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MASTERVOLT MLI Ultra 1250 Lithium Battery
Plus ChargeMaster 12/35-3 & SmartRemote
Maximum operational reliability in perfect balance with this set from MASTERVOLT - future-oriented lithium technology that you can rely on. The MASTERVOLT MLI Ultra is a lithium power pack with a capacity of 100 Ah (at a voltage of 12 V). With LiFePO4 chemistry and high-tech BMS, MASTERVOLT guarantees the best possible standards in terms of safety, whilst maintaining the high quality the company is known for.
The advantages of MLI Ultra 1250 lithium technology
- High safety standards thanks to LiFePO4 chemistry and integrated high tech Battery Management System (BMS).
- Significantly higher life cycle compared to conventional lead-acid batteries.
- Heavy duty, extreme performance with a discharge rate of up to 2 C (max. 200 A for 3-5 minutes at ≥ 25°C)
- Perfect for use as a starter battery, for bow thrusters or consumers.
- Fast charging thanks to high charging currents of up to 0.5 C (50A)
- Integrated MasterBus interface for complete NMEA2000 network compatibility
- Sophisticated low-temperature control and integrated thermal heat pad to ensure maximum charging performance even when temperatures drop below freezing
- Series connection of up to 4 MLI Ultra 12/1250 possible / 2 MLI Ultra 24/1250 (max. 48 V)
- Integrated battery switch - disconnects battery cells in case of abnormalities for maximum safety
- Similar in size to comparable acid-lead, AGM or GEL batteries
- Low weight - just 15 kg
The Perfect Match
In combination with a MASTERVOLT Chargemaster battery charger, not only do you benefit from maximum performance, but also the highest possible safety for your lithium system. Using the MasterBus interface to connect your MASTERVOLT MLI 1250 Ultra and a Chargemaster battery charger is the best way to charge your battery and increase its life span at the same time. When the MLI Ultra and Chargemaster charger are connected via the MasterBus interface, the charger can automatically apply the best settings for the battery in real time depending on the current situation.
Installing a lithium-ion battery has never been easier. Hook up your MLI Ultra 1250 to the MASTERVOLT Chargemaster Plus charger and connect the two units using the MasterBus interface and the charger is automatically configured with the optimal settings for the battery, making your charging experience hassle-free and without the need for configuration tools.
Thanks to the NMEA2000 interface (micro-C connector), the MASTERVOLT MLI litihum battery can be quickly and easily integrated into an existing NMEA2000 network. With compatible devices, you can retrieve data from the battery at any time.
View a range of information on the SmartRemote display via the MASTERVOLT Chargemaster Plus using the MasterBus interface. Display key parameters, such as current supply, the power of the charger, as well as the voltage and temperature of the connected batteries.
Chargemaster Plus 12/35-3
ChargeMaster Plus can handle all possible mains voltages and frequencies worldwide. The battery chargers can resist large voltage fluctuations and high temperatures, making them suitable for the harshest environments - perfect for use on boats and in cars. ChargeMaster PLUS units comply with CE, E-mark, ABYC, UL, SAE, CEC and RCM/C-Tick standards.
ChargeMaster PLUS chargers are self-explanatory! They display the charging phase of all three outputs in an easy to understand way. Robust and ergonomic connections save installation time.
In modern applications, all components work hand in hand. The CAN-based MasterBus allows the charger to communicate with displays, shunts and power systems, including communication standards such as CZone, NMEA and CANopen. The ChargeMaster PLUS can operate as a power supply for sensitive communication equipment or during the construction phase of a boat.
Everything in View
Checking your batteries, adjusting your shore fuse or controlling your Mastervolt charger/inverter has never been easier. The display communicates with the MASTERVOLT ChargeMaster Plus & CombiMaster devices, shows key parameters and allows simple device settings.
With its attractive design and compact size, the SmartRemote is thus ideal as a remote control panel in smaller systems and works as a local device display in larger systems.
- Full colour display for local device monitoring
- Displays four key parameters
- Control key device functions
- CZone and MasterBus network compatible
- Universal, easy mounting
- Plug & Play – no configuration, no power supply needed
MASTERVOLT MLI 1250 Lithium Battery
|Specifications / technical data|
|Battery chemistry||Lithium Iron Phosphate, LiFePO4|
|System voltage||12 V||24 V|
|Nominal voltage||12.5 V||25 V|
|Capacity||100 Ah||50 Ah|
|Cycles||3500 cycles at 80 % DOD at 25 ⁰C|
|Self-discharge||< 3 % / month|
|Parallel / series connection||Battery banks (clusters) can be assembled from up to 2 or 4 identical batteries,
system voltage max. 48 V.
Mixing 12 or 24 V MLI Ultras is not permitted.
Parallel / series connection with lead-acid types is not permitted!
|Charge / discharge|
|Charge characteristic||3-stage CCCV (IUoUo)|
|Max. Charging voltage (Bulk/Absorption)||14.25 V||28.5 V|
|Final charging voltage (Float)||13.5 V||27 V|
|Max. Cont. charging current||100 A (1 C)||50 A (1 C)|
|Recommended charging current||≤ 50 A (0.5 C)||≤ 25 A (0.5 C)|
|Continuous discharge current||100 A (1 C)||50 A (1 C)|
|Max. discharge current
3-5 minutes at ≥ 25°C
|200 A (2 C)||100 A (2 C)|
|Peak discharge current
10-15 seconds at ≥ 25°C
|500 A (5 C)||250 A (5 C)|
|Discharge cut-off voltage
(temperature > 0°C, discharge current < 1 C)
|10 V||20 V|
|Nominal operating temperature||25 °C|
|Operating temperature range||-20 to 50 °C|
|Note on temperature during charging||If a charger is connected and the battery temperature is below 0 °C, the internal heater switches on until 5 °C is reached or the charger is disconnected.
It takes about an hour for the battery to warm up from -20 °C to above 0 °C.
Charging at temperatures < 5 °C may result in the battery not being charged, and the charging current being used to heat the cells first.
Temperatures below 5 °C and above 25 °C can affect the service life and the number of charging cycles.
|Storage temperature||-20 to 55 °C|
|Relative humidity||10 to 95, non-condensing|
|Battery monitoring / BMS||Integrated|
|(Safety) disconnect switch||Integrated, also can be switched manually|
|MasterBus power supply option||Yes|
|CZone / N2k compatibility||Yes|
|Certification||CE, E mark|
|Battery connection||M8 threaded blind holes or conical SAE car battery pole adapters (included)|
|Installation position||upright (recommended)
or lying on the longest side
without / with car battery pole adapters and carrying handle
|330 x 173 x 210 / 228 mm|
|Weight:||15 kg / 33 lbs|
|Connections||M8 threaded blind holes or
conical DIN/EN car battery terminal adapters, tightening torque 14.7 - 19.6 Nm
|Installation position||Upright (recommended) or
lying on the longest side
- All MASTERVOLT lithium batteries are designed to stop charging by themselves!
The BMS sends a "Stop Charge" command, which switches off the connected MASTERVOLT charging technology (chargers, DC/DC charging converters or alternator high-power regulators) via a MasterBus connection. Each lithium battery and charging source must be configured via USB interface (optional accessory) and MasterAdjust software.
- The "Stop Charge" command must be executed directly!
For charging technology not from MASTERVOLT (alternators, shore power chargers, solar regulators, wind generators, etc.), a powerful relay must be provided as an option, which is controlled via the AUX line (included in the delivery) and interrupts the connection between the charging source and the lithium battery. (Even when using third-party charging technology, configuration and "Stop Charge" function control should be carried out via USB interface and MasterAdjust software).
- The MLI Ultra is supplied ready for use in a MasterBus network or as a stand-alone battery.
For CZone and for advanced functions, the settings must be adjusted. Most settings can be adjusted via DIP switches.
Advanced or network settings are configured via a Windows laptop or notebook, using either an optional USB interface and the free MasterAdjust software or the CZone configuration tool/programme. The MasterAdjust software is available free of charge at www.mastervolt.com under downloads.
- The MLI Ultra records the following historical data: The number of charge cycles, when the last (100%) full charge occurred, the total capacity used and the lowest and highest battery voltage.
MASTERVOLT ChargeMaster Plus 12/35-3
|ChargeMaster PLUS 12/35-3|
|Nominal output voltage (output 1,2 & 3)||12 V|
|Number of battery outputs||3|
|Charging current in total||35 A at 14.25 V|
|Recommended battery capacity (total)||140 - 350 Ah|
|Nominal input voltage||120/240 V, 50/60 Hz|
|Max. AC current (230 V / 120 V)||2.5 A / 5 A|
|Mains/power supply mode||Yes|
|Dimensions HxWxD||291 x 210 x 105 mm|
|Certifications||CE, CEC, DOE, ABYC, UL1236, cULus, SAE J1171, ISO 8846, ACMA|
|Charge characteristic||IUoUo, automatic with pre-float / 3-stage for lead acid/gel/AGM/lithium-ion|
|Temperature compensation (only for lead acid types)||-30 mV/°C, temperature sensor included|
|Voltage compensation||Yes, via MasterShunt|
|DC power consumption||< 2 mA (MasterBus off)|
|Current control function||via MasterBus or CZone|
|Power factor control||Yes, > 0.98|
|Temperature range (ambient temp.)||-25 to +80 °C|
|Protection systems||Overtemperature, overload, short circuit, high/low battery voltage, spark protection|
|Display||2.8" (7.1 cm)|
|Resolution||320 x 240 px (high colour)|
|power consumption||Bus powered (<160 mW)|
|Installation||Panel mount (Ø 52 mm)|
|Dimensions (h x w x d)||72 x 72 x 29.4 mm|
|Included in delivery||MasterBus cable (6 m), Mastervolt-CZone drop cable (1 m), manual|
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