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Sofar solar 3.3-12KTL-X - User Manual

Sofar solar 3.3-12KTL-X
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SOFAR 3.3K~12KTL-X User manual
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© Shenzhen SOFARSOLAR Co ., Ltd.
0
User Manual
Solar Grid-tied Inverter
Product Model: Sofar 3.3 - 12KTL-X

Table of Contents

Questions and Answers

  • S
    Sean StokesAug 2, 2025
    What to do if Sofar solar 3.3-12KTL-X Inverter shows GFCI Fault?
    • R
      Robert NortonAug 2, 2025
      If the GFCI fault occurs occasionally on your Sofar solar inverter, it might be due to temporary external circuit abnormalities, and the inverter should automatically return to normal once the issue is resolved. However, if the fault happens frequently and persists, inspect the insulation resistance between the PV array and the ground. Also, check the insulation of your PV cables.
  • C
    Christian RiveraAug 6, 2025
    Why is the power grid voltage too high on my Sofar solar Inverter?
    • S
      Shelly BrewerAug 6, 2025
      If the alarm occurs occasionally, it could be due to occasional abnormalities in the electrical grid. The Sofar solar inverter should automatically return to normal when the grid stabilizes. However, if the alarm happens frequently, verify that the grid voltage and frequency are within the acceptable range. If they are not, contact Sofar technical support. If the voltage and frequency are within range, inspect the AC circuit breaker and AC wiring of the inverter. If the problem persists even with correct voltage, frequency, and wiring, contact Sofar support to adjust the over-voltage and over-frequency protection points after getting approval from your local electrical grid operator.
  • S
    sandraevansAug 10, 2025
    Why is my Sofar solar Inverter derating because of high temperature?
    • D
      David JimenezAug 10, 2025
      Ensure that the installation location and method comply with the requirements. Verify that the ambient temperature around the installation site does not exceed the upper limit. If it does, improve ventilation to lower the temperature. Also, check for ID90-ID92 faults, which indicate a fan problem. If a fan fault exists, replace the affected fan.
  • J
    Jordan ReyesAug 14, 2025
    What to do if the input voltage is too high on Sofar solar Inverter?
    • C
      Christopher ValenciaAug 14, 2025
      The input voltage may be too high because too many PV modules are connected in series in a PV string, causing the voltage (Voc) of the PV string to exceed the maximum input voltage of the Sofar solar inverter. If this is the case, adjust the number of PV modules connected in series to decrease the voltage of the PV string to fit within the input voltage range of the inverter. The inverter should automatically return to normal operation after these adjustments.
  • L
    Lisa AdamsAug 19, 2025
    What to do if the input voltage is too low on Sofar solar 3.3-12KTL-X?
    • J
      jodygoodAug 19, 2025
      The input voltage may be too low if too few PV modules are connected in series in a PV string, resulting in the voltage (Vmp) of the PV string being lower than the minimum operating voltage of the Sofar solar inverter. If this is the case, adjust the number of series-connected PV modules to increase the voltage of the PV string to fit the input voltage range of the inverter. The inverter should automatically return to normal operation after these adjustments.
  • A
    Angela AguilarAug 23, 2025
    What to do if the fan4 is fault on Sofar solar 3.3-12KTL-X?
    • T
      Tiffany CherryAug 23, 2025
      Inspect the external fan with blue heat-shrink tubing to see if it's not working. If it is not working, replace the fan. If the alarm persists after replacement, contact Sofar technical support.
  • A
    Ann DiazAug 28, 2025
    What causes low insulation resistance on Sofar solar Inverter?
    • T
      Timothy WashingtonAug 28, 2025
      Check the insulation resistance between the PV array and earth (ground). If a short circuit is found, fix the fault.

Summary

Basic Safety Information

Safety Instructions

General safety guidelines and warnings for inverter installation and operation.

Symbols and Signs

Explains warning symbols and their meanings used in the manual.

Product Characteristics

Product Identification

Identifies inverter components, ports, and physical layout.

Function Description

Details the inverter's functions, capabilities, and operational modes.

Protection Modules

Describes the inverter's internal safety and protection mechanisms.

Installation

Installation Process

Overview of the general steps for installing the inverter.

Checking Before Installation

Pre-installation checks, including package contents and environmental readiness.

Tools

Lists the necessary tools required for the inverter installation.

Electrical Connections

Electrical Connection

General guidelines and compliance requirements for electrical connections.

Grounding Connection (PE)

Details proper procedures for grounding the inverter for safety.

Connecting AC Output Power Cables

Instructions for connecting the AC power output cables to the inverter.

Commissioning of Inverter

Safety Inspection Before Commissioning

Essential safety checks to perform before starting the inverter.

Start Inverter

Step-by-step guide for powering on and starting the inverter.

Shutdown Inverter

Steps to safely power off and shut down the inverter.

Operation Interface

Operation and Display Panel

Describes the physical buttons and indicator lights on the inverter's panel.

Standard Interface

Explains the main LCD display and its basic information presentation.

Main Interface

Navigating the main menu and accessing system settings.

Troubleshooting and Maintenance

Earth Fault; GFCI

Specific fault handling and monitoring for Earth Fault and GFCI issues.

Trouble shooting

General troubleshooting steps, common problems, and diagnostic tips.

Decommissioning

Decommissioning Steps

Procedure for safely removing and disconnecting the inverter.

Package

Instructions for packing the inverter, preferably in original packaging.

Storage

Guidelines for storing the inverter in appropriate environmental conditions.

Disposal

Information on the safe and environmentally sound disposal of the inverter.

Technical Data

Input Parameter (DC)

Lists the DC input specifications and ranges for various models.

Output Parameter (AC)

Lists the AC output specifications and ratings for various models.

Efficiency, Safety and Protection

Details efficiency ratings, safety certifications, and protection features.

Quality Assurance

Standard Warranty Period

Details the warranty terms, periods, and conditions for the product.

Sofar solar 3.3-12KTL-X Specifications

General IconGeneral
Model3.3-12KTL-X
Number of MPPTs2
Rated Grid Frequency50/60Hz
Grid Frequency Range45-55Hz/55-65Hz
THDi<3%
DC SwitchYes
Protection DegreeIP65
Rated AC Output Power3300-12000W
Rated Grid Voltage220/230/240V
Grid Voltage Range180-280V
Power Factor0.8 leading - 0.8 lagging
Operating Temperature Range-25°C to +60°C
CommunicationRS485
Weight18kg

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