Batteries Lithium Ion Mastervolt - MLI Ultra 12V - 1250Wh - 100Ah
  • Batteries Lithium Ion Mastervolt - MLI Ultra 12V - 1250Wh - 100Ah
  • Batteries Lithium Ion Mastervolt - MLI Ultra 12V - 1250Wh - 100Ah
  • Batteries Lithium Ion Mastervolt - MLI Ultra 12V - 1250Wh - 100Ah

Lithium Ion Mastervolt Battery - Plug and Play - MLI Ultra 12V - 1250Wh - 100Ah


Lithium Ion Mastervolt Battery - Plug and Play - MLI Ultra 12V - 1250Wh - 100Ah

Lithium Ion batteries have high energy density and are perfect for cyclical applications.

Warranty 2 years

Reference : DEV-TE-66011250

local_shipping On quote - Have it delivered within 2 to 8 days
A partir de :
€1,425.00 VAT excluded
i.e. €1,710.00 including tax


Lithium Ion Mastervolt Battery - Plug and Play - MLI Ultra 12V - 1250Wh

Robust, extreme performance

The MLI series offers extreme lithium-ion performance even in the most difficult conditions, such as high load and discharge currents, wet environments, mechanical shocks or vibrations. This is achieved by combining our best Lithium-Fer Phosphate (LiFePO4) cells with a battery management system (BMS) that owns inside a robust and waterproof housing.

The sophisticated BMS Mastervolt ensures optimal use of each individual cell. Integrated battery monitoring provides you with accurate and up-to-date information about the state of your battery. Integrated communication NMEA2000, CZone and MasterBus allows full integration of the system, to ensure the best possible charge, while maximizing the life of your battery.

Self-balancing algorithm

MLI Ultra batteries are equipped with a self-balancing algorithm that predicts the behavior of each battery cell and proactively balances, allowing a faster and more efficient charging cycle. This system eliminates unnecessary stress on cells, resulting in an even longer life of the battery.

Ice cold weather performance

The MLI Ultra 1250 comes with an integrated thermal heating cushion and sophisticated low temperature control to ensure maximum load performance at freezing temperatures. In cold weather, it uses the connected charger to power the heating cushion and maintain the battery cells temperature above the freezing point. This ensures the fastest possible load and full power capacities, even the coldest days.

Integrated slaughter

The integrated battery safety switch disconnects the battery cells in the event of anomaly. This is based on intelligent algorithms analyzing all details of battery condition such as charging current, temperature, cell details, etc. Where other integrated switches have current limitations, the MLI Ultra 1250 will continue to provide energy to up to 200 amperes continuously.

Plug-and-play by automatic configuration

The installation of a Lithium Ion battery has never been so simple. Connect the MLI Ultra 1250 to any compatible Mastervolt charger, connect the communication cable and the battery automatically configure the charger to match the battery. In this way, a fluid and careless load experience is ensured without needing configuration tools.

Main features

  • Ultimate performance, robust lithium-ion batteries.
  • BMS chemistry and LiFePO4 according to the highest safety standards.
  • Instant replacement for Group 31 and Group 49 batteries (85-90 Ah).
  • More than three times the life of traditional batteries.
  • Up to 70% space and space saving weight.
  • High load/discharge rate up to 2 C.
  • Fast charging in 60 minutes.
  • Standard connection up to 48V possible.
  • Integrated slaughter.
  • Built-in thermal heating cushion with control.
  • Integrated battery monitoring (Tension, Running, Load State, Time left).
  • MasterBus communication with any Mastervolt battery charger or smart remote control.
  • Compatible with CZone and NMEA2000.
  • Fully waterproof.
  • Certified UN 38.3, EC, E-Mark and FCC.
  • Compliance with UL1973 and RVIA standards, TEI listed.

*Due to thermal protection, this high discharge current can be used for 3 minutes to or above an ambient temperature of 25oC [77 ºF].


General specifications
Nominal battery voltage 12 V
Nominal battery capacity 100 Ah
Battery nominal energy capacity 1250 Wh
Lifetime in cycles 3500 cycles at 80% DOD at 25 0C, max. c3 load and C2 discharge
Maximum load 100 A
Recommended charge ≤ 50 A
Max. permanent discharge current 200 A
Maximum continuous load 100 A
Current discharge peak 500 A (10 sec.)
Battery monitoring integrated
Communication MasterBus yes
Communication CZone/NMEA 2000 yes
Battery terminals M8
Mounting position vertical (recommended) or on any side of the length
Dimensions yes
Dimensions (with markers and handles), LxlxH 330 x 173 x 210 mm
13,0 x 6,8 x 8,3.3 inches
Weight of the product 15 kg
33.1 pounds
Weight to the shipment 17.2 kg
37,9 pounds
Standards CE, E-Mark / RVIA Complaint / DNV-GL scheduled for end 2021
Technical specifications
Chemical composition of the battery Lithium fer phosphate
Protection index IP65 (electronic cabinet)
Parallel connection yes, unlimited
Standard connection yes, up to 48 V
Protection overvoltage, undervoltage, over-temperature
Safety relay integrated
Stop relay controls integrated
Product Details

Data sheet

330 x 173 x 210mm
Weight of bare product (in kg)
Battery Type
On quote - Have it delivered within 2 to 8 days
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Reference: TE-REL-RB52

Brand: RELiON

Lithium battery 12 V - 52 Ah - 4SC - LiFePO4 - RELiON

Lithium battery 12 V - 52 Ah - LiFePO4 - RELiON - 6.2 kg Lithium batteries allow you to use 100% of their capacity, up to 80% of the discharge rate. All RELION LiFePO4 batteries offer installation flexibility, fast charging capabilities and require no maintenance.

Price €514.16 excluding VAT
€616.99 including tax