KTL-HV-TRO User Manual Figure 5-7 AC Terminal size 5.4.4 Wring Procedure The section will use a four core wire as a sample, four core wire has same connection process. Table 5-1 Recommend AC cable size Name Type Area(mm² ) Recommended：Outdoor...
  • Page 39 SOFAR 255KTL-HV-TRO User Manual Step 5: Crimp the terminal. Step 5: Depending on the grid configuration, connect L1, L2, L3 and N to the terminals according to the label and tighten the screw on the terminal using a screwdriver. - 34 -...

  • Page 40: Connect The Power Cord Of The Tracking System (Optional)

    SOFAR 255KTL-HV-TRO User Manual Note： ⚫ Phase lines use M12 terminal connector, PE line use M8 terminal connector. 5.5. Connect the power cord of the tracking system (optional) be careful: ⚫ Between the inverter and the tracking control box, it is necessary to connect the protection disconnector fuse group or fuse disconnector.

  • Page 41: Connect Pv Side Of Inverter（Dc-Input

    SOFAR 255KTL-HV-TRO User Manual Step 1: use wire strippers to strip the insulation layer of the tracking power line to an appropriate length, as shown in the following figure. Step 2: thread the wire core stripped of the insulation layer into the conductor crimping area of the OT terminal and press it tightly with a crimping pliers.
  • Page 42 SOFAR 255KTL-HV-TRO User Manual conenctor connect to inverter negative pole. ⚫ Please use the connectors in the accessories bag. The damage cause byincorrect is not including in the warranty. Table 5-2 Recommend DC cable size ） Copper cable cross section area（mm...
  • Page 43 SOFAR 255KTL-HV-TRO User Manual Step 4: Measure PV voltage of DC input with multimeter, verify DC input cable polar and connect DC connector with inverter until hearing a slight sound indicated connection succeed. Figure 5-9DC cable connection Note：Please use multimeter to make sure the PV array positive pole and negative pole! Dealing：If need to remove the PV connector from inverter side, please use the...

  • Page 44: Communication Connection

    SOFAR 255KTL-HV-TRO User Manual Figure 5-10 Removal DC connector 5.7. Communication Connection Note：When layout the wiring diagram, please separate the communication wiring and power wiring in case the signal be affected. 5.6.1 USB/WIFI Port Port Description： USB：USB Port Use for updating the software...
  • Page 45 PC terminal or local data acquisition device, then uploaded to the server. Register remote monitoring of SOFAR 255KTL-HV-TRO at its relevant website or APP according to monitoring deviceSN. Figure 5-11 Connect one USB acquisition stick (WIFI version) to wireless router 5.6.2 COM—Multi function communication port...
  • Page 46 SOFAR 255KTL-HV-TRO User Manual RS485A Electric meter Electric meter Electric meter RS485 signal- RS485B GND.S RS485 signal ground DRM0 Remote shunt down DRM1/5 DRM2/6 DRMS port DRM3/7 DRM4/8 GND.S Communication Ground 14-16 Blank PIN Procedure： Communications Port Description Logic interface (a) Logic interface for AS/NZS 4777.2:2020, also known as inverter demand...
  • Page 47 SOFAR 255KTL-HV-TRO User Manual remains asserted. Table 4-3 Function description of the DRMs terminal Pin NO. Function DRM1/5 DRM2/6 DRM3/7 DRM4/8 DRM0 NOTE: Supported DRM command: DRM0, DRM5, DRM6, DRM7, DRM8. (b) Logic interface forEN50549-1:2019 and VDE-AR-N 4105:2018-11, is in order to cease active power output within five seconds following an instruction being received at the input interface.
  • Page 48 Figure 5-14 Picture of the RS485/USB converter and PC terminal If only one SOFAR 255KTL-HV-TRO is used, use a communication cable, refer to section 5.6.2 for COM pin definition, and choose either of the two RS485 ports.
  • Page 49 SOFAR 255KTL-HV-TRO User Manual 5.6.3PLC（Multi inverter monitoring system） Figure 5-16Multi inverter monitoring system - 44 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 50: Commissioning Of Inverter

    6.2. Start Inverter Step 1: Turn ON the DC switch. Step 2: Turn ON the AC circuit breaker. When the DC power generated by the solar array is enough, the SOFAR 255KTL-HV-TROinverter will start automatically. Screenshowing“normal”indicates correct operation. NOTE 1: Choose the correct country code. (refer to section 7.3 of this manual).

  • Page 51: Operation Interface

    SOFAR 255KTL-HV-TRO User Manual 7. Operation interface Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 255KTL-HV-TRO Inverter. 7.1. Operation and Display Panel Buttons and Indicator lights Button: “ ” Short press UP button = go up “...

  • Page 52: Standard Interface

    SOFAR 255KTL-HV-TRO User Manual 7.2. Standard Interface LCD interface indicated inverter status, alarm information, communication , grid voltage,current and frequency, connection, PV input current and voltage today ge neration, total generation. Inverter working status, PV 1 -12 PV input voltage and current...
  • Page 53 SOFAR 255KTL-HV-TRO User Manual Inverter working status, grid voltage and frequency Inverter working status, Wi-Fi/ RS485 status Inverter faulty alarm When power turn on, LCD interface displays Initializing, refer below picture. - 48 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 54 SOFAR 255KTL-HV-TRO User Manual When control board successfully connected with communication board, the LCD display the current state of the inverter，display as shown in the figure below. Inverter states includes: wait, check, normal, fault and permanent. Wait:Inverter is waiting to Check State when reconnect the system. In this state, grid voltage value is between the max and min limits and so on;...

  • Page 55: Main Interface

    SOFAR 255KTL-HV-TRO User Manual display interface as shown in the figure below. 7.3. Main Interface Long press the down button under standard interface to enter into main interface, Main interface including below information: Normal ---------Long press DOWN button 1.Enter Setting 2.Event List...
  • Page 56 Set the address (when you need to monitor multiple inverters simultaneously)， Default 01. 8. Set Input mode SOFAR 255KTL-HV-TRO has 8-12 MPPTs, these MPPTs can work interdependently, or divided into parallel mode. User can change the setting according to the configuration.
  • Page 57 SOFAR 255KTL-HV-TRO User Manual tracked. 13. PID Enable or disable PID function. When the PID module is enabled(enter the default password: 0001),it will work between 0 a.m. and 4 a.m. （B）Event List： Event List is used to display the real-time event records, including the total number of events and each specific ID No.

  • Page 58: Updating Inverter Software

    SOFAR 255KTL-HV-TRO User Manual the current system time. (C) Software Update User can update software by USB flash drive , SOFARSOLAR will provide the new update software called firmware for userif it is necessary,The user needs to copy the upgrade file to the USB flash drive.
  • Page 59 SOFAR 255KTL-HV-TRO User Manual process,the original password is 0715. Step 7 System update main DSP, slave DSP and ARM in turns.If main DSP update success,the LCD will display"Update DSP1 Success", otherwise display "Update DSP1 Fail";If slave DSP update success,the LCD will display"Update DSP2 Success",otherwise display "UpdateDSP2 Fail".

  • Page 60: Trouble Shooting And Maintenance

    SOFAR 255KTL-HV-TRO User Manual 8. Trouble shooting and maintenance 8.1. Troubleshooting This section describes the potential errors for this product. Please read carefully for the following tips when doing the troubleshooting: 1) Check the warning message or faulty codes on the inverter information panel 2) If not any error code display on the panel, please check the following lists: —...
  • Page 61 SOFAR 255KTL-HV-TRO User Manual protection points after obtaining approval from the local electrical grid operator. ID005 GFCI Charge Leakage Fault Check for inverter and wiring. ID006 OVRT fault OVRT function is faulty ID007 LVRT fault LVRT function is faulty ID008...
  • Page 62 SOFAR 255KTL-HV-TRO User Manual SpiCommFault SPI communication ID033 (DC) error (DC) SpiCommFault SPI communication ID034 (AC) error (AC) ID035 SChip_Fault Chip error (DC) ID036 MChip_Fault Chip error (AC) ID041 RelayFail Relay detection failure Check the insulation resistance between Low insulation...
  • Page 63 SOFAR 255KTL-HV-TRO User Manual lance voltage RMS inverter, wait for 5 minutes, then switch ON inverter. Check whether the problem is The transient value of VbusInstantUn solved. ID066 bus voltage is balance If no, please contact technical support. unbalanced Busbar undervoltage...
  • Page 64 SOFAR 255KTL-HV-TRO User Manual in a cool/well ventilated place. Ensure the inverter is installed vertically and the ambient temperature is below the inverter temperature limit. AC frequency is too ID114 FreqDerating high AC frequency is too ID115 FreqLoading Please make sure the grid frequency and voltage is within the acceptable range.
  • Page 65 SOFAR 255KTL-HV-TRO User Manual the safety version SciCommLose( SCI communication ID153 error (DC) SciCommLose( SCI communication ID154 error (AC) SciCommLose( SCI communication ID155 Fuse) error (Fuse) Inconsistent software Contact for technical support and software ID156 SoftVerError versions upgrades. ForceShutdow The inverter is performed a forced...

  • Page 66: Pid

    SOFAR 255KTL-HV-TRO User Manual 8.2. Maintenance Inverters generally do not need any daily or routine maintenance. But ensure heat sink should not be blocked by dust, dirt or any other items.Before the cleaning, make sure that the DC SWITCH is turned OFF and the circuit breaker between inverter and electrical grid is turned OFF.

  • Page 67: Svg

    SOFAR 255KTL-HV-TRO User Manual If the voltage scheme of the PID protection/recovery function does not meet the requirements of the corresponding PV module, the PID function cannot work properly or may even damage the PV module. Before enabling the reverse PID function, ensure that the inverter has been applied to the IT system.

  • Page 68: Technical Data

    SOFAR 255KTL-HV-TRO User Manual 9. Technical Data 9.1. Input parameters (DC) Parameter SOFAR 255KTL-HV-TRO Max. input voltage 1500V Rated input voltage 1160V Start-up voltage 550V MPPT operating 500V~1500V voltage range Full power MPPT 800V~1300V voltage range Number of MPP trackers Number for DC inputs Max.inputcurrent per...

  • Page 69: Output Parameter (Ac)

    SOFAR 255KTL-HV-TRO User Manual 9.2. Output Parameter (AC) Parameter SOFAR 255KTL-HV-TRO Rated outputpower 220kW@50° C 255kVA@35° C / Maximum apparent 235kVA@45° C / power 220kVA@50° C Rated output current 184A Max. Output current 184A Nominal grid voltage 3W+PE, 800Vac Grid voltage range...

  • Page 70: Performance Parameter

    SOFAR 255KTL-HV-TRO User Manual 9.3. Performance Parameter Parameter SOFAR 255KTL-HV-TRO Max efficiency 99.02% European Weighted 98.7% efficiency MPPT efficiency >99.9% EN 61000-6-2, EN 61000-6-4 IEC62109-1/2, IEC62116, IEC61727, IEC-61683, Safety standard IEC60068(1,2,14,30) AS/NZS 4777, VDE V 0124-100, V 0126-1-1, Grid standard...

  • Page 71: General Data

    SOFAR 255KTL-HV-TRO User Manual 9.4. General Data Parameter SOFAR 255KTL-HV-TRO Topology Transformless Ambient temperature -30℃~+60℃ range Relative humidity 0%～100% DC Switch Cooling Smart forced air cooling Max.altitude 5000m(> 4000m derating) Mounting Wall mount Communication WiFi /GPRS /RS485/PLC/Bluetooth（optional） Display LCD& Bluetooth +APP Self-consumption at <2W...

  • Page 72: Quality Assurance

    SOFAR 255KTL-HV-TRO User Manual 10. Quality Assurance Standard warranty period The standard warranty period of inverter is 60 months (5 years).There are two calculation methods for the warranty period: Purchase invoice provided by the customer: the first flight provides a standard warranty period of 60 months (5 years) from the invoice date;...
  • Page 73 SOFAR 255KTL-HV-TRO User Manual Invalid warranty clause Equipment failure caused by the following reasons is not covered by the warranty: 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;...
  • Page 74 Product Name: Solar Grid-tied Inverter ADD: 11/F., Gaoxinqi Technology Building, No.67 Area, Xingdong Community, Xin’an Sub-district, Bao’an District, Shenzhen City,China Email: service@sofarsolar.com Tel: 0510-6690 2300 Web: www.sofarsolar.com...

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