Mastervolt MLI-E 12/1200 Operating manual

Lithium-ion Battery
MLI-E 12/1200
USER AND INSTALLATION MANUAL
10000013074_03

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MLI-E 12/1200 –User and Installation Manual
DELIVERY CONTENTS
1. (1x) MLI-E 12/1200 Battery
2. (1x) Tool (combined 2.5mm/6mm Allen hex key)
3. (2x) Hex bolt M8 x 16mm
4. (2x) Bolt M8 x 20mm
5. (4x) Spring washer M8
6. (2x) Plain washer M8
7. (1x) Removable automotive battery pole positive
8. (1x) Removable automotive batty pole negative
9. (2x) Removable handles
10. (1x) USB drive with manual
The MLI-E 12/1200 is part of the Mastervolt MLI series of Lithium Ion batteries. These batteries are
equipped with an integrated cell management system which features:
•Cell balancing
•Battery voltage monitoring
•Battery current monitoring
•Pre warning when battery is almost empty
•Battery temperature monitoring (integrated temperature sensor)
•Communication with other devices like chargers and alternators
Figure 1: Delivery contents

MLI-E 12/1200 –User and Installation Manual
3
TABLE OF CONTENTS
DELIVERY CONTENTS.............................................................................................................................................................. 2
1SAFETY GUIDELINES AND MEASURES ......................................................................................................................... 4
1.1 General rules........................................................................................................................................................... 4
1.2 Transportation warnings .......................................................................................................................................... 4
1.3 Correct disposal of this product ............................................................................................................................... 4
2GENERAL INFORMATION ................................................................................................................................................ 5
2.1 Use of this manual................................................................................................................................................... 5
2.2 Disclaimer................................................................................................................................................................ 5
2.3 Warranty specifications............................................................................................................................................ 5
2.4 Liability..................................................................................................................................................................... 5
2.5 Identification label.................................................................................................................................................... 5
2.6 Use for intended purpose ........................................................................................................................................ 5
2.7 Organizational measures......................................................................................................................................... 5
2.8 Maintenance and repair........................................................................................................................................... 6
2.9 General safety and installation precautions............................................................................................................. 6
2.10 Warning regarding life support applications............................................................................................................. 6
3OPERATION....................................................................................................................................................................... 7
3.1 Charging and discharging........................................................................................................................................ 7
3.2 Cell management system ........................................................................................................................................ 7
3.3 Safety features......................................................................................................................................................... 7
3.4 MasterBus functionality............................................................................................................................................ 7
3.5 Connections and battery controls ............................................................................................................................ 7
3.6 LED indicators ......................................................................................................................................................... 8
3.7 Operation modes..................................................................................................................................................... 8
4INSTALLATION.................................................................................................................................................................. 9
4.1 Unpacking................................................................................................................................................................ 9
4.2 Required tools.......................................................................................................................................................... 9
4.3 Location to install..................................................................................................................................................... 9
4.4 General installation guidelines................................................................................................................................. 9
4.5 Connecting power cables with automotive type terminals ....................................................................................... 9
4.6 Connecting shrink fit type of power cables .............................................................................................................10
4.7 Connecting power cables with automotive type terminals and placing protective caps..........................................11
4.8 Set battery in normal operation mode.....................................................................................................................12
4.9 Charger settings .....................................................................................................................................................12
4.10 Fuse to cable size...................................................................................................................................................12
4.11 Battery balancing....................................................................................................................................................12
4.12 Commissioning.......................................................................................................................................................12
5COMMUNICATION........................................................................................................................................................... 13
5.1 Bluetooth app..........................................................................................................................................................13
5.2 Basic NMEA Components and how to use them....................................................................................................14
5.2.1 Adding additional NMEA 2000 devices....................................................................................................... 14
5.2.2 NMEA 2000 Network limits......................................................................................................................... 14
5.3 What is MasterBus?................................................................................................................................................14
5.3.1 How to set up a MasterBus network ........................................................................................................... 14
5.3.2 Monitor and configure the MLI-E with MasterBus....................................................................................... 14
6TROUBLE SHOOTING..................................................................................................................................................... 16
7MAINTENANCE, DECOMMISSIONING AND STORAGE................................................................................................ 17
7.1 Maintenance...........................................................................................................................................................17
7.2 Taking out of operation...........................................................................................................................................17
7.3 Battery replacement................................................................................................................................................17
7.4 Storage...................................................................................................................................................................17
8TECHNICAL INFORMATION ........................................................................................................................................... 18
8.1 Specifications..........................................................................................................................................................18
8.2 Dimensions.............................................................................................................................................................19

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MLI-E 12/1200 –User and Installation Manual
1 SAFETY GUIDELINES AND MEASURES
1.1 General rules
Observe these instructions and keep them
located near the MLI-E for future reference.
Work on the Li-ion Battery should be carried
out by qualified personnel only.
While working on the Li-ion Battery wear
protective eye-glasses and clothing.
Any uncovered battery material such as
electrolyte or powder on the skin or in the
eyes must be flushed with plenty of clean
water immediately. Then seek medical
assistance. Spillages on clothing should be
rinsed out with water.
Explosion and fire hazard. Terminals of the
Li-ion Battery are always alive; therefore do
not place items or tools on the Li-ion
Battery. Avoid short circuits, too deep
discharges and too high charge currents.
Use insulated tools. Do not wear any
metallic items such as watches, bracelets,
et cetera. In case of fire, you must use a
type D, foam or CO2 fire extinguisher.
Never try to open or dismantle the Li-ion
Battery. Electrolyte is very corrosive. In
normal working conditions contact with the
electrolyte is impossible. If the battery
casing is damaged do not touch the
exposed electrolyte or powder because it is
corrosive.
Li-ion Batteries are heavy. If involved in an
accident they can become a projectile!
Ensure adequate and secure mounting and
always use suitable handling equipment for
transportation. Handle with care because Li-
ion Batteries are sensitive to mechanical
shock.
Li-ion batteries can be charged with a
voltage up to 14.6 V. On the other hand, Li-
ion batteries can be discharged down to
11.0 V. Note that this voltage range (11.0-
14.6V) is larger than you may expect from
other battery types such as lead-acid
batteries. Be aware that these voltages may
exceed the permitted voltages of the
connected load(s). Therefore appropriate
measures must be taken to avoid damage
to the connected load(s).
If charged after the Li-ion battery was
discharged below the Discharge cut-off
voltage, or when the Li-ion battery is
damaged or overcharged, the Li-ion battery
can release a harmful mixture of gasses
such as phosphate.
Non-compliance with operating instructions, repairs
made with other than original parts, or repairs made
without authorization render the warranty void.
1.2 Transportation warnings
The Li-ion battery must be transported in its
original or equivalent package and in an upright
position.
If the battery is in its package, use soft slings to
avoid damage.
Do not stand below a Li-ion battery when it is
hoisted.
Never lift the battery at the terminals, only lift
the battery at the handles.
Batteries are tested according to UN Handbook of Tests
and Criteria, part III, sub section 38.3
(ST/SG/AC.10/11/Rev.5).
For transport the batteries belong to the category UN3480,
Class 9, Packaging Group II and have to be transported
according to this regulation. This means that for land and
sea transport (ADR, RID & IMDG) they have to be packed
according to packaging instruction P903 and for air
transport (IATA) according to packaging instruction P965.
The original packaging satisfies these instructions.
1.3 Correct disposal of this product
This product is designed and manufactured with high
quality materials and components, which can be recycled
and reused. Batteries marked with the recycling symbol
must be processed via a recognized recycling agency. By
agreement, they may be returned to the manufacturer.
Batteries must not be mixed with domestic or industrial
waste.
Figure 2: Disposal and recycling symbols
Please be informed about the local separate collection
system for electrical and electronic products. Please act
according to your local rules and do not dispose of your
old products with your normal household waste. The
correct disposal of your old product will help prevent
potential negative consequences to the environment and
human health.
non-spillable

MLI-E 12/1200 –User and Installation Manual
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2 GENERAL INFORMATION
2.1 Use of this manual
This manual serves as a guideline for the safe and
effective installation, operation and maintenance of the
Mastervolt MLI-E series of lithium ion batteries further
mentioned as “Li-ion Battery” or “Li-ion Batteries”. It is
therefore obligatory that every person who works on or
with the Li-ion Battery is completely familiar with the
contents of this manual, and that he/she carefully follows
the instructions contained herein.
Installation of, and work on the Li-ion Battery, may only be
carried out by qualified, authorized and trained personnel,
consistent with the locally applicable standards and taking
into consideration the safety guidelines and measures
(chapter 1 of this manual). Keep this manual at a secure
place!
All of the specifications, provisions and instructions
contained in this manual apply solely to the following
products:
Part number
Description
66011200
Li-ion Battery MLI-E 12/1200
2.2 Disclaimer
Our products are subject to continual development and
improvement. Therefore, additions or modifications to the
products may cause changes to the technical data and
functional specifications. No rights can be derived from
this document. Please consult our most current Terms &
Conditions of Sale.
2.3 Warranty specifications
Mastervolt guarantees that the Li-ion Battery has been
built according to the legally applicable standards and
specifications. Acting not conform instructions and
specifications contained in this manual, may damage the
battery or it may not fulfill its specifications. All of these
matters mean that the warranty becomes invalid.
The warranty is limited to the costs of repair and/or
replacement of the product. Costs for installation labor or
shipping of the defective parts are not covered by this
warranty. Battery damage as a result of over and
undercharging is not compensated. You must take
measures to disconnect the Li-ion battery based on
(MasterBus) generated alarms by this battery, otherwise
warranty becomes invalid. Use of a battery controlled
external safety relay is obligatory (refer to chapter 4). The
correct functioning of this product is subject to warranty.
The period and conditions of this warranty are laid down in
Mastervolt Warranty Terms and Conditions which can be
downloaded from www.mastervolt.com/support.
2.4 Liability
Mastervolt accepts no liability for:
•Consequential damage due to use of the Li-ion
Battery;
•Possible errors in the manuals and their results.
•Use that is inconsistent with the purpose of the
product.
2.5 Identification label
The identification label is located at the top side of the Li-
ion Battery, next to the grip handle (see Figure 3).
Important information required for service or maintenance
can be derived from the identification label.
CAUTION!
Never remove the identification label.
2.6 Use for intended purpose
The Li-ion Battery is constructed as per the applicable
safety-technical guidelines.
Use the Li-ion Battery only:
•in a technical correct condition;
•in a closed, well-ventilated area, protected against
rain, moist, dust and condensation;
•observing the instructions and specifications in this
manual.
WARNING
Never use the Li-ion Battery at locations
where there is danger of gas or dust explosion
or potentially flammable products!
Use of the Li-ion Battery other than mentioned in point 2 is
not considered to be consistent with the intended purpose.
Mastervolt is not liable for any damage resulting from the
above.
2.7 Organizational measures
The user must always:
•have access to the user manual;
•be familiar with the contents of this manual. This
applies in particular to chapter Safety Guidelines and
Measures.
Figure 3: Identification label

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MLI-E 12/1200 –User and Installation Manual
2.8 Maintenance and repair
If the electrical installation is switched off during
maintenance and/or repair activities, it should be secured
against unexpected and unintentional switching on:
•switch off all charging systems;
•switch off the connection with the batteries;
•be sure that third parties cannot reverse the measures
taken.
If maintenance and repairs are required, only use original
spare parts.
2.9 General safety and installation precautions
•Do not expose the Li-ion Battery to rain, snow, spray,
moisture, excessive pollution and condensing circum-
stances. Do not install the Li-ion Battery in a non-
ventilated area, overheating may result.
•Short circuiting or reversing polarity will lead to
serious damage to the Li-ion Battery, equipment
connected to the Li-ion Battery and the wiring. Fuses
between batteries and equipment cannot prevent
damage caused by reversed polarity and the warranty
will be void.
•Protect the wiring with fuses, according to the local
standards.
•Connection and protection must be done in
accordance with local standards.
•Do not work on the Li-ion Battery or system if it is still
connected to a power source. Only allow changes in
your electrical system to be carried out by qualified
electricians.
•Check the wiring at least once a year. Defects such
as loose connections, burned cables etc. must be
corrected immediately.
2.10 Warning regarding life support applications
Mastervolt products are not designed to be used as
component of medical equipment, unless negotiated in the
form of a written agreement between customer and/or
manufacturer and Mastervolt. Such agreement will require
the equipment manufacturer either to contract additional
reliability testing of the Mastervolt parts and/or to commit
to undertake such testing as a part of the manufacturing
process. In addition the manufacturer must agree to
indemnify and not hold Mastervolt responsible for any
claims arising from the use of the Mastervolt parts in the
life support equipment.

MLI-E 12/1200 –User and Installation Manual
7
3 OPERATION
3.1 Charging and discharging
Use the MLI-E within the specifications as stated in section
8.1.
3.2 Cell management system
The MLI-E consists of a pack of battery cells. As with all
kind of batteries, there is always some kind of unbalance
present between the individual cells. During charging of an
unbalanced battery pack, one or more cells will reach the
maximum state of charge before the other cells. During
discharge the cells that are not fully charged will be
depleted prior to the other cells, causing early
undervoltage shutdown of the pack. Normally spoken,
these early charge and discharge limits reduce the usable
capacity of the battery and will shorten the expected
lifetime of the pack. To avoid this kind of premature failure,
the MLI-E is provided with a Cell Management System
(BMS). With this system, each cell is conditioned
individually.
Features of the Cell Management System:
•Balancing between the different cells. Normally, cells
in a series string receive identical currents. With the
Cell Management System current from stronger cells
will be transferred to the weaker cells during the
charging/ discharging process and idle mode;
•Protection of each separate cell from under- and over-
charging by voltage monitoring of each individual cell;
•Prevention of too deep battery discharges;
•Monitoring of temperature. Each separate cell as well
as the external temperature of the battery pack is
being monitored;
•Communication with Mastervolt charge devices to
maximize safety and performance;
•Pre warnings when the state of charge is becoming
low.
WARNING
Before using the MLI-E, it must be installed
and commissioned in accordance with the
instructions stated in chapter 4 of this manual!
3.3 Safety features
Under- and over-charging and excessive temperatures
may lead to permanent damage to the MLI-E and even to
dangerous situations. Therefore the Li-ion battery is
provided with several advanced safety features.
WARNING
Alarms and warnings generated by the MLI-E
should not be neglected. It is the user’s
responsibility to take adequate measures.
There are two levels of protection:
•Warning: The yellow LED of the MLI-E will be lit.
•Alarm: The red LED of the MLI-E will be lit. This is an
“emergency stop” of the battery. The battery will
disconnect itself from the system.
3.4 MasterBus functionality
Refer to chapter 1 for advanced MasterBus functionality.
The Li-ion battery is not able to power the MasterBus
network. A proper amount of powering devices should be
placed in the MasterBus network.
CAUTION!
Make sure to place the MLI-E batteries on the
end of a MasterBus network.
3.5 Connections and battery controls
Figure 4: Connections and battery controls
Port/connection
Description
J1
RJ45 (CAN1)
J2
Inputs 4-pins
J3
Monitor 6-pins
J4
Outputs 8-pins
J5
RJ45 (CAN2)
S1
Red push button
S2
Configuration switches
X1
Battery negative (−) terminal
X2
Battery positive (+) terminal

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MLI-E 12/1200 –User and Installation Manual
3.6 LED indicators
Figure 5: LED positions
3.7 Operation modes
•Empty mode; battery voltage is below 10V.
•Deep discharge mode; battery voltage is below 6V.
The MLI-E is not usable anymore.
•Storage mode; the MLI-E was set to storage mode
manually. In storage mode it uses no power. This
prevents the MLI-E from draining its charge during
winter for example.
•Alarm mode; the BMS detects either an internal or
external failure. If a critical alarm occurs during
operation mode, the mode management function goes
to alarm mode.
•Operation mode; the MLI-E is fully operational. No
error is detected.
•Warning mode; the MLI-E parameters are out of
specified limit(s).
D1
(Green)
D2
(Yellow)
D3
(Red)
Operating mode
Protective disconnect
device
Communication
BMS
Off
Off
Off
Empty/Deep discharge/
Storage mode
Open
No
Inactive
Off
Off
On
Alarm mode
Open
Yes
Active
On
Off
Off
Operation mode
Closed
Yes
Active
Off
On
Off
Warning mode
Closed
Yes
Active
When the battery is not charging or discharging, the green LED will blink.
Before the battery goes to Empty/Deep discharge/Storage mode, the green and the red LEDs will blink 3 times.

MLI-E 12/1200 –User and Installation Manual
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4 INSTALLATION
During installation and commissioning of the Li-
ion battery, the Safety Guidelines & Measures
are applicable at all times. See chapter 1 of this
manual.
4.1 Unpacking
After unpacking, check the contents for possible damage.
Check the open clamp voltage with a suitable voltage
meter. It should be in the range 11.0 to 14.5V. Do not use
the product if it is damaged or if the open clamp voltage is
out of range. If in doubt, contact your supplier.
4.2 Required tools
•Hexagon socket wrench 13mm (M8 bolt) to connect
the battery cables to the Li-ion battery (torque: see
section 4.4)
•Tools to install the wiring.
4.3 Location to install
•Place the battery in a sufficiently ventilated room
•Keep the Li-ion battery away from heat sources. See
specifications for allowed operating temperatures.
•Keep the Li-ion battery away from moist.
•Keep at least 1 cm between two Li-ion batteries for air
flow.
•The Li-ion battery must be secured to its foundation,
use appropriate LN5 fastening brackets.
4.4 General installation guidelines
•Switch off all loads and chargers before starting
installation.
•Use properly sized and reliable, cables, cable lugs
and battery terminals. Tighten all connections. For the
main DC connections use 13 Nm torque. Do not over
torque as this will damage the Li-ion Battery beyond
repair.
•Unused wiring should be insulated properly to avoid
accidental contact.
•Connect the battery with the correct polarity to the
charger and load(s) (positive pole to positive
terminal). Note that the position of the battery poles
may differ from previously installed batteries! In
installations with a negative earth, connect the
negative cable last of all to prevent short circuiting.
•After connecting the battery cable, close the
protection lids (grip handles of the Li-ion battery) to
prevent incidental touching of the terminals.
WARNING
Use properly sized fuses and wiring to prevent
hazardous situations.
4.5 Connecting power cables with automotive type
terminals
1. Connect the positive wire of the load or charger to the
positive (+) terminal of the battery, see Figure 6.
CAUTION
Do not connect the negative (−) terminal first
as this may lead to short circuits.
2. Connect the negative wire of the load or charger to
the negative (−) terminal of the battery, see Figure 6.
3. Ensure both contacts are firmly tightened.
4. Place the handle covers over the terminals.
Figure 6: Connect the X1 (-) and X2 (+) terminal of the battery (automotive terminals)

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MLI-E 12/1200 –User and Installation Manual
4.6 Connecting shrink fit type of power cables
1. Remove the automotive power terminals, see Figure
7.
2. Connect the positive wire of the load or charger to the
positive (+) terminal of the battery, see Figure 8. Use
the included M8 bolt, spring washer and plain washer
to connect the battery cable.
CAUTION
Do not connect the negative (−) terminal first
as this may lead to short circuits.
3. Connect the negative wire to the negative (−) terminal
of the battery, see Figure 8Error! Reference source n
ot found.. Use the included M8 bolt, spring washer
and plain washer to connect the battery cable.
4. Ensure both contacts are tightened to 13Nm.
5. Place the handle covers over the terminals.
Figure 7: Remove automotive power terminals
Figure 8: Connect the X1 (-) and X2 (+) terminal of the battery (shrink fit)

MLI-E 12/1200 –User and Installation Manual
11
4.7 Connecting power cables with automotive type
terminals and placing protective caps
1. Remove the handle covers, see Figure 9.
a. Lift the handles 30°.
b. Remove the handles by pulling them outwards.
2. Connect the positive wire of the load or charger to the
positive (+) terminal of the battery, see Figure 10.
CAUTION
Do not connect the negative (−) terminal first
as this may lead to short circuits.
3. Connect the negative wire of the load or charger to
the negative (−) terminal of the battery, see Figure 10.
4. Ensure both contacts are firmly tightened.
5. Place the accessory caps over the terminals, see
Figure 11.
Figure 9: Remove the handle covers
Figure 10: Connect the X1 (-) and X2 (+) terminal of the battery (automotive terminals and caps)
Figure 11: Place the accessory caps over the terminals

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MLI-E 12/1200 –User and Installation Manual
4.8 Set battery in normal operation mode
The Li-Ion battery is pre-programmed in storage mode.
Before it is used, the Li-Ion battery must be set up in
normal operation mode.
The Li-Ion battery can be set to normal operation mode by
one of the following procedures:
•Press the red button (S1 in Figure 4) for 2 seconds.
•Connect the battery to the charger and charge the
battery.
4.9 Charger settings
A single Mastervolt Li-ion battery can be charged with any
standard Mastervolt battery charger. These chargers
feature the MLI charging option. Without this option, IUoUo
charge settings must be as follows:
Li-ion battery
model
Bulk / absorption
voltage setting
Float voltage
setting
MLI-E 12/1200
14.25 V
13.5 V
Refer to the manual of the battery charger for adjustment.
The temperature of each cell pack as well as the
temperature of the entire Li-ion battery is monitored by the
cell management system.
CAUTION
Do not use a temperature sensor for
temperature compensated charging!
4.10 Fuse to cable size
For fuses that comply with your cabling cross sections, we
refer to ISO 10133.
4.11 Battery balancing
During the batteries lifespan, the cells within the battery
may become unbalanced due to high discharge currents
and short float charge periods. This may result in a loss of
capacity and overcharged cells.
The MLI-E 12/1200 automatically balances the cells if
necessary. Balancing can take place during charging and
idle mode.
4.12 Commissioning
1. Check all wiring and connections; see also the figures
in chapter 4 for wiring details.
2. Install all fuses.
3. Switch on some loads.
4. Verify that a current is flowing out of the battery
(negative current).
5. Switch off the load, switch on the charger and verify
that a current is flowing into the battery (positive
value).
6. Charge the Li-ion battery fully until the charger
switches to the float stage (maintenance charge) of
the charging algorithm.
Now the MLI-E is ready for operation.

MLI-E 12/1200 –User and Installation Manual
13
5 COMMUNICATION
The MLI-E can be connected to an NMEA 2000 or
MasterBus network. For both networks select
communication type NMEA 2000 by setting the
Configuration switches (S2 Figure 4 on page 7).
Switch 1
Switch 2
Switch 3
Protocol
Off
On
Off
CANOpen
On
On
Off
NMEA 2000
5.1 Bluetooth app
Hands-on monitoring is available using Bluetooth and a
mobile app. To pair the battery with the app:
1. Download the battery monitoring app by going to the
Apple App Store or the Google Play Store and
searching for "Mastervolt". The app can be installed
on an iPhone running iOS 9 or later, or on any
Android device that runs version 5.0 or higher.
2. Open the app and tap the Scan for Bluetooth
devices icon. Make sure Bluetooth is turned on.
3. Select the battery you want to connect.
4. After about two seconds, you need to pair the battery.
On the MLI-E, double press the red button (S1 in
Figure 4).
5. On the phone, confirm to connect to the device.
6. When connected, close the previous window. The app
is now ready for use.
a) Put MLI-E in storage
mode
b) New MLI-E firmware
available
c) About the MLI-E
d) Return to the list
e) About support
f) App settings

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MLI-E 12/1200 –User and Installation Manual
5.2 Basic NMEA Components and how to use them
Figure 12: Basic NMEA Network Example
Power Tee –Connects the network to a power source.
Backbone Cable –Connects tee connectors to one
another or to a power tee.
Tee Connector –Create a point within the network
backbone to add a drop cable and device.
Drop Cable –Connects the network backbone to
NMEA 2000 devices.
NMEA 2000 device –Any electronic device with an
NMEA 2000 connection and an NMEA 2000
communication protocol;
Terminating Resistors –Terminators are required on
each end of the network backbone to ensure signal
integrity.
5.2.1 Adding additional NMEA 2000 devices
1. Start by determining where you will need to place a
drop cable for the device.
2. Once you have determined this location, disconnect
the backbone at the closest backbone connection and
add in a tee connector. When connecting several drop
cables in a similar location use an Ancor 2-way or 4-
way tee connector.
3. Reconnect the backbone connection(s) with the new
tee connector in place.
4. Connect the drop cable to the black coupler on the tee
and then connect to the new NMEA 2000 device.
CAUTION!
Always make sure the NMEA 2000 network
has TWO terminating resistors (one at each
end of the backbone) and is connected to a
power source with a power tee in ONLY ONE
location.
5.2.2 NMEA 2000 Network limits
•Total length of the NMEA 2000 network cannot
exceed 100 meters (328 feet)
•Each drop cable cannot exceed 6 meters (19.7 feet)
•Total length of all drop cables within the network
cannot exceed 78 meters (256 feet)
•Maximum number of connected devices cannot
exceed 30.
•There is no limit to the number of MLI-E batteries that
can be monitored by an NMEA display.
5.3 What is MasterBus?
All devices that are suitable for MasterBus are
marked by the MasterBus symbol.
MasterBus is a CAN based, fully decentralized data
network for communication between Mastervolt devices.
MasterBus is used as power management system for all
connected equipment, such as the inverter, battery
charger, generator and many more. Every device that is
compatible with MasterBus is equipped with two data
ports. The devices are simply daisy chained together,
forming a local data network. This facilitates
communication between the connected devices, for
instance to start a generator when the batteries are low.
CAUTION!
Never connect a non-MasterBus device to the
MasterBus network directly! This will void
warranty of all MasterBus devices connected.
5.3.1 How to set up a MasterBus network
Keep the following rules in mind:
•Connections between the devices are made by
standard straight UTP patch cables. Mastervolt can
supply these cables.
•MasterBus needs a terminating device on both ends
of the network.
•The electric power for the network comes from the
connected devices according to the rule:
1 powering / 3 non-powering. At least one device in
the network should have powering capabilities. As all
powering devices are galvanically isolated, multiple
powering devices are allowed. Spread the powering
devices over the network. The MLI-E has no
MasterBus powering capabilities.
•Do not make ring networks.
•Do not make T-connections in the network.
5.3.2 Monitor and configure the MLI-E with
MasterBus
Monitoring and controlling the MLI-E in a MasterBus
network requires a Mastervolt EasyView 5 remote control.
Note: One EasyView 5 panel can monitor two MLI-E
batteries (always as separate units).
To configure the MLI-E in a MasterBus network, a
MasterBus-USB interface connected to a PC with
MasterAdjust software is also needed.

MLI-E 12/1200 –User and Installation Manual
15
MONITORING TAB (read only)
Menu
Description
General
State
OK; the MLI-E is fully operational
Discharge fail; fault condition, the MLI-E cannot be discharged
Charge fail; fault condition, the MLI-E cannot be charged
State of charge
(%)
Battery state of charge
Time remaining
Time remaining at current discharge in days:hours
Battery (V)
Battery voltage measured by the cell management system
Battery (A)
Current measured by the cell management system. Positive value: charging, Negative value:
discharging
Battery (°C)
Internal temperature of the battery
ALARM TAB
Menu
Description
Critical
UBat too high
Battery voltage > 15.4V*
UBat too low
Battery voltage < 11.0V*
Temperature
The internal temperature is 80ºC or -25ºC*
Important
UBat very high
The battery voltage is 15.0V*
UBat very low
The battery voltage is 11.5V*
Over current
The charge current is > 90A for more than 30 seconds. Reduce current.
The battery current is >200A for more than 30 seconds. Reduce load immediately.
EVENTS TAB
Menu
Description
Event source
UBat very low
Battery voltage < 11.5V
UBat very high
Battery voltage > 15.0V
Battery pre low
State of Charge < Battery pre low level**, 30% by default
Battery low
State of Charge < Battery low level**, 20% by default
Battery full
State of Charge > Battery full level**, 95% by default
Overvoltage
Battery voltage > Overvoltage for Delay seconds**
* An alarm popup is provided in MasterBus.
** See Configuration tab –Event levels –for adjustment of the threshold levels
.

16
MLI-E 12/1200 –User and Installation Manual
6 TROUBLE SHOOTING
Failure
Possible cause
What to do
No DC power
available
A fuse has blown
Check all fuses and replace if necessary.
A cable or cable connection is defective
Check all cables and their connections. Replace if
necessary.
The MLI-E is in Alarm Mode
Red LED is lit. (Section 3.6)
Verify that the charging voltage is within the
specifications (section 8.1). Discharge the MLI-E or
press the red button (S1 in Figure 4) for 1 second.
The battery
cannot be
discharged.
Battery is in normal mode
Green LED is blinking/lit. (Section 3.6)
Check the installation of the battery.
Battery is in shutdown mode.
No LED is lit (Section 3.6)
Charge the battery or press the red button (S1 in
Figure 4) for 2 seconds.
Battery is in degrade mode
Red LED is blinking/lit. (Section 3.6)
Charge the battery.
The battery
cannot be
charged.
Battery is in normal mode Green LED is
Blinking/lit. (Section 3.6)
Check the installation of the battery.
Battery is in degrade mode
Red LED is lit. (Section 3.6)
Discharge the battery.
Green and Yellow
LED is blinking or
lit
Battery in Warning mode (Section 3.6)
State of charge is low, fully charge the battery
Alarm on the
MasterBus display
An alarm is activated.
The EasyView 5 will display an alarm. Correct the
source of the alarm.
MasterBus display
shows no Li-ion
battery
The firmware of the EasyView 5 is too old.
Check if the firmware version is at least V2.10
Error in the wiring.
Check the MasterBus cables.
No terminating device placed at the ends of
the network.
MasterBus needs a terminating device on both ends
of the network (see section 6.3). Check if available.
MasterBus network is configured as a ring
network.
Ring networks are not allowed. Check the
connections of the network (section 6.3).
Battery is in storage mode
Charge the battery or press the red button (S1 in
Figure 4) for 2 seconds.

MLI-E 12/1200 –User and Installation Manual
17
7 MAINTENANCE, DECOMMISSIONING AND STORAGE
7.1 Maintenance
No specific maintenance of the Li-ion battery is required.
Examine your electrical installation on a regular base, at
least once a year. Defects such as loose connections,
burnt wiring etc. must be corrected immediately.
Keep the battery clean and dry to avoid leakage currents.
If necessary, use a soft clean cloth to clean the casing of
the Li-ion battery. Never use any liquids, acids or scourers.
Place the enclosed protective caps over the terminals
before cleaning and other maintenance activities to avoid
the risk of contacting the terminals.
7.2 Taking out of operation
If it is necessary to take the Li-ion battery out of operation,
follow the instructions in order of succession as described
below:
1. Disconnect all loads and charging devices.
2. Move the optional maintenance switch in the off
position.
3. Disconnect all wiring
4. Place the enclosed protective caps over the terminals
to avoid the risk of contacting the terminals.
Now the Li-ion battery can be demounted in a safe way.
7.3 Battery replacement
CAUTION
If Li-ion batteries need to be replaced
individually, make sure that:
Before reconnection: the open circuit voltage
of these batteries equals the voltage of the
replaced or paralleled batteries.
7.4 Storage
The MLI-E should be stored in a dry and well ventilated
environment. Follow the storage instructions in this section
to optimize the lifespan of the battery during storage. If
these instructions are not followed and the MLI-E has no
charge remaining when it is checked, consider it to be
damaged. Do not attempt to recharge or use it. Replace it
with a new battery.
1. Charge the Li-ion battery to > 80% of its capacity.
2. Disconnect the MLI-E from all loads and the charging
device.
3. To put the MLI-E in storage mode, 12V should be
applied to pins 3/4 of connector J2. Where Pin 3 is
+12V and pin 4 is GND, as shown in Figure 13.
WARNING
Avoid short-circuiting the battery terminals.
4. Place the terminal covers over the battery’s terminals
during storage.
5. Store the battery in a cool and well ventilated space.
6. Avoid exposure of the battery to sunlight and/or UV
radiation.
7. Charge the battery to > 80% of its capacity every 100
days.
Figure 13: Storage
Tip: you can also do this with the Bluetooth
App. See section 5.1.
To return to normal operation, perform one of the following
actions:
•Press the red button (S1 in Figure 4) for 2 seconds.
•Connect the MLI-E to the charger and charge before
use.

18
MLI-E 12/1200 –User and Installation Manual
8 TECHNICAL INFORMATION
8.1 Specifications
Model
MLI-E 12/1200
Article number
66011200
Nominal voltage
12V
No load voltage, fully charged
13.2V
Nominal capacity (Cn)
90Ah
Nominal energy
1.2 kWh
Approximate weight
12.5 kg (27.6 lb)
Terminal type
Bolts M8 or Automotive
Chemistry
Lithium iron phosphate
Charge/discharge parameters
Charge voltage, Bulk/absorption phase****
Minimum 13.75V
Recommended 14.25V
Maximum 14.6V
Charge voltage, Float phase
13.5V
Undervoltage cut off voltage***
10V
Overvoltage cut off voltage***
15V
Recommended charge / discharge current
30A / 45A
Maximum charge / discharge current
90A / 200A
Discharge pulse current (30sec)
350A
Discharge current pulse (1sec)
600A
Short circuit protection
700A
Rated capacity and cycle life
Rated capacity
90Ah (1.2 kWh)
Cycle life
~ 5000 @ 80% DOD and 23ºC
General
Parallel configuration*
Yes, unlimited
Series configuration*
No
Operating temperature**
–40 to 65ºC / –40 to 149ºF
Nominal operating temperature:
25ºC / 77ºF
Storage temperature**
–40 to 65ºC / –40 to 149ºF
Self-discharge
< 4% per month @ 23ºC
Warranty
2 years
Protection degree
IP51
Standards, approvals & listings
CE, E-mark
Dimensions in mm [inches]
Length (L)
353 [13.90]
Width (W)
175 [6.89]
Height (H)
190 [7.48]
Installation angle
Mountable in multiple orientations, suitable for LN5 fastening brackets
Interfacing
MasterBus connectivity
Yes (see chapter 1)
Powering capabilities for MasterBus
No, cuts power to the bus (see section 3.4)
Internal disconnect switch
Yes
NMEA 2000 connectivity
Yes
Bluetooth
Yes, 10m (class 2)
* For systems with more than one single battery, please refer to www.mastervolt.com/batteries.
** Temperatures below 5ºC/41ºF and above 25ºC/77ºF may affect life time and cycle life.
Charging: derating <0°C and >45°C / <32°F and >113°F
*** Trigger point for safety switch
**** Bulk/absorption phase should be terminated before current accepted by the battery < 0,015xCn

MLI-E 12/1200 –User and Installation Manual
19
8.2 Dimensions
Figure 14: Li-ion battery MLI-E 12/1200 dimensions in mm [inches]

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