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Summary of Contents for Sofar 25KTLX-G3
- Page 1 SOFAR 25 … 50KTLX-G3 Installation and operating manual Version 01 | March 2023 English SOFAR 25KTLX-G3, 30KTLX-G3, 30KTLX-G3-A, 33KTLX-G3, 36KTLX-G3, 40KTLX-G3, 45KTLX-G3, 50KTLX-G3...
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Page 2: Table Of Contents
Symbols used Basic safety information Safety information Symbols and signs Product features Product dimensions Power grid types Product dimensions Labelling on the device Functional features Efficiency curve Installation Installation information Installation procedure Examination before installation Connections SOFAR 25 ... 50KTLX-G3... - Page 3 Communication ports Energy meter connection System monitoring Commissioning the inverter Safety test before commissioning Starting the inverter Smartphone app SOFAR View Operation of the device Control panel and display field Standard display Status display Menu structure SOFAR 25 ... 50KTLX-G3...
- Page 4 TABLE OF CONTENT Software update Troubleshooting handling Troubleshooting Maintenance Technical data SOFAR 25 ... 50KTLX-G3...
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Page 5: About This Manual
The current version was updated on 12/07/2023. Structure of the manual This manual contains important safety and installation instructions that must be observed during installation and maintenance of the device. SOFAR 25 ... 50KTLX-G3... -
Page 6: Scope
Scope This product manual describes the installation, electrical connection, commissioning, maintenance and fault elimination procedures of the SOFAR 25 ... 50KTLX-G3 inverters. Target group This manual is intended for specialist electrical engineers who are responsible for the installation and commissioning of the inverter in the PV system, as well as the PV system operators. - Page 7 Follow the warnings in order to prevent injury! ATTENTION Non-observance may result in property damage! • Follow the warnings in order to prevent damage to or destruction of the product. NOTE • Provides tips essential to the optimal operation of the product. SOFAR 25 ... 50KTLX-G3...
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Page 8: Basic Safety Information
Before installing the device or carrying out maintenance on it, you must open the DC switch in order to interrupt the DC voltage of the PV generator. You can also switch off the DC voltage by opening the DC SOFAR 25 ... 50KTLX-G3... - Page 9 Choose a suitable place for the installation of electrical devices. Ensure that there is sufficient space for an emergency exit which is suitable for maintenance. Ensure sufficient ventilation in order to guarantee an air circulation for the cooling of the inverter. SOFAR 25 ... 50KTLX-G3...
- Page 10 Dangerous DC voltage • Before establishing the electrical connection, cover the PV modules using opaque material or disconnect the PV generator from the inverter. Solar radiation will cause dangerous voltage to be generated by the PV generator! SOFAR 25 ... 50KTLX-G3...
- Page 11 • Do not touch the terminal or the conductor which is connected to the electrical grid. • Follow all instructions and observe all safety documents that refer to the grid connection. SOFAR 25 ... 50KTLX-G3...
- Page 12 • The internal components of the inverter must NOT be opened without the relevant authorisation. Shenzhen SOFARSOLAR Co., Ltd. assumes no responsibility for any resulting losses or defects. SOFAR 25 ... 50KTLX-G3...
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Page 13: Symbols And Signs
2.2.1 Symbols on the inverter Several symbols pertaining to safety can be found on the inverter. Please read and understand the content of these symbols before starting the installation. SOFAR 25 ... 50KTLX-G3... - Page 14 Device degree of protection according to EN 60529 Positive and negative poles of the DC input voltage The inverter must always be transported and stored with the arrows pointing upward The temperature range in which the inverter can operate SOFAR 25 ... 50KTLX-G3...
- Page 15 BASIC SAFETY INFORMATION Symbol Description RCM (Regulatory Compliance Mark) The product meets the requirements of the applicable Australian standards. SOFAR 25 ... 50KTLX-G3...
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Page 16: Product Features
This chapter describes the product features, dimensions and efficiency levels. Product dimensions The SOFAR 25 ... 50KTLX-G3 is a grid-coupled PV inverter with up to two MPPTs which converts the direct current generated by PV systems into a three-phase alternating current and feeds it into the public power grid. -
Page 17: Power Grid Types
PRODUCT FEATURES Power grid types SOFAR 25 ... 50KTLX-G3 are compatible with the following grid types: TN-C-S TN-C TN-S Transformer Transformer Transformer 25~50KTLX-G3 25~50KTLX-G3 25~50KTLX-G3 Transformer Transformer 25~50KTLX-G3 25~50KTLX-G3 NOTE • For the TT grid, voltage between N and PE should be less than 30 V. - Page 18 PRODUCT FEATURES 585.0 231.0 front, side, back bottom view 4-12.0 126.0 126.0 403.0 36.0 wall bracket SOFAR 25 ... 50KTLX-G3...
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Page 19: Labelling On The Device
NOTE • SOFAR 25 ... 36KTLX-G3 inverters support 6-channel PV string input. • SOFAR 40 ... 50KTLX-G3 and the HV models support 8- channel PV string input. Labelling on the device Labelling must not be covered or removed! Functional features The DC output generated by the PV generator is filtered by the input board before it reaches the power board. - Page 20 Data transfer The inverter (or a group of inverters) can be monitored remotely via the RS485 communication bus or via WiFi/GPRS. Software update The device supports local updates via USB stick and remote updates via WiFi/GPRS. SOFAR 25 ... 50KTLX-G3...
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Page 21: Efficiency Curve
Input Inverter Circuit Protect Circuit Port Circuit MPPT Circuit Circuit Circuit 3 MPPT Circuit 4 Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Efficiency curve Vpv=540v Vpv=620v Vpv=850v 100% % of Rated Output Power Power efficiency curve (SOFAR 50KTLX-G3) SOFAR 25 ... 50KTLX-G3... - Page 22 PRODUCT FEATURES 180 190 200 210 220 230 240 250 260 270 280 290 300 Vgrid (V) Rated power ratio vs. Grid voltage SOFAR 25 ... 50KTLX-G3...
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Page 23: Installation
Choose a suitable installation location and -surface. • Commission a minimum of two persons with the installation of the inverter. • Do not set down the inverter upside-down. Installation procedure Mechanical installation is performed as follows: Examine the inverter before installation SOFAR 25 ... 50KTLX-G3... -
Page 24: Examination Before Installation
24 hours before installing the inverter. 4.3.2 Checking the delivery scope After unpacking the inverter, check that the delivery items are both intact and complete. In the event of any damage or missing components, contact the wholesaler. SOFAR 25 ... 50KTLX-G3... - Page 25 INSTALLATION Image Description Quantity Inverter SOFAR 25 ... 50KTLX-G3 Wall bracket AC waterproof cover M8*80 Hexagon screws PV+ metal pin 6 / 8* PV- metal pin 6 / 8* PV+ input terminal 6 / 8* PV- input terminal 6 / 8*...
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Page 26: Connections
WiFi stick logger R-type terminal (PE) R-type terminal (L1/L2/L3/N) Manual Warranty card Warranty registration form *) second Pcs. for SOFAR 40…50KTLX-G3 + SOFAR 50KTLX-G3-HV Tools Prepare the tools required for the installation and the electrical connection. No. Tool Model Function... - Page 27 Crimping tool Used to crimp power cables Multimeter Used to check the earthing Marker Used for marking Measuring tape Used to measure distances Spirit level Used to align the wall bracket ESD gloves for the installer SOFAR 25 ... 50KTLX-G3...
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Page 28: Installation Location
Socket wrench Used install expansion bolts Hammer Used install expansion bolts Installation location Choose a suitable position for the installation of the inverter. Ensure that the following requirements have been fulfilled: SOFAR 25 ... 50KTLX-G3... - Page 29 INSTALLATION Minimum distances for individual SOFAR 25 ... 50KTLX-G3 inverters: Minimum distances for several SOFAR 25 ... 50KTLX-G3 inverters: SOFAR 25 ... 50KTLX-G3...
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Page 30: Unpacking The Inverter
INSTALLATION Unpacking the inverter Open the packaging and have at least two people grip underneath the inverter at both sides. Lift the inverter out of the packaging and move it to its installation position horizontally. SOFAR 25 ... 50KTLX-G3... -
Page 31: Installation Of The Inverter
Put the wall bracket aside and drill the holes. Fasten the rear panel to the wall using the M8*80 screws. Place the inverter in the wall bracket. Secure the inverter to the wall bracket using the Error! Reference source not found.. SOFAR 25 ... 50KTLX-G3... - Page 32 INSTALLATION SOFAR 25 ... 50KTLX-G3...
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Page 33: Electrical Connections
ELECTRICAL CONNECTIONS Electrical connections Safety instructions This topic describes the electrical connections of the inverter SOFAR 25 ... 50KTLX-G3. Read this section thoroughly and carefully before connecting the cables. DANGER Electrical voltage at the DC connections • Ensure that the DC switch is OFF before establishing the electrical connection. -
Page 34: Electrical Connection
SOFAR 40KTLX-G3-HV 3*50 A 53.0 A SOFAR 50KTLX-G3-HV 4*50 A 66.2 A Electrical connection The electrical connection is established as follows: Connect PE cable Connect DC input cable Connect AC output power cable Connect communication cable (optional) SOFAR 25 ... 50KTLX-G3... -
Page 35: Connecting The Pe Cables
PV input ports (negative) ⑤ WiFi/GPRS/Ethernet ⑥ COM Port (RS485) ⑦ AC output ⑧ Fans Connecting the PE cables Connect the inverter to the equipotential bonding bar by using the protective earth cable (PE) for grounding. SOFAR 25 ... 50KTLX-G3... - Page 36 Note: L2 is 2 to 3 mm longer than L1 Crimp the cable to the ring terminal. Recommended OT terminal: OT-M6. Tighten the crimped ring terminal with the M6 screw by using a torque wrench of 5 to 7 Nm: SOFAR 25 ... 50KTLX-G3...
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Page 37: Connecting The Dc Cables
Maximum tolerance voltage ≥ 1100 V Please observe the recommended cable dimensions: • Cu cable cross section: 2.5 ... 6 mm • Cable outside diameter: 6 ... 9 mm Insert the positive and negative DC cables into the corresponding cable glands. SOFAR 25 ... 50KTLX-G3... - Page 38 ELECTRICAL CONNECTIONS ① Positive DC cable ② Negative DC cable Use a crimping plier to crimp the DC cables. CAUTION Danger of reverse polarity! • Ensure that the polarity is correct before plugging into the DC connections! SOFAR 25 ... 50KTLX-G3...
- Page 39 Connect the DC connector to the inverter. Removing the connectors CAUTION Danger of DC arcing • Before removing the plus and minus connector, ensure that the DC switch has been set to OFF. SOFAR 25 ... 50KTLX-G3...
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Page 40: Connecting The Ac Power Cables
The AC disconnecting device must be easily accessible. NOTE • The inverter SOFAR 25 ... 50KTLX-G3 has a built-in AFI (univ. sensitive residual current protection). If an external AFI is required, we recommend an AFI type A or B RCD featuring a residual current of 100 mA or more. - Page 41 ELECTRICAL CONNECTIONS Dimensioning For correct installation, five-core outdoor cables should be used. To simplify the installation process, use flexible cables. The recommended cable specifications are listed in the following table. SOFAR 25 ... 50KTLX-G3...
- Page 42 The AC circuit breaker must comply to I△N=0.1A • The resistance at connection point must less than 2Ω You need to use five core outdoor cables, the recommended AC cable and residual current device (RCD) can be used as below table: SOFAR 25 ... 50KTLX-G3...
- Page 43 ELECTRICAL CONNECTIONS If a RCD is required under local regulations, SOFAR recommends a type A or B RCD with sensitivity of 100 mA or higher. Where local electricity code requires an RCD with a lower leakage rating, the discharge current might result in nuisance tripping of the external RCD.
- Page 44 Remove the waterproof cover with a screwdriver, and remove the stopper from the waterproof cable gland; Select the suitable cable according to the table above. Remove the insulating layer of the AC output cable using a wire stripper and in SOFAR 25 ... 50KTLX-G3...
- Page 45 Insulating sleeve Connect the cables to the AC terminal block and tighten the M8 screws (6 ... 10 Nm) and M6 screws (5 ... 7 Nm). Then tighten the AC cover screws (2 ... 3 Nm); SOFAR 25 ... 50KTLX-G3...
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Page 46: Communication Ports
When an aluminum cable is used, a copper/aluminum conversion terminal is required. This is supplied together with the copper terminals. Communication ports The SOFAR 25 ... 50KTLX-G3 inverters come with one of the following two COM ports and one USB port. 1:USB Port 2:COM Port... - Page 47 ELECTRICAL CONNECTIONS 5.7.2 COM port Please follow below steps to install the COM cable according to the correct COM port (check the corresponding type A or B): SOFAR 25 ... 50KTLX-G3...
- Page 48 RS485 Signal + RS485 B2 RS485 Signal - Grounding GND.S Signal GND Logic interface for power DRM0 Remote shutdown control remote DRM1/5 Digital input 1 shutdown DRM2/6 Digital input 2 DRM3/7 Digital input 3 DRM4/8 Digital input 4 SOFAR 25 ... 50KTLX-G3...
- Page 49 The inverter recognises all supported Demand Response commands and initiates the reaction within two seconds. The inverter remains in the reduced power mode as long as the input is closed. Supported DRM commands are pre-configured: DRM0, DRM5, DRM6, DRM7, DRM8: SOFAR 25 ... 50KTLX-G3...
- Page 50 Note Digital Input Grounding GND.S Signal GND DRMs/Logic DRM0 Remote shutdown Interface DRM1/5 0% power feed-in DI 5 DRM2/6 50% power feed-in DI 6 DRM3/7 75% power feed-in DI 7 DRM4/8 100% power feed-in DI 8 SOFAR 25 ... 50KTLX-G3...
- Page 51 The inverter remains in the reduced power mode as long as the input is closed. Grid Protection Relays PIN: 9 10 11 12 PIN: 9 10 11 12 GND K0 GND 0 GND 0 kΩ K1 K2 K3 K4 Ripple Control Receiver SOFAR 25 ... 50KTLX-G3...
- Page 52 GND.S Signal GND DRMs/Logic Interface DRM0 Remote shutdown DRM1/5 0% power NOTE • The Logic interface has to be activated in the LCD screen of the inverter, or with SOFAR View App: DRM0 active: Remote Shutdown SOFAR 25 ... 50KTLX-G3...
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Page 53: Energy Meter Connection
(PCC) below a defined setpoint. To use the feed-in limitation function, an external SmartMeter has to be connected to measure the power flow at the PCC: SOFAR Part Product Type Smart Meter (3-phase, 901.00000048-1 Chint DTSU666 1,5(6)A CT's) SOFAR 25 ... 50KTLX-G3... - Page 54 Hard Feed-in Control When the Hard Feed-in Control is activated, the inverter shuts down whenever the setpoint is exceeded Ctrl. Total Power Limit the power of the feeding-in phases to the setpoint. Ignore the SOFAR 25 ... 50KTLX-G3...
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Page 55: System Monitoring
Ctrl. Selling Power Limit the feed-in power of each phase to 1/3 of the setpoint System monitoring The SOFAR 25 ... 50KTLX-G3 inverters provide various communication methods for the system monitoring: RS485 or WiFi stick (standard), GPRS or Ethernet stick (optional). 5.9.1... - Page 56 When you have installed the stick logger, the inverters can directly upload your operating, energy and alarm data in the SolarMAN monitoring portal. NOTE • The Stick Loggers are using the outgoing TCP port 10000, which could be blocked in some internet routers SOFAR 25 ... 50KTLX-G3...
- Page 57 Preparation: The WiFi stick is installed in accordance with the previous section and the SOFAR inverter must be in operation. Carry out the following steps in order to configure the WiFi stick: Connect your PC or smartphone with the WiFi network of the WiFi stick.
- Page 58 Go to the newly created system in order to configure the stick logger (device/logger) Press the button on the WiFi stick for 1 second to activate the WPS mode of the stick so that the smartphone can be connected to the WiFi stick. SOFAR 25 ... 50KTLX-G3...
- Page 59 On: Logger connected to inverter Off: No connection to inverter READY Logger status Flashing (1 sec.): Normal status Flashing (0.1 sec.): Reset running Off: Error status Reset button Keystroke Description 1 sec. WPS mode SOFAR 25 ... 50KTLX-G3...
- Page 60 The Ethernet stick is delivered with DHCP as standard, so it automatically gets an IP address from the router. If you wish to set up a fixed IP address, connect a PC to the Ethernet stick and open the configuration page via the web address 10.10.100.254. SOFAR 25 ... 50KTLX-G3...
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Page 61: Commissioning The Inverter
PV inverters. • Ensure that you have selected the correct country code according to regional authority requirements, and consult a qualified electrician or employees of electrical safety authorities. SOFAR 25 ... 50KTLX-G3... -
Page 62: Smartphone App Sofar View
The inverter continuously checks the set limits and, if required, disconnects the device from the grid. Smartphone app SOFAR View The app is available for Android and iOS systems and allows for easy initial setup as well as advanced configurations. -
Page 63: Operation Of The Device
OPERATION OF THE DEVICE Operation of the device This chapter describes the LCD and LED displays of the SOFAR 25 ... 50KTLX-G3 inverter. Control panel and display field 7.1.1 Buttons and display lights Buttons Button Name Description Short press: Select previous menu item... -
Page 64: Standard Display
“Error” or “Continuous” state. Normal The inverter goes into the “Normal” state, and feeds current into the grid Fault The inverter goes into the “Fault” state if an error fault occurs. normally reset automatically by the inverter. SOFAR 25 ... 50KTLX-G3... -
Page 65: Menu Structure
Deletes the total energy yield of the inverter 3. Clear events Deletes historical events recorded in the inverter 4. Country Code Sets the country and standard applicable to the current application conditions and requirements. Before setting this, ensure that SOFAR 25 ... 50KTLX-G3... - Page 66 13. PCC select Select either PCC Meter (default) or PCC ARPC. 14. Feed-in limit mode Select from below: (please refer to 5.8) Feed-in Control / Hard Feed-in Control Ctrl. Total Power (default) Ctrl. Phase Power Ctr. Selling Power SOFAR 25 ... 50KTLX-G3...
- Page 67 The most recent events are listed at the top. 2. Event list 1. Current event 2. Event “History Fault information 001 ID04 06150825 (display of the event sequence number, event ID number and time that the event takes place) SOFAR 25 ... 50KTLX-G3...
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Page 68: Software Update
Insert the USB stick into the computer. SOFARSOLAR will send the firmware update to the user. Unzip the file and copy the original file to a USB stick. Attention: The firmware update file must be in the “firmware” subfolder! SOFAR 25 ... 50KTLX-G3... - Page 69 LCD screen goes out 11. Re-establish a watertight communication connection 12. Switch the DC and AC circuit breaker back on 13. You can check the current software version in item “3. Software version” of the SystemInfo menu. SOFAR 25 ... 50KTLX-G3...
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Page 70: Troubleshooting Handling
Please proceed as follows to display the recorded problems: Hold the button down to bring up the main menu of the standard interface. Select “2. Event list” and hold the button down to bring up the event list. SOFAR 25 ... 50KTLX-G3... - Page 71 If it is, check the AC circuit breaker and the AC cables of the inverter. If the alarm occurs repeatedly, contact technical support department in order to adjust the voltage and frequency limits after SOFAR 25 ... 50KTLX-G3...
- Page 72 If the error occurs frequently and lasts for a prolonged period, check whether the insulation resistance between the PV generator and earth (ground) is too low and examine the PV cable insulation. SOFAR 25 ... 50KTLX-G3...
- Page 73 If not, GFCIDeviceF GFCI measurement error please contact the technical support ault department. MChip_Fault Master chip error HwAuxPower Auxiliary voltage error Fault BusVoltZeroF Bus voltage measurement ault error IacRmsUnbal The output current is not ance balanced SOFAR 25 ... 50KTLX-G3...
- Page 74 If not, please contact the technical support department. SwBOCPInst The input current is too Check whether the input current is high higher than maximum permissible input current of the inverter, then check the input cables. If both are correct, please SOFAR 25 ... 50KTLX-G3...
- Page 75 DSP and the slave DSP is not consistent SpiCommLos The SPI communication between the master DSP and the slave DSP is faulty SciCommLos The SCI communication between the control board and communications board is faulty SOFAR 25 ... 50KTLX-G3...
- Page 76 If not, UnrecoverBu The bus voltage is too high please contact the technical support sOVP caused department. unrectifiable error UnrecoverIac grid current RmsUnbalan unsymmetrical caused unrectifiable error UnrecoverIpv input current Unbalance unsymmetrical caused unrectifiable error SOFAR 25 ... 50KTLX-G3...
- Page 77 Check whether the ambient temperature installation location exceeds the upper limit value. If so, improve the ventilation in order to reduce the temperature. SOFAR 25 ... 50KTLX-G3...
- Page 78 Softwareversi The the control board and Contact technical support onisnotconsis communications board department in order to upgrade the tent software is not consistent software. SOFAR 25 ... 50KTLX-G3...
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Page 79: Maintenance
Check the heat sink for blockages (dust, snow etc.) and remove them if present. Please clean the heat sink using an air blower and a dry, soft cloth or a soft bristle brush. Do NOT clean the heat sink with water, corrosive chemicals, cleaning agents etc. SOFAR 25 ... 50KTLX-G3... - Page 80 Unscrew the six screws at the four corners of the fan housing: Unscrew the screws at the fan position, unplug the terminals at the interface between the fan and the inverter and then remove the fan: SOFAR 25 ... 50KTLX-G3...
- Page 81 TROUBLESHOOTING HANDLING Use a soft brush to clean the fan. In case of damage, ensure to replace it in time. Reinstall the inverter according to the above steps. SOFAR 25 ... 50KTLX-G3...
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Page 82: Technical Data
44000 50000 55000 Max. output current (A) 42.4 51.5 56.0 60.6 66.7 75.8 83.3 Rated grid voltage 3 / N / PE, 230 / 400 Grid voltage range 310 – 480 Vac (according to local standard) SOFAR 25 ... 50KTLX-G3... - Page 83 Feed-in limitation function DC switch Input / output SPD PV: type II standard, AC: type II standard Communication Standard RS485 / WiFi / Bluetooth, optional: Ethernet communication mode General Data Ambient temperature -30℃ – 60℃ SOFAR 25 ... 50KTLX-G3...
- Page 84 EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4 Safety standards IEC 62109-1/2, IEC 62116, IEC 61727, IEC 61683, IEC 60068(1,2,14,30), IEC 60255 VDE V 0124-100, V 0126-1-1, VDE-AR-N 4105, CEI 0-21/CEI 0-16, Grid standards UNE 206 007-1, EN 50549, G98/G99, EN 50530 SOFAR 25 ... 50KTLX-G3...
- Page 85 Shenzhen SOFARSOLAR Co., Ltd. 11/F, Gaoxinqi Technology Building, District 67, XingDong Community, XinAn Street, Bao’An District, Shenzhen, China SOFARSOLAR GmbH Krämerstrasse 20 72764 Reutlingen Germany Email: service.uk@sofarsolar.com Web: www.sofarsolar.com...
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