Sofar 250KTL-HV User Manual
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Sofar 250KTL-HV User Manual

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SOFAR 250/255KTL-HV
User Manual
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Shenzhen SOFARSOLAR Co., Ltd.
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Summary of Contents for Sofar 250KTL-HV

  • Page 1 SOFAR 250/255KTL-HV User Manual Shenzhen SOFARSOLAR Co., Ltd. All copy reserved ©...

  • Page 2: Table Of Contents

    Communication Connection ............- 50 - 6. Commissioning of inverter ................- 54 - 6.1............- 54 - Cable Connection Inspection 6.2. Start Inverter ..................- 55 - 7. SOFAR Monitor APP(Optional) ..............- 56 - Shenzhen SOFARSOLAR Co., Ltd. All copy reserved ©...
  • Page 3 SOFAR 250/255KTL-HV User Manual 7.1..................- 56 - Download 7.2.............- 57 - Account Registration and Login 7.3..................- 59 - Local Control 7.4................- 64 - About the Software 8. Operation interface ..................- 66 - 8.1. Operation and Display Panel ............- 66 - 8.2.

  • Page 4: Preface

    67,XingDong Community, XinAn Street, BaoAn District, Shenzhen, China. Postcode: 518000 Company Website: www.sofarsolar.com Email: service@sofarsolar.com  Outline This manual is an integral part of SOFAR 250/255KTL-HV. It describes the assembly, installation, commissioning ,maintenance and failure of the - 1 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 5 Please read it carefully before operating.  Scope of Validity This manual contains important instructions for: SOFAR 250KTL-HV、SOAFR 255KTL-HV  Target Group This manual is for qualified electricians. The tasks described in this manual only can be performed by qualified electricians.

  • Page 6: Basic Safety Information

    Shenzhen SOFARSOLAR CO., Ltd. Note Safety Instruction Introduce the safety instruction during installation and operation of SOFAR 250/255KTL-HV. Symbols Instruction This section gives an explanation of all the symbols shown on the inverter and on the type label.
  • Page 7 Label and Symbols SOFAR 250/255KTL-HV 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 250/255KTL-HV User Manual Transportation Requirement Inverter is in the good electrical and physical condition when it ship out from factory. During transport, inverter must be placed in its original package or other proper package. Transportation company should responsible for any damage during transport period.
  • Page 9 SOFAR 250/255KTL-HV User Manual Enclosure or internal components may get hot during operation. Do not touch hot surface or wear insulated gloves. Keep it away from kids ! Attention Maintenance and repair Before any repair work, turn OFF the AC circuit breaker between the inverter and electrical grid first, then turn OFF the DC switch.

  • Page 10: Symbols And Signs

    SOFARSOLAR will not take the responsibility including warranty. Warning Signs on the Product and on the Type Label SOFAR 250/255KTL-HV has some safety symbols on the inverter. Please read and fully understand the content of the symbols before installation. Symbols Name...
  • Page 11 SOFAR 250/255KTL-HV User Manual voltage sources. All work on the product must be carried out by qualified persons only. The product can get hot during operation. Caution of hot Avoid contact during operation. Prior to surface performing any work on the product,...

  • Page 12: Product Characteristics

    2.Product Characteristics Outlines of this Chapter The following are the areas of use and overall dimensions of the SOFAR 2 50/255KTL-HV inverter; the principle of operation of the SOFAR 250/255K TL-HV inverter and its internal functional modules; and the circuit topology of the inverter.
  • Page 13 SOFAR 250/255KTL-HV User Manual 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 250/255KTL-HV  L×W×H=1100.5*713.5*368mm Figure 2-2 Product front view and left view dimensions - 10 - Copyright ©...
  • Page 14 SOFAR 250/255KTL-HV 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: Function Description

    SOFAR 250/255KTL-HV User Manual 2.2. Function Description DC power generated by PV arrays is filtered through Input Board then enter Power Board. Input Board also offer functions such as insulation impedance detection and input DC voltage/ current detection. DC power is converted to AC power by Power Board.
  • Page 16 "Night SVG mode", and the desired reactive power output can be controlled through the APP, while the inverter stays in the "Night SVG mode" mode. Currently, the SOFAR 255KTL-HV has a reactive power range of -76 kVar to +76 kVar.
  • Page 17 SOFAR 250/255KTL-HV User Manual When the inverter is running in "Night Q" mode, two working modes can be selected via "SVG Reactive Power Enable Bit": Fixed Reactive Power Mode (not enabled by default), i.e., set the percentage of reactive power output, and the inverter continuously outputs a fixed amount of reactive power according to the setting.

  • Page 18: Electrical Block Diagram

    2.3. Electrical block diagram SOFAR 250/255KTL-HV has 16-24 DC input strings. 8-12 MPPT trackers - 15 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 19 SOFAR 250/255KTL-HV User Manual 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). Figure 2-5 Schematic diagram - 16 -...

  • Page 20: Inverter Storage

    SOFAR 250/255KTL-HV 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 ...

  • Page 21: Installation

    SOFAR 250/255KTL-HV 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. Dangers The enclosure and heat sink will get hot during operation, please do not mount the product at a easy to reach location.
  • Page 22 SOFAR 250/255KTL-HV User Manual product within 24 hours after unpacking the package. Checking Deliverable After unpacking, please check according to following table, to see whether all the parts were included in the packing, please contact your distributor immediately if anything missing or damage.
  • Page 23 SOFAR 250/255KTL-HV User Manual M12*50combination bolt 4 pcs M6*30 Hexagon screws 2 pcs Manual 1 pcs Warranty Card 1 pcs Outgoing inspection report 1 pcs Quality Certificate 1 pcs COM 16pin connector 1 pcs M12 lifting bolt 2 pcs - 20 -...

  • Page 24: Tools

    SOFAR 250/255KTL-HV User Manual 4.3. Tools Installation tools include, but are not limited to, those recommended below. Other auxiliary tools may be used in the field if necessary.Prepare tools required for installation and electrical connection as following table: Table 4-2 Installation tools...
  • Page 25 SOFAR 250/255KTL-HV User Manual Used to hammer Rubber Mallet expansion bolts into holes M6 use to uninstall and install the front top cover and down cover Torque Connect AC connector wrench Use to crimp cable on grid Crimping Tool side, load side and CT...

  • Page 26: Determining The Installation Position

    SOFAR 250/255KTL-HV User Manual Safety Installer wear when goggles installing product Installer wear when Mask installing product 4.4. Determining the Installation Position It is necessary to select a location for mounting the inverter that has sufficient load-bearing capacity to ensure that the inverter can work properly and efficiently.
  • Page 27 SOFAR 250/255KTL-HV User Manual  It is very important to ensure that the inverter is well ventilated for heat dissipation, please install the inverter in a ventilated environment.  The inverter should be installed in a location greater than 30m from third party wireless communication facilities and living environments.
  • Page 28 SOFAR 250/255KTL-HV User Manual Figure 4-1 Mounting Position Selection For multiple inverter installation scenarios, zigzag installation is recommen ded when there is enough space. Zigzag, back-to-back and wall mounting are not recommended. Zigzag, back-to-back and near-wall mounting requir e users to provide their own windshield to isolate the inverters from the inc oming and outgoing air.

  • Page 29: Moving Of Inverter

    SOFAR 250/255KTL-HV 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.  4.5. Moving of inverter 4.5.1 Manual handling...
  • Page 30 SOFAR 250/255KTL-HV User Manual Figure 4-4 auxiliary handle position 4.5.2 Lifting Equipment 1.Tighten the screws of two M12 rings into the inverter sides according to the instruction diagram below (Note: M12 rings need self-preparation). Figure 4-5 Installation of Rings 2.Fastened and tied the rope through two rings. Lifting inverter 50 mm above ground by using lifting equipment, check the tightening device of the hoisting ring and rope.

  • Page 31: Installation

    SOFAR 250/255KTL-HV User Manual Figure 4-6 Lifting Keep balance when lifting the inverter, avoid to crash on wall or other objective. Stop working in bad weather condition such as raining, heavy fog, winding. Attention 4.6. Installation 4.6.1 Installed on wall：...
  • Page 32 SOFAR 250/255KTL-HV User Manual Step 2: Insert the expansion bolt vertically into the hole. Figure 4-8 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 33 SOFAR 250/255KTL-HV User Manual Figure 4-10 Fix inverter 4.6.2 Bracket Installation： Step1: Use wall mount bracket, ensure the pole position are in same level - 30 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 34 SOFAR 250/255KTL-HV User Manual by using level rule and take a mark with maker. Figure 4-11 Ensure hole position Step 2: Drilling hole by using Hammer Drill, recommend to do a stain proofing. Figure 4-12 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）.
  • Page 35 SOFAR 250/255KTL-HV User Manual 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）. Note: If height between ground and bracket is less than 1.5m, use auxiliary handle for installation. Otherwise, use lifting equipment.

  • Page 36: Electrical Connection

    SOFAR 250/255KTL-HV 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 37: Electrical Connection

    SOFAR 250/255KTL-HV User Manual 5.4 Connect AC output（AC-Output) Connect AC output for feeding generated electrical into the utility grid. Must meet the requirement of local utility grid company. 5.5 Connect the power cord of the tracking system (optional) 5.6 DC input connection Connect PV array with inverter by DC cable.

  • Page 38: Grounding Connection (Pe)

    Grounding Connection (PE) Connect the inverter to the grounding electrode usingground cable SOFAR 250/255KTL-HV 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, all non-current-carrying metal parts (such as mounting frame, combiner box enclosure, etc.) should be connected to earthed.
  • Page 39 SOFAR 250/255KTL-HV User Manual Figure 5-2 Grounding connection instruction（1） Note：The length of L2 should 2~3mm higher than L1. Step 2: Thread the stripped insulation core into the conductor crimp area of the OT terminal and compress with crimping pliers (Figure 5-3).

  • Page 40: Connect Grid Side Of Inverter(Ac-Output)

    SOFAR 250/255KTL-HV User Manual A.M8hexagon screw B. grounding cable Figure 5-4 Inverter external grounding instruction diagram Note: For improving anti-corrosion performance, after ground cable installed, apply silicone or paint is preferred to protect. 5.4. Connect grid side of inverter(AC-Output) Inverter has a standard and integrated residual current monitoring unit (RCMU), when inverter detected leakage current excess 300mA, it will cut off with utility grid for protection.
  • Page 41 SOFAR 250/255KTL-HV User Manual  Please do not unused screw in the wiring box. Use M6 driver to unscrew the two screws on the wiring box,open wiring box cover. Figure 5-5 Open wiring box 5.4.2 Wiring Terminal and Precautions Note：...
  • Page 42 SOFAR 250/255KTL-HV User Manual Figure 5-6 OT/DT Requirement for terminal connection Attention: It is strictly prohibited to connect the aluminum terminal block directly  to the terminal block, otherwise it will cause galvanic corrosion and affect the reliability of cable connection.
  • Page 43 SOFAR 250/255KTL-HV User Manual Figure 5-7 AC Terminal size 5.4.3 Wring Procedure The section will use a five core wire as a sample, four core wire has same connection process. Table 5-1 Recommend AC cable size Name Type Area(mm²) Copper wire: L1,L2,L3: 90~185 Aluminum wire: L1,L2,L3: Outdoor 3-core copper、4-core...
  • Page 44 SOFAR 250/255KTL-HV User Manual Note: The PE ground values in this table are valid only if the conductor material of the protective earth and the AC output line are the same. Otherwise, the protective earth conductance should be made equivalent to that specified in this table by selecting the appropriate cross-sectional area of the cable conductor.
  • Page 45 SOFAR 250/255KTL-HV User Manual Step 6: Secure the cable to the corresponding terminal. Note：Phase lines use M12 terminal connector, PE line use M8 terminal connector. Step 7: Close the junction box cover and tighten the junction box screws. prerequisites: 1. When using armored wire, need to pay attention to the AC cable bending...
  • Page 46 SOFAR 250/255KTL-HV User Manual  The length of the protective earth wire should be reserved to ensure that the protective earth wire is the last to bear the stress when the AC output wire is subjected to tensile force due to force majeure.

  • Page 47: Connect The Power Cord Of The Tracking System (Optional)

    SOFAR 250/255KTL-HV User Manual order to improve the anticorrosion performance of the grounding terminal, it is recommended that after the installation of the grounding cables is completed, the outside of the grounding terminal should be coated with silica gel or brushed with paint for protection;...
  • Page 48 SOFAR 250/255KTL-HV User Manual o supply power to the tracking system, and the rated voltage of the power supply is the rated output voltage of the inverter. Attention： Between the inverter and the tracking control box, it is necessary to ...

  • Page 49: Connect Pv Side Of Inverter（Dc-Input

    SOFAR 250/255KTL-HV User Manual 5.6. Connect PV side of inverter（DC-Input） Note： Connecting PV strings into inverter must following the below procedure.  Otherwise, any faulty cause by inappropriate operation will be including in the warranty case. Ensures that the PV string voltage per circuit does not exceed 1500V ...
  • Page 50 SOFAR 250/255KTL-HV User Manual Prohibit the connector from being in a state where the docking snap-in  is not in place, if the connector is damaged due to the docking snap-in not being in place it is not covered by the warranty.
  • Page 51 SOFAR 250/255KTL-HV User Manual Crimping Tool Step3: Pass the crimped positive and negative cable wires through the locking nut and insert them into the corresponding plastic housings until a clicking sound is heard, indicating that the metal core has clicked into place;...
  • Page 52 SOFAR 250/255KTL-HV User Manual Figure 5-9DC cable connection Note：Please use multimeter to make sure the PV array positive pole and negative pole! When wiring in the field, the DC input line should be naturally sagging not less than 50mm, the axial tension on the PV connector should not exceed 80N, and it is prohibited to generate radial stress or torque on the PV connector.

  • Page 53: Communication Connection

    By the USB acquisition stick (WIFI), transfer the inverter power output information, alarm information, operation state to the PC terminal or local data acquisition device, then uploaded to the server. Register remote monitoring of SOFAR 250/255KTL-HV at its relevant website or APP according to monitoring device SN. - 50 -...
  • Page 54 SOFAR 250/255KTL-HV User Manual Figure 5-12 Connect one USB acquisition stick (WIFI version) to wireless router 5.7.2 COM—Multi function communication port Access Steps: Port Description： Define Function Note RS485A RS485 signal+ Wire connection RS485A RS485 signal+ monitoring or RS485B RS485 signal-...
  • Page 55 Figure 5-13 Picture of the RS485/USB converter and PC terminal If only one SOFAR 250/255KTL-HV is used, use a communication cable, refer to for COM pin definition, and choose either of the two RS485 ports.
  • Page 56 SOFAR 250/255KTL-HV User Manual Figure 5-14 A single SOFAR 250/255KTL-HV connecting communications The length of the RS485 communication cable should be less than  1000 m. The length of the WIFI communication cable should be less than  100 m.

  • Page 57: Commissioning Of Inverter

    SOFAR 250/255KTL-HV User Manual 6.Commissioning of inverter Outlines this Chapter Introduce SOFAR 250/255KTL-HV safety inspection and start processing. 6.1. Cable Connection Inspection For first time operation, check the AC voltage and DC voltage are within the acceptable range. Attention When the inverter is hooked up and not in operation for half a year or more, the inverter needs to be inspected and tested by a professional before it is put into operation.

  • Page 58: Start Inverter

    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 250/255KTL-HVinverter will start automatically. Screen showing “normal” indicates correct operation.

  • Page 59: Sofar Monitor App(Optional)

    7.SOFAR Monitor APP(Optional) Overview SOFAR Monitor is a new efficient, safe, fast and intelligent photovoltaic monitoring software, complete the near-end debugging and remote monitoring Settings. From the creation of power Plants to management, operation and maintenance, realize integrated services, easy to master your power Plant information.

  • Page 60: Account Registration And Login

    User Manual 7.2. Account Registration and Login 7.2.1 Registration If you do not have an account of SOFAR Monitor, please enter the registration page on the login interface. Registration page Please click the "Register account" button to enter the registration page.
  • Page 61 SOFAR 250/255KTL-HV User Manual Complete registration Note: Users please select the user account type registration, if you have registered again, the password for the old password. Step 2: follow the prompts to complete the registration process At present, we support cell phone number or email account for account registration;...

  • Page 62: Local Control

    SOFAR 250/255KTL-HV User Manual 7.2.2 Login If you already have an account of SOFAR Monitor, please log in directly on the login page. 7.3. Local Control Note: Before using this function, please turn on the Bluetooth of your cell phone in advance, and you need to apply for permission to open before you can carry out safety regulations and firmware operations.
  • Page 63 SOFAR 250/255KTL-HV User Manual Connection mode The Connect Bluetooth screen is displayed. You can connect to the screen in two modes: “scan” and “search”. - 60 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 64 SOFAR 250/255KTL-HV User Manual ·Scanning： Click [Scan] will prompt you to open the camera on the phone, scan the SN bar code on the inverter and start searching for the Bluetooth of the machine. When you find the Bluetooth, it will automatically connect and enter the home page.
  • Page 65 SOFAR 250/255KTL-HV User Manual ·Searching: Click [Search] will jump to the list of Bluetooth devices and start searching for nearby available Bluetooth devices. Select the device you want to connect according to the inverter serial number. - 62 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 66 SOFAR 250/255KTL-HV User Manual After successfully connecting the device, enter the Bluetooth home page. - 63 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 67: About The Software

    SOFAR 250/255KTL-HV User Manual 7.4. About the Software For the introduction of APP functions and specific operation, please click "My" page, and click [Personal Settings] to enter the sidebar, and click [Personal Settings], and you can view the operation manual in the page.
  • Page 68 SOFAR 250/255KTL-HV User Manual - 65 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 69: Operation Interface

    SOFAR 250/255KTL-HV User Manual 8.Operation interface Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 250/255KTL-HV Inverter. 8.1. Operation and Display Panel Buttons and Indicator lights Button: “^” Short press UP button = go up “^”...

  • Page 70: Standard Interface

    SOFAR 250/255KTL-HV User Manual 8.2. Standard Interface LCD interface indicated inverter status, alarm information, communication connection, PV input current and voltage, grid voltage,current and frequency, today generation, total generation. The main screen information can be viewed by tapping the "v" button.
  • Page 71 SOFAR 250/255KTL-HV User Manual Inverter working status, grid voltage and frequency Inverter working status, Wi-Fi/ RS485/4G/Ethernet status Inverter faulty alarm When power turn on, LCD interface displays Initializing, refer below picture. - 68 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 72 SOFAR 250/255KTL-HV 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 73: Main Interface

    SOFAR 250/255KTL-HV User Manual maintainer debug this kind of error according to error code. When the control board and communication board connection fails, the LCD display interface as shown in the figure below. 8.3. Main Interface Long press the down button under standard interface to enter into main interface,...
  • Page 74 Set the address (when you need to monitor multiple inverters simultaneously)，Default 01. Set Input mode SOFAR 250/255KTL-HV has 8-12 MPPTs, these MPPTs can work interdependently, or divided into parallel mode. User can change the setting according to the configuration. Set Language - 71 - Copyright ©...
  • Page 75 SOFAR 250/255KTL-HV User Manual Set the inverter display language. 10. Set RefluxP The refluxpower value set by the anti-reflux function is the maximum power value allowed to be transmitted to the grid. 11. Logic interface Enable or disable logical interfaces. It is use for below standard Australia (AS4777), Europe General (50549), German(4105).

  • Page 76: Updating Inverter Software

    USB flash drive. 8.4. Updating Inverter Software SOFAR 250/255KTL-HV inverter offer software upgrade via USB flash drive to maximizeinverter performance and avoid inverter operation error caused by software bugs. Step 1 ： Turn off AC circuit breaker and DC switch, remove the communication board cover as below figure.
  • Page 77 SOFAR 250/255KTL-HV User Manual U disk Figure 8-1Remove communication broad cover Step 2：Insert USB into computer. Step 3：SOFARSOLAR service team will send the software code to user, After user receive the file, please decompressing file and cover the original file in USB flash drive.

  • Page 78: Trouble Shooting And Maintenance

    SOFAR 250/255KTL-HV User Manual 9.Trouble shooting and maintenance 9.1. Normal outage power down operation Step 1: Remote shutdown setting through the machine display, or sending shutdown command in Bluetooth APP or management system, for details, please refer to the user manual of the corresponding product or consult the after-sales personnel;...

  • Page 79: Confirmation Of Troubleshooting Site Information

    SOFAR 250/255KTL-HV User Manual DC switch operation. Step 5: Use a multimeter to measure the AC terminal line voltage as well as the voltage of each phase of the chassis to ensure that the AC side of the inverter is disconnected.
  • Page 80 SOFAR 250/255KTL-HV User Manual Table 9-1 Even list Code Name Description Solution The grid voltage is If the alarm occurs occasionally, the ID001 GridOVP too high possible cause is that the electric grid is abnormal occasionally. The grid voltage is...
  • Page 81 SOFAR 250/255KTL-HV User Manual Transient AC wiring of the inverter. GridOVPI ID010 overvoltage of grid nstant2 If the grid voltage/frequency is NOT voltage 2 within the acceptable range and AC wiring is correct, but the alarm VGrid Line Power grid line...
  • Page 82 SOFAR 250/255KTL-HV User Manual HwADErr DCI Sampling ID025 DCI(DC) Error (DC) HwADErrI ID026 dcBranch PID Exception ID028 Output Consistent Leakage current ID029 Fault_GF consistency error Consistent Grid voltage ID030 Fault_Vgri consistency error Consistent DCI consistency ID031 error SpiComm ID033 communication...
  • Page 83 SOFAR 250/255KTL-HV User Manual Check the insulation resistance between the photovoltaic array and Low insulation ID042 IsoFault ground (ground), if there is a short impedance circuit, the fault should be repaired in time. PEConnec Check ac output PE wire for...
  • Page 84 SOFAR 250/255KTL-HV User Manual protection Ambient TempFault ID058 temperature 2 _Env2 protection Module 1 TempFault ID059 temperature _Inv1 protection Module 2 TempFault ID060 temperature _Inv2 protection Module 3 TempFault ID061 temperature _Inv3 protection VbusRms Unbalanced bus ID065 Unbalance voltage RMS...
  • Page 85 SOFAR 250/255KTL-HV User Manual sOVP voltage RMS inverter, wait 5 minutes and turn on software the inverter. Check if the problem is overvoltage resolved. If not, contact technical support. Inverter bus voltage SwBusInst ID073 instantaneous antOVP value software overvoltage FlyingCap...
  • Page 86 SOFAR 250/255KTL-HV User Manual protection Software SwAcCBC wave-by-wave ID092 Fault current limit protection V branch software SwPvBran overcurrent ID093 chOCP (enabled by default) Inverter bus HwBusOV ID098 hardware overvoltage HwPVOC PV hardware ID102 overflows Ac output HwACOC ID103 hardware overflows...
  • Page 87 SOFAR 250/255KTL-HV User Manual FreqDerati AC frequency is ID114 too high FreqLoadi AC frequency is ID115 Please make sure the grid too low frequency and voltage is within the VoltDerati AC voltage is too acceptable range. ID116 high VoltLoadin AC voltage is too...
  • Page 88 SOFAR 250/255KTL-HV User Manual ID146 WifiFault Wifi fault Check the Wifi port of the inverter Bluetooth Check the bluetooth connection of ID147 Bluetooth fault Fault the inverter ID148 RTCFault RTC clock failure CommEE Communication ID149 PROMFau board EEPROM error Communication...
  • Page 89 SOFAR 250/255KTL-HV User Manual failure shutdown RemoteDe The inverter is performed for ID165 Remote derating rating remote load reduction. LogicInterf Logic interface The inverter is loaded by the ID166 aceDerati derating execution logic interface. AlarmAnti The inverter is implemented to...

  • Page 90: Maintenance

    SOFAR 250/255KTL-HV User Manual PLC_Com ID192 communication is _Fail lost 9.4. 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 91 SOFAR 250/255KTL-HV User Manual be affected by plants and grasses that affect the heat dissipation in front of the inverter, and it is necessary to inspect and get rid of grasses in time. 3. The inverter should not be surrounded by piles of objects that...

  • Page 92: Fan Maintenance And Replacement Instructions

    SOFAR 250/255KTL-HV User Manual of inverter operation are within the prescribed range, focusing on DC voltage, DC current, DC power, AC voltage, AC current, frequency, power generation, daily power generation, cumulative power generation and other parameters are normal; 3.Whether the equipment is normal without abnormal noise and odor;...
  • Page 93 SOFAR 250/255KTL-HV User Manual Step 3: Remove the screws securing the fan bracket and pull the fan mou nting bracket all the way out. Step 4: Clean the fan using a soft-bristled brush or vacuum cleaner to rem ove any debris or mud left on the fan bracket.
  • Page 94 SOFAR 250/255KTL-HV User Manual Step 7: put the small baffle back on and tighten the screws. 9.5.2.Fan replacement When the inverter reports a fan failure, a fan replacement is required for the inverter. Attention： Before replacing the fan, it is necessary to perform a de-energizing operation on the inverter.
  • Page 95 SOFAR 250/255KTL-HV User Manual Step 3: Cut the fan cable retaining ties and unplug the connection terminals. Note: You can't use brute force to pull out the terminal, you can use your fingernail (tweezers or a small screwdriver are recommended) to press down on the movable buckle, and then pull it out to the 2 ends.
  • Page 96 SOFAR 250/255KTL-HV User Manual Step 5: Cut off the faulty fan (the outermost FAN 7 is used as an example below, all other fans work in the same way) tie. FA N3 F AN 4 F AN 5 F AN 6 F AN 7 Step 6: Remove the defective fan and store the removed screws properly.

  • Page 97: Technical Data

    Step 10: Push the fan mounting bracket all the way in and tighten the screws. 10. Technical Data About this chapter Introduces the technical specifications for each model of the SOFAR 225/230KTL-HV solar grid-tie inverter. - 94 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 98: Input Parameters (Dc)

    SOFAR 250/255KTL-HV User Manual 10.1. Input parameters (DC) Parameter SOFAR 250/255KTL-HV 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 MPPT trackers Number for DC inputs Max.

  • Page 99: Output Parameter (Ac)

    SOFAR 250/255KTL-HV User Manual 10.2. Output Parameter (AC) Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV Rated output power 250kW 255kW 250kVA@35°C/ 255kVA@35°C/ Maximum apparent 230kVA@45°C/ 230kVA@45°C/ power 220kVA@50°C 220kVA@50°C Rated output current 180.5A 184A Max. Output current 180.5A 184A Nominal grid voltage...

  • Page 100: Performance Parameter

    SOFAR 250/255KTL-HV User Manual 10.3. Performance Parameter Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV Max efficiency 99.02% European Weighted 98.7% efficiency MPPT efficiency >99.9% EN/IEC 61000-6-2, EN/IEC 61000-6-4 IEC 62109-1/2, IEC62116, IEC61727, IEC Safety standard 61683,IEC60068-2-1/-2/-14/-30 EN50549, EN50530, VDE 0126-1-1, VDE-AR-N Grid standard...

  • Page 101: General Data

    SOFAR 250/255KTL-HV User Manual 10.4. General Data Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV 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 RS485/PLC Display LCD& Bluetooth +APP Self-consumption at <2W...

  • Page 102: Quality Assurance

    SOFAR 250/255KTL-HV User Manual 11. 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 103 SOFAR 250/255KTL-HV User Manual Equipment failure caused by the following reasons is not covered by the warranty: The "warranty card" has not been sent to the distributor or our company; Without the consent of our company to change equipment or replace parts;...
  • Page 104 SOFAR 250/255KTL-HV User Manual - 1 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

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