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

Solar grid-tied inverter
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User manual
Solar Grid-tied Inverter
Product Model: SOFAR 250-255KTL-HV
-PRO
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 250KTL-HV-PRO

  • Page 1 User manual Solar Grid-tied Inverter Product Model: SOFAR 250-255KTL-HV -PRO 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 250/255KTL-HV-PRO User Manual Contents Preface ........................III 1. Basic Safety Information ................... - 1 - 1.1. Requirement for Installation and Maintenance ......... - 1 - 1.2. Symbols and signs ................- 4 - 2. Product Characteristics ..................- 6 - 2.1.
  • Page 3 SOFAR 250/255KTL-HV-PRO User Manual 7. Operation interface ...................- 51 - 7.1. Operation and Display Panel ............- 51 - 7.2. Standard Interface ................- 52 - 7.3. Main Interface ..................- 54 - 7.4. Updating Inverter Software ............. - 57 - 8. Trouble shooting and maintenance ..............- 60 - 8.1.

  • Page 4: Preface

    SOFAR 250/255KTL-HV-PRO 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 250/255KTL-HV-PRO User Manual Outline  This manual is an integral part of SOFAR 250/255KTL-HV-PRO. 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:...

  • 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-PRO. 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-PRO 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-PRO 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 250/255KTL-HV-PRO 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 250/255KTL-HV-PRO User Manual Signs on the Product and on the Type Label SOFAR 250/255KTL-HV-PRO 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 250/255KTL-HV-PRO 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 250/255KTL-HV-PRO User Manual 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 250/255KTL-HV-PRO  L×W×H=1100.5*713.5*368mm - 7 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 13 SOFAR 250/255KTL-HV-PRO User Manual Figure 2-2 Product front view and left view dimensions - 8 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 14: Function Description

    SOFAR 250/255KTL-HV-PRO 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 250/255KTL-HV-PRO User Manual 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

    User Manual 2.3. Electrical block diagram SOFAR 250/255KTL-HV-PRO 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: Efficiency And Derating Curve

    SOFAR 250/255KTL-HV-PRO User Manual 2.4. Efficiency and derating curve - 12 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 18: Inverter Storage

    SOFAR 250/255KTL-HV-PRO 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 19: Installation

    SOFAR 250/255KTL-HV-PRO 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 20 SOFAR 250/255KTL-HV-PRO 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 1 pcs 250/255KTL-HV-PRO 1 pcs Rear Panel...

  • Page 21: Tools

    SOFAR 250/255KTL-HV-PRO User Manual 2 pcs M6*30 Hexagon screws 1 pcs Manual 1 pcs Warranty Card 1 pcs Outgoing inspection report 1 pcs Quality Certificate 1 pcs COM 16pin connector M12 Hand ring DC fuse 4.3. Tools Prepare tools required for installation and electrical connection as following table:...
  • Page 22 SOFAR 250/255KTL-HV-PRO User Manual 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 from the product...

  • Page 23: Determining The Installation Position

    SOFAR 250/255KTL-HV-PRO User Manual 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 Level properly installed...
  • Page 24 SOFAR 250/255KTL-HV-PRO User Manual Figure 4-1Installation Position Selection Figure 4-2Clearance for single inverter - 19 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 25 SOFAR 250/255KTL-HV-PRO 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. - 20 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 26: Moving Of Inverter

    SOFAR 250/255KTL-HV-PRO 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 27 SOFAR 250/255KTL-HV-PRO 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 28: Installation

    SOFAR 250/255KTL-HV-PRO 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 29 SOFAR 250/255KTL-HV-PRO 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 30 SOFAR 250/255KTL-HV-PRO 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 31 SOFAR 250/255KTL-HV-PRO 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 32 SOFAR 250/255KTL-HV-PRO 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 - 27 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 33: Electrical Connection

    SOFAR 250/255KTL-HV-PRO 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 34: Terminal Connector

    SOFAR 250/255KTL-HV-PRO 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 35: Grounding Connection (Pe)

    5.3. Grounding Connection (PE) Connect the inverter to the grounding electrode usingground cable SOFAR 250/255KTL-HV-PRO 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 36: Connect Grid Side Of Inverter(Ac-Output)

    SOFAR 250/255KTL-HV-PRO 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 37: Wiring Terminal And Precautions

    SOFAR 250/255KTL-HV-PRO User Manual 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. The AC cable need to meet the requirement of local grid operator.
  • Page 38 SOFAR 250/255KTL-HV-PRO User Manual 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.  When use copper clad aluminum cable, please use copper terminal connector.
  • Page 39 SOFAR 250/255KTL-HV-PRO User Manual Figure 5-7 AC Terminal size 5.4.4 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) Recommended：Outdoor Copper Wire: 95~185;...
  • Page 40 SOFAR 250/255KTL-HV-PRO 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. - 35 -...
  • Page 41 SOFAR 250/255KTL-HV-PRO 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 ...

  • Page 42: Connect Pv Side Of Inverter（Dc-Input

    SOFAR 250/255KTL-HV-PRO User Manual Cable outer Area(mm²) diameter(mm) 4.0~6.0 15~18 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 43 SOFAR 250/255KTL-HV-PRO User Manual The inverter has three DC switches (DC SWITCH 1, DC SWITCH 2 and DC SWITCH 3) DC SWITCH 1 Controls the PV1, PV2, PV3, and PV4 channels of the DC input terminal. DC SWITCH 2 Controls PV5, PV7, PV9, AND PV11 of DC input terminals.
  • Page 44 SOFAR 250/255KTL-HV-PRO User Manual PV1, PV2, PV3_1, PV5, PV1, PV2, PV3_1, PV5, PV6, PV7, PV8, PV9_1, PV6, PV7, PV8, PV9_1, PV11, PV12, PV10_1, PV11, PV12, 20 strings all connected Note: It is recommended that the voltage of MPPT is 1080Vdc and the open circuit voltage is 1350V.
  • Page 45 SOFAR 250/255KTL-HV-PRO User Manual MPPT3 string current display description: String current 7_ 1: Display the value as string PV7_ 1 Current size; String current 7_ 2: This current value is a string PV7_ 2 and PV8_ 2 Total current; String current 8_ 1: Display the value as string PV8_ 1 Current size;...
  • Page 46 SOFAR 250/255KTL-HV-PRO User Manual 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. Ensure the maximum short circuit current of PV strings should less than the ...
  • Page 47 SOFAR 250/255KTL-HV-PRO User Manual Figure 5-8 DC cable connection（1） Step2: Crimp the PV metal contact pin to the striped cable using a proper crimping pliers. Step3: Insert wire into the connector cap nut and assemble into the back of male or female plug, When you heard a “click”, the pin tact assembly is seated correctly.

  • Page 48: Communication Connection

    SOFAR 250/255KTL-HV-PRO User Manual 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 Removal Tool as below diagram, move the connector gently.
  • Page 49 By the USB acquisition stick (WIFI/GPRS/Ethernet), 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-PRO at its relevant website or APP according to monitoring deviceSN. - 44 -...
  • Page 50 SOFAR 250/255KTL-HV-PRO User Manual Figure 5-11 Connect one USB acquisition stick (WIFI version) to wireless router 5.6.2 COM—Multi function communication port Table 5-3 Recommend com cable size Outer Area Name Type diameter(mm) (mm²) RS485 Outdoor shielded twisted 3core：4~8 0.25~1 Communication Wire pair meets local standards Port Description：...
  • Page 51 SOFAR 250/255KTL-HV-PRO User Manual 14-16 Blank PIN Procedure： ① ③ ② ④ ⑤ Communications Port Description Logic interface (a) Logic interface for AS/NZS 4777.2:2020, also known as inverter demand response modes (DRMs). The inverter will detect and initiate a response to all supported demand response commands within 2 s.
  • Page 52 SOFAR 250/255KTL-HV-PRO User Manual 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 53 SOFAR 250/255KTL-HV-PRO User Manual Figure 5-14 Picture of the RS485/USB converter and PC terminal If only one SOFAR 250/255KTL-HV-PRO 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 54 SOFAR 250/255KTL-HV-PRO User Manual Figure 5-16Multi inverter monitoring system - 49 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 55: 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 250/255KTL-HV-PROinverter will start automatically. Screenshowing“normal”indicates correct operation. NOTE 1: Choose the correct country code. (refer to section 7.3 of this manual).

  • Page 56: Operation Interface

    SOFAR 250/255KTL-HV-PRO User Manual 7.Operation interface Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 250/255KTL-HV-PRO Inverter. 7.1. Operation and Display Panel Buttons and Indicator lights Button: “ ” Short press UP button = go up “...

  • Page 57: Standard Interface

    SOFAR 250/255KTL-HV-PRO 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 58 SOFAR 250/255KTL-HV-PRO 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. When control board successfully connected with communication board, the LCD display the current state of the inverter，display as shown in the figure below.

  • Page 59: Main Interface

    SOFAR 250/255KTL-HV-PRO User Manual 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; If not, Inverter will go to Fault State or Permanent State.
  • Page 60 SOFAR 250/255KTL-HV-PRO User Manual Main interface including below information: Normal ---------Long press DOWN button 1.Enter Setting 2.Event List 3.SystemInfo 4.Display Time 5.Software Update (A)Enter setting Interface as below： 1.Enter Setting --------Long press DOWN button 1.Set time 8.Set Input mode 2.Clear Energy 9.Set Language...
  • Page 61 Set the address (when you need to monitor multiple inverters simultaneously) ， Default 01. 8. Set Input mode SOFAR 250/255KTL-HV-PRO has 8-12 MPPTs, these MPPTs can work interdependently, or divided into parallel mode. User can change the setting according to the configuration.

  • Page 62: Updating Inverter Software

    SOFAR 250/255KTL-HV-PRO User Manual Event List interface through main interface to check details of real-time event records, 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”...
  • Page 63 SOFAR 250/255KTL-HV-PRO User Manual 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. If the RS485 line has been connected, please release the waterproof nut first and make sure the communication line is no longer the force.
  • Page 64 SOFAR 250/255KTL-HV-PRO User Manual screen extinguish,then recover the communication waterproof and then turn on the DC breaker and AC breaker again,the inverter will enters the running state. User can check the current software version in Systemlnfo>>3.SoftVersion. - 59 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 65: Trouble Shooting And Maintenance

    SOFAR 250/255KTL-HV-PRO 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 66 SOFAR 250/255KTL-HV-PRO User Manual local electrical grid operator. ID005 GFCI Charge Leakage Fault Check for inverter and wiring. OVRT function is ID006 OVRT fault faulty LVRT function is ID007 LVRT fault faulty ID008 IslandFault Island protection error GridOVPInsta Transient overvoltage...
  • Page 67 SOFAR 250/255KTL-HV-PRO User Manual t(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 the Low insulation photovoltaic array and ground (ground), if ID042 IsoFault impedance there is a short circuit, the fault should be repaired in time.
  • Page 68 SOFAR 250/255KTL-HV-PRO User Manual series voltage to fit the input voltage range of the inverter. After correction, the inverter will automatically return to its normal state. Inverter bus voltage SwBusRmsO ID072 RMS software overvoltage Inverter bus voltage SwBusInstant ID073 instantaneous value...
  • Page 69 SOFAR 250/255KTL-HV-PRO User Manual AcOCP overcurrent permanent inverter, wait for 5 minutes, then switch ON failure inverter. Check whether the problem is solved. unrecoverBus Permanent Bus ID130 If no, please contact technical support. overvoltage failure Permanent Bus unrecoverHw ID131 hardware overvoltage...
  • Page 70 SOFAR 250/255KTL-HV-PRO User Manual shutdown. RemoteDerati The inverter is performed for remote load ID165 Remote derating reduction. LogicInterface Logic interface The inverter is loaded by the execution ID166 Derating derating logic interface. AlarmAntiRefl The inverter is implemented to prevent ID167...
  • Page 71 SOFAR 250/255KTL-HV-PRO User Manual For the long-term proper operation of inverters, ensure there is enough space around the heat sink for ventilation, check the heat sink for blockage (dust, snow, etc.) and clean them if they exist. Please clean the heat sink with an air blower, a dry &...
  • Page 72 SOFAR 250/255KTL-HV-PRO User Manual 8.4. SVG After the SVG is enabled, the inverter can continue to be connected to the grid at night, and can respond to the reactive power scheduling instructions, saving the investment cost of the reactive static compensator.

  • Page 73: Technical Data

    SOFAR 250/255KTL-HV-PRO User Manual 9.Technical Data 9.1. Input parameters (DC) Parameter SOFAR 250/255KTL-HV-PRO Max. input voltage 1500V Rated input voltage 1160V Start-up voltage 550V MPPT operating 500V~1500V voltage range Full power MPPT 950V~1300V voltage range Number of MPP trackers Number for DC inputs Max.inputcurrent per...

  • Page 74: Output Parameter

    SOFAR 250/255KTL-HV-PRO User Manual 9.2. Output Parameter (AC) Parameter SOFAR 250KTL-HV-PRO SOFAR 255KTL-HV-PRO Rated 250kW 255kW outputpower 250kVA@35°C / 255kVA@35°C / Maximum 230kVA@45°C / 230kVA@45°C / apparent power 220kVA@50°C 220kVA@50°C Max. Output 180.5A 184A current Nominal grid 3W+PE, 800Vac voltage...

  • Page 75: Performance Parameter

    SOFAR 250/255KTL-HV-PRO User Manual 9.3. Performance Parameter Parameter SOFAR 250KTL-HV-PRO SOFAR 255KTL-HV-PRO Max efficiency 99.02% European Weighted 98.7% efficiency MPPT efficiency >99.9% Leakage current/Anti-islanding /DC reverse Protection polarity/ZVRT/AC and DC secondary lightning protection Ground fault monitoring PV-array string fault monitoring...
  • Page 76 SOFAR 250/255KTL-HV-PRO User Manual Relative humidity 0%～100% DC Switch Cooling Smart forced air cooling Max.altitude 5000m(> 4000m derating) Mounting Wall mount Communication PLC/RS485/Bluetooth; optional：WiFi Display LCD& Bluetooth +APP Self-consumption <2W at night Degree of IP66 protection Dimension 1100.5×713.5×368mm Weight 99.3kg - 71 - Copyright ©...

  • Page 77: Quality Assurance

    SOFAR 250/255KTL-HV-PRO 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 78 SOFAR 250/255KTL-HV-PRO User Manual 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 79 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...
  • Page 80 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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