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Mastervolt Lithium Ion Ultimate 12/2500
Cat. No. MV-66012500
Weight 68.3 lbs

Lithium Ion batteries have a high energy density and are perfect for cyclic applications. They offer savings of up to 70% in volume and weight compared to traditional lead-acid batteries, with three times as many charging cycles (2000 full cycles). Another major benefit of the Mastervolt Li-ion battery is that it is equipped with a Battery Management System (BMS), which automatically compensates for any imbalance between the cells. This guarantees you a constant high capacity and longer battery lifespan. The Lithium Ion Ultra series includes integrated battery monitoring.

Having perfected the legendary Lithium Ion battery in a few key areas, Mastervolt has developed an unrivalled 2500 or 5000 Wh powerhouse. The MLI Ultra has an ultra-long lifespan that offers over 2000 cycles; a recharge time of less than an hour; active cell balancing for efficient and safe use of the Li-ion cells; and integrated battery monitoring to further simplify your system. What’s more, the Ultra communicates directly with your Mastervolt battery charger via MasterBus to ensure the best possible recharging. Add in the fact that it takes up 70% less space and weight compared to lead acid batteries, and you’ll see why this battery is the best choice. 

  • Highly advanced technology.
  • Multifunctional battery of 2.5 kWh or 5 kWh.
  • Saves up to 70% in space and weight.
  • Three times the lifespan of traditional batteries (2000 cycles).
  • Ultra-fast charging and discharging.
  • High efficiency.
  • MasterBus communication with every Mastervolt battery charger.
  • Integrated Battery Management System (BMS) and monitoring.
  • Series balancing technology optimizes string connection.
  • Safest Lithium Ion technology available.
  • Tested and certified according to UN38.3.
  • Two year warranty.


General specifications
Nominal battery voltage13,2 V
Nominal battery capacity180 Ah
Nominal battery energy capacity2500 Wh
Max. continuous discharge current500 A (2,8 C)
Peak discharge current1800 A (10 C) for 10s
Cycle life~2000 at 80 % DoD
Max. charge current500 A (2,8 C)
Battery monitoringintegrated
MasterBus communicationyes
Battery terminalsM8
Mounting positionupright or either long side
Max. outer dimensions (incl. terminals/grip handles), lxwxh341 x 197 x 355 mm
13.4 x 7.8 x 14.0 inch
Weight31 kg
68.3 lb
Technical specifications
Battery chemistryLithium Iron Phosphate
Protection degreeIP65 (electronics cabinet)
Parallel connectionyes, unlimited
Series connectionyes, up to 10 batteries (series balancing up to 2 batteries)
Protectionsover voltage, under voltage, over temperature
Safety relayto be added mandatorily, product code 79007700
Safety relay controlsintegrated

Installation manuals

MLI Ultra 12/2500

Multiple Batteries Manual MLI Ultra 12/2500 12/5000 24/5000

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