Sofar solar BTS E5-DS5 User manual

BTS E5 … E20-DS5
Installation and
operating manual
Version 01 | November 2022
English
BTS E5-DS5, E10-DS5, E15-DS5, E20-DS5

ABOUT THIS MANUAL
2 BTS E5–E20-DS5

ABOUT THIS MANUAL
BTS E5–E20-DS5 3
Table of Contents
1 About 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 15
3Product features 18
3.1 Product introduction 18
3.2 BTS battery system components 19
3.3 Product dimensions 20
3.4 Labelling on the device 20
3.5 Battery capacity expansion 21
4Installation 23
4.1 Installation information 23
4.2 Examination before installation 24
4.3 Connections 28
4.4 Tools 29
4.5 Installation location 31
4.6 Installation of the battery system 33
5Electrical connections 38

ABOUT THIS MANUAL
4 BTS E5–E20-DS5
5.1 Safety instructions 38
5.2 Electrical connection 39
5.3 Connecting the PE cable 39
5.4 Connecting the power cables 40
5.5 Connecting the communication cables 42
5.6 Connecting the inverter 44
5.7 Parallel system setup 53
5.8 Replacing the fuse 54
5.9 Installing the protective cover 55
6Commissioning the battery system 56
6.1 Safety check before commissioning 56
6.2 Initial startup 56
6.3 Setting the parameters 56
6.4 Software update 57
6.5 Shutdown procedure 58
7Operation of the device 59
7.1 Control panel and display field 59
8Troubleshooting handling 62
8.1 Troubleshooting 62
8.2 Maintenance 64
9Manufacturer's warranty and liability terms 67
9.1 Warranty period 67
9.2 Warranty void 67
10 Technical data 69

ABOUT THIS MANUAL
BTS E5–E20-DS5 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.com for the latest version.
The current version was updated on 05/12/2022.
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 BTS E5–E20-DS5
1.3 Scope
This product manual describes the installation, electrical connection,
commissioning, maintenance and troubleshooting of the BTS E5...20-
DS5 energy storage system. The series includes the following models:
BTS E5-DS5, BTS E10-DS5, BTS E15-DS5, BTS E20-DS5
1.4 Target group
This manual is intended for specialist electrical engineers who are
responsible for the installation and commissioning of the energy storage
system 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
BTS E5–E20-DS5 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 BTS E5–E20-DS5
2Basic safety information
NOTE
•The installation of the BTS battery system must be in full
compliance with national and local laws and regulations.
•SOFARSOLAR is not responsible for any personal injury or
property damage caused by improper use.
•If you have any questions or problems after reading the
following information, please contact SOFARSOLAR.
This section contains safety information that must be observed at all
times when working on or with batteries. To prevent personal injury or
property damage and to ensure long-term operation of the batteries, read
this section carefully and observe all safety information at all times.
2.1 Safety information
WARNING
•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, for the high voltage may cause
serious injury.
Read and understand the instructions within this manual and familiarise
yourself with the relevant safety symbols in this chapter before beginning
with the installation and commissioning of the device.

BASIC SAFETY INFORMATION
BTS E5–E20-DS5 9
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. 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 battery
system 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.
-the installer should have joined into the technical training from
Sofarsolar or our partners.
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 battery system according to the information contained
in the following sections. Install the battery system at a location where it
can be fixed and ensure that the inverter is upright. Choose a suitable

BASIC SAFETY INFORMATION
10 BTS E5–E20-DS5
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 environment. Air humidity should be less than 90% during
assembly.
2.1.3 Transport requirements
ATTENTION
•Battery modules must be placed in the original packaging or
other suitable packaging during transport to prevent any
damage.
•Please carry out a thorough inspection of the product. If you
find any packaging problems that may have caused damage
to the battery, or if you find any visible damage to the battery,
please inform the responsible shipping company immediately.
Contact your installer or SOFARSOLAR for help if necessary.
Products are in good electrical and physical condition when they are
shipped out from the factory. The factory packaging is specifically
designed to prevent transport damage, i.e. violent shocks, moisture and
vibrations. The device must not be installed if the packaging or the
product is visibly damaged.
The battery modules are classified as Class 9 dangerous goods
according to UN38.3 standards. Therefore, they must be loaded and
unloaded in accordance with the laws, regulations and industry
standards of the region in which they are transported. Rough handling

BASIC SAFETY INFORMATION
BTS E5–E20-DS5 11
may result in short-circuiting or damage to the batteries in the box, which
may lead to leakage, rupture, explosion or fire.
NOTE
Ensure any transport takes place in compliance with the following
standards:
•Sea transport must take place in full compliance with the
IMDG Code.
•Land transport must take place in full compliance with ADR
or JT/T617 transport requirements.
•Compliance with the regulatory requirements of the transport
authorities of the country of origin, route and destination of
the transport.
•Compliance with the IMDG Code and the regulatory
requirements of the respective national transport authorities.

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12 BTS E5–E20-DS5
2.1.4 Storage requirements
ATTENTION
Can cause damage to property if disregarded!
•Select a dry, tidy area that is well-ventilated.
•Ambient temperature range: -10°C to 45°C.
•Relative humidity: 5 to 70%.
•Place the battery module correctly, not upside down or on its
side.
•If the battery module has been stored for a long period of
time, recharge the power supply periodically. Battery module
power supply requirements: the charging current is less than
or equal to 7 A, and the battery module needs to be charged
to 50% SOC.
Please refer to chapter 8.2 for recharge requirements during storage.
2.1.5 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.
2.1.6 Electrical connection
Observe all applicable electrical regulations when working with the solar
inverter.
DANGER

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BTS E5–E20-DS5 13
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, SOFARSOLAR shall assume no guarantee.
2.1.7 Operation
DANGER

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14 BTS E5–E20-DS5
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.
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!
2.1.8 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.

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BTS E5–E20-DS5 15
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
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.

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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!
2.2.1 Symbols on the battery system
Several symbols pertaining to safety can be found on the battery system.
Please read and understand the content of these symbols before starting
the installation.
Battery distribution unit (BDU)
Symbol
Description
Beware of high voltage and electric shock.
Caution! Hot surface
Earthing point
Please read the manual before installing the battery
system

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Battery module
Symbol
Description
Residual voltage is present in the battery module!
Before carrying out any maintenance, you should
wait five minutes to ensure that the capacitor has
been fully discharged.
Beware of high voltage and electric shock.
Caution! Hot surface
Earthing point
Please read the manual before installing the battery
system

PRODUCT FEATURES
18 BTS E5–E20-DS5
3Product features
This chapter describes the product features, dimensions and efficiency
levels.
3.1 Product introduction
The BTS E5–E20-DS5 is an intelligent battery system composed of BTS
5K battery module(s) and a BTS 5K-BDU (battery distribution unit). The
system operates at high input and output DC voltage. Its modular and
stacked design enables a flexible configuration based on the user's
specific requirements. The storage capacity ranges from 5 to 40 kWh.
①
PV panels
②
Hybrid inverter
③
BTS E5…E20-DS5
④
Critical load
⑤
Normal load
⑥
Smart meter
⑦
Grid
⑧
Monitoring platform
1 2
3
4 5
6 7
8

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BTS E5–E20-DS5 19
The main features include:
•Fully modular design for easy installation and transport
•Balanced current between battery modules for higher available
battery capacity
•Expand storage capacity in stages, at any time
•Black start capability to startup the battery without a grid connection
•Low self-consumption of battery power
•User-friendly one-touch start/shutdown function
3.2 BTS battery system components
①
LED indicator
②
DC switch
③
Battery distribution unit
④
Battery module
⑤
Base
⑥
Start button
⑦
Heat sink

PRODUCT FEATURES
20 BTS E5–E20-DS5
Please refer to below explanation for a full understanding of the BTS
battery system naming:
•BTS: Product series name.
•E5/E10/E15/E20: Battery capacity (kWh).
•DS5: Battery module specification (BTS 5K).
3.3 Product dimensions
Please refer to the product dimensions in below table. The dimensions
for each setup is given, e.g. 1 battery module in combination with a BDU,
2 battery modules in combination with a BDU, etc.:
Number of
BTS 5K
Height (mm)
Width (mm)
Depth (mm)
1
680
708
170
2
1100
3
1520
3.4 Labelling on the device
Labelling must not be covered or removed!
Battery distribution unit