Sofar solar SOFAR 7.5KTLM User Manual
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Sofar solar SOFAR 7.5KTLM User Manual

Solar grid-tied inverter
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User manual
Solar Grid-tied Inverter
Product Model: SOFAR 7.5KTLM
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 solar SOFAR 7.5KTLM

  • Page 1 User manual Solar Grid-tied Inverter Product Model: SOFAR 7.5KTLM 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

    3.3. Product Overview..................... - 14 - 3.4. Tools........................- 15 - 3.5. Determining the Installation Position............... - 16 - 3.6. Moving the SOFAR 7.5KTLM................. - 18 - 3.7. Installing SOFAR 7.5KTLM................- 19 - 4. Electrical Connections....................- 21 - 4.1. Electrical connection..................- 22 - 4.2.
  • Page 3 User manual SOFAR 7.5KTLM Notice This manual contains important safety instructions that must be followed during installation and maintenance of the equipment. Save these instructions! This manual must be considered as an integral part of the equipment. The manual must always accompany the equipment,even when it is transferred to another user or field.

  • Page 4: Preface

    Scope This product manual describes the installation,electrical connections, commissioning,maintenance and troubleshooting of SOFAR 7.5KTLM inverters Keep this manual where it will be accessible at all times. Target Group This manual is intended for qualified electrical technical personnel who are responsible for inverter installation and commissioning in the PV power system and PV plant operator.
  • Page 5 User manual SOFAR 7.5KTLM Danger indicates a hazardous situation which, if not avoided, will result in death or serious injury. Danger Warning indicates a hazardous situation which, if not avoided, could result in death or serious injury. Warning Caution indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

  • Page 6: Basic Safety Information

    User manual SOFAR 7.5KTLM 1. Basic safety information If you have any question or problem when you read the following information, please contact Shenzhen SOFARSOLAR Co., Ltd. Note Outlines of this chapter Safety instruction It mainly introduce the safety instruction when install and operate the equipment.
  • Page 7 User manual SOFAR 7.5KTLM Qualified persons The customer must make sure the operator has the necessary skill and training to do his/her job.Staff in charge of using and maintaining the equipment must be skilled,aware and mature for the described tasks and must have the reliability to correctly interpret what is described in the manual.
  • Page 8 User manual SOFAR 7.5KTLM Transport of the equipment, especially by road, must be carried out with by suitable ways and means for protecting the components (in particular, the electronic components) from violent shocks, humidity, vibration, etc. Electric connection Please comply with all the current electrical regulations about accident prevention in dealing with the solar invert.

  • Page 9: Symbols And Signs

    User manual SOFAR 7.5KTLM 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. After turning OFF the AC circuit breaker and DC switch, wait...
  • Page 10 Caution hot surface. Comply with the Conformite Europeenne (CE) certification. Grounding point. Please read this manul before install SOFAR 7.5KTLM. This indicates the degree of protection of the equipment according to IEC standard 70-1 (EN 60529 June 1997). Positive pole and negative pole of the input voltage (DC).

  • Page 11: Product Characteristics

    User manual SOFAR 7.5KTLM 2. Product characteristics Outlines of this chapter Product dimensions It introduces the field of use, and the overall dimensions of SOFAR 7.5KTLM inverters. Function description It introduces how SOFAR 7.5KTLM inverters work and the function modules inside.
  • Page 12 User manual SOFAR 7.5KTLM operation must not exceed the limits specified in the technical specifications. Only the photovoltaic modules can be connected to the input of the inverter (do not connect batteries or other sources of power supply). The choice of optional parts of inverter should be made by a qualified technician who knows the installation conditions clearly.

  • Page 13: Function Description

    User manual SOFAR 7.5KTLM Figure 2-4 Bracket dimensions of SOFAR7.5KTLM  Labels on the equipment The labels must NOT be hidden with objects and extraneous parts (rags,boxes,equipment,etc.);they must be cleaned regularly and kept visible at all times. 2.2. Function description DC power generated by PV array is filtered through Input Board before entering into Power Board.
  • Page 14 User manual SOFAR 7.5KTLM can trigger the relay so as to protect the internal components. Function module A. Energy management unit This control can be used to switch the inverter on/off through an external (remote) control. B. Feeding reactive power into the grid The inverter is able to produce reactive power and can therefore feed it into the grid through the setting of the phase shift factor.

  • Page 15: Efficiency Curve

    User manual SOFAR 7.5KTLM Electrical block diagram Figure 2-5 Electrical block diagram 2.3. Efficiency curve - 10 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 16: Installation

    User manual SOFAR 7.5KTLM 3. Installation Outlines of this chapter This topic describes how to install the SOFAR 7.5KTLM . Installation notes 7.5KTLM Do NOT install the SOFAR on flammable material. 7.5KTLM Do NOT install the SOFAR in an area used to store Flammable or explosive material.
  • Page 17 If any damage is found, do not unpack the SOFAR 7.5KTLM and contact the dealer as soon as possible. You are advised to remove the packing materials within 24 hours before installing the SOFAR 7.5KTLM inverter.
  • Page 18 User manual SOFAR 7.5KTLM M5Hexagon screws 2pcs Expansion bolts 10pcs M6 flat washer 10pcs Self-tapping screw 8pcs Tubular pressure terminal 3pcs Manual 1pcs The warranty card 1pcs Outgoing inspection report 1pcs Registration Form 1pcs 485 terminal (2pin) 1pcs - 13 -...

  • Page 19: Product Overview

    1pcs switch lock） 3.3. Product Overview SOFAR 7.5KTLM inverter is 100% strictly inspected before package and delivery. It is forbidden to put the SOFAR 7.5KTLM inverter upside down during delivery. Please check the product package and fittings carefully before installation.

  • Page 20: Tools

    User manual SOFAR 7.5KTLM 3.4. Tools Prepare tools required for installation and electrical connections. Table 3-3 shows the tools required for installation and electrical connections. Tool Model Function Hammer drill Recommend drill Used to drill holes on the wall. dia. 6mm...

  • Page 21: Determining The Installation Position

    Safety goggles Operators wear Anti-dust respirator Operators wear 3.5. Determining the Installation Position Determine an appropriate position for installing the SOFAR 7.5KTLM inverter. Comply with the following requirements when determining the installation position: Figure 3-3 Installation Requirements - 16 -...
  • Page 22 User manual SOFAR 7.5KTLM Clearance for single SOFAR 7.5KTLM Inverter Figure 3-4 Installation of multiple SOFAR 7.5KTLM inverter Figure 3-5 - 17 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 23: Moving The Sofar 7.5Ktlm

    Figure 3-6 and Figure 3-7. Figure 3-6 Moving the inverter (1) Figure 3-7 Moving the inverter (2) Step 2 Lift the SOFAR 7.5KTLM from the packing case and move it to the installation position. To prevent device damage and personal injury, keep balance when moving the inverter because the inverter is heavy.

  • Page 24: Installing Sofar 7.5Ktlm

    User manual SOFAR 7.5KTLM 3.7. Installing SOFAR 7.5KTLM Step 1 Determine the positions for drilling holes, ensure the hole positions are level, then mark the hole positions using a marker pen, use the hammer drill to drill holes on the wall. Keep the hammer drill perpendicular to the wall, do not shake when drilling, so as not to damage the wall.
  • Page 25 User manual SOFAR 7.5KTLM Figure 3-9 - 20 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 26: Electrical Connections

    4.6KVA and max output of PV system is 13.8KVA. SOFAR 7.5KTLM has 2 MPPT trackers, all PV modules connected to the same MPPT should have similar rated electrical characteristics (including Isc, Voc, Im, Vm, Pm and temperature coefficients), have the...

  • Page 27: Electrical Connection

    User manual SOFAR 7.5KTLM Interface PV input interface DVCC AC output interface DVCC SD card interface DVCA RS485 interface DVCA CT interface DVCA Logic interface DVCA WiFi/GPRS/Ethernet interface DVCA 4.1. Electrical connection Figure 4-1 Shows the flowchart for connecting cables to the inverter.
  • Page 28 User manual SOFAR 7.5KTLM Procedure: Step 1 Remove the insulation layer with an appropriate length using a wire stripper, as shown in Figure 4-2. Figure 4-2 Preparing a ground cable (1) Note： L2 is 2 to 3mm longer than L1 Step 2 Insert the exposed core wires into the OT terminal and crimp them by using a crimping tool, as shown in Figure 4-3.

  • Page 29: Connecting Dc Input Power Cables

    User manual SOFAR 7.5KTLM Figure 4-4 Ground terminal composition 1.M5 screw、2.OT Terminal、3.Tapped hole 4.3. Connecting DC Input Power Cables Table 4-1 Recommended DC input cable specifications Cross-Sectional Area (mm ²) External Cable Diameter(mm) Range Recommended Value 4.0~6.0 4.5~7.8 Procedure Step 1 Remove cable glands from the positive and negative connectors.
  • Page 30 User manual SOFAR 7.5KTLM Figure 4-5 Connecting DC input power cables 1.Positive power cable 2.Negative power cable Note: L2 is 2 to 3 mm longer than L1. Step 3 Insert the positive and negative power cables into corresponding cable glands.
  • Page 31 User manual SOFAR 7.5KTLM Step 5 Insert crimped power cables into corresponding housings until you hear a "click" sound. The power cables snap into place. Step 6 Reinstall cable glands on positive and negative connectors and rotate them against the insulation covers.

  • 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 7.5KTLM to the AC power distribution frame (PDF) or power grid using AC output power cables.
  • Page 33 User manual SOFAR 7.5KTLM will cause a huge increase in the AC voltage, which may lead to a disconnection of the inverter from the electrical grid. The relationship between power loss in AC cable and wire length, wire cross sectional area is shown in the following figure：...
  • Page 34 User manual SOFAR 7.5KTLM Figure 4-12 Step 3 As shown in figure 4-13, remove the waterproof plug Put the finished output cable through the waterproof lock nut, Connect AC output cable as per the following requirements: Figure 4-13 Connect the yellow and green cable to the lock hole of AC terminal ...

  • Page 35: Rs485,Ct,Inverter Logic Interface Connection

    SOFAR 7.5KTLM waterproof cover and tighten it. Figure 4-14 4.5. RS485,CT,inverter logic interface connection The communication interface location of the SOFAR 7.5KTLM is shown in the figure below. Figure 4-15 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.
  • Page 36 User manual SOFAR 7.5KTLM Step1 Remove the communication waterproof cover using a screwdriver; Figure 4-16 Step2 Unlock the waterproof cable gland, remove the stopper in the waterproof connector; Figure 4-17 A3: Waterproof stopper Step3 Select appropriate cable according Table 4-2,remove the insulation...
  • Page 37 User manual SOFAR 7.5KTLM Table 4-4 Function description of the communication terminals Type RS485 Logic interface Connector Label The following RS485 RS485 table Function differential differential signal- signal+ Figure 4-18 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 .
  • Page 38 User manual SOFAR 7.5KTLM response commands within 2 s. The inverter will continue to respond while the mode remains asserted. Table 4-5 Function description of the DRMs terminal Pin NO. Color Function White and orange DRM1/5 Orange DRM2/6 White and green...
  • Page 39 User manual SOFAR 7.5KTLM Table 4-6 Function description of the terminal Pin NO. Pin name Description Connected to (RRCR) Relay contact 1 input K1 - Relay 1 output Relay contact 2 input K2 - Relay 2 output Relay contact 3 input...

  • Page 40: Wi-Fi/Gprs/Ethernet Module Installation Procedure

    User manual SOFAR 7.5KTLM Table 4-8 Function description of the terminal Pin NO. Pin name Description Connected to (RRCR) Relay contact 1 input K1 - Relay 1 output Not Connected Not Connected Not Connected Not Connected Not Connected Not Connected...

  • Page 41: Communication Method

    SOFAR 7.5KTLM Stpe3: Fasten Wi-Fi/GPRS/Ethernet module using screws. Figure 4-22 4.7. Communication method SOFAR 7.5KTLM gird-connected inverters offer RS485 (standard) and Wi-Fi (optional) communication modes: A. Communication between one inverter and one PC: 1. RS485 Refer to the figure shown below, connect the TX+ and TX- of the inverter to the TX+ and TX- of the RS485→...
  • Page 42 User manual SOFAR 7.5KTLM Figure 4-23 Wi-Fi/GPRS/Ethernet Refer to the figure shown below: (wireless function required for the PC). Figure 4-24 The operation information (generated energy, alert, operation status) of the inverter can be transferred to PC or uploaded to the server via Wi-Fi /GPRS/ Ethernet.
  • Page 43 User manual SOFAR 7.5KTLM Refer to the following figure: RS485 wires are connected in parallel between inverters, refer to section 4.5 of this manual for wire connection methods. Connect the TX+ and TX- of the inverter to the TX+ and TX- of the RS485→USB adapter;...
  • Page 44 User manual SOFAR 7.5KTLM Note1: The length of the RS485 communication cable should be less than 1000 m. Note2: When multiple inverters are connected via RS485 wires, set mod-bus address to differentiate the inverters. Note3: S/N number of the Wi-Fi/GPRS/Ethernet module is located on the side.

  • Page 45: Commissioning Of Inverter

    User manual SOFAR 7.5KTLM 5. Commissioning of inverter 5.1. Safety inspection before commissioning Ensure that DC and AC voltages are within the acceptable range of the inverter. Attention 5.2. Start inverter Step 1: Turn ON the DC switch.(optional) Step 2: Turn ON the AC circuit breaker.

  • Page 46: Operation Interface

    SOFAR 7.5KTLM 6. Operation interface Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 7.5KTLM Inverter. 6.1. Operation and Display Panel Buttons and Indicator lights Key-button: · Back :to return to previous menu or enter into main menu from the standard interface.

  • Page 47: Standard Interface

    User manual SOFAR 7.5KTLM ·Warning Light (RED) ON: ‘Fault’ or ‘Permanent’ state OFF: ‘Normal’ state ·GFCI Warning Light (RED) ON: ‘ID12: GFCI Fault’ or ‘ID20: GFCI Device Fault’ OFF: GFCI normal 6.2. Standard Interface - 42 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 48 User manual SOFAR 7.5KTLM When power-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. - 43 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 49 User manual SOFAR 7.5KTLM Inverter states includes: wait、check、normal、fault and permanent Wait:Inverter is waiting to Check State at the end of reconnection time. 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 50: Main Interface

    User manual SOFAR 7.5KTLM Main Interface 6.3. Normal ------Press “back” 1.Enter Setting 2.Event List 3.SystemInfo 4.Display Time 5.Software Update (A) “Enter Setting” Interface as below: 1.Enter ------Press “back” Setting 1.Set time 12.Set Safety Voltage 2.Clear Energy 13.Set Safety Frequency 3.Clear Events 14.Set Insulation...
  • Page 51 User manual SOFAR 7.5KTLM code country code country code country Germany VDE Korea Thailand PEA AR-N4105 CEI0-21 Sweden Thailand MEA Internal Australia Europe General LV-Range-50HZ Spain RD1699 CEI0-21 External EU EN50549 Tuekey Cyprus South Africa Denmark India AU-WA Greece Philippines...
  • Page 52 Default 01. 9. Set Input mode Input mode selection: SOFAR 7.5KTLM inverter has 2 MPPT channels,which can run independently or in parallel.Users choose the operation mode of MPPT according to the system design.Parallel mode is applicable to the case where two channels are in parallel, independent mode is applicable to the case where two channels of MPPT run independently, and the default mode is independent mode.
  • Page 53 User manual SOFAR 7.5KTLM Enable or disable reactive functions. 16. Set Power Derate Enable or disable the power derate function of the inverter, and set the derate ratio. 17. Reflux Power Enable or disable the anti-reflux function of the inverter, and set the reflux power.This function need to be used with external CT, please refer to this manual...

  • Page 54: Update Software Online

    SD card. 6.4. Update Software online SOFAR 7.5KTLM inverters offer software upgrade via SD card to maximize inverter performance and avoid inverter operation error caused by software bugs. Step 1 First,turn off the DC and AC breaker,and then remove the communication waterproof cover as the following picture.If the RS485 line has...
  • Page 55 Step 2 Insert the SD card into the compute. Step 3 SOFAR SOLAR will send the Software code to the user who needs to update. After user receive the file,please decompressing file and cover the original file in SD card.

  • Page 56: Trouble Shooting

    User manual SOFAR 7.5KTLM 7. 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. 7.1. Trouble shooting This section contains information and procedures for solving possible problems with the inverter.
  • Page 57 User manual SOFAR 7.5KTLM Table 7-1 Event list EventList EventList EventList Name solution description The power grid If the alarm occurs occasionally, the ID01 GridOVP voltage is too high possible cause is that the electric grid is abnormal occasionally. inverter automatically...
  • Page 58 User manual SOFAR 7.5KTLM If the fault occurs occasionally, the possible cause is that the external circuits are abnormal occasionally. inverter automatically returns to normal operating status after the fault is rectified. ID12 GFCIFault GFCI Fault If the fault occurs frequently and lasts a long...
  • Page 59 User manual SOFAR 7.5KTLM Internal faults of inverter, turn OFF the “DC The grid current is switch”, wait for 5 minutes, then turn ON the ID29 SwOCPInstan too high “DC switch”. Check whether the fault is rectified. If no, please contact technical support.
  • Page 60 User manual SOFAR 7.5KTLM temperature. The grid current is Unrecover too high, and has ID65 HwAcOCP cause unrecoverable hardware fault The bus voltage is Unrecover too high, and has ID66 BusOVP cause unrecoverable fault The grid current is Unrecover unbalance, and has...

  • Page 61: Maintenance

    User manual SOFAR 7.5KTLM Inverter records ID83 in case of remote The inverter has power derating operation. Check the wiring of ID83 RemoteDerating derated by the remote input and output control signal port on Remote control the communication board according to Section 4.5 of this user manual.
  • Page 62 User manual SOFAR 7.5KTLM Heat sink cleaning  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 63: Technical Data

    User manual SOFAR 7.5KTLM 8. Technical data Outlines of this chapter This topic lists the technical specifications for all SOFAR 7.5KTLM inverters. 8.1. Input parameters (DC) Technical Data SOFAR 7500TLM Recommended Max 9980Wp PV input power Max.DC power for 2750W*2/2750W single MPPT Max.Input voltage...

  • Page 64: Output Parameters (Ac)

    User manual SOFAR 7.5KTLM 8.2. Output parameters (AC) Technical Data SOFAR 7500TLM Rated Output power 7500W Max.Output power 7500VA Max.Output current 32.6A Nominal grid voltage L/N/PE,220Vac 230Vac 240Vac Grid voltage range 180-276Vac( According to local grid standard ) Nominal grid...

  • Page 65: Efficiency,Protection And Communication

    User manual SOFAR 7.5KTLM 8.3. Efficiency,Protection and Communication Technical Data SOFAR 7500TLM Max.Efficiency 98.2% Euro Efficiency 97.6% MPPT Efficiency >99.9% Self-consumption at <1W night Safety protection Anti islanding,RCMU,Ground fault monitoring EN 61000-6-2, EN 61000-6-3, EN 61000-3-2, EN 61000-3-3, EN 61000-3-11, EN 61000-3-12...

  • Page 66: General Date

    User manual SOFAR 7.5KTLM 8.4. General Date Technical Data SOFAR 7500TLM Topology Transformerless Ambient temperature -30~60℃ range Permissible humidity 0~100% range Noise figure <25dB DC Switch Optional Cooling Natural convection Max.Operating altitude 2000m Outline Dimension 467*352*157mm Bracket Wall-mounted Weight 18kg...

  • Page 67: Quality Assurance

    User manual SOFAR 7.5KTLM 9. 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: 1. Purchase invoice provided by the customer: the first flight provides a standard warranty period of 60 months (5 years) from the invoice date;...
  • Page 68 User manual SOFAR 7.5KTLM they fail during the extended warranty period, customers need to purchase and replace them from the our company. Once the extended warranty service is purchased, our company will issue the extended warranty card to the customer to confirm the extended warranty period.
  • Page 69 User manual SOFAR 7.5KTLM Statement If you have purchased this product in Australia, you should be aware that this warranty is provided in addition to other rights and remedies held by a consumer at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law.
  • Page 70 ADD: 401, Building 4, AnTongDa Industrial Park, District 68,XingDong Community, XinAn Street, BaoAn District, Shenzhen, GuangDong.P.R. China Email: service@sofarsolar.com Tel: 0510-6690 2300 Web: www.sofarsolar.com...

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7500tlm7.5ktlm

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