SKU:
EX 66025500
1-2 weeks delivery time
Our managers will contact you and clarify the terms of the order
The Mastervolt MLI Ultra 24/5500 (66025500) is a premium 5.5 kWh LiFePO₄ battery system engineered for heavy-duty marine and off-grid power applications. Designed with integrated battery monitoring, CANbus communication (MasterBus, NMEA 2000, CZone), and a high-performance BMS, it supports charge/discharge rates up to 2.5C. This IP65-rated unit features a self-learning cell balancing algorithm for longer cycle life and faster charge cycles. Mounting is flexible, and unlimited parallel or 10-unit series connection is supported. Safety relay (SKU 7702B-BSS) is required for installation.
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Mastervolt 66025500 - MLI Ultra 24/5500 – 5.5 kWh Lithium Battery
The MLI Ultra 24/5500 is Mastervolt’s flagship 24 V lithium-ion battery built to withstand the harshest operating environments. Offering 200 Ah capacity and 5500 Wh of energy, it supports aggressive load profiles and fast charging while significantly reducing system weight and volume. This model integrates an advanced BMS with embedded cell-level monitoring, thermal management, and proactive balancing to ensure safety, performance, and longevity.
With full MasterBus, NMEA 2000, and CZone support, the battery integrates seamlessly into modern vessel and vehicle systems. Its internal monitoring tracks state of charge, amps consumed, temperature, and more in real time. A waterproof electronics enclosure (IP65) protects all critical systems.
Key Features:
- 5.5 kWh Lithium Iron Phosphate (LiFePO₄) battery
- Nominal Voltage: 26.4 V / Capacity: 200 Ah
- Cycle life: 3500 cycles @ 80% DoD (25 °C)
- Charge rate up to 200 A (1C), discharge up to 500 A continuous, 1800 A peak (10 s)
- Integrated BMS with automatic cell balancing & monitoring
- Supports MasterBus, CZone, and NMEA 2000 protocols
- Self-learning balancing algorithm maximizes battery health
- IP65 waterproof electronics cabinet
- Unlimited parallel operation; series up to 10 units (48 V+ requires isolated box)
- Complies with CE, E-Mark, RVIA, UN38.3 (DNV-GL pending)
Applications:
- Electric propulsion systems
- Marine house battery banks
- Industrial and off-grid power storage
- Heavy-duty RV and vehicle battery systems
General Specifications:
Part Number 66025500 Nominal Voltage 26.4 V Capacity 200 Ah Energy 5500 Wh Cycle Life 3500 cycles @ 80% DoD (25 °C) Max Continuous Discharge 500 A Max Charge Current 200 A Peak Discharge Current 1800 A (10 s) Recommended Charge Current ≤ 60 A Battery Monitoring Integrated Terminals M8 Mounting Position Upright or 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)
Communication & Protection:
BMS Integrated Self-learning Balancing Yes Communication Protocols MasterBus, CZone, NMEA 2000 Protection Degree IP65 (electronics) Parallel Connection Unlimited Series Connection Up to 10 batteries Safety Relay Mandatory – Order Part 7702B-BSS Certifications CE, E-Mark, UN38.3, RVIA (DNV-GL pending)
Installation Notes:
- Always include safety relay (Part 7702B-BSS) as required by Mastervolt
- For voltages over 48 V, use dedicated battery enclosure to meet safety compliance
- Use with Mastervolt battery chargers for optimal BMS integration
Documents
MLI Ultra 24_5500 - User Manual Size: 1,8 Mb -
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