Sofar HYD 5KTL-3PH User manual

TABLE OF CONTENT
2HYD 5~20KTL-3PH
Table of Content
1 About this manual 5
1.1 Copyright declaration 5
1.2 Structure of the manual 5
1.3 Scope 5
1.4 Target group 6
1.5 Symbols used 6
2 Basic safety information 7
2.1 Safety information 7
2.2 Symbols and signs 10
3 Product features 13
3.1 Product information 13
3.2 Product dimensions 14
3.3 Labelling on the device 14
3.4 Functional features 15
3.5 Application modes 17
3.6 Connecting BTS 5K batteries 22
4 Installation 24
4.1 Installation information 24
4.2 Installation procedure 24
4.3 Examination before installation 25
4.4 Connections 28
4.5 Tools 30
4.6 Installation Environment Requirements 31
4.7 Installation location 31
4.8 Unpacking the inverter 33

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HYD 5~20KTL-3PH 3
4.9 Installation of the inverter 34
5 Electrical connections 36
5.1 Safety instructions 36
5.2 Wiring overview 38
5.3 System overview 39
5.4 Electrical connection 44
5.5 Connecting the PE cables 44
5.6 Connecting the DC lines for the PV modules and battery 45
5.7 Connecting the AC power cables 48
5.8 AC connector installation 49
5.9 Communication interfaces 52
5.10 Feed-in limit function 68
5.11 System monitoring 68
5.12 Installation of the WiFi, or Ethernet stick 70
6 Commissioning the inverter 74
6.1 Safety test before commissioning 74
6.2 Double Check 74
6.3 Starting the inverter 74
6.4 Initial setup 75
6.5 Smartphone app SOFAR View 80
7 Operation of the device 82
7.1 Control panel and display field 82
7.2 Standard display 83
7.3 Energy storage modes 84
7.4 Menu structure 89
7.5 Firmware update 97
8 Troubleshooting handling 99

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4HYD 5~20KTL-3PH
8.1 Troubleshooting 99
8.2 Error list 100
8.3 Maintenance 116
9 Technical Data 117

ABOUT THIS MANUAL
HYD 5~20KTL-3PH 5
1 About 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 SOFAR. 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.
SOFAR 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.com for the
latest version.
The current version was updated on 9/4/23.
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.
1.3 Scope
This product manual describes the installation, electrical
connection, commissioning, maintenance and fault elimination
procedures of the HYD 5~20KTL-3PH inverters.

ABOUT THIS MANUAL
6HYD 5~20KTL-3PH
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.
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
HYD 5~20KTL-3PH 7
2 Basic safety information
NOTE
If you have any questions or problems after reading
the following information, please contact SOFAR
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 switch in the generation 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:

BASIC SAFETY INFORMATION
8HYD 5~20KTL-3PH
-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.
SOFAR 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.
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.
Observe all applicable electrical regulations when working with
the Solar inverter.

BASIC SAFETY INFORMATION
HYD 5~20KTL-3PH 9
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!
DANGER
Danger through electric shock!
All installations and electrical connections may only be
carried out by trained electricians!
IMPORTANT
Authorisation for grid feed-in
Obtain authorisation from the local power grid
operator before connecting the inverter to the public
power grid.
NOTE
Voiding of guarantee
Do not open the inverter or remove any of the labels.
Otherwise, SOFAR shall assume no guarantee.
2.1.5 Operation
DANGER
Electric shock
Contact with the electrical grid or the device's
terminals may result in an electric shock or fire!
Do not touch the terminal or the conductor which is
connected to the electrical grid.
Follow all instructions and observe all safety
documents that refer to the grid connection.

BASIC SAFETY INFORMATION
10 HYD 5~20KTL-3PH
CAUTION
Burning due to hot housing
While the inverter is being operated, several internal
components will become very hot.
Please wear protective gloves!
Keep children away from the device!
2.1.6 Repair and maintenance
DANGER
Dangerous voltage!
Before carrying out any repair work, first switch off the
AC circuit breaker between the inverter and power
grid, and then the DC switch.
After switching off the AC circuit breaker and the DC
switch, wait a minimum of 5 minutes before starting
any maintenance or repair work.
IMPORTANT
Unauthorised repairs!
Following the elimination of any faults, the inverter
should be fully functional once more. Should any
repairs be required, please contact a local authorised
service centre.
The internal components of the inverter must NOT be
opened without the relevant authorisation. Shenzhen
SOFARSOLAR Co., Ltd. assumes no responsibility for
any resulting losses or defects.
2.2 Symbols and signs

BASIC SAFETY INFORMATION
HYD 5~20KTL-3PH 11
CAUTION
Beware of burning hazards due to the hot housing!
While the inverter is in operation, only touch the
display and the buttons, as the housing can become
hot.
ATTENTION
Implement earthing!
The PV generator must be earthed in accordance with
the requirements of the local power grid operator!
For reasons of personal safety, we recommend that all
PV module frames and inverters of the PV system are
reliably earthed.
WARNING
Damage due to overvoltage
Ensure that the input voltage does not exceed the
maximum permissible voltage. Overvoltage may cause
long-term damage to the inverter, as well as other
damage that is not covered by the warranty!

BASIC SAFETY INFORMATION
12 HYD 5~20KTL-3PH
2.2.1 Symbols on the inverter
Several symbols pertaining to safety can be found on the
inverter. Please read and understand the content of these
symbols before starting the installation.
Symbol
Description
Residual voltage is present in the inverter! Before
opening the inverter, you should wait five minutes
to ensure that the capacitor has been fully
discharged.
Caution! Danger through electric shock
Caution! Hot surface
The product is compliant with EU guidelines
Earthing point
Please read the manual before installing the
inverter
Device degree of protection according to EN 60529
Positive and negative poles of the DC input voltage
The inverter must always be transported and
stored with the arrows pointing upward
RCM (Regulatory Compliance Mark)
The product meets the requirements of the
applicable Australian standards.

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HYD 5~20KTL-3PH 13
3 Product features
This chapter describes the product features, dimensions and
efficiency levels.
3.1 Product information
The HYD 5~20KTL-3PH is a grid-coupled PV and energy storing
inverter which can also supply energy in stand-alone operation.
The HYD 5~20KTL-3PH has integrated energy management
functions which cover a wide range of application scenarios.
HYD 5~20KTL-3PH inverters may only be used with photovoltaic
modules which do not require one of the poles to be earthed. In
normal operation, the operating current must not exceed the
limits specified within the technical data.

PRODUCT FEATURES
14 HYD 5~20KTL-3PH
The selection of the optional inverter parts must be determined
by a qualified technician who has good knowledge of the
installation conditions.
3.2 Product dimensions
3.3 Labelling on the device
Labelling must not be covered or removed!

PRODUCT FEATURES
HYD 5~20KTL-3PH 15
Note:the picture is only for reference,please make the object as the
standard.
3.4 Functional features
The DC output generated by the PV generator can be used for
both grid feed-in and battery charging.
The battery can supply the energy to the grid or the consumer.
The emergency current supply mode (EPS) can provide
inductive loads such as air conditioning systems or refrigerators
with an automatic switchover time of less than 10 milliseconds,
and a temporary overload of up to 10% is possible.
3.4.1 Functions
1. Two MPP trackers with 1.5-fold DC overload
2. Flexible switching between on-grid operation and energy
storage operation
3. Maximum efficiency when charging and discharging the
battery (97.8%)
4. Up to 2 battery strings with a combined maximum charging
and discharging current of 50 A
5. Wide battery input voltage range (180–800 V)
6. The EPS output can be connected to unbalanced loads
7. Up to 6 inverters can operate in parallel at the EPS
connection and AC connection

PRODUCT FEATURES
16 HYD 5~20KTL-3PH
8. Monitoring via RS485 and WiFi, optionally via Bluetooth
9. The inverter has built-in relays to control the short circuit of
the load N line to ground when off-grid (Available from
hardware version V003)
3.4.2 Electrical block diagram

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HYD 5~20KTL-3PH 17
3.5 Application modes
3.5.1 Typical energy storage system
A typical energy storage system with PV panels and battery
unit(s), connected to the grid.
3.5.2 System without PV connection
In this configuration, there are no PV panels connected and the
battery is charged through the grid connection.

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18 HYD 5~20KTL-3PH
3.5.3 System without battery
In this configuration, the battery unit(s) can be added later.
3.5.4 Back-up mode (off-grid)
When there is no grid connection, the PV panels and the battery
will provide electricity to the critical load.

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HYD 5~20KTL-3PH 19
3.5.5 System with multiple inverters (5–120 kW)
Up to 6 inverters can be connected in parallel, to the grid and
EPS connections, resulting in an EPS output of up to 120 kVA.
NOTE
Multiple inverters connected in parallel shall be of the
same power model with the same power and battery
configuration.
The smart meter or CTs are connected to the Master
inverter. Control of all inverters takes place via the
link cable.
For the parallel switching of several devices, it is
recommended to use a joint AC load break switch for
the connected loads at the LOAD connection.
For the parallel switching of several devices, it is
recommended to use a joint AC load break switch for
the connected loads at the GRID connection.
In order to evenly distribute the loads among the
inverters, the cable length between each output and
the load must be the same.

PRODUCT FEATURES
20 HYD 5~20KTL-3PH
If the maximum apparent power of a load is greater
than 110% of the inverter' s rated output, the device
must not be connected via the AC LOAD terminal,
but rather directly to the grid.
3.5.6 AC retrofit system
In this system configuration, the hybrid system for an already
existing PV system is supplemented with a solar inverter of any
brand. By installing a second smart meter, the PV production
can be taken into account and used for charging the battery.
NOTE
The communication address of meter 1 should be set
to 1. Similarly, the communication address of meter 2
should be set to 2.
3.5.7 Unbalanced load
By enabling the “Unbalanced load” option, the inverter
compensates unbalanced loads either in EPS mode.