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

Pv grid-tied inverter
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PV Grid-tied Inverter
SPI-B Series (75K-150K)
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  • Page 1 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual...
  • Page 3 Copyright © Kehua Data Co., Ltd. 2021.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 Kehua Data Co., Ltd. Trademarks and Permissions and other Kehua trademarks are trademarks of Kehua Data Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
  • Page 4 PV Grid-tied Inverter SPI-B Series (75K-150K) 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 Series (75K-150K) User Manual Foreword Symbol Description Alerts you to a medium low risk hazard that could, if not avoided, result in moderate or minor injury. Alerts you to a low risk hazard that could, if not avoided, result in minor injury.

  • Page 6: Table Of Contents

    PV Grid-tied Inverter SPI-B Series (75K-150K) 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 ..........................3 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 Series (75K-150K) User Manual Contents 2.4.3 PLC Communication (Optional) ......................14 2.5 PID Function (Optional) ..........................16 3 Installation............................ 18 3.1 Installation Process ............................18 3.2 Installation Tools ............................19 3.3 Selection of Installation Site .......................... 20 3.3.1 Installation Environment ........................
  • Page 8 PV Grid-tied Inverter SPI-B Series (75K-150K) Contents User Manual 5 Maintenance and Troubleshooting ..................53 5.1 Maintenance ..............................53 5.1.1 Maintenance Details and Period ......................53 5.1.2 Maintenance Guide ..........................54 5.2 Troubleshooting .............................. 56 6 Stop Running, Dismantle, Discard Inverter ................59 6.1 Stop Running ..............................

  • Page 9: Safety Description

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 1 Safety Description 1 Safety Description This chapter mainly describes 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 Grid-tied Inverter SPI-B Series (75K-150K) 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: Pv String Protection

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 1 Safety Description 1.1.2 PV String Protection When install PV string in daytime, it necessary to cover the PV string by light-proof material, or the PV string will generate high voltage under sunshine. If touching PV string accidently, it may cause...

  • Page 12: Moistureproof Protection

    PV Grid-tied Inverter SPI-B Series (75K-150K) 1 Safety Description User Manual 1.1.5 Moistureproof Protection Moisture invasion may cause inverter damage! Observe the following items to ensure the inverter works normally. ⚫ When the air humidity is more than 95%, don't open the door of the inverter;...

  • Page 13: Measurement Under Operation

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 1 Safety Description 1.1.8 Measurement Under Operation There exists high voltage in the device. If touching device accidently, it may cause electric shock. So, when perform measurement under operation, it must take protection measure (such as wear insulated gloves, etc.)

  • Page 14: Overview

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual 2 Overview This chapter mainly describes product appearance, structure, working principle and communication method, 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 large power station grid-tied system.

  • Page 15: Features

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview Transformer Inverter Figure2-2 Grid form 2.1.1 Features ⚫ 1100V high voltage input, increasing efficiency and cost reduction. ⚫ Full voltage adaptation, strong grid support, and adaptability to complex power grid.

  • Page 16: Model Meaning

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual 2.1.2 Model Meaning The model description of SPI75K-B, SPI80K-B, SPI90K-B,SPI100K-B,SPI110K-B,SPI125K-B is as shown in Figure2-3. Isolation type mark “B”represents non-isolated power. Rated output power mark When it is 80, that means the rated power of the UPS is 80kVA;...

  • Page 17: Operation Panel

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview Figure2-5 Appearance 2.2.2 Operation Panel There are 5 status indicators on the front panel of the inverter, which can indicate the current working status of the inverter. The status of each indicator is shown in Table2-1.

  • Page 18: Bottom Layout

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual Mark Color Meaning Status illustration ON: WIFI/ GPRS has been connected. ○ Green WIFI/GPRS indicator OFF: WIFI/ GPRS has been disconnected. ○ Fault indicator ON: The inverter has alarm. ON: Bluetooth has been connected with APP.
  • Page 19 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview Table2-2 Mark description Mark Name Remarks ○ B+/B- Energy storage (reserved) Used to connect battery input. It is the connection switch between inverter and PV string. Each DC ○ DC SWITCH...

  • Page 20: Size

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual ⚫ When checking and repairing, place the DC switch to OFF position and wait for 30 minutes. Do not perform the maintenance until the DC bus voltage inside the inverter lower than 10V and check that there is no voltage and current in the inverter by the detection equipment.

  • Page 21: Rs485 Communication

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview 2.4.1 RS485 Communication RS485 communication (the interface is shown in Figure2-10) is mainly used for local area network monitoring, which can realize the background remote monitoring. Figure2-10 RS485 communication interface position ……...

  • Page 22: Plc Communication (Optional)

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual Smart phone Inverter （include GPRS） Internet Router Inverter （include WIFI） Computer monitor Figure2-12 WIFI/GPRS monitoring solution The APP can build communication between WIFI or GPRS wireless communication module and inverter. Via APP, the near-end and far-end maintenance and monitor of the inverter can come ture.
  • Page 23 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview Isolation Inverter 1 Grid transformer Sub-array Fiber Inverter 2 controller Inverter N Figure2-14 PLC communication connection The setting of PLC communication address is the same as that of RS485,details please see 3.6.8 Communication Connection.

  • Page 24: Pid Function (Optional)

    PV Grid-tied Inverter SPI-B Series (75K-150K) 2 Overview User Manual Monitor platform Data collector Data Data collector collector Data collector Smart Data sub-array collector controller Environment Box-type Inverter monitoring transformer instrument Figure2-15 Network application scheme of smart sub-array controller 2.5 PID Function (Optional) If PID function is configured and enabled, the voltage of all PV string to ground is greater than zero, that is to say, the voltage of all PV string to ground is positive voltage status.
  • Page 25 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 2 Overview PID repair function When the inverter not running, the PID function module add reverse voltage for PV string to repair the PV string which has occurred the PID effect. After enable PID repair function, it only works at night. After enable PID repair function, the default voltage of PV string to ground 500Vdc.

  • Page 26: Installation

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual 3 Installation This chapter mainly introduces the inverter's installation, including installation process, installation preparation, handling, unpacking and checking, installation procedures, electrical connection. check the installation, etc. 3.1 Installation Process The installation process of the inverter is as shown in Figure3-1.

  • Page 27: Installation Tools

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation 3.2 Installation Tools The recommended installation tools include but not limited to the following tools, if necessary, you can also use other auxiliary tools according to the site conditions. Tools Ltd.

  • Page 28: Selection Of Installation Site

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Tools The installation tools need to be insulated to avoid electric shock. ⚫ Multimeter range≥1500Vdc. ⚫ Wrench specification:T30. 3.3 Selection of Installation Site 3.3.1 Installation Environment The use environment has a certain influence on the service life and reliability of the inverter.

  • Page 29: Installation Clearance

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-2 Installation environment requirements ⚫ As the operation of inverter will produce noise pollution, avoid installing them near residential areas as far as possible. Choose the best installation location for the inverter, which plays a very important role in its safe operation, service life, performance guarantee, etc.
  • Page 30 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-4 Installation clearance The installation height of the inverter should be easy to check the status of the indicators, connect wires, operate and maintain, etc. The recommended space between bottom inverter and ground is 600~800mm.

  • Page 31: Requirements For Installation Carrier

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-6 Back-to-back installation space requirements (unit: mm) 3.3.3 Requirements for Installation Carrier The installation carrier of the inverter (such as walls and brackets) should meet the requirements shown in Figure3-7.

  • Page 32: Transporting, Unpacking And Checking

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-8 Illustration of installation method Because the inverter is downward air inlet and the upper air outlet, in order to ensure the normal operation of the inverter, it is not recommended to install it horizontally.
  • Page 33 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation The handle is an accessory. When transporting, they need to be installed to corresponding position and tightened. It is recommended that carry the inverter by at least 4 people and wear protective equipment such as smash-proof shoes and gloves.

  • Page 34: Unpacking And Checking

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual While hoisting, keep balance and avoid collision with walls or other objects. In case of severe weather conditions, such as heavy rain, heavy fog, strong wind, etc., the hoisting operation should be stopped.
  • Page 35 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-11 Assemble installation holder Step 2 Place the assembled installation holder onto the installation site, use a horizontal ruler to adjust the angle, and mark the position of the hole on the bracket, as shown in Figure3-12.
  • Page 36 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-13 Mounting hole size (unit: mm) Step 3 Use the electric drill to drill holes on the bracket according to the marked position. The drilling size is Φ12mm, as shown in Figure3-14.
  • Page 37 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Step 5 Lift the inverter to the installation holder, make sure that the mounting ears of the inverter and the groove of the installation holder fit well, and then slowly hang the inverter to the installation holder, as shown in Figure3-16.

  • Page 38: Wall Mounting

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual 3.5.2 Wall Mounting Step 1 Use the four M4*10 combination bolts in accessories to fix the installation holder with the joint lever, as shown in Figure3-18. Figure3-18 Assemble installation holder...
  • Page 39 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation You can also directly mark the location of the holes according to the size of the mounting holes (see Figure3-20). Figure3-20 Mounting hole size (unit: mm) Step 3 According to the marked position, use a hammer drill to drill holes on the wall. Drilling hole size is Φ14.5mm, depth range is 55~60mm.
  • Page 40 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-22 Expansion bolt installation diagram Step 5 Install the installation holder. Fix the installation holder to the expansion bolts, put on flat washers, spring washers and nuts, and then tighten the nuts clockwise with a wrench, as shown in Figure3-23.

  • Page 41: Electrical Connection

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-24 Hang the inverter onto the installation holder After confirming that the inverter is fixed firmly, the operator can release the equipment. Step 7 Use the screws M5*50 in the accessories to fix the inverter, as shown in Figure3-25.

  • Page 42: Requirements For Wire

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual ⚫ High voltage may exist in the inverter. ⚫ PV string exposed to sunlight will generate dangerous voltage. ⚫ Do not close the DC switches and external AC breaker before completing the electrical connection.

  • Page 43: External Grounding Connection

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Table3-1 Wire and terminal requirements Name Type Recommended wire diameter(mm 1500V and above PV PV string input wire cables Outdoor three-core cable: 70~240 (Max. outer Outdoor multi-core diameter<56mm). L1/L2/L3 cable or single-core Outdoor single--core cable: 70~240 (Max.
  • Page 44 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual ⚫ Since the inverter is with no transformer, it is required that the positive and negative poles of the PV string cannot be grounded, otherwise the inverter will not operate normally.

  • Page 45: Ac Output Wiring

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Two external grounding terminals are reserved at the bottom of the inverter, at least one of them should be connected. In order to improve the anti-corrosion performance of the grounding terminal, it is recommended to paint anti-rust paint on the outside of the grounding terminal for protection after installation.
  • Page 46 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Each inverter should be equipped with an independent external three-pole breaker on the AC side to ensure that the inverter is safely disconnected from the grid. Recommended breaker's rated voltage is 690V, rated current is 250A.
  • Page 47 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation ⚫ The apparent power of inverter cannot exceed the power of the transformer. Considering the max. AC current of all paralleled inverters. ⚫ Considering the bearable ability of the transformer if system faults. The fault includes system short circuit, grounding fault, voltage drop, etc.
  • Page 48 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-30 Open the wiring cover A limiting lever is designed inside the wiring box. After the wiring cover is opened, the limiting lever needs to be fixed (as shown in Figure3-31) to facilitate the wiring operation.
  • Page 49 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-32 Connect the AC output cable The torque used to tighten the external forced cable fixing head of AC wiring is about 15~19N· m. In order to avoid excessive stress on the cable, the AC cable needs to enter the inverter vertically, and the external length of the straight section should be not less than 200mm, as shown in Figure3-33.

  • Page 50: Internal Grounding Connection

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual ⚫ When leaving the factory, outlet end of the cable seal ring is in a sealed status. Before connecting, puncture it by tool. ⚫ Please connect the AC output wire according to the relevant requirements of different countries.

  • Page 51: Pv String Input Wiring

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation 3.6.6 PV String Input Wiring Pay attention to safety before electrical connection, the PV string will produce dangerous voltage when exposed to sunlight. If the DC input wires are reverse connected by accident and the "DC SWITCH" have been set to the "ON", do not immediately operate the "DC SWITCH"...
  • Page 52 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Use the PV connectors and terminals in the accessories for DC input wiring. There are two types of PV connectors: positive and negative connectors, which respectively use positive metal terminals and negative metal terminals.
  • Page 53 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Figure3-37 Fixed metal terminal Step 4 Screw and tighten the locking nuts of the positive and negative connectors to corresponding insulating shells, as shown in Figure3-38. Figure3-38 Tighten the lock nut...
  • Page 54 PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-39 Wiring diagram (connected from inverter side) Figure3-40 Wiring diagram (connected from PV string) Install PV connectors ○ Step 1 Confirm that all DC switches on the inverter (shown as 2 in Figure2-7) are OFF.

  • Page 55: Wifi/Gprs Communication Connection(Optional)

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation Step 2 Check whether the polarity of the PV string is correct, and ensure that the open-circuit voltage in any case not exceeds the maximum input voltage of the inverter 1100V.

  • Page 56: Communication Connection

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-44 WIFI/GPRS communication connection When connecting, pay attention to the limiting position, and don't wrongly insert it. When tightening, do not use excessive force (torque: 1.5~2.0N•m), so as not to damage the interface.
  • Page 57 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 3 Installation ⚫ When connecting, do not press the insulation layer of the communication cable into terminal, otherwise it may cause poor contact. ⚫ The RS485 communication wire must be routed separately from the input and output wires to avoid interference with communication.

  • Page 58: Check The Installation

    PV Grid-tied Inverter SPI-B Series (75K-150K) 3 Installation User Manual Figure3-47 Position of SW3 The communication address of the inverter must not conflict. Step 2 After connecting, tighten the external forced cable fixing head, seal with fireproof mud and install the cover plate.

  • Page 59: Startup And Shutdown

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 4 Startup and Shutdown 4 Startup and Shutdown This chapter mainly introduces how to start and shut down the inverter. 4.1 Check Before Startup Before first startup, please check the following items first.

  • Page 60: Shut Down Inverter

    PV Grid-tied Inverter SPI-B Series (75K-150K) 4 Startup and Shutdown User Manual Step 1 Switch on the DC switches on the inverter and the project site. When the PV string provides enough startup voltage, PV string indicator will be on.

  • Page 61: Maintenance And Troubleshooting

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 5 Maintenance and Troubleshooting 5 Maintenance and Troubleshooting This chapter mainly describes the maintenance and troubleshooting. 5.1 Maintenance If any maintenance service is needed, please contact the after-sale service centre of Kehua Company, otherwise, Kehua Company will not undertake the responsibility and guarantee for the loss caused by self-operation.

  • Page 62: Maintenance Guide

    PV Grid-tied Inverter SPI-B Series (75K-150K) 5 Maintenance and Troubleshooting User Manual Item Check method Maintenance period maintain it in time. Wire Inlet Check if the wire inlet holes are sealed up Every year hole completely, if not, seal them with fireproof mud.
  • Page 63 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 5 Maintenance and Troubleshooting and keep them unblocked. If necessary, a soft brush can be used to clean the wind inlet & outlet holes. Fan maintenance Before maintenance, shut down the inverter and disconnect all power input.

  • Page 64: Troubleshooting

    PV Grid-tied Inverter SPI-B Series (75K-150K) 5 Maintenance and Troubleshooting User Manual Figure5-2 Loosen the wiring of fan module Step 4 Pull out the fan module, clean the fan by brush or cleaner or replace damaged fan. Figure5-3 Pull out fan module Step 5 Install the fan module in reversed order and lock the screws, restart the inverter.
  • Page 65 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 5 Maintenance and Troubleshooting Table5-2 Troubleshooting list Fault information Solution Check whether the safety regulations of the inverter meet the Grid voltage requirements of the local grid connection and check the voltage of the abnormal local power grid.
  • Page 66 PV Grid-tied Inverter SPI-B Series (75K-150K) 5 Maintenance and Troubleshooting User Manual Fault information Solution Check whether the radiator of the inverter is blocked, and check Inner whether the ambient temperature of the inverter is too high or too over-temperature low.

  • Page 67: Stop Running, Dismantle, Discard Inverter

    PV Grid-tied Inverter SPI-B Series (75K-150K) 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 68: Dismantle The Inverter

    PV Grid-tied Inverter SPI-B Series (75K-150K) 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 30min 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 69: Package, Transportation, Storage

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual 7 Package, Transportation, Storage 7 Package, Transportation, Storage This chapter mainly describes the package, transportation and storage. 7.1 Package The package of product is carton. When packing, pay attention to the placing direction requirements.

  • Page 70: A Technical Specifications

    PV Grid-tied Inverter SPI-B Series (75K-150K) A Technical Specifications User Manual Technical Specifications SPI75K-B, SPI80K-B, SPI90K-B, SPI100K-B Parameter SPI75K-B SPI80K-B SPI90K-B SPI100K-B DC input Max. PV input voltage 1100V Min. PV input voltage/start voltage 200V/250V Rated input voltage 585V MPPT voltage range...
  • Page 71 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual A Technical Specifications Parameter SPI75K-B SPI80K-B SPI90K-B SPI100K-B DC input Max. output apparent power 75kVA 88kVA 99kVA 110kVA Rated output current 108.3A 115.5A 129.9A 144.4A Max. output current 108.3A 127A 142.9A 158.8A...
  • Page 72 PV Grid-tied Inverter SPI-B Series (75K-150K) A Technical Specifications User Manual Parameter SPI75K-B SPI80K-B SPI90K-B SPI100K-B DC input Operation humidity range 0~100% Heat dissipation way Smart forced wind-cooling Max. operation altitude 4000m (>3000m decrease rate power) Display LED, Bluetooth +APP...
  • Page 73 PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual A Technical Specifications Parameter SPI110K-B SPI125K-B SPI136K-BHV SPI150K-BHV DC input Rated output power 110kW 125kW 136kW 150kW Max. output power 121kW 137.5kW 149.6kW 165kW Max. output apparent power 121kVA 137.5kVA 149.6kVA 165kVA Rated output current 158.8A...
  • Page 74 PV Grid-tied Inverter SPI-B Series (75K-150K) A Technical Specifications User Manual Parameter SPI110K-B SPI125K-B SPI136K-BHV SPI150K-BHV DC input Protection grade IP66 Self-consumption at night <2W -35℃~+60℃ Operation temperature range Operation humidity range 0~100% Heat dissipation way Smart forced wind-cooling Max. operation altitude 4000m (>3000m decrease rate power)

  • Page 75: B Quality Assurance

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual B Quality Assurance Quality Assurance If the device fault in guarantee period, Kehua Data Co., Ltd. (hereinafter referred to as Kehua Company) will maintenance it free or replace new product. Evidence In guarantee period, user needs to show the purchase invoice of the product, and the trademark on the product must be clearly visible, or, Kehua Company have right to refuse the quality assurance.
  • Page 76 PV Grid-tied Inverter SPI-B Series (75K-150K) B Quality Assurance User Manual ⚫ Damage caused by abnormal nature environment. If the fault is caused by above situation and user requires to maintain it, we can provide paid maintenance service after our service organization decided.

  • Page 77: C Acronyms And Abbreviations

    PV Grid-tied Inverter SPI-B Series (75K-150K) User Manual C Acronyms and Abbreviations Acronyms and Abbreviations Alternating Current Liquid Crystal Display Light-emitting Diode MPPT Maximum Power Point Tracking Protective Earthing Photovoltaic RS485 Recommend Standard485 Ltd. All rights reserved ©Kehua Data Co.,...
  • Page 78 PV Grid-tied Inverter SPI-B Series (75K-150K) C Acronyms and Abbreviations User Manual Universal Serial Bus Ltd. All rights reserved ©Kehua Data Co.,...
  • Page 79 4402-03569 002...

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