SUNFLX SEI-8K-SP User Manual
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SUNFLX SEI-8K-SP User Manual

Solar hybrid inverter
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USER MANUAL
Solar Hybrid Inverter
SEI-8K-SP
SEI-10K-SP
SEI-12K-SP
V1.1

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Summary of Contents for SUNFLX SEI-8K-SP

  • Page 1 USER MANUAL Solar Hybrid Inverter SEI-8K-SP SEI-10K-SP SEI-12K-SP V1.1...

  • Page 2: Table Of Contents

    Table of Contents 1. Safety .............................. 4 1.1、 How to use this manual ..........................4 1.2、Symbols in this manual ..........................4 1.3、Safety instructions ............................4 2. Production Instructions ....................... 5 2.1、Instructions ................................. 5 2.2、Features ................................5 2.3、System connection diagram ........................6 2.4、Production Overview ............................7 2.5、Dimension drawing ............................
  • Page 3 6.1、Overview ................................40 6.2、USB-B port ...............................40 6.3、WIFI port ................................41 6.4、CAN port ................................42 6.5、RS485 port ................................42 6.6 、External CT port .............................43 6.7、Dry contact ............................... 44 7. Fault and Remedy ........................45 7.1、Fault code ................................. 45 7.2、Troubleshooting .............................48 8. Protection and Maintenance ....................50 8.1、Protection features ............................50 8.2、Maintenance ..............................

  • Page 4: Safety

    1. Safety 1.1、How to use this manual This manual contains important information、guidelines、operation and maintenance for the • following products：SEI-8K-SP, SEI-10K-SP,SEI-12K-SP • The manual must be followed during installation and maintenance. 1.2、Symbols in this manual Symbol Description DANGER indicates a hazardous situations which if not avoided will result in △...

  • Page 5: Production Instructions

    2. Production Instructions 2.1、Instructions SEI-SP series is a new type of solar energy storage inverter control inverter integrating solar energy storage & utility charging and energy storage, AC sine wave output. It adopts DSP control and features high response speed, reliability, and industrial standard through an advanced control algorithm. Solar generation Battery charging Energy consumption...

  • Page 6: System Connection Diagram

    2.3、System connection diagram The diagram below shows the system application scenario of this product. A complete system consists of the following components: • PV modules: converts light energy into DC energy, which can be used to charge the battery via an inverter or directly inverted into AC power to supply the load.

  • Page 7: Production Overview

    2.4、Production Overview LED Indicators RS485 port LCD screen CAN port Touchable key External CT port PV1 terminals Dry contact PV2 terminals Parallel communication B port Generator terminals Parallel communication A port （L+N) Load terminals Battery terminal （L+N) Utility terminals PV circuit breaker （L+N) USB-B port ON/OFF rocker switch...

  • Page 8: Dimension Drawing

    2.5、Dimension drawing...

  • Page 9: Installation

    3. Installation 3.1、Select the mount location SEI-SP series can be used outdoors (protection class IP65). Please consider the followings before selecting the location： • Choose the solid wall to install the inverter. • Mount the inverter at eye level. • Adequate heat dissipation space must be provided for the inverter.

  • Page 10: Mount The Inverter

    3.2、Mount the inverter Punch 4 mounting holes in the wall with an electric drill according to the specified size, and insert 4 M8*60 expansion screws above. 3.3、Remove the terminal cover & anti insect net Using a screwdriver, remove the terminal protection cover and anti-insect net. Terminal cover ○...

  • Page 11: Connection

    4. Connection 4.1、Single-phase output AC output Items Description Applicable Model SEI-SP series S model Output Voltage Range (L-N) 200～240Vac, 230Vac default ○ NOTICE • Users can change the output phase mode and output voltage by setup menu. Please read the chapter 5.2 Setting.

  • Page 13: Cable & Circuit Breaker Requirement

    4.2、Cable & circuit breaker requirement PV INPUT • Model Cable Diameter Max. PV Input Current Circuit Breaker Spec SEI-8K-SP 5mm²/ 10 AWG 2P-25A SEI-10K-SP 5mm²/ 10 AWG 2P-25A SEI-12K-SP 5mm²/ 10 AWG 2P-25A AC INPUT • Model Cable diameter Max input current...
  • Page 14 • PV INPUT、AC INPUT、AC OUTPUT Use a stripper to remove the 6~8mm insulation of the cable. Fixing a ferrule at the end of the cable. (ferrule needs to be prepared by the user) • BATTERY 1. Use a stripper to remove the 6~8mm insulation of the cable 2.

  • Page 15: Grid & Load & Gen Connection

    4.3、GRID & LOAD & GEN connection Connect the live,neutral and ground wires according to the cables’ position and order shown in the diagram below. DANGER △ Before connecting AC inputs and outputs, the circuit breaker must be opened to avoid •...

  • Page 16: Pv Connection

    △ DANGER • Before connecting battery, the circuit breaker must be opened to avoid the risk of electric shock and must not be operated with electricity. • Make sure that the positive and negative terminals of the battery are connected correctly and not reversed, otherwise the inverter may be damaged.

  • Page 17: Dry Contact Connection

    4.6、Dry contact connection Use a small screwdriver to push back the direction indicated by the arrow, then insert the communication cable into the dry junction port. (Communication cable diameter 0.2~1.5mm²) 4.7、Grounding connection Please make sure the grounding terminal connect to the Grounding Bar. •...

  • Page 18: Final Assembly

    4.8、Final assembly After ensuring that the wiring is reliable and the wire sequence is correct, install the terminal protection cover in place. • Step 1 : Close the circuit breaker of the battery. • Step 2：Press the rocker switch on the bottom of inverter, the screen and indicators light up to indicate that the inverter has been activated.

  • Page 19: Schematic Diagram Of Parallel Connection In Single Phase

    wiring, please refer to 2.4.3 Wiring Diagram. Parallel connection in three-phase: ensure N-to-N and PE-to-PE connection for all solar storage inverters. The L lines of all inverters connected to the same phase need to be connected together. But L lines of different phases cannot be joined together.
  • Page 20 2. In case of parallel operation with multiple inverters, the schematic diagram of parallel connection is as follows: a） Two units connected in parallel: b） Three units connected in parallel:...
  • Page 21 c） Four units connected in parallel: d） Five units connected in parallel: e） Six units connected in parallel:...

  • Page 22: Schematic Diagram Of Parallel Connection In Three Phase

    4.9.4 Schematic diagram of parallel connection in three phase The parallel communication line and current sharing detection line of the solar storage inverter need to be locked with screws after connecting. The schematic diagram is as follows: In case of parallel operation with multiple inverters, the schematic diagram of parallel connection is as follows: Parallel Operation in three phase : a）...
  • Page 23 b） Four units connected in three phase: 2+1+1 system: c） Five units connected in three phase: 3+1+1 system:...
  • Page 24 2+2+1 system: d） Six units connected in three phase: 2+2+2 system:...
  • Page 25 3+2+1 system: 4+1+1 system:...
  • Page 26 Note: 1) Before starting up and running, please check whether the connection was correct to avoid any abnormalities in the system. 2) All wiring must be fixed and reliable to avoid wire drop during use. 3) When the AC output is wired to the load, it shall be properly wired according to the requirements of the electrical load equipment to avoid damage to the load equipment.

  • Page 27: Operation

    5. Operation 5.1、Operation and display panel The operation and display panel below includes 1 LCD screen, 3 indicators, 4 touchable keys. Keys • Keys Description To enter/exit the setting menu To next selection To last selection To confirm/enter the selection in setting menu LED Indicators •...
  • Page 28 Display panel • Icon Description Description Icon Solar panel Load Battery Grid or Generator Inverter is Home page Working History data Setting Local time The buzzer is slient BMS communicate status The enery direction...
  • Page 29 • View real-time data On the LCD home screen, click the inverter icon, battery icon, mains icon, load icon and photovoltaic icon to view the real-time data of the machine. System data Item Item MPPT temperature ℃ Device information Inverter temperature ℃ DC-DC board temperature ℃...

  • Page 30: Setting

    5.2、Setting Operating Instructions：tap settings in the menu bar at the bottom of the screen to enter the settings interface, including Basic setup, Work mode setup, Battery setup On grid setup and Advance setup. Parameter settings: Parameter Meaning Options Description Basic setup System date This item shows the inverter date, click on it to set the date System time...
  • Page 31 PV priority: switch to utility power when PV is invalid or when Solar first the battery is below the parameter”Turn To Inverter Volt” or ”Switching to utility SOC”. setting. Solar and utility charging the battery at the same time, solar at the first priority, utility power as a supplement when solar Hybrid default power is not sufficient.
  • Page 32 2nd slot end charging 00:00:00 Setting range: 00:00:00-23:59:00 3rd slot start charging 00:00:00 Setting range: 00:00:00-23:59:00 3rd slot end charging 00:00:00 Setting range: 00:00:00-23:59:00 Disable default Disable this function After the time-slot discharge function is enabled, the power Timed start discharging supply mode will change to AC 1ST and the system will switch enable Enable...
  • Page 33 Inverter stops charging when the battery is full. Inverter Batt. Recharging voltage 52V default resumes charging when the battery voltage below this value. Setting range: 44V~54V. Disable default Disable the battery temp compensation Batt Chg Temp Compensation Enable Enable the battery temp compensation RS485 port for PC or telecommunication control 485 default BMS comm.
  • Page 34 When output source priority is Solar first or battery first, Turn To Inverter Volt 56.8V default output source will switch to battery from utility when the battery voltage above the preset value. Range:40~60V Switch to utility power when the battery SOC is less than this Battery SOC to line setting Switches to inverter output mode when SOC is greater than...

  • Page 35: Output Priority

    5.3、Output priority • AC First Output Utility at first priority, utility and solar provide power to load at the same time when solar is available, battery will provide power to load only when utility power is not available.(Priority: utility>solar>battery) • Solar and Grid Hybrid Output In UTI mode, when not connected to the battery or when the battery is full, the solar and the utility supply power to the load at the same time.(Priority: solar>utility>battery) •...

  • Page 36: Battery Charging Mode

    5.4、Battery charging mode The charging mode corresponds to the parameter Battery Charging Mode, allowing the user to set the charging mode manually. • Hybrid Charging PV and mains charge the battery at the same time, with PV taking priority and mains acting as a supplement when PV is insufficient.

  • Page 37: Time-Slot Charging/Discharging Function

    5.5、Time-slot charging/discharging function The SEI-SP series is equipped with a time-slot charging and discharging function, which allows users to set different charging and discharging periods according to the local peak and valley tariffs, so that the utility power and PV energy can be used rationally. When mains electricity is expensive, the battery inverter is used to carry the load;...

  • Page 38: Battery Parameter

    5.6、Battery parameter Lead-acid battery • Battery type Sealed lead Gel lead Flooded lead User-defined acid battery acid battery acid battery Adjustable (USE) Parameters (SLD) (GEL) (FLD) Overvoltage disconnection voltage Battery fully charged √ recovery point Boost charge voltage 40～60V √ Undervoltage alarm 40～60V √...
  • Page 39 Li-ion batter • Battery type Ternary Ternary LFP (L16) Adjustable (N13) (N14) (L15) (L14) Parameters Overvoltage disconnection voltage Battery fully charged 50.4V 54.8V 53.6V 50.4V 47.6V √ recovery point Equalizing charge √ voltage Boost charge voltage 53.2V 57.6V 56.8V 53.2V 49.2V √...

  • Page 40: Communication

    6. Communication 6.1、Overview USB-B port CAN port WIFI port External CT port RS485 port Dry contact 6.2、USB-B port USB typeB USB2.0 printer cable The user can read and modify device parameters through this port by using the host software. Please contact us for the host software installation package if you require one.

  • Page 41: Wifi Port

    6.3、WIFI port The RS485-1 port is used to connect to the Wi-Fi/GPRS data acquisition module, which allows the user to view the operating status and parameters of the inverter via the mobile phone APP. RJ45 Definition Pin 1 Pin 2 Pin 3 Pin 4 Pin 5...

  • Page 42: Can Port

    6.4、CAN port RJ45 Definition Pin 1 The CAN port is used to connect to the BMS of Liion battery . Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 CANH Pin 8 CANL 6.5、RS485 port RJ45 Definition The RS485 port is used to connect to the Pin 1 BMS of Liion battery.

  • Page 43: External Ct Port

    6.6 、External CT port RJ45 Definition For external CT model connection Pin 1 CT3+ Pin 2 CT3- Pin 3 Pin 4 CT2+ Pin 5 CT2- Pin 6 Pin 7 CT1+ Pin 8 CT1- 1. Split Core Current Transformer (CT) dimension: (mm) 2.

  • Page 44: Dry Contact

    6.7、Dry contact Dry contact port with 4 functions: RSD power supply Temperature sampling (reserved) 3. Generator remote start/stop Function Description RSD power supply PIN 1 is GND，PIN 2 is RSD 12V+ Temperature sampling Pin 1 & Pin 5 can be used for battery temperature sampling compensation. （reserved）...

  • Page 45: Fault And Remedy

    7. Fault and Remedy 7.1、Fault code Whether it affects the Fault code Fault name Description output or 【01】 BatVoltLow Battery undervoltage alarm. Battery discharge average current 【02】 BatOverCurrSw overcurrent (software protection). 【03】 BatOpen Battery not-connected alarm. Battery undervoltage stop discharge 【04】...
  • Page 46 【21】 FanFail Fan blockage or failure fault. 【22】 EEPROM Memory failure. 【23】 ModelNumErr Model setting error. Inverted AC Output Backfills to Bypass AC 【26】 RlyShort Input. 【29】 BusVoltLow Internal battery boost circuit failure. Alarm given when battery capacity rate is 【30】...
  • Page 47 【49】 Grid over voltage 【50】 Grid under voltage 【51】 Grid over frequency selects the local corresponding grid 【52】 Grid under frequency standard. 【53】 Grid loss 【54】 Grid DC current over 【55】 Grid standard un init Low insulation PV1+, PV2+ and PV- abnormally low 【56】...

  • Page 48: Troubleshooting

    7.2、Troubleshooting Fault Faults Remedy code Check if the battery switch or PV switch is closed; whether the switch is in the "ON" state; press any Display No display on the screen button on the screen to exit the screen sleep mode.
  • Page 49 Inconsistent AC input Check whether the parallel AC inputs are from the 【39】 source in parallel mode same input interface. Inconsistent system Check whether the software version of each 【42】 firmware version in parallel inverter is consistent. mode 【44】 Serial number error Incorrect device serial number setting.

  • Page 50: Protection And Maintenance

    8. Protection and Maintenance 8.1、Protection features Protection Feature Instruction When the charging current or power of the PV array configured PV input current/power exceeds the PV input rated value, the inverter will limit the input limiting protection power and charge at the rated. If the PV voltage exceeds the maximum value allowed by the PV input over-voltage hardware, the machine will report a fault and stop the PV boost to...
  • Page 51 Load > 125% : alarm reported and output switched off after 5s. Prevents AC back flow from the battery inverter to the bypass AC AC output reverse input. Bypass over-current Built-in AC input over-current protection circuit breaker. protection When the phase of the bypass input and the phase of the inverter Bypass phase split do not match, the inverter disables switching to the bypass inconsistency...

  • Page 52: Maintenance

    8.2、Maintenance To maintain optimum and long-lasting working performance, we recommend that the following items are checked twice a year. Ensure that the airflow around the inverter is not blocked and remove any dirt or debris from the radiator. Check that all exposed conductors are not damaged by sunlight, friction with other surrounding objects, dry rot, insect or rodent damage, etc.

  • Page 53: Datasheet

    9. Datasheet MODEL SEI-8K-SP SEI-10K-SP SEI-12K-SP Settable Inverter output Rated Output Power 8800W 10,000W 12000W Max. Peak Power 17,600VA 20,000VA 24,000VA Rated Output Voltage 230Vac（Single phase）（200/208/220/240Vac settable） Output voltage error ±5% Load Capacity of Motors Rated AC Frequency 50/60Hz ± 0.3Hz...
  • Page 54 MPPT Voltage Range 125-425Vdc Grid / Generator input Input Voltage Range 90-280Vac Frequency Range 50/60Hz Max.bypass AC current Efficiency MPPT Tracking Efficiency 99.9% Max Efficiency 97.5% European Efficiency Protection PV Input Lightning Protection Anti-islanding Protection PV String Input Reverse Polarity Protection Insulation Resistor Detection Residual Current Monitoring Unit...

This manual is also suitable for:

Sei-10k-spSei-12k-sp

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