KEHUA TECH SPI-B X2 Series User Manual
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KEHUA TECH SPI-B X2 Series User Manual

Pv grid-tied inverter
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SPI-B X2 Series (8K-25K)
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Summary of Contents for KEHUA TECH SPI-B X2 Series

  • Page 1 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual...
  • Page 3 Copyright © Xiamen Kehua Digital Energy Tech Co., Ltd. 2022. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Xiamen Kehua Digital Energy Tech Co., Ltd. Trademarks and Permissions and other Kehua trademarks are the licensed trademarks of Xiamen Kehua Digital Energy Tech Co., Ltd.
  • Page 4 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) Foreword User Manual Foreword Summaries Thank you for choosing the PV grid-tied inverter (hereinafter referred to as inverter)! This document gives a description of the inverter, including appearance, features, working principles, installation, electrical connection, operation, maintenance and storage, etc.
  • Page 5 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual Foreword Symbol Description Alerts you to a high risk hazard that will, if not avoided, result in serious injury or death. Alerts you to a medium low risk hazard that could, if not avoided, result in moderate or minor injury.

  • Page 6: Table Of Contents

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) Contents User Manual Contents 1 Safety Description......................... 1 1.1 Safety Announcements ............................. 1 1.1.1 Use Announcements ..........................1 1.1.2 PV String Protection ..........................2 1.1.3 ESD Protection ............................3 1.1.4 Grounding Requirements ........................3 1.1.5 Moistureproof Protection ........................
  • Page 7 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual Contents 3.2.2 Installation Environment ........................12 3.2.3 Installation Clearance ..........................13 3.2.4 Installation Method ..........................14 3.3 Transportation and Unpacking ........................14 3.3.1 Transportation ............................14 3.3.2 Unpacking and Checking ........................14 3.4 Inverter Installation ............................
  • Page 8 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) Contents User Manual 7.1 Package ................................41 7.2 Transportation ..............................41 7.3 Storage ................................41 A Technical Specifications ......................42 B Acronyms and Abbreviations ....................48 Tech Co., Ltd. All rights reserved ©Xiamen Kehua Digital Energy...

  • Page 9: Safety Description

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 1 Safety Description 1 Safety Description This chapter mainly introduces the safety announcements. Prior to performing any work on the device, please read the user manual carefully, follow the operation and installation instructions and observe all danger, warning and safety information.

  • Page 10: Pv String Protection

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 1 Safety Description User Manual There is no operational part inside the inverter. Please do not open the crust of the inverter by yourself, or it may cause electric shock. The device damage caused by illegal operation is out of the guarantee range.

  • Page 11: Esd Protection

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 1 Safety Description There exists dangerous voltage between the positive and negative of PV string! When installing the device, make sure that the connection between inverter and PV string has been disconnected completely.

  • Page 12: Warning Mark Setting

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 1 Safety Description User Manual  When the air humidity is more than 95%, don't open the door of the inverter.  In the wet or damp weather, don't open the door of the inverter to maintain or repair.

  • Page 13: Operator Requirements

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 1 Safety Description 1.2 Operator Requirements The operation and wiring for inverter should be performed by qualified person, which is to ensure that the electrical connection meets the related standards. The professional technicist must be trained strictly, understand all safety announcements, master correct operations and meet the following requirements: ...

  • Page 14: Overview

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 2 Overview User Manual 2 Overview This chapter mainly introduces product appearance, structure, working principles and grid form, etc. 2.1 Product Intro The inverter converts the DC energy from PV string into AC energy and then feedbacks to power grid, which is suitable for the commercial roof grid-tied system and large power station grid-tied system.

  • Page 15: Model Meaning

    2 Overview For type TT grid, the effective value of neutral and grounding voltage must be less than 20V. 2.1.1 Model Meaning The model meaning of SPI-B X2 series (8K-25K) is as shown in Figure2-3. SPI □K-B X2 Second generation When it is X2P, it means the inverter can be equipped with large current PV string.

  • Page 16: Apperance And Structure

    2 Overview User Manual 2.2 Apperance and Structure The appearance of SPI-B X2 series (8K-25K) is as shown in Figure2-4. Figure2-4 Appearance 2.2.1 LED Indicator The LED indicator on the front panel of inverter shows the inverter status, as shown in Table2-1.

  • Page 17: External Terminal Illustration

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 2 Overview 2.2.2 External Terminal Illustration The external terminals are all located at the bottom of the inverter, including PV input, AC output, DC switch and communication interface, etc. as shown in Figure2-5.

  • Page 18: Working Principle

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 2 Overview User Manual DC Switch ○ The DC switch (as shown in the 2 of Figure2-5) connects inverter with the PV string.  When the inverter works normally, the DC switch must be ON.

  • Page 19: Installation

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation 3 Installation This chapter mainly introduces the inverter's installation, including installation process, installation preparation, transportation and unpacking, installation procedures, electrical connection. check the installation, etc. 3.1 Installation Process Start...

  • Page 20: Installation Environment

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Tools The installation tools need to be insulated to avoid electric shock. 3.2.2 Installation Environment  Do not install the inverter in the place with poor ventilation.  Ensure that there has sufficient fresh-air supply around the inverter.

  • Page 21: Installation Clearance

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation The inverter is rated at IP66. Avoid installing the inverter under sunshine. Installing the inverter under sunshine or rain or snow will affect the inverter lifespan and efficiency. Installing the inverter under shade is best, as shown in Figure3-2.

  • Page 22: Installation Method

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual 3.2.4 Installation Method Figure3-4 Installation method 3.3 Transportation and Unpacking 3.3.1 Transportation The inverter should be transported by trained professional. During transporting, please take care and avoid impacting or dropping.

  • Page 23: Inverter Installation

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation Figure3-5 Packing list 1. There are four PV connectors, the actual configuration in order to prevail in kind. 2. WIFI stick, waterproof RJ45 connector and smart meter are optional, they are provided according to the contract.
  • Page 24 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Figure3-6 Size (unit: mm) Step 2 Mark the position of installation holes on the wall according to the dimensions of the fixing holes of the installation holder (as shown in Figure3-7), and drill three holes of Φ 10.5mm on the wall according to marked position, as shown in Figure3-8.
  • Page 25 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation When installation, please keep the installation holder horizontal and the installation holes aligned. The depth of drilled holes should be within 40mm. Clear the dust and measure the net depth. Ensure that the depth of three holes is the same.
  • Page 26 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Step 5 Uplift the inverter and hang the inverter to the installation holder, as shown in Figure3-11. Do not loosen the inverter until the inverter has been hung in the installation holder completely.

  • Page 27: Electrical Connection

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation 3.5 Electrical Connection 3.5.1 Wire Requirements The wiring terminals are located at the bottom of the inverter, as shown in Figure2-5 and Table2-2 . The recommended wire specification is as shown in Table3-1.
  • Page 28 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Step 1 Strip the insulation layer of the grounding wire by wire stripper,, and crimp it into the equipped round terminal, as shown in Figure3-13. Figure3-13 Crimp the grounding wire (unit: mm)

  • Page 29: Pv String Input Wiring

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation × Inverter Lightning √ Grounding system Figure3-15 The grounding of inverter ----End 3.5.3 PV String Input Wiring When installing, use the equipped DC terminals and PV connectors to avoid inverter damage.
  • Page 30 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Figure3-16 Strip the PV string input wires (unit: mm) It is recommended to use red wires for positive and black wires for negative to avoid wrong connection. If other color wires are used, please confirm the corresponding relationship when crimping each wire to the connector.
  • Page 31 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation Figure3-19 Tighten the lock nut Step 5 Check whether the polarity of the PV string is correct, and ensure that the open-circuit voltage in any case does not exceed the max. input voltage of the inverter.

  • Page 32: Ac Output Wiring

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Figure3-21 Connect PV connectors Figure3-22 PV connector installation method ----End 3.5.4 AC Output Wiring It's forbidden that several inverters share an AC switch. It's forbidden to connect with load between inverter and the AC switch.
  • Page 33 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation Table3-2 Recommended AC switch specification Model Specification SPI8K-B X2 SPI10K-B X2 SPI12K-B X2 SPI15K-B X2 SPI17K-B X2 SPI20K-B X2 SPI23K-B X2 SPI25K-B X2 SPI25K-B X2P During wiring, please pay attention to distinguish the AC live wire, neutral wire and grounding wire.
  • Page 34 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Step 2 Draw the AC output wire through the AC output waterproof cover, crimp them to the tube terminals, and then fasten them to corresponding wiring terminal by screwdriver, as shown in Figure3-24.

  • Page 35: Wifi/4G Communication Connection

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation 3.5.5 WIFI/4G Communication Connection Insert the WIFI (optional) /4G stick to the WIFI/4G interface (as shown in Figure3-26) , user can monitor the inverter running information through WiseSolar+ APP or "Energy Cloud" to realize the internet monitoring, the monitoring scheme is as shown in Figure3-27.

  • Page 36: Com. Communication Connection (Optional)

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual WiseSolar+APP can communicate with inverter through WIFI/4G stick to realize the local and remote maintenance. User can perform the information query, alarm query, event query, parameter setting, etc. of inverter through WiseSolar+ APP.
  • Page 37 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation When the COM. interface set to DRM interface, the PIN7 and PIN8 of inverter’s RJ45 plug cannot connect wires. The PIN7 and PIN8 of external DRM adapter’s RJ45 plug must be short connected together.
  • Page 38 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 3 Installation User Manual Illustration Connect to AC OUTPUT phase-W of the inverter. Connect to grid phase-W. Connect to AC OUTPUT phase-N of the inverter and phase-N of grid. RS485: A Connect to pin7 of the waterproof RJ45 connector.

  • Page 39: Check The Installation

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 3 Installation Figure3-32 Install the COM. interface ----End 3.6 Check the Installation After finishing the installation, check the following items:  Check if the PV string input wire, AC output wire and communication wire are connected rightly.

  • Page 40: Startup And Shutdown

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 4 Startup and Shutdown User Manual 4 Startup and Shutdown This chapter mainly introduces how to start and shut down the inverter. 4.1 Check Before Startup Before starting inverter at the first time, please check the following items.

  • Page 41: Shut Down Inverter

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 4 Startup and Shutdown Step 1 Switch on the DC switches on the inverter and the project site. When the PV string provides enough startup voltage, the inverter will start and the indicator will be on.

  • Page 42: Maintenance And Troubleshooting

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 5 Maintenance and Troubleshooting User Manual 5 Maintenance and Troubleshooting This chapter mainly introduces the maintenance and troubleshooting. 5.1 Maintenance 5.1.1 Inverter Maintenance Do not perform the maintenance until the inverter is powered off for 20 minutes and all power sources are disconnected.

  • Page 43: Fan Maintenance

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 5 Maintenance and Troubleshooting 5.1.2 Fan Maintenance The inverter has build-in fans to cool during operation. If the fan does not work properly, then the inverter does not cool effectively, that the inverter's efficiency may be affected or cause derating.

  • Page 44: Troubleshooting

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 5 Maintenance and Troubleshooting User Manual Step 7 Loosen the screws that fixed the fan and take out fans, as shown in Figure5-3. Figure5-3 Dismantle fan Step 8 Clean the fan with a soft brush or vacuum cleaner; Or replace the damaged fan (wind direction: up).
  • Page 45 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 5 Maintenance and Troubleshooting Fault information Solution abnormal requirements of the local grid connection and check the frequency of the local power grid. If the above is normal, please contact your local agency or service center.
  • Page 46 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 5 Maintenance and Troubleshooting User Manual Fault information Solution over-current please contact your local agency or service center. Branch x reverse Check whether the branch x is connected in reverse, if the above is connected normal, please contact your local agency or service center.

  • Page 47: Stop Running, Dismantle, Discard Inverter

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 6 Stop Running, Dismantle, Discard Inverter 6 Stop Running, Dismantle, Discard Inverter This chapter introduces the dispose way for stop running, dismantling, discarding the inverter. 6.1 Stop Running Normally, the inverter don't need to be shut down, but when maintenance, it is necessary to shut down the inverter.

  • Page 48: Dismantle The Inverter

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) 6 Stop Running, Dismantle, Discard Inverter User Manual 6.2 Dismantle the Inverter After the connection among inverter and grid and PV string is completely disconnected and wait for 20mins at least, ensure that the inner capacitor discharge completely and check that there is no voltage and current in the inverter by the detection equipment, and then the inverter can be dismantled.

  • Page 49: Package, Transportation, Storage

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual 7 Package, Transportation, Storage 7 Package, Transportation, Storage This chapter mainly introduces the package, transportation and storage. 7.1 Package The package of product is carton. When packing, pay attention to the placing direction requirements.

  • Page 50: A Technical Specifications

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) A Technical Specifications User Manual Technical Specifications A.1 SPI-B X2 Series (8K-15K) Model SPI8K-B X2 SPI10K-B X2 SPI12K-B X2 SPI15K-B X2 Item DC input Max. input power (kW) 10.8 13.5 16.2 20.3 Max. input voltage (V)
  • Page 51 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual A Technical Specifications Model SPI8K-B X2 SPI10K-B X2 SPI12K-B X2 SPI15K-B X2 Item Max. output current (A) 12.7 15.9 19.1 23.8 Rated grid frequency (Hz) 50/60 Grid frequency range (Hz) 45-55/55-65 Power factor (rated power) >0.99...
  • Page 52 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) A Technical Specifications User Manual Model SPI8K-B X2 SPI10K-B X2 SPI12K-B X2 SPI15K-B X2 Item Installation method Wall-mounting Isolation method No transformer Degree of protection IP66 Self-consumption at night <1W -35~60℃ (>40℃ derating)
  • Page 53 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual A Technical Specifications SPI17K-B SPI20K-B SPI23K-B SPI25K-B SPI25K-B Model Item MPPT voltage range (V) 180-1100 MPPT voltage with full load (V) 400-850 350-850 400-850 450-850 450-850 Startup voltage (V) No. of MPPTs Strings per MPPT Max.
  • Page 54 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) A Technical Specifications User Manual SPI17K-B SPI20K-B SPI23K-B SPI25K-B SPI25K-B Model Item Europe efficiency 98.0% Protection reverse connection protection ＜2s Islanding protection AC short-circuit protection Residual current protection DC switch Optional Input DC impedance monitor...
  • Page 55 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual A Technical Specifications SPI17K-B SPI20K-B SPI23K-B SPI25K-B SPI25K-B Model Item Communication method RS485, WIFI (optional) ,4G, smart meter (optional), anti-backflow (optional) AC terminal Wiring terminal bars DC terminal MC4 (4 mm...

  • Page 56: B Acronyms And Abbreviations

    PV Grid-tied Inverter SPI-B X2 Series (8K-25K) B Acronyms and Abbreviations User Manual Acronyms and Abbreviations Alternating Current Direct Current Liquid Crystal Display Light-emitting Diode MPPT Maximum Power Point Tracking Protective Earthing Photovoltaic Tech Co., Ltd. All rights reserved ©Xiamen Kehua Digital Energy...
  • Page 57 PV Grid-tied Inverter SPI-B X2 Series (8K-25K) User Manual B Acronyms and Abbreviations RS485 Recommend Standard485 Tech Co., Ltd. All rights reserved ©Xiamen Kehua Digital Energy...
  • Page 58 4402-04048 002...

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