Sofar 7.5KTLM User Manual (English)

Questions and Answers:

B
Breanna HoustonAug 17, 2025
What to do if Sofar 7.5KTLM shows GridOVP?
- D
  Diana FisherAug 17, 2025
  If the GridOVP alarm occurs occasionally, it might be due to an abnormal electric grid. However, if the alarm occurs frequently, verify that the grid voltage/frequency is within the acceptable range. If it is not, contact technical support. If the voltage/frequency is within range and the AC wiring is correct, but the alarm persists, contact technical support to adjust the over-voltage and over-frequency protection points after getting approval from the local electrical grid operator. Also, check the AC circuit breaker and AC wiring of the inverter.
I
ifrenchAug 19, 2025
What to do if Sofar 7.5KTLM displays GFCIFault?
- S
  Sara CombsAug 19, 2025
  If the GFCIFault occurs occasionally, it might be due to external circuit abnormalities. If the fault occurs frequently and lasts a long time, check the insulation resistance between the PV array and earth (ground). Also, check the insulation conditions of the PV cable.
J
Jamie ArroyoAug 22, 2025
Why does Sofar 7.5KTLM show PVOVP?
- T
  Theresa RodriguezAug 22, 2025
  The PVOVP error appears if too many PV modules are series connected in a PV string, causing the voltage (Voc) of the PV string to exceed the inverter's maximum input voltage. To fix this, adjust the number of series-connected PV modules to decrease the voltage of the PV string to fit within the inverter's input voltage range. The inverter should automatically return to normal operation after these adjustments.
S
Sandra FuentesAug 25, 2025
What causes OverTempFault_Inv in Sofar 7.5KTLM and how to fix it?
- A
  Amber LeonardAug 26, 2025
  The OverTempFault_Inv error appears if the ambient temperature of the installation location exceeds the upper limit. To resolve this, improve ventilation to decrease the temperature.
P
Peter MillerAug 28, 2025
Why does Sofar 7.5KTLM Inverter show PVUVP?
- D
  Dr. Alicia JonesAug 28, 2025
  The PVUVP error appears if too few PV modules are series connected in a PV string, so the voltage (Vmp) of the PV string is lower than the minimum operating voltage of the inverter. To resolve this, 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 automatically returns to normal operating status after correct adjustments.
D
Dr. Jeremy SandersAug 30, 2025
What causes Over Temp Derating on Sofar 7.5KTLM?
- E
  ericahancockAug 31, 2025
  Ensure the installation position and installation method meet the requirements. Check whether the ambient temperature of the installation position exceeds the upper limit. If it does, improve ventilation to decrease the temperature.
N
Neil SteeleSep 2, 2025
What to do if Sofar Inverter displays HwBoostOCP?
- E
  Elizabeth RobinsonSep 2, 2025
  Check whether the input current is higher than the maximum input current of inverters. Then check the input wiring, if both are correct, please contact technical support.
B
Briana ThorntonSep 5, 2025
What does BusUVP mean on a Sofar 7.5KTLM?
- R
  Rebecca Burton DVMSep 5, 2025
  If the PV array configuration is correct, the BusUVP error appears when the solar irradiance is too low. The inverter automatically returns to normal operating status after the solar irradiance returns to a normal level.
K
Kathy WilliamsSep 7, 2025
What to do if Sofar 7.5KTLM Inverter shows HwAcOCP?
- S
  Stacey DavisSep 7, 2025
  Turn OFF the “DC switch”, wait for 5 minutes, then turn ON the “DC switch”. Check whether the fault is rectified. If not, please contact technical support.
A
Ana PhillipsSep 10, 2025
What to do if Sofar 7.5KTLM displays PvIsoFault?
- J
  Jasmine OlsonSep 10, 2025
  Check the insulation resistance between the PV array and earth (ground). If a short circuit occurs, rectify the fault.

Sofar 7.5KTLM Specifications

General

Brand	Sofar
Model	7.5KTLM
Category	Inverter
Language	English

Summary

1. Basic safety information

1.1. Safety instructions

Instructions for safe installation and operation of the inverter.

1.2. Symbols and signs

Explains important safety symbols used in the manual.

2. Product characteristics

2.1. Product dimensions

Details the physical dimensions and views of the inverter.

2.2. Function description

Describes the internal workings and function modules of the inverter.

2.3. Efficiency curve

Presents the efficiency curves of the inverter at different operating points.

3. Installation

3.1. Installation Process

Provides a step-by-step flowchart for installing the inverter.

3.2. Checking Before Installation

Guides on checking outer packaging and deliverables before installation.

3.3. Tools

Lists the necessary tools required for installation and electrical connections.

3.4. Determining the Installation Position

Specifies requirements for choosing an appropriate installation location.

3.5. Moving the SOFAR 7.5KTLM

Details the procedure for safely moving the inverter to its installation position.

3.6. Installing SOFAR 7.5KTLM

Step-by-step guide for physically mounting the inverter onto the wall.

4. Electrical Connections

4.1. Electrical connection

Overview flowchart for connecting various cables to the inverter.

4.2. Connecting PGND Cables

Instructions for connecting the grounding (PGND) cables to the inverter.

4.3. Connecting DC Input Power Cables

Detailed procedure for connecting DC input power cables to the inverter.

4.4. Connecting AC Output Power Cables

Guide on connecting the AC output power cables to the grid.

4.5. RS485,CT,inverter logic interface connection

Describes connections for communication interfaces like RS485 and CT.

4.6. WIFI/GPRS module installation procedure

Steps for installing the optional WIFI/GPRS communication module.

4.7. Communication method

Explains different methods for communication with the inverter.

5. Commissioning of inverter

5.1. Safety inspection before commissioning

Checks to perform before starting the inverter's commissioning process.

5.2. Start inverter

Instructions on how to safely start and operate the inverter.

6. Operation interface

6.1. Operation and Display Panel

Overview of the inverter's display panel, buttons, and indicator lights.

6.2. Standard Interface

Shows examples of standard display interfaces for the inverter.

6.3. Main Interface

Details the main menu structure and navigation for inverter settings.

6.4. Update Software online

Procedure for updating the inverter's firmware using an SD card.

7. Trouble shooting

7.1. Trouble shooting

Information and procedures for identifying and solving inverter problems.

7.2. Maintenance

Guidelines for routine maintenance and cleaning of the inverter.

8. Technical data

8.1. Input parameters (DC)

Lists the technical specifications for DC input parameters.

8.2. Output parameters (AC)

Lists the technical specifications for AC output parameters.

8.3. Efficiency,Protection and Communication

Covers efficiency ratings, protection features, and communication standards.

8.4. General Date

Provides general technical data and specifications for the inverter.

9. Quality Assurance

Standard warranty period

Details the standard warranty terms and duration for the inverter.

Extended warranty period

Explains options and procedures for purchasing extended warranty coverage.

Invalid warranty clause

Lists conditions under which the inverter warranty is void.

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Sofar 7.5KTLM User Manual

Table of Contents

Questions and Answers:

Sofar 7.5KTLM Specifications

Summary

1. Basic safety information

1.1. Safety instructions

1.2. Symbols and signs

2. Product characteristics

2.1. Product dimensions

2.2. Function description

2.3. Efficiency curve

3. Installation

3.1. Installation Process

3.2. Checking Before Installation

3.3. Tools

3.4. Determining the Installation Position

3.5. Moving the SOFAR 7.5KTLM

3.6. Installing SOFAR 7.5KTLM

4. Electrical Connections

4.1. Electrical connection

4.2. Connecting PGND Cables

4.3. Connecting DC Input Power Cables

4.4. Connecting AC Output Power Cables

4.5. RS485,CT,inverter logic interface connection

4.6. WIFI/GPRS module installation procedure

4.7. Communication method

5. Commissioning of inverter

5.1. Safety inspection before commissioning

5.2. Start inverter

6. Operation interface

6.1. Operation and Display Panel

6.2. Standard Interface

6.3. Main Interface

6.4. Update Software online

7. Trouble shooting

7.1. Trouble shooting

7.2. Maintenance

8. Technical data

8.1. Input parameters (DC)

8.2. Output parameters (AC)

8.3. Efficiency,Protection and Communication

8.4. General Date

9. Quality Assurance

Standard warranty period

Extended warranty period

Invalid warranty clause

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