Mastervolt MLI Ultra 24/5000 24V 180Ah 5000Wh lithium battery LiFePo4

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The Mastervolt MLI Ultra 24/5000 (MPN 66025000) has been designed to take advantage of the best properties of lithium-ion technology in the harshest conditions (high charging/discharging currents, humid environment, mechanical shock or vibration). To make this possible, apart from choosing the best lithium iron phosphate cells, the MLI Ultra products have two other characteristics: a waterproof housing and the best battery management system (BMS). The BMS includes active cell balancing for optimal use of each individual cell, even during rapid charging and discharging, integrated battery monitoring so you always have the most up-to-date information on the status of your battery, and last but not least, MasterBus communication to your Mastervolt battery charger to guarantee the best possible recharging and lifetime of your battery.

Key product features of the MLI 24/50000 Ultra

  • Top performance, high-capacity lithium-ion batteries.
  • 5000Wh nominal capacity
  • Safest lithium-ion chemistry currently available.
  • Ideally suitable for high utilization over longer periods and short loading times.
  • Savings of up to 70% in space and weight.
  • at least three times longer service life compared to conventional batteries (2000 cycles).
  • High cycle efficiency (80% discharge possible without damaging the battery)
  • High discharge rate up to 3C
  • MasterBus communication with each Mastervolt battery charger.
  • Fast charging up to half an hour
  • Integrated Battery Management System (BMS) and battery monitoring.
  • Integrated battery monitoring (ampere-hour consumption, charge status).
  • Waterproof electronics housing (IP 65)
  • Tested and certified according to UN38.3
  • Two year warranty
  • best quality (designed and built in the Netherlands)

Safest lithium ion technology currently available

The term lithium ion covers several chemical properties, each with slightly different material compositions. These differences result in deviations in terms of energy and power density, service life, costs and safety. Because safety should always be the top priority, Mastervolt only uses the safest lithium-ion chemistry available, Lithium Iron Phosphate (LiFePO4).

Best suited for large battery banks

The lithium-ion ultra battery from Mastervolt has an integrated battery management system with active cell balancing and Masterbus communication. This ensures that the battery operates more efficiently and safely, even under the harshest conditions.

Integrated battery management system

The lithium-ion ultra battery from Mastervolt has an integrated battery management system with active cell balancing and MasterBus communication itself under This ensures efficient and safe operation of the battery in the harshest conditions. The MLS batteries have a built-in automatic disconnect switch, because safety is always the top priority.

weight reduction

Speed ​​and power are key considerations, and a lithium-ion battery that weighs 70% less than comparable lead-acid batteries offers significant benefits. With a capacity of 20 kWh on board, you can easily save up to 500 kg and achieve significantly better performance.

First class performance

The Mastervolt lithium-ion batteries have a realistic service life of more than 2000 cycles at a depth of discharge (DOD) of 80%. So they store five times more energy than lead-acid batteries, thanks to such features as extremely high efficiency, almost non-existent self-discharge and minimal creation of the notorious 'memory effect'.

Easy installation of the MLI-Ultra batteries

LITHIUM-ION ULTRA BATTERIES The elegant design of the MLI Ultra batteries in the characteristic Mastervolt colors includes two integrated handles with a recess for a correct and practical installation the cable. Because the battery posts are easily accessible and fully protected, additional insulating covers are not required. The MLS batteries make a great direct swap in a lead-acid battery system as there are very few changes to be made in the system.

Mastervolt, proud supplier of the Volvo Ocean Race 2015

Mastervolt is extremely proud to be a supplier to the prestigious Volvo Ocean Race 2014-2015. The tailor-made electrical system of the seven participating yachts consisted exclusively of standard Mastervolt products. That's why this competition was also the ultimate product test for Mastervolt. After approximately 250,000 nautical miles, we can now unreservedly claim that we passed this test with flying colors. The Mastervolt system has performed without any complaints even under the most extreme weather conditions. Mission accomplished! On board on all yachts were 2x 24/5000 MLI Ultra batteries as the heart of the electrical system.

"Mastervolt's units have already proven themselves in the previous Volvo Ocean Races. They functioned as high-performance, lightweight products and through Mastervolt's global network participants always have access to support if needed We are not only staying with Mastervolt for this Volvo Ocean Race, but also in 2017/2018." WILL BEST, MANAGING DIRECTOR DIVERSE YACHT SERVICES, UNITED KINGDOM

Due to the classification as dangerous goods, this product will be sent by a forwarding agent!

Scope of delivery:

1x Mastervolt 66015000 MLI 24/5000 Ultra battery - 24V 5000Wh LiFePO4

1x Mastervolt 77040300 3m Masterbus connection cable

2x battery clamps 2x M8 screw + ring + spring washer

1x operating instructions

1x instructions for series connection and parallel connection of MLI Ultra batteries

Data sheet



Battery self-discharge

< 4% per month @ 20 degrees Celsius

battery discharge current short

1800A for 10 seconds

battery discharge current cont


Battery cut-off relay


battery charging current max


number of battery cycles

2000 cycles at 80% DoD

Battery empty voltage charged

26.4V DC



battery nominal voltage

24V DC

battery chemistry

lithium iron phosphate

battery monitoring


Rated battery energy wh


Battery bouncing circuit

yes, unlimited

battery series connection

yes, max 10 in a row

master bus compatible



2 years