SKU:
EX 66015500
1-2 weeks delivery time
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The Mastervolt MLI Ultra 12/5500 (part number 66015500) is a rugged 13.2 V lithium iron phosphate battery with 400 Ah capacity and 5.5 kWh energy storage, built for maximum endurance in harsh marine, mobile, and industrial environments. Featuring high-current capability (500 A continuous, 1800 A peak), integrated battery monitoring, NMEA 2000, CZone, and MasterBus communication, and a proprietary BMS with self-learning cell balancing, this model sets the gold standard for high-performance lithium systems.
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Mastervolt 66015500 – MLI Ultra 12/5500 Lithium Battery
The MLI Ultra 12/5500 from Mastervolt is a premium-grade lithium iron phosphate (LiFePO₄) battery engineered for extreme duty. It delivers 400 Ah at 13.2 V (5.5 kWh) in a rugged, IP65-sealed case with advanced battery management and integration. Ideal for high-demand applications such as electric propulsion, energy backup, and hybrid systems, the MLI 12/5500 ensures durability, safety, and performance with more than 3500 cycles at 80% depth of discharge.
Key Features:
- 13.2 V, 400 Ah Lithium Iron Phosphate battery with 5.5 kWh total capacity
- High-performance BMS with self-learning balancing algorithm
- Cycle life: 3500 full cycles @ 80% DoD
- Max charge current: 400 A, recommended: ≤ 120 A
- Continuous discharge: 500 A, peak: 1800 A for 10 seconds
- Integrated battery monitoring: SoC, Ah tracking, voltage, temperature
- Interfaces: MasterBus, CZone/NMEA 2000 (native)
- Parallel connection: Unlimited | Series: Up to 10 batteries
- High safety standards: CE, E-Mark, UL1973, UN38.3, RVIA, DNV-GL pending
- Requires external 12 V safety relay (P/N 7700B-BSS)
System Integration:
- MasterBus: Full system compatibility with Mastervolt chargers/inverters
- CZone/NMEA 2000: Plug-and-play integration with digital control systems
- Monitoring: Integrated, real-time feedback on battery status
⚠ Mandatory Safety Note:
Mastervolt mandates the use of a 12 V safety relay (P/N 7700B-BSS) to meet electrical protection standards. Relay control is integrated into the battery system.
General Specifications:
Part Number 66015500 Nominal Voltage 13.2 V Capacity 400 Ah Total Energy 5500 Wh Cycle Life 3500 cycles @ 80% DoD (25 °C) Max Charge Current 400 A Recommended Charge ≤ 120 A Max Continuous Discharge 500 A Peak Discharge Current 1800 A (10 s) Battery Monitoring Integrated Communication MasterBus, CZone, NMEA 2000 Terminals M8 Mounting Position Upright (recommended) or on either long side Dimensions (L×W×H) 622 × 197 × 355 mm / 24.5 × 7.8 × 14.0 in Product Weight 55 kg / 121.3 lb Shipping Weight 60 kg / 132.3 lb Compliance CE, E-Mark, UL1973, RVIA, UN38.3, DNV-GL pending
Technical Specifications:
Battery Chemistry Lithium Iron Phosphate (LiFePO₄) Protection Rating IP65 (sealed electronics housing) Parallel Use Yes, unlimited Series Use Yes, up to 10 units (note: >48 V requires insulation enclosure) Integrated Protections Over-voltage, under-voltage, over-temperature Safety Relay Requirement Yes, 12 V external (P/N 7700B-BSS) Safety Relay Control Integrated into battery logic Documents
MLI Ultra 12_5500 - User Manual Size: 1,8 Mb -
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