Mastervolt MLI Ultra 12/3000 Lithium-Ion Battery
Mastervolt MLI Ultra 12/3000 is a 230Ah LiFePO4 marine battery with integrated BMS, CZone/MasterBus communications, and required external safety relay.
The Mastervolt MLI Ultra 12/3000 provides 230Ah of lithium-iron-phosphate storage and approximately 3.0kWh of nominal energy for larger marine service banks. Its integrated BMS, state-of-charge monitoring, and MasterBus/CZone/NMEA 2000 communications help coordinate battery operation with compatible chargers and vessel systems. The model supports 200A continuous discharge and up to 1800A peak for 10 seconds, making high-load planning important. Mastervolt requires an external safety relay for this model, so installation must include the specified protection and approved system design.
- 230Ah / 3,000Wh LiFePO4 capacity for larger marine DC service banks
- Integrated BMS, battery monitoring, and self-learning cell balancing
- CZone, MasterBus, and NMEA 2000 communications
- 200A continuous discharge; 1,800A peak for 10 seconds
- External safety relay required by manufacturer; IP65 electronics enclosure
Manufacturer | Mastervolt |
Category | Batteries |
Item Number | 66013000 |
Series | MLI Lithium Ion Series |
Protections/ Certifications | UN38.3 designed/tested; CE; E-Mark; FCC; IP65 electronics enclosure; UL1642 applies to cells only; RVIA compliant |
Connection/Terminal | M8 threaded |
Dimensions | 341 × 197 × 355 mm (13.4 × 7.8 × 14.0 in) |
Weight | 25.4 kg (56.0 lb) |
Material | Lithium iron phosphate (LiFePO4) |
Voltage Type | DC |
Nominal Voltage | 13.2 V |
Capacity | 230 Ah / 3,000 Wh |
AMPS/Current Rating | Max. charge: 230 A; continuous discharge: 200 A |
Spec Sheet | View Manufacturer Spec Sheet |
- Chemistry: lithium iron phosphate (LiFePO4)
- Nominal voltage: 13.2V
- Capacity: 230Ah / 3,000Wh
- Maximum charging current: 230A (recommended 80A or less)
- Maximum continuous discharge current: 200A
- Peak discharge: 1,800A for 10 seconds
- Communications: MasterBus, CZone, NMEA 2000
- BMS and monitoring: integrated
- External safety relay: mandatory
- Protection: IP65 (electronics cabinet)
- Terminals: M8
- Dimensions (L × W × H): 341 × 197 × 355 mm (13.4 × 7.8 × 14.0 in)
- Weight: 25.4 kg (56.0 lb)
- Cycle life: 3,500 cycles at 80% DOD under stated manufacturer conditions
Call for pricing. No exact SKU match in the Wards retail price export dated August 27, 2026.
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