APT Inverex S1200 XP Solar User Manual (English)

Questions and Answers:

S
samantha61Aug 3, 2025
What to do if APT Inverter beeps continuously and red LED is on?
- S
  Scott CruzAug 4, 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.
V
Virginia HallAug 10, 2025
Why APT Inverex S1200 XP Solar works in battery mode when mains exist?
- L
  Lori ButlerAug 10, 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.
J
Jasmine BurtonAug 18, 2025
How to fix shorten backup time of APT Inverex S1200 XP Solar after power failure?
- R
  Rodney BatesAug 18, 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.
D
Danielle MillerAug 26, 2025
What to do if no LED display on APT Inverex S1200 XP Solar Inverter when power is normal?
- S
  savagewendyAug 26, 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.

APT Inverex S1200 XP Solar Specifications

General

Category	Inverter
Battery Voltage	12VDC
Waveform	Pure Sine Wave
Efficiency	>90%
Cooling	Fan Cooling
AC Input Frequency	50Hz
Output Frequency	50Hz
Protection	Overload, Short Circuit
Operating Temperature	0°C to 40°C
Model	Inverex S1200 XP Solar

Summary

Introduction

Important Safety Warning

General Precaution

The unit is designed for indoor use. Do not expose to rain, snow or liquids. Use qualified batteries.

Personnel Precaution

Be careful to reduce risk of dropping metal tools on batteries. Remove personal metal items.

Product Overview

Installation

Mounting the unit

Steps for mounting the unit vertically to a wall surface, including selecting location and drilling marks.

Connect to Utility and Charge

Connect the AC input cord to the wall outlet to charge the external battery automatically.

Connect External Battery

Step-by-step guide to connect external battery cables, ensuring correct polarity and using appropriate cables.

Connect to Solar Panel

Procedure for connecting PV modules, including installing a DC circuit breaker and proper wiring.

PV Module Selection

Operation

Power On/Off

Instructions on how to turn the unit on and off using the power switch.

LED Indicators & Audible Alarms

Description of LED indicators (Green, Red, Yellow) and audible alarms with their respective messages.

LCD Display

Explanation of the LCD display elements for input, configuration, output, and battery information.

LCD Setting

Guide to entering setting mode to configure programs using UP/DOWN and ENTER buttons.

Output Source Priority

Configure load power source priority between Solar, Utility, and Battery.

Maximum Charging Current

Configure total charging current from utility and solar chargers.

AC Input Voltage Range

Set the acceptable AC input voltage range for the inverter.

Auto Restart on Overload

Configure the auto-restart function after an overload condition.

Output Frequency

Set the output frequency of the inverter.

Maximum Utility Charging Current

Set the maximum charging current from the utility.

Voltage Point for Utility Switchback

Set the battery voltage point to switch back to utility source.

Voltage Point for Battery Switchback

Set the battery voltage point to switch back to battery mode.

Charger Source Priority

Configure the charger source priority for Line, Standby or Fault mode.

Alarm Control

Enable or disable audible alarms.

Auto Return to Default Display

Configure the display to automatically return to default screen.

Backlight Control

Control the backlight of the LCD display (on/off).

Beeps on Primary Source Interruption

Configure beeps when the primary power source is interrupted.

Display Setting

Input/Output Voltage Display

Shows input and output voltage values on the LCD screen.

Input Frequency Display

Shows input frequency on the LCD screen.

Load Percentage Display

Shows the current load percentage on the LCD screen.

Load in VA Display

Shows the connected load in Volt-Amperes (VA) on the LCD.

PV Voltage Display

Shows the PV voltage on the LCD screen.

Charging Current Display

Shows the charging current from PV when normal on the LCD.

Battery Voltage Display

Shows the battery voltage on the LCD screen.

Output Frequency Display

Shows the output frequency on the LCD screen.

Load in Watt Display

Shows the connected load in Watts (W) on the LCD.

Main CPU Version Display

Shows the main CPU version on the LCD screen.

Secondary CPU Version Display

Shows the secondary CPU version on the LCD screen.

Operating Mode Description

Standby Mode

Inverter bypass to output, charger available, LCD backlight off.

Line Mode

Unit provides output power from mains and charges battery.

Battery Mode

Unit provides output power from battery and PV power, or battery only.

Fault Reference Code

Warning Indicator

Trouble Shooting

Specifications

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APT Inverex S1200 XP Solar User Manual

Table of Contents

Questions and Answers:

APT Inverex S1200 XP Solar Specifications

Summary

Introduction

Important Safety Warning

General Precaution

Personnel Precaution

Product Overview

Installation

Mounting the unit

Connect to Utility and Charge

Connect External Battery

Connect to Solar Panel

PV Module Selection

Operation

Power On/Off

LED Indicators & Audible Alarms

LCD Display

LCD Setting

Output Source Priority

Maximum Charging Current

AC Input Voltage Range

Auto Restart on Overload

Output Frequency

Maximum Utility Charging Current

Voltage Point for Utility Switchback

Voltage Point for Battery Switchback

Charger Source Priority

Alarm Control

Auto Return to Default Display

Backlight Control

Beeps on Primary Source Interruption

Display Setting

Input/Output Voltage Display

Input Frequency Display

Load Percentage Display

Load in VA Display

PV Voltage Display

Charging Current Display

Battery Voltage Display

Output Frequency Display

Load in Watt Display

Main CPU Version Display

Secondary CPU Version Display

Operating Mode Description

Standby Mode

Line Mode

Battery Mode

Fault Reference Code

Warning Indicator

Trouble Shooting

Specifications

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