Sofar 25KTLX-G3 User manual
SOFAR 25 … 50KTLX-G3
Installation and
operating manual
Version 01 | March 2023
English
SOFAR 25KTLX-G3, 30KTLX-G3, 30KTLX-G3-A, 33KTLX-G3, 36KTLX-G3,
40KTLX-G3, 45KTLX-G3, 50KTLX-G3
TABLE OF CONTENT
2 SOFAR 25 ... 50KTLX-G3
Table of Content
1About this manual 5
1.1 Copyright declaration 5
1.2 Structure of the manual 5
1.3 Scope 6
1.4 Target group 6
1.5 Symbols used 6
2Basic safety information 8
2.1 Safety information 8
2.2 Symbols and signs 13
3Product features 16
3.1 Product dimensions 16
3.2 Power grid types 17
3.3 Product dimensions 17
3.4 Labelling on the device 19
3.5 Functional features 19
3.6 Efficiency curve 21
4Installation 23
4.1 Installation information 23
4.2 Installation procedure 23
4.3 Examination before installation 24
4.4 Connections 26
TABLE OF CONTENT
SOFAR 25 ... 50KTLX-G3 3
4.5 Tools 26
4.6 Installation location 28
4.7 Unpacking the inverter 30
4.8 Installation of the inverter 31
5Electrical connections 33
5.1 Safety instructions 33
5.2 Electrical connection 34
5.3 Connecting the PE cables 35
5.4 Connecting the DC cables 37
5.5 Connecting the AC power cables 40
5.6 Communication ports 46
5.7 Energy meter connection 53
5.8 System monitoring 55
6Commissioning the inverter 61
6.1 Safety test before commissioning 61
6.2 Starting the inverter 61
6.3 Smartphone app SOFAR View 62
7Operation of the device 63
7.1 Control panel and display field 63
7.2 Standard display 64
7.3 Status display 64
7.4 Menu structure 65
TABLE OF CONTENT
4 SOFAR 25 ... 50KTLX-G3
7.5 Software update 68
8Troubleshooting handling 70
8.1 Troubleshooting 70
8.2 Maintenance 79
9Technical data 82
ABOUT THIS MANUAL
SOFAR 25 ... 50KTLX-G3 5
1About this manual
This manual contains important safety information that must be
observed during installation and maintenance of the device.
Carefully read this manual before use and retain it for future
reference!
This manual must be treated as an integral component of the device.
The manual must be kept in close proximity to the device, including
when it is handed over to another user or moved to a different location.
1.1 Copyright declaration
The copyright of this manual is owned by SOFARSOLAR. It may not be
copied –neither partially nor completely –by companies or individuals
(including software, etc.) and must not be reproduced or distributed in
any form, or with the appropriate means.
SOFARSOLAR reserves the right to final interpretation. This manual
may be amended following feedback from users or customers. Please
consult our website at http://www.sofarsolar.eu for the latest version.
The current version was updated on 12/07/2023.
1.2 Structure of the manual
This manual contains important safety and installation instructions that
must be observed during installation and maintenance of the device.
ABOUT THIS MANUAL
6 SOFAR 25 ... 50KTLX-G3
1.3 Scope
This product manual describes the installation, electrical connection,
commissioning, maintenance and fault elimination procedures of the
SOFAR 25 ... 50KTLX-G3 inverters.
1.4 Target group
This manual is intended for specialist electrical engineers who are
responsible for the installation and commissioning of the inverter in the
PV system, as well as the PV system operators.
1.5 Symbols used
This manual contains information on safe operation and uses symbols
to ensure the safety of persons and property as well as the efficient
operation of the inverter. Please read through the following symbol
explanations carefully in order to prevent injury or property damage.
ABOUT THIS MANUAL
SOFAR 25 ... 50KTLX-G3 7
DANGER
Non-observance will result in death or serious injury.
•Follow the warnings in order to prevent death or serious
injury!
WARNING
Non-observance may result in death or serious injury.
•Follow the warnings in order to prevent serious injury!
CAUTION
Non-observance may result in minor injury.
•Follow the warnings in order to prevent injury!
ATTENTION
Non-observance may result in property damage!
•Follow the warnings in order to prevent damage to or
destruction of the product.
NOTE
•Provides tips essential to the optimal operation of the
product.
BASIC SAFETY INFORMATION
8 SOFAR 25 ... 50KTLX-G3
2Basic safety information
NOTE
•If you have any questions or problems after reading the
following information, please contact SOFARSOLAR
This chapter details the safety information pertaining to the installation
and operation of the device.
2.1 Safety information
Read and understand the instructions within this manual and
familiarise yourself with the relevant safety symbols in this chapter
before beginning with the installation of the device and eliminating any
faults.
Before connecting to the power grid, you must obtain official
authorisation from the local power grid operator in accordance with the
corresponding national and state requirements. Furthermore, operation
may only be carried out by qualified electricians.
Please contact the nearest authorised service centre if any
maintenance or repairs are required. Please contact your dealer to
obtain information about your nearest authorised service centre. Do
NOT carry out repairs on the device yourself; this may lead to injury or
property damage.
Before installing the device or carrying out maintenance on it, you must
open the DC switch in order to interrupt the DC voltage of the PV
generator. You can also switch off the DC voltage by opening the DC
BASIC SAFETY INFORMATION
SOFAR 25 ... 50KTLX-G3 9
switch in the Array junction box. Not doing this may result in serious
injury.
2.1.1 Qualified personnel
Personnel tasked with the operation and maintenance of the device
must have the qualifications, competence and experience required to
perform the described tasks, while also being capable of fully
understanding all instructions contained within the manual. For safety
reasons, this inverter may only be installed by a qualified electrician
who:
-has received training on occupational safety, as well as the
installation and commissioning of electrical systems
-is familiar with the local laws, standards and regulations of the grid
operator.
SOFARSOLAR assumes no responsibility for the destruction of property
or any injuries to personnel caused by improper usage.
2.1.2 Installation requirements
Please install the inverter according to the information contained in the
following section. Mount the inverter to a suitable object with a
sufficient load-bearing capacity (e.g. walls, PV frames etc.) and ensure
that the inverter is upright. Choose a suitable place for the installation
of electrical devices. Ensure that there is sufficient space for an
emergency exit which is suitable for maintenance. Ensure sufficient
ventilation in order to guarantee an air circulation for the cooling of the
inverter.
BASIC SAFETY INFORMATION
10 SOFAR 25 ... 50KTLX-G3
2.1.3 Transport requirements
The factory packaging is specifically designed to prevent transport
damage, i.e. violent shocks, moisture and vibrations. However, the
device must not be installed if it is visibly damaged. In this case, notify
the responsible transport company immediately.
2.1.4 Labelling on the device
The labels must NOT be concealed by items and foreign objects (rags,
boxes, devices, etc.); they must be regularly cleaned and kept clearly
visible at all times.
2.1.5 Electrical connection
Observe all applicable electrical regulations when working with the
Solar inverter.
DANGER
Dangerous DC voltage
•Before establishing the electrical connection, cover the PV
modules using opaque material or disconnect the PV
generator from the inverter. Solar radiation will cause
dangerous voltage to be generated by the PV generator!
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