Sungrow SG1K5TL-31 User Manual
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Sungrow SG1K5TL-31 User Manual

Sungrow SG1K5TL-31 User Manual

Pv grid-connected inverter
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  • Page 3: About This Manual

    About This Manual Thank you for purchasing the inverter SG1K5TL-31 from Sungrow. We hope that the device will meet your satisfaction when you use it with your PV plant system. This manual contains detailed product information, operation instructions and safety instructions that must be understood and obeyed during installation and maintenance of the inverter.
  • Page 4 Symbols Explanation Important instructions contained in this manual should be followed during installation, operation and maintenance of the inverter. And they will be highlighted by these symbols. DANGER indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

  • Page 5: Table Of Contents

    Contents SAFETY AND PRODUCT INFORMATION ..............1   1 Safety Instructions ....................3   2 Product Introduction ....................9   2.1 Intended Usage ..........................10   2.2 Principle Description ........................11   2.3 Product Description ........................12   2.3.1 Product Appearance ....................... 12   2.3.2 Dimensions and Weight of Inverter ..................
  • Page 6 5.6.1 Safety ............................. 36   5.6.2 Assembling AC Cables to Connector ..................38   5.6.3 AC Wiring Procedure ......................39   5.7 Grounding of Inverter ........................40   5.8 Disconnection of Inverter ........................ 41   5.9 Connecting Communication Cable ....................42   5.9.1 Monitoring System ........................

  • Page 7: Safety And Product Information

    SAFETY AND PRODUCT INFORMATION  FOR INSTALLER AND USER...

  • Page 9: Safety Instructions

    Safety Instructions About This Chapter This chapter provides crucial safety instructions about SG1K5TL-31. Please read “Safety Instructions” carefully before any work with inverter.

  • Page 10: Important Safety Instructions

    User Manual IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Inverter SG1K5TL-31 has been designed and tested strictly according to the international safety regulations. However, for electrical and electronic equipment, safety instructions related to electrical device must be complied with during installation, commissioning, operation and maintenance.

  • Page 11: Before Installation

    Safety Instructions Before Installation There is a risk of injury due to improperly handling the device! Always follow the instructions contained in the manual when moving and positioning the inverter. The weight of the equipment can cause injuries, serious wounds, or bruising if it is not handled correctly.

  • Page 12: Maintenance And Service

    SG1K5TL-31 User Manual During Inverter Operation There is a risk of inverter’s damage or personal injury! Do not disconnect DC connectors while the inverter is under AC load! First de-energize the equipment from dual power sources and verify that there is no voltage present.
  • Page 13 Safety Instructions There is a risk of inverter damage or personnel injury due to incorrect service work! Always keep in mind that inverter is power supplied by dual power source: PV arrays and utility grid. Before any service work, you should obey the following procedures. Disconnect inverter from the utility grid side first and then PV arrays;...
  • Page 14 SG1K5TL-31 User Manual Others The selected country settings can be changed by service personnel only! Unauthorized access to country settings should be prohibited. Alternation of the country settings may cause a breach of the type-certificate marking. All safety instructions, warning labels and nameplate on the inverter body: Must be clearly visible;...

  • Page 15: Product Introduction

    Product Introduction About This Chapter This chapter introduces intended use, main circuits and constituent parts of the inverter SG1K5TL-31.

  • Page 16: Intended Usage

    SG1K5TL-31 is robust, grid-connected, transformer-less and of high conversion efficiency. SG1K5TL-31 inverter converts DC power generated from the PV arrays into stable AC current, and then directly feeds the AC power into the utility grid. It is a crucial unit in the small-scaled PV power system.

  • Page 17: Principle Description

    Product Introduction Principle Description The principle design of the SG1K5TL-31--a transformer-less and grid-connected inverter can be known from the block diagram Fig 2-2. The PV array voltage connected to the inverter input is always positive and is initially regulated by the Boost circuit and then converted into alternating current by the full bridge circuit inverter.

  • Page 18: Product Description

    SG1K5TL-31 User Manual Product Description 2.3.1 Product Appearance Fig 2-3 Product Description Item Name Description LCD display panel A friendly human-computer interaction interface. Running data and configuration parameters are displayed in the LCD screen. AC terminal Inverter feeds power via this terminal.

  • Page 19: Dimensions And Weight Of Inverter

    Table 2-1 Dimensions Value Type W(mm) H(mm) D(mm) Net weight(kg) SG1K5TL-31 2.3.3 LCD Display Panel As a friendly human-computer interface, LCD display panel comprises LED indicators, buttons and LCD screen. LEDs indicate the current state of the inverter The current running information shown in the LCD screen...

  • Page 20: Dc Switch

    SG1K5TL-31 User Manual Item Name Description LCD screen can display the current state of inverter, current running screen information, history information and parameters to be set. Buttons User can operate the LCD menu of the inverter via the two buttons.

  • Page 21: Installation And Maintenance Information

    INSTALLATION AND MAINTENANCE INFORMATION  ONLY FOR INSTALLER...

  • Page 23: Installation Flow

    Installation Flow About This Chapter This chapter demonstrates installation flow from unpacking to successful commissioning.
  • Page 24 SG1K5TL-31 User Manual The following diagram shows the installation flow of inverter for installer. Please follow these procedures. Fig 3-1 Installation Flow Chart Table 3-1 Description of Installation Flow Order Description Remark Unpacking the inverter and inspection Section 4.1 Read this manual, especially the section on “safety instruction”...

  • Page 25: Installing Inverter Onto Wall

    Installing Inverter onto Wall About This Chapter This chapter provides information about choose installation site and gives step-by-step procedures to install the inverter onto the wall. And related safety instructions are also included.

  • Page 26: Unpacking And Inspection

    SG1K5TL-31 User Manual Unpacking and Inspection The unit is thoroughly tested and inspected strictly before delivery. Although sturdy packaging is used, damage may still occur during shipping. Check the packing for any visible damage upon receiving. Check the inner contents for damage after unpacking.

  • Page 27: Nameplate

    Sungrow. Fig 4-2 Nameplate of Inverter SG1K5TL-31 * Image shown here is indicative only. Actual product you receive may differ. Item...

  • Page 28: Delivery Contents

    SG1K5TL-31 User Manual Delivery Contents Fig 4-3 Delivery Contents Item Description Inverter Backplate Fastener DC connector AC connector RS485 connector User manual Packing list and test report Quality certificate...

  • Page 29: Storage Of Inverter

    During the storage time, periodically check whether any visible damage by rats. Replace the package if necessary. After long term storage, local installer or service dept. of Sungrow should perform a comprehensive test before connecting the inverter into PV power system.
  • Page 30 SG1K5TL-31 User Manual 4. Do not install the unit on wall of flammable materials. 5. Install the unit at eye level for easily buttons operation and display read. 6. It is suggested that the inverter be installed vertically with upside up for good heat dissipation.
  • Page 31 Installing Inverter onto Wall 9. The ambient temperature should range from Max. ambient temperature: -25°C to 60°C. When ambient temperature +60°C exceeds 45°C, the power output will reduce. Min. ambient temperature: 10. The relative humidity of chosen installation site -25°C should never exceed 95%.

  • Page 32: Moving Inverter

    SG1K5TL-31 User Manual 13. Do not install the inverter in a closed cabinet. Otherwise the inverter will not operate normally. Closed Cabinet 14. Do not install inverter where children can reach. 15. Do not install inverter in living area. Noise can be produced during running of inverter, which may affect your daily life.

  • Page 33: Installation Procedure

    Installing Inverter onto Wall Installation Procedure There is a backplate and fasteners supplied to install the inverter. If you don’t want to use the supplied backplate, you can drill holes referring to its dimension below. Fig 4-4 Dimensions of Backplate(unit: mm) Fig 4-5 Dimensions of Fastener Set (unit: mm) INSTALLATION PROCEDURE: Step 1: Get the supplied backplate and fasteners from the packaging.
  • Page 34 SG1K5TL-31 User Manual In order to avoid electrical shock or other injury, inspect existing electronic or plumbing installations before drilling holes. Step 5: Fasten the backplate against the wall with the supplied fastener. Step 6: Lift up the inverter above the backplate and then slide down to make sure that...

  • Page 35: Electrical Connection

    Electrical Connection About This Chapter This chapter proposes step-by-step procedures to perform electrical connection and related safety instructions.

  • Page 36: General Safety Instruction

    SG1K5TL-31 User Manual General Safety Instruction Improper operation during the wiring process can cause fatal injury to the operator or unrecoverable inverter damage. Only qualified personnel can perform the wiring work. All electrical installations must be in accordance with local and national electrical codes.

  • Page 37: Terminals Description

    Electrical Connection Terminals Description All electrical terminals are located at the bottom of the unit, as the following diagram shows. Enough space should be kept for electrical connection at the bottom of the inverter when choosing the installation site. Fig 5-1 Terminals Description Specifications of Cables All cables for PV power system are equipped with water-proof direct plug-in connectors.

  • Page 38: Overview Of Electrical Connection

    Item Description Remark PV arrays The maximum open-circuit voltage of each PV string is 450V. SolarInfo It can be ordered from Sungrow. logger Remote PC User uses this device to monitor the whole PV system. AC circuit Used as a protective device during electrical connection. User equips breaker this device according to maximum output voltage and current.

  • Page 39: Connecting Inverter To Pv Arrays

    Electrical Connection Connecting Inverter to PV Arrays 5.5.1 Safety As input of the inverter in the PV power system, PV Arrays’ features should be paid attention to. Please refer to PV module’s data sheet. When designing PV arrays, following requirements should be met. Lethal voltage exists! Do cover the PV arrays with light-tight materials.

  • Page 40: Assembling Dc Cable To Connector

    SG1K5TL-31 User Manual 5.5.2 Assembling DC Cable to Connector All DC cables are equipped with water-proof direct plug-in connectors, which mate with DC terminals at the bottom of the inverter. The positive and negative connectors are marked with polarity symbols and should be equipped with correctly colored cable.

  • Page 41: Dc Wiring Procedure

    Electrical Connection 5.5.3 DC Wiring Procedure Step 1: Assemble the DC cables to the corresponding connectors at the inverter side. See “5.5.2 Assembling DC Cable to Connector”. Step 2: Manually rotate the DC switch at the bottom of the inverter to the “OFF” position.

  • Page 42: Connecting Inverter To Ac Grid

    Grid Frequency 47~52.5Hz/57~62.5Hz The grid connection of inverter SG1K5TL-31 is made via 3 wires (L, N and PE). Feeding power is always single-phase via AC terminal at the bottom of the unit. An appropriately sized AC circuit breaker is suggested as a protection equipment in AC connection, as shown in Fig 5-2.
  • Page 43 Electrical Connection Requirements: The sum of all inverters in parallel connection is limited to ten. n(L1)+n(L2)+n(L3)≤10. Inverters should be distributed as equally as possible between the three phases with maximum unbalanced load of 4.6kVA. Scenario 3: Several inverters are operated in parallel connection to low-voltage side of MV transformer.

  • Page 44: Assembling Ac Cables To Connector

    SG1K5TL-31 User Manual 5.6.2 Assembling AC Cables to Connector Inverter is equipped with water-proof direct plug-in connectors for AC connection, which mate with AC terminals at the bottom of the inverter. “L”, “N” and “PE” should be equipped with correctly colored cables for distinguishing.

  • Page 45: Ac Wiring Procedure

    Electrical Connection 5.6.3 AC Wiring Procedure Assignment of AC cables should be paid attention to, especially “PE” wire. Step 1: Assemble AC cables to connector supplied. See “5.6.2 Assembling AC Cables to Connector”. Step 2: Make sure that the AC circuit breaker is disconnected and DC switch is rotated to the “OFF”...

  • Page 46: Grounding Of Inverter

    SG1K5TL-31 User Manual Grounding of Inverter Because of the transformer-less design of the inverter, the DC positive pole and DC negative pole of the PV arrays are not permitted to be grounded. Otherwise the inverter can not work. All non-current carrying exposed metal parts of the equipment and other enclosures in the PV power system should be grounded (e.g., PV arrays and inverter).

  • Page 47: Disconnection Of Inverter

    Electrical Connection Disconnection of Inverter For maintenance work and repairs, the inverter must be switched off. In order to disconnect the inverter from the AC and DC power sources, you should proceed with the following procedures. Otherwise you will be exposed to lethal voltages or the inverter will be damaged.

  • Page 48: Connecting Communication Cable

    SG1K5TL-31 User Manual Connecting Communication Cable 5.9.1 Monitoring System The inverter provides RS485 interface to communicate with remote PC or logger. User can monitor the inverter’s state via the following types of communication systems. Through RS485 interface-Data logger Inverter Data logger...

  • Page 49: Connecting Rs485 Cable

    RS485 bus’ requirements to ensure quality of communication: Shielding twist-pair type Shielding layer of RS485 bus should be single-point grounding SolarInfo logger and RS485-232 converter are optional parts and can be ordered from Sungrow. Data logger Inverter 1 Inverter 2...
  • Page 50 SG1K5TL-31 User Manual Step 5: Connect RS485 cables of the last inverter to A1 and B1 port of SolarInfo logger. Data logger+ PC Step 1: A 120Ω resistance is connected between RS485 A and RS485 B of the first inverter.

  • Page 51: Commissioning

    Commissioning About This Chapter This chapter demonstrates how to check before commissioning and operation procedures.

  • Page 52: Verify Before Commissioning

    SG1K5TL-31 User Manual Verify before Commissioning Item Remark Verify whether inverter is fastened onto the wall. See “4 Installing Inverter onto Wall”. Check whether all cables are undamaged, See” 5.3 Specifications of Cables”. properly insulated and adequately dimensioned. Check whether all cables are firmly attached and See “5.5 Connecting Inverter to PV...

  • Page 53: Troubleshooting

    Troubleshooting About This Chapter This chapter illustrates troubleshooting of LED indicator and malfunction displayed in LCD screen.

  • Page 54: Troubleshooting Of Led Indicator

    Electrical Connection”. 4. Check whether the voltage of DC input exceeds start-up voltage of inverter. 5. If all above conditions are OK, please contact with Sungrow. “Fault” indicator is lit 1. There is a fault which is not removed yet.

  • Page 55: Troubleshooting Of Faults In Lcd Screen

    5. Rotate the DC switch to the “ON” position 6. Close AC circuit breaker to restart the inverter. 7. If the fault can not be solved, please contact with Sungrow. PM-fault If this malfunction occurs, the reasons are very complicated.
  • Page 56 2. Check whether AC cables are all firmly connected. 3. Check whether grid is cut off. 4. If all conditions are OK and this malfunction still occurs in the LCD screen, please contact with Sungrow. Temp-flt 1. Check whether AC output power exceeds rated power too much.

  • Page 57: Operation Information

    OPERATION INFORMATION  FOR INSTALLER AND USER...

  • Page 59: Operation Of Lcd Menu

    Operation of LCD Menu About This Chapter This chapter shows operation of LCD menu via buttons to check the records in the inverter and configure the parameters of the inverter.

  • Page 60: Description Of Button Function

    SG1K5TL-31 User Manual Description of Button Function Inverter offers two buttons to look up running information and configure parameters. Users should know the button functions before any operation onto inverter. Table 8-1 Description of Button Function Name Operation Description Press less than two Move cursor upwards and downwards in the screen “...

  • Page 61: Overview Of Lcd Menu

    Operation of LCD Menu Overview of LCD Menu 中 间 器 件 Fig 8-1 Menu Tree-English...

  • Page 62: Contrast Adjustment

    SG1K5TL-31 User Manual Contrast Adjustment 1. Long press “ ” to enter into the “Contrast-adj” menu from the default menu. 2. Short press “ ” to decrease the setting value and short press “ ” to increase the contrast value.
  • Page 63 Operation of LCD Menu User can also view inverter running information via “Current-inform” menu. 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Run-inform” and long press button “ ” to confirm the selection.

  • Page 64: Total Information

    SG1K5TL-31 User Manual Total Information 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Run-inform” and long press button “ ” to confirm the selection. 3. Short press button “...

  • Page 65: Fault Record

    PM fault occurs. Temp-flt Temperature inside the inverter is too high. Inverter SG1K5TL-31 an store at most 20 fault records. The latest fault record number is always 01. The oldest fault record number is always 20(suppose there are 20 fault records).

  • Page 66: Parameters Configuration

    SG1K5TL-31 User Manual Parameters Configuration If you want to set inverter’s parameters, you have to input correct password. The default password is 1111. There are system parameters, running parameters and communication parameters that users can set. System parameters include language, time, power-adj, load default, firmware version.

  • Page 67: Time Settings

    Operation of LCD Menu 6. Short press button “ ” to select the chosen language. 8.8.2 Time Settings If there is deviation between the time in the default screen and your local time, you should perform the operation “set time”. Where clock set is not 24-hour format, setting is not valid.

  • Page 68: Deviation Of Energy Settings

    SG1K5TL-31 User Manual 8.8.3 Deviation of Energy Settings If the accumulative value of “E-tot” by inverter has deviation from the value in the external metering device, you should adjust the parameter “power-adj”. 1. Long press button “ ” to enter into sub-screen.

  • Page 69: Load Default

    Operation of LCD Menu 8.8.4 Load Default If you perform the operation “Load default”, all running information recorded will unrecoverable cleared and all parameters will return to the default value except protective parameters and time. 1. Long press button “ ”...

  • Page 70: Firmware Version

    SG1K5TL-31 User Manual 8.8.5 Firmware Version User can not set this parameter. 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Set-param” and long press button “ ” to confirm the selection.

  • Page 71: Protective Parameters Settings

    Operation of LCD Menu 8.8.6 Protective Parameters Settings 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Set-param” and long press button “ ” to confirm the selection. 3. Short press “ ”...

  • Page 72: Communication Parameters Settings

    SG1K5TL-31 User Manual 8.8.7 Communication Parameters Settings 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Set-param” and long press button “ ” to confirm the selection. 3. Short press “...

  • Page 73: Inverter Start And Stop

    Operation of LCD Menu Inverter Start and Stop 1. Long press button “ ” to enter into sub-screen. 2. Short press button “ ” to select icon “Set-param” and long press button “ ” to confirm the selection. ESC/ 3. Short press “ ”...
  • Page 74 SG1K5TL-31 User Manual...

  • Page 75: Appendix

    APPENDIX  Technical Data Technical Specifications SG1K5TL-31 DC Side Data Max. DC Power 1600W Max. Input Current MPP Voltage Range 150~380V Max. DC Voltage 450V Min. DC Voltage 150V Start Voltage 170V AC Side Data Nominal AC Power 1500W Max. AC Output Current...
  • Page 76 Power Consumption at Night Operating Temperature -25℃～+60℃ Cooling Method Natural cooling Relative Humidity 0~95%, non-condensing Max. Working Altitude 2000m DC Switch Optional Technical Specifications SG1K5TL-31 Mechanical Data Dimensions(W x H x D) 318*460*151mm Weight 14kg Display and Communication Display Communication(Standard) RS485 Communication(Optional) Ethernet...

  • Page 77: Exclusion Of Liability

    In case of unforeseen calamity or force majeure The use of supplied software produced by Sungrow Power Supply Co., Ltd. is subject to the following conditions: Sungrow Power Supply Co., Ltd. rejects any liability for direct or indirect damages arising from the use of the SolarInfo software.

  • Page 78: About Us

    The power rating of Sungrow products covers from several hundred watt to large mega-watt systems. The pursuit of Sungrow is to help our customers acquire stable and clean power with minimum cost, maximum reliability and enhanced safety.
  • Page 79 Sungrow Power Supply Co., Ltd. Add: No.2 Tianhu Rd., New & High Technology Industrial Web: www.sungrowpower.com Development Zone, Hefei, P.R.China. E-mail: info@sungrow.cn Contact: Mr. Henry (Director of International Trade) Tel: +86 551 532 7834/532 7845 Zip: 230088 Fax: +86 551 532 7856...

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