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Sofar solar 3.3~12KTLX-G3 - User Manual

Sofar solar 3.3~12KTLX-G3
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Shenzhen SOFARSOLAR Co., Ltd.
Solar Grid-tied Inverter
Product Model: SOFAR 3.3~12KTLX-G3
User manual

Table of Contents

Questions and Answers

  • C
    Cindy ScottAug 17, 2025
    What to do if my Sofar solar Inverter is force shutdown?
    • C
      Carolyn HowellAug 18, 2025
      If your Sofar solar Inverter is remotely controlled and undergoing a forced shutdown, but you are not controlling it, disconnect the DC switch of the inverter. Wait five minutes, then turn the DC switch back on. After the inverter restarts, check if the problem is resolved. If not, contact SOFARSOLAR customer service.
  • K
    Kevin ReedAug 20, 2025
    What to do if my Sofar solar 3.3~12KTLX-G3 Inverter shows GridUVP error?
    • R
      Robert Hall MDAug 20, 2025
      If your Sofar solar Inverter displays the GridUVP alarm frequently, first verify that the grid voltage and frequency are within the acceptable range. If they are not, contact technical support. If the voltage and frequency are normal, inspect the AC circuit breaker and AC wiring of the inverter.
  • F
    Frank EwingAug 23, 2025
    How to fix OverTemp Derating error on Sofar solar Inverter?
    • D
      daviskirkAug 23, 2025
      If your Sofar solar Inverter shows OverTemp Derating, make sure the installation location and method comply with the user manual's requirements. Check if the ambient temperature exceeds the upper limit; if so, improve ventilation. Also, check for dust or foreign objects blocking the fan at the air inlet, and clean the inverter every half a year to improve ventilation and heat dissipation.
  • Z
    Zachary WilliamsAug 26, 2025
    What to do if my Sofar solar Inverter has GFCIFault?
    • A
      Amanda GardnerAug 26, 2025
      If your Sofar solar Inverter displays a GFCIFault, and it occurs occasionally, it might be due to temporary abnormalities in external circuits. The inverter should automatically return to normal operation once the fault is corrected. If the fault happens frequently and persists, check the insulation resistance between the PV array and earth (ground) and inspect the insulation condition of the PV cable.
  • G
    Gabriella DukeAug 27, 2025
    Why does my Sofar solar 3.3~12KTLX-G3 show GridOVP error?
    • C
      cpriceAug 27, 2025
      If your Sofar solar Inverter is showing a GridOVP alarm occasionally, it's likely due to occasional abnormalities in the electric grid. The inverter should automatically return to normal operation when the electric grid returns to its normal state.
  • H
    Hector RichardsAug 30, 2025
    How to solve RelayFail error on Sofar solar 3.3~12KTLX-G3 Inverter?
    • B
      Bobby HansonAug 30, 2025
      To address the RelayFail error on your Sofar solar Inverter, check if the resistance to ground of the PV string is too low, and inspect the PV cable for any insulation damage. If this does not solve the issue, contact the new energy customer service of Capital Airlines.
  • K
    Krista MartinezSep 1, 2025
    What to do if my Sofar solar 3.3~12KTLX-G3 Inverter displays GridOFP error?
    • K
      Kristen WoodSep 2, 2025
      If your Sofar solar Inverter displays the GridOFP alarm repeatedly, and the grid voltage/frequency is within the correct range while the AC wiring is properly connected, contact technical support. You may need to change the grid over-voltage, under-voltage, over-frequency, and under-frequency protection points after getting approval from the local electrical grid operator.
  • A
    acostaphilipSep 4, 2025
    How to troubleshoot FanFault1 on Sofar solar 3.3~12KTLX-G3 Inverter?
    • J
      Jennifer ScottSep 4, 2025
      If your Sofar solar Inverter displays a FanFault1 error, check for dust or foreign objects blocking the fan at the air inlet. If found, improve the ventilation and heat dissipation of the environment. It's recommended to clean the inverter every six months.
  • S
    Stephanie CraigSep 6, 2025
    What to do if my Sofar solar 3.3~12KTLX-G3 displays OVRT error?
    • D
      Danielle KeySep 7, 2025
      If your Sofar solar Inverter shows an OVRT error, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch” again. Check if this resolves the fault. If not, contact technical support.
  • C
    Christina ReedSep 9, 2025
    How to fix GFCIDeviceFault(DC) error on Sofar solar Inverter?
    • T
      Tiffany HernandezSep 9, 2025
      If your Sofar solar Inverter displays a GFCIDeviceFault(DC) error, turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch” again. Check if this resolves the fault. If not, contact technical support.

Summary

Basic Safety Information

Requirement for Installation and Maintenance

Outlines requirements for safe installation and maintenance procedures.

Symbols and signs

Explains various symbols and warning signs used on the inverter and its labels.

Product Characteristics

Intended Use

Specifies the intended applications and operating conditions for the inverter.

Function Description

Describes the functional modules and operational principles of the inverter.

Electrical block diagram

Visual representation of the inverter's internal electrical components and connections.

Efficiency and derating curve

Illustrates the inverter's efficiency performance and derating factors under various conditions.

Installation

Installation Process

Step-by-step procedure for the installation of the inverter.

Checking Before Installation

Procedures for verifying package contents and preparing for installation.

Tools

Lists the necessary tools required for installation and electrical connection.

Determining the Installation Position

Guidance on selecting an appropriate and safe location for inverter mounting.

Transporting the inverter

Instructions and precautions for safely moving and handling the inverter.

Installation

Detailed steps for physically mounting the inverter onto the wall bracket.

Electrical Connection

Electrical Connection

General guidelines and flowchart for electrical connections.

Grounding Connection (PE)

Details on establishing a proper protective earth (PE) connection for safety.

AC-Output Wiring

Instructions for connecting the AC output power cable to the grid.

Connect PV side of inverter (DC-Input)

Procedures for connecting the DC input from PV arrays to the inverter.

Communication Connection

Steps for establishing communication links via USB, RS485, or WiFi/Ethernet.

Commissioning of inverter

Cable Connection Inspection

Checks to ensure correct electrical connections before startup.

Start Inverter

Detailed steps for safely starting the inverter after installation.

Shutdown inverter

Procedures for safely turning off the inverter.

Setting power quality response modes

Configuration of inverter settings related to power quality and grid interaction.

Operation interface

Operation and Display Panel

Explains the functions of buttons and indicator lights on the inverter's panel.

Standard Interface

Displays and explains the standard operating status screens of the inverter.

Main Interface

Navigation and options within the inverter's main menu system.

Updating Inverter Software

Instructions on how to update the inverter's firmware via USB.

Trouble shooting and maintenance

Troubleshooting

Lists common errors, their causes, and resolution steps.

Maintenance

Recommendations for general maintenance and cleaning of the inverter.

Technical Data

Quality Assurance

Sofar solar 3.3~12KTLX-G3 Specifications

General IconGeneral
Number of MPPTs2
THDi<3%
THD<3%
DC SwitchYes
Protection DegreeIP65
MPPT Voltage Range140-1000V
Rated AC Voltage220V/230V
AC Voltage Range180V~280V
Rated Grid Frequency50/60Hz
Power Factor>0.99
Operating Temperature Range-25°C~60°C
CommunicationRS485
Output Voltage Range180V~280V
Output Frequency Range50/60Hz

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