XOLTA BAT-5 User manual

Advanced energy storage systems
for solar system installations
BATTERY SYSTEM MANUAL
XOLTA COMPACT BAT-5 AND BAT-10
© 2021 by XOLTA

© 2021 by XOLTA 2
TABLE OF CONTENTS
1. Safety information and legal terms
1.1 Document purpose and structure ................................................................................................................. 3
1.2 Important safety Instructions ....................................................................................................................... 3
1.3 Actions in case of emergency situations ..................................................................................................... 4
1.4 XOLTA approved, authorized installers ........................................................................................................ 6
1.5 Safe disposal of lithium-ion batteries .......................................................................................................... 6
1.6 Disclaimer ...................................................................................................................................................... 6
1.7 Legal ............................................................................................................................................................... 6
1.8 Copyright ........................................................................................................................................................ 7
1.9 Voiding of warranty ....................................................................................................................................... 7
1.10 Abbreviations ................................................................................................................................................. 7
2. Introduction
2.1 About the XOLTA Compact BAT-5 and BAT-10 ............................................................................................. 8
 2.2 XOLTACompactBESSbenets .................................................................................................................... 8
2.3 Maximizing consumption of solar power .................................................................................................... 8
2.4 Modularity and scalability of XOLTA BAT-5 and XOLTA BAT-10 .................................................................. 9
 2.5 Keyspecications ....................................................................................................................................... 10
3. XOLTA Battery Energy Storage System
3.1 Main features ............................................................................................................................................... 11
3.2 Hardware description .................................................................................................................................. 12
3.3 Software description ................................................................................................................................... 13
4. System installation and operation
4.1 Delivery inspection ...................................................................................................................................... 14
4.2 Location requirements ................................................................................................................................ 14
4.3 Installation procedure ................................................................................................................................. 14
4.4 System operation ......................................................................................................................................... 16
4.5 Maintenance requirements ......................................................................................................................... 16
4.6 Lifetime and system reliability .................................................................................................................... 16
4.7 Installation and commissioning ................................................................................................................. 16
5. Registering for the XOLTA Web App
5.1 Register User and Device ............................................................................................................................ 17

© 2021 by XOLTA 3
1.1 Document purpose and structure
The purpose of this manual is to provide users and installers of the XOLTA BAT-5 and BAT-10 Compact Battery
Energy Storage System (BESS) with an overview of system installation, functionality, and operation. Through
out this manual, the product is referred to as XOLTA Compact BESS or XOLTA BESS.
The document is organized as follows:
Chapter 1 sets out important safety information, what to do in emergency situations, and legal information.
Chapter 2 gives a brief introduction to the XOLTA BESS system and key specication parameters.
Chapter 3 describes the main features of the XOLTA Compact Bess system and gives an overview of the hardware.
Chapter 4 deals with system installation and operation.
Chapter 5 describes how to access the XOLTA Web App to monitor the XOLTA Compact BESS online.
1.2 Important safety instructions
The XOLTA Compact BESS installation and servicing should only be performed by XOLTA certied installers.
As a consequence, XOLTA holds no liability for property damage or injury caused by system modications
or repairs undertaken by unqualied personnel or due to failure to follow the following important safety
instructions.
The safety instructions have been divided into:
WARNING - indicates a dangerous situation which, if not avoided, could result in injury or death.
CAUTION - indicates a situation where damage to the equipment or injury may occur.
IMPORTANT SAFETY INSTRUCTIONS
Read the entire document carefully before installing or using the XOLTA Compact BESS.
RISK OF EXPLOSION:
Do not apply any external force to the XOLTA Compact BESS.
Avoid physical damage to the battery. Keep the XOLTA Compact BESS away from where it may accidentally
be physically damaged, such as close to where a car is to be parked in a garage.
Do not dispose of the XOLTA Compact BESS in re.
RISK OF FIRE:
Keep the system away from ammable objects and heat sources. Avoid installation in places prone to direct
sunlight.
Do not expose the battery system to temperatures more than 50°C.
RISK OF ELECTRICAL SHOCK:
There are high voltages present on AC and DC cables. There is a risk of serious injury or death due to electrical
shock. Do not remove the cover. Report any external cable/wire damage to XOLTA or your local XOLTA system
installer. Do not touch uninsulated wires.
1 SAFETY INFORMATION AND LEGAL TERMS:

© 2021 by XOLTA 4
Never use a system if it is defective, damaged or broken.
Never attempt to disassemble, repair, modify the product or use it in any way other than as described in this
manual. Repairs or replacement of components must only be performed by a XOLTA certied technician.
Never immerse the XOLTA Compact BESS in water or other uids.
RISK OF DAMAGE:
Do not expose the battery system to temperatures below -25°C or more than 50°C (30°C during operation)
Do not place any objects on top of or underneath the XOLTA Compact BESS. This might lead to improper
product operation or problems with thermal management.
Never use any aggressive solvents or chemicals to clean the XOLTA Compact BESS. The product cover
should only be cleaned with soap and water or regular household dishwashing detergent (not automatic
dishwasher detergent).
OTHER PRECAUTIONS:
The product should not be used for any purpose other than that described in this manual.
The product should not be installed in combination with third party storage products.
Unpleasant smells or odors may indicate electrolyte leakage from the battery cell(s). If you notice such an
odor, switch the system off immediately at the electrical panel and contact XOLTA. If installed indoors,
ventilate the room and avoid inhaling the odor.
The XOLTA Compact BESS is heavy. Suitable lifting equipment is strongly recommended.
Do not paint any part of the product.
Do not open the battery modules.
For long term storage (longer than 1 month), the battery should be charged to 40% charge and then disconnected
from the grid.
When the product is to be disposed of, follow all relevant local laws and regulations.
NOTE! Failure to comply with the conditions of the warranty and the information specied in this document invalidates
any warranty claims.
1.3 ACTIONS to take in emergency situations
The XOLTA Compact BESS is designed to be very safe. It monitors essential parameters of the battery system
and protects the battery from damage. The main battery safety measures are shown in Table 1.1 below.
Table 1.1:
List of main safety
features in XOLTA
Compact BESS
State of the art battery cells with excellent safety performance (LFP technology)
State of the art battery management system (BMS) ensuring over/under voltage and
over/under temperature monitoring for each individual battery cell
Battery cut-off relay controlled by the BMS
Temperature sensors monitoring battery system temperature
Active battery current control depending on battery cell temperature, voltage and state
of charge (SoC)
System diagnostics, error handling and automatic grid connection/disconnection
controlled by the site controller
Battery air humidity monitoring and prevention system
AC fuse and battery DC protective fuse

© 2021 by XOLTA 5
Despite all these built-in safety measures, emergency situations can still occur. In such emergencies, the
actions to take are as follows:
LEAKAGE
Toxic electrolyte leaking from the battery pack. Electrolyte is corrosive and odorous
ACTION
• Avoid any contact with the leaking liquid or gas.
– In case of electrolyte inhalation – seek immediate medical help.
– In case of electrolyte coming into contact with skin - wash thoroughly with water and soap and seek
medical help.
– In case of electrolyte coming into contact with eyes - rinse eyes with water for 15 minutes and seek
medical help.
– In case of electrolyte ingestion / swallowing - force vomiting and seek immediate medical help.
• If installed inside:
- Leave the room and do not re-enter it.
- Ventilate the room if possible.
• Contact XOLTA.
FIRE
Fire may occur as a consequence of physical damage or external sources of heat and re. Hazardous
fumes such as carbon dioxide, carbon monoxide and hydrocarbons are emitted during battery res.
ACTION
• Disconnect the power from the battery system at the electrical panel (if possible without getting too close
to the battery and without inhaling fumes).
• Never try to extinguish a battery re yourself. If battery cells catch re, only qualied reghting personnel
with appropriate protective equipment should attempt to extinguish the re. Keep away from battery res
and contact emergency reghters.
• If components other than battery cells catch re, then ABC or carbon dioxide extinguishers can be used
to extinguish the re.
• Keep away from the battery and contact XOLTA.
IMMERSION IN WATER
Immersing the XOLTA Compact BESS in water risks causing a short-circuit and damage to the battery system.
ACTION
• Do not try to access the XOLTA Compact BESS.
• Disconnect the power (if possible without coming close to the battery).
• Never use a ooded battery system again – the system must be decommissioned.
• Keep away from the battery and contact XOLTA.

© 2021 by XOLTA 6
DAMAGED BATTERY
Any sign of physical damage or abnormal behavior of the battery system (or its peripheral components)
should be treated with extreme caution.
ACTION
• Disconnect the power.
• Keep away from the battery and contact XOLTA.
• Never use the damaged battery system again.
1.4 XOLTA approved, authorized installers
XOLTA provides appropriate training to installation technicians for XOLTA systems.
The XOLTA Compact BESS must only be installed and commissioned by a XOLTA approved installer.
1.5 Safe disposal of Lithium-ion batteries
Li-ion batteries must be treated as hazardous waste and not be disposed of with regular household waste.
For safe disposal of an unusable XOLTA battery it can be delivered back to the manufacturer or importer
that originally sold the battery or to the dealer of a new industrial battery.
1.6 Disclaimer
We have taken every precaution to ensure that all information provided in this manual is correct and up
to date. However, to the extent permitted under the applicable laws, we assume no responsibility for damage
to persons and property arising as a result of following recommendations and/or procedures described in
this manual. Furthermore, we assume no responsibility for any infringements of rights of third parties which
may result from the use of this manual.
Product modications or changes to the product environment:
• Only use the storage system in its original state - without any unauthorized modications - and when it is
in proper working order.
• Safety devices must never be overridden, blocked or tampered with.
• The interfaces of the storage system must be wired in accordance with the product documentation.
• An appropriate and readily accessible disconnect device shall be incorporated in the xed wiring.
• All repairs on the storage system must be performed by authorized service technicians only.
• The replacement of battery modules must be undertaken by authorized service technicians only. When
replacing batteries, replacement must be with the same type and number of batteries or battery modules.
1.7 Legal
The system has been designed to ensure that an installed BAT-5 or BAT-10 and all its associated functionalities
behave safely under the predened operating conditions. However, please read all sections about safety and
precautions carefully before installation, operation, or undertaking service work on a XOLTA BESS. Failure
to do so could result in reduced system performance, damage to the system, personal injury or even death.

© 2021 by XOLTA 7
1.8 Copyright
This document and all information contained in the XOLTA System Manual are protected Copyright 2020 by
Lithium Balance A/S. All rights reserved. Lithium Balance reserves the right to make changes to the products
described in this manual at any time without further notice. This manual may be photocopied or otherwise
distributed only to the extent that this is strictly necessary for the correct operation and installation of a
XOLTA Compact BESS.
1.9 Voiding of warranty
XOLTA does not assume any direct or indirect liability for any damage or loss caused if:
• The Covered Products are not continuously connected to the internet via LAN cable whereby XOLTA cannot
monitor the performance of the Covered Products;
• The Covered Product has not been stored, transported, set up or installed in an appropriate and professional
manner, in accordance with technical standards and regulations, in accordance with the respective installation
manual of the Covered Products or in accordance with instructions of XOLTA;
• The Covered Product has been operated contrary to their intended use or contrary to the instructions in
the respective installation manual for the Covered Product;
• The Covered Products were constantly out of service due to Purchaser for a period of more than six months
after the initial installation;
• The Covered Product has not been serviced properly and professionally or according to technical standards
or the maintenance instructions of Covered Product;
• The Covered Product has been exposed, even temporarily, to vibrations that not only insignicantly exceed
the usual extent of vibrations caused by transport and installation;
• The Covered Product has been improperly altered or otherwise tampered with by the person entitled to
the Warranty or third parties;
• An overvoltage has occurred in the power grid to which the Covered Products are connected;
• The Covered Product have been exposed to force majeure (in particular lightning, re, earthquakes, natural
disasters) or harmful environmental conditions such as air pollution, salt water or sulphur corrosion;
NOTE! Always refer to the Terms and Conditions document delivered by XOLTA for warranty conditions.
1.10 Abbreviations
Table 1.2:
List of abbreviations
used in this XOLTA
Compact BESS
manual
BESS Battery Energy Storage System
BMS Battery Management System
BoL Beginning of Life
BPU Battery Protection Unit - a unit containing switches and fuses for battery protection
DoD Depth of Discharge
EoL End of Life
GUI Graphical User Interface
MODBUS Serial communication protocol developed by Modicon
PV Photovoltaic
SoC State-of-Charge
TCO Total Cost of Ownership

© 2021 by XOLTA 8
2 INTRODUCTION:
2.1 About the XOLTA Compact BAT-5 and BAT-10
The BAT-5 and BAT-10 are Battery Energy Storage Systems (BESS) for residential or commercial use. With
nominal capacities of 5 and 10 kWh (usable 4.5 and 9kWh) respectively the batteries can be used with
smaller solar / photovoltaic (PV) installations. The batteries consist of lithium iron phosphate (LFP) based
lithium-ion battery cells as well as an integrated battery inverter.
The XOLTA Compact BESS is an AC-coupled battery designed for connection to single or three phase 230V
AC 50Hz electrical grids. It is designed to store electricity generated from solar panels in the lithium-Ion
battery and later convert stored energy back to alternating current (AC) electricity and feed this into the
power grid.
The all-in-one batteries work with any kind of solar installation or any other renewable energy source and
are connected directly to the electrical panel of the building. They are designed for both indoor and outdoor
installation and to withstand cold and heat.
The batteries come with 24/7/365 monitoring to ensure optimal performance. Production and consumption
gures and savings per day/month/year/lifetime can be seen in the XOLTA web app.
2.2XOLTACompactBESSbenets
The XOLTA BAT-5 XOLTA BAT-5 and BAT-10 are scalable battery energy storage systems designed for
residential and commercial use. The batteries are an essential enabler for the transition to renewable energy by
balancing out volatile energy production with consumption. The high energy density means little space is
required on an outside wall to store sufcient electricity to power building consumption during peak tariff hours.
High performance is assured by 24/7 monitoring via an Internet connection which allows external data such
as weather forecasts and anticipated demand for electricity to be used to optimize performance. The battery
systems connect to XOLTA’s intelligent cloud service and can be monitored using a web app (see Chapter 5).
2.3 Maximizing consumption of solar power
Solar power is often generated at different times of the day from when power is required. XOLTA batteries
store the excess solar energy generated during the daytime and release it again later when it is needed – for
example after sunset.
Put simply, there are two scenarios:
1.When your solar panels are generating enough electricity for your own needs, or more than you need at
that moment in time:
a. Solar power goes to your immediate own consumption.
b. Any excess solar power which you do not use is stored in the battery.
c. Once the battery is full, you can sell solar power to the grid.
2.When your solar panels are not generating enough electricity for your own needs:
a. The system draws power previously stored in the battery.
b. If the battery becomes empty, the system draws power from the grid.
This is called time-shifting – where you store excess electricity for later use. See gure 2.1.

© 2021 by XOLTA 9
Figure 2.1:
Illustration of
maximizing self-
consumption in the
most optimal situation
2.4 Modularity and scalability of XOLTA BAT-5 and XOLTA BAT-10
XOLTA BAT-5 and XOLTA BAT-10 can be connected in parallel on the AC side to meet higher battery power
and/or energy requirements. The parallel connection also enhances system reliability and availability.
In the parallel operation, the following scenario is possible:
• XOLTA BAT-5 and/or XOLTA BAT-10 systems work as one unit by equally sharing charge/discharge power;
Up to 3 XOLTA BAT-5 or up to 3 XOLTA BAT-10 battery systems can be connected on the AC side (both on
the same grid phase or the different grid phases). The resulting battery power and energy capability are
presented in Table 2.1 (XOLTA BAT-5) and in Table 2.2 ( XOLTA BAT-10).
Table 2.1: Battery
power and energy for
a different number
of parallel-connected
XOLTA BAT-5 battery
systems.
Table 2.2: Battery
power and energy for
a different number
of parallel-connected
XOLTA BAT-10
battery systems.
E
nergy shi
f
ted by batter
y
Even
i
n
g
N
oonMorn
i
n
g
T
im
e
S
hi
ft
S
olar production
Consum
p
t
i
on
BAT-5 UNITS 123
Nominal effect (kW) 3.6 7.2 10.8
Nominal energy (kWh) 5 10 15
Usable energy (kWh) 4.5 9 13.5
Connection 1P+N+E 2P+N+E 3P+N+E
BAT-10 UNITS 123
Nominal effect (kW) 3.6 7.2 10.8
Nominal energy (kWh) 10 20 30
Usable energy (kWh) 9 18 27
Connection 1P+N+E 2P+N+E 3P+N+E

© 2021 by XOLTA 10
2.5Keyspecications
Key specications of the XOLTA Compact BESS are shown in the following tables.
Key specications
for BAT-5
Key specications
for BAT-10
TECHNICAL PROPERTIES 1 BATTERY
Capacity 5 kWh
Grid connection voltage 1 x 230V AC
Ambient temperature rating -20°C to 35°C
Cabinet design Various color and material choices
Dimensions H:772mm x W:664.5mm x D:259.5 mm
Weight 70 kg
Enclosure protection rating IP55
Expected lifetime 15 years
Warranty* 10 years
Mounting Indoors/outdoors - wall mounted/freestanding
Self consumption (standby) <10W
Meetering concept 3-fase Modbus or TCP/IP
Island mode From 2022
Cell technology Li-ion LFP / Nominal voltage 48V
Low Voltage Directive (LVD) 2014/35/EU and
Electromagnetic Compatibility (EMC) 2014/30/EU
Standards UN38.3 classication for safe transportation
EN 61010-1: 2010 + A1: 2016, IEC 62619: 2017
EN 61000-6-2, Industrial level, EN 61000-6-4, Class A
* Region dependent and subject to service agreement
TECHNICAL PROPERTIES 1 BATTERY
Capacity 10 kWh
Grid connection voltage 1 x 230V AC
Ambient temperature rating -20°C to 35°C
Cabinet design Various color and material choices
Dimensions H:772mm x W:664.5mm x D:259.5 mm
Weight 105 kg
Enclosure protection rating IP55
Expected lifetime 15 years
Warranty* 10 years
Mounting Indoors/outdoors - wall mounted/freestanding
Self consumption (standby) <10W
Meetering concept 3-fase Modbus or TCP/IP
Island mode From 2022
Cell technology Li-ion LFP / Nominal voltage 48V
Low Voltage Directive (LVD) 2014/35/EU and
Electromagnetic Compatibility (EMC) 2014/30/EU
Standards UN38.3 classication for safe transportation
EN 61010-1: 2010 + A1: 2016, IEC 62619: 2017
EN 61000-6-2, Industrial level, EN 61000-6-4, Class A
* Region dependent and subject to service agreement