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Axpert MKS III - User Manual

Axpert MKS III
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5KW with MPPT Solar Charger
Inverter/Charger
Version: 1.2
User Manual

Table of Contents

Questions and Answers

  • C
    Carla TorresAug 5, 2025
    Why does my Axpert MKS III Inverter work in battery mode when mains are available?
    • S
      Sara BentonAug 5, 2025
      If your Axpert Inverter continues to operate in battery mode even when mains power is available, the issue might stem from a tripped input protector. Verify that the AC breaker hasn't tripped and that all AC wiring connections are secure. Alternatively, the AC power quality may be insufficient, particularly when using shore power or a generator. Ensure that AC wires are adequately thick and not excessively long. If using a generator, confirm it's functioning correctly and that the input voltage range setting on your UPS appliance is accurate.
  • B
    Brian DominguezAug 15, 2025
    What to do if my Axpert MKS III has no response after power on?
    • A
      Annette EllisAug 15, 2025
      If your Axpert Inverter doesn't respond after you power it on, it could be due to critically low battery voltage (below 1.4V/Cell) or reversed battery polarity. First, carefully inspect the battery connections and wiring to ensure they are correctly and securely connected. Then, try to recharge the battery. If the issue persists, the battery may be beyond recovery and need replacement.
  • A
    Alexander JacksonAug 25, 2025
    Why does my Axpert MKS III shut down automatically during startup?
    • M
      mariataylorAug 26, 2025
      If your Axpert Inverter unit shuts down automatically during the startup process, this could be due to low battery voltage (less than 1.91V/Cell). You can try to recharge the battery. If the problem persists, consider replacing the battery, as it may no longer hold sufficient charge.

Summary

INTRODUCTION

Product Overview

Overview of the inverter's front panel components and indicators.

INSTALLATION

Mounting the Unit

Guidelines for selecting an installation location, ensuring proper ventilation and accessibility.

Battery Connection

Detailed steps and specifications for connecting the battery to the inverter.

AC Input;Output Connection

Procedures for connecting AC input and output wires, including safety precautions.

PV Connection

Instructions for connecting photovoltaic (PV) modules to the inverter, including safety warnings.

OPERATION

Operation and Display Panel

Explanation of the inverter's front panel, including indicators, keys, and LCD display.

LCD Setting

Guide to configuring inverter settings via the LCD menu for various functions.

BATTERY EQUALIZATION

How to Apply Equalization Function

Steps to enable and apply battery equalization through the LCD settings.

Faults Reference Code

A list of fault codes, their corresponding events, and icons displayed on the inverter.

SPECIFICATIONS

Table 1 Line Mode Specifications

Technical specifications for the inverter when operating in line mode.

Table 2 Inverter Mode Specifications

Technical specifications for the inverter when operating in inverter mode.

TROUBLE SHOOTING

Fault Code

Detailed descriptions and solutions for various fault codes encountered with the inverter.

Appendix I: Parallel function

Wiring Connection

Guidelines for connecting batteries and AC input/output for parallel operation.

Commissioning

Steps for commissioning the inverter system in single phase and three-phase parallel configurations.

Appendix II: BMS Communication Installation

Lithium Battery Communication Configuration

Configuration steps for communicating with Pylontech, WECO, Soltaro, and BAK lithium batteries.

Appendix III: Approximate Back-up Time Table

Axpert MKS III Specifications

General IconGeneral
BrandAxpert
ModelMKS III
CategoryInverter
LanguageEnglish

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