Mastervolt
Mastervolt MLI Ultra Lithium Ion Battery (12V / 460Ah / 6000Wh)
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The Mastervolt MLI Ultra 12/6000 is a heavy-duty 12V Lithium Ion battery engineered for ultimate performance under the harshest conditions, including high charge and discharge currents, wet environments, mechanical shock and vibration. It pairs premium Lithium Iron Phosphate (LiFePO4) cells with a proprietary Mastervolt Battery Management System inside a sturdy, waterproof housing. With 460Ah of capacity and 6000Wh of energy, it is ideal for running heavy loads for long periods and delivers more than three times the lifespan of traditional batteries while saving up to 70 per cent in space and weight.
A self-learning balancing algorithm proactively balances each cell for faster, more efficient charging and longer service life, with fast charging possible within 60 minutes. Integrated battery monitoring tracks consumed Ah and state of charge, and MasterBus, CZone and NMEA 2000 communication allows full system integration. For safety, Mastervolt requires a safety relay to be fitted as a mandatory part of the installation.
PRODUCT DETAILS
- Heavy-duty Lithium Iron Phosphate (LiFePO4) cells with proprietary Mastervolt BMS
- 12V nominal, 460Ah capacity, 6000Wh nominal energy
- More than three times the lifespan of traditional batteries; saves up to 70 per cent in space and weight
- Self-learning balancing algorithm for optimised performance and longer life
- High charge / discharge rate up to 2.5 C; fast charging within 60 minutes
- Integrated battery monitoring (Ah consumed, state of charge)
- Series connection up to 10 batteries; unlimited parallel connection
- MasterBus, CZone and NMEA 2000 communication
- Waterproof electronics compartment; safety relay mandatory
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General
| Nominal battery voltage | 12 V |
| Nominal battery capacity | 460 Ah |
| Nominal battery energy capacity | 6000 Wh |
| Cycle life | 3500 cycles at 80 % DOD at 25 °C, max. C/3 charge and C/2 discharge |
| Max. charge current | 460 A |
| Recommended charge current | ≤ 160 A |
| Recommended continuous discharge current | ≤ 300 A |
| Maximum discharge current (20 mins @ 25 °C) | 500 A |
| Peak discharge current | 1800 A (10 sec.) |
| Battery monitoring | Integrated |
| MasterBus communication | Yes |
| CZone / NMEA 2000 communication | Yes |
| Terminals | M8 |
| Mounting position | Upright (recommended) or either long side |
| Compliance | CE, E-Mark, RVIA compliant |
Technical
| Battery chemistry | Lithium Iron Phosphate |
| Protection degree | IP65 (electronics cabinet) |
| Parallel connection | Yes, unlimited |
| Series connection | Yes, up to 10 batteries; systems over 48 V require a separate battery box |
| Protections | Over voltage, under voltage, over temperature |
| Safety relay | To be added mandatorily; controls integrated |
Physical
| Max. outer dimensions (l x w x h, incl. terminals/grip handles) | 622 x 197 x 355 mm (24.5 x 7.8 x 14.0 inch) |
| Product weight | 46.7 kg (103.0 lb) |
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- UK DoC MLI Ultra 12/3000, 12/6000 and 24/6000
- Type approval certificate (E-Mark) MLI Ultra 12/6000 & 24/6000
- EU Declaration of Conformity MLI Ultra
- Type approval certificate RVIA
- Quick start MLI Ultra 12/3000, 12/6000 and 24/6000
- User manual MLI Ultra 24/6000, 12/6000, 12/3000
- Performance and Durability - Mastervolt MLI Ultra 3000/6000 (EU Reg. 2023/1542)
- 3D drawing Li-ion battery MLI 5500 & 6000 (zipped STEP-file)



