APT Inverex S2400 XP Solar

Questions and Answers

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Christina LeeAug 9, 2025
What to do if APT Inverex S2400 XP Solar Inverter beeps continuously and red LED is on?
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  archerpatriciaAug 9, 2025
  If the APT Inverter's buzzer beeps continuously and the red LED is on, it could be due to several reasons: * Output short circuit: Check the wiring and remove any abnormal loads. * Overload error: Reduce the connected load by switching off some equipment. * Weak battery: Recharge or replace the battery. * High or low output voltage, over-charged battery, or main relay stick: Return the unit to the repair center. * Fan fault: Replace the fan. * High internal temperature: Ensure the unit's airflow isn't blocked and the ambient temperature isn't too high. * High battery voltage: Check if the battery specifications and quantity meet the requirements.
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Kevin LeeAug 16, 2025
Why APT Inverter works in battery mode when mains exist?
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  Gina LongAug 16, 2025
  The APT Inverter might be working in battery mode even when mains are available due to these reasons: * The input protector has tripped: Check if the AC breaker is tripped and the AC wiring is well connected. * Insufficient AC power quality: Inspect if the AC wires are too thin or long. If a generator is used, verify it's working correctly and that the input voltage range setting is correct. * Check output source priority: Change output source priority to Utility first.
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Ryan JordanAug 23, 2025
How to fix shorten backup time of APT Inverex S2400 XP Solar after power failure?
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  Danny PetersenAug 25, 2025
  If the APT Inverter's backup time is shortened after a power failure: * The battery voltage may be too low: Charge the unit for at least 8 hours. * The battery capacity may not be full: Check the battery's date code. If the batteries are too old, replace them.
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kevinibarraAug 30, 2025
What to do if no LED display on APT Inverex S2400 XP Solar Inverter when power is normal?
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  Nicole WestAug 31, 2025
  If there is no LED display on the front panel of the APT Inverter when the utility power is normal: * The battery may not be connected well: Check the external battery cable and terminal to ensure all battery connections to the unit are correct. * The battery may be defective: Replace the batteries.

Summary

Important Safety Warning

General Safety Precautions

General precautions for using the unit, including indoor use, qualified batteries, and ventilation.

Personnel Safety Precautions

Precautions for personnel working with batteries, such as avoiding metal objects and sparks.

Installation and Connection

Mounting the Inverter Unit

Step-by-step guide on how to mount the inverter vertically onto a wall.

Connecting to Utility Power

How to connect the inverter to a wall outlet for charging the battery.

Connecting External Batteries

Detailed steps for connecting external batteries, including polarity and cable requirements.

DC Breaker Installation

Instructions on installing a DC breaker in the positive battery line.

Battery Connection Types

Explains series and parallel connections for multiple batteries.

Connecting to Solar Panels

Guidelines and steps for connecting PV modules to the inverter.

PV Module Selection Guidelines

PV Module Series and Parallel Configuration

How to configure PV modules in series and parallel for optimal performance.

Operation and Indicators

LED Indicators and Audible Alarms

Explains the meaning of different LED colors, flashing patterns, and buzzer sounds.

LCD Display Information

LCD Setting and Programs

Output Source Priority Configuration

Configures the priority of power sources (Solar, Utility, Battery) for load supply.

Maximum Charging Current Setting

Battery Voltage Setting Points

Charger Source Priority Configuration

Operating Mode Description

Standby Mode Operation

Line Mode Operation

Battery Mode Operation

Fault Reference Codes

Warning Indicators

Troubleshooting Common Problems

Troubleshooting Short Backup Time

Addresses issues where the backup time is shorter than expected.

Unit Operates in Battery Mode with Mains

Diagnoses why the unit might operate in battery mode when utility power is present.

Troubleshooting No LED Display

Solves the problem of no LED display on the front panel when utility power is normal.

Troubleshooting Buzzer and Red LED

Addresses situations where the buzzer beeps continuously and the red LED is on, indicating faults.

Technical Specifications

Input Specifications

Output Specifications

Battery Specifications

Solar Charger Specifications

APT Inverex S2400 XP Solar Specifications

General

Type	Solar Inverter
Rated Power	2400W
Efficiency	>90%
Brand	APT
AC Output Voltage	220V
Frequency	50Hz/60Hz
Protection Features	Overload, short circuit, reverse polarity, over temperature
Cooling	Fan
Model	Inverex S2400 XP