Mastervolt 66015500 MLI Ultra 12V/5500W 400AH Lithium Battery
Mastervolt 66015500 MLI Ultra 12V/5500W 400AH Lithium Battery
SKU:MVT66015500
These are the last of the prior generation MLI 12V 5500 series. These are brand new batteries, tested by Mastervolt and available while supplies last. If you have older 12V 5500 batteries in your vehicle or vessel you can combine a new 5500 with an older 5500 for more capacity.
These batteries carry a full warranty.
This is a last time opportiunty to save $1000 and get a 5500 series while supplies last.
Details:
The MLI Ultra from Mastervolt is a premium battery for the harshest environments. With industry leading performance the MLI Ultra is ideal in any system large or small that is looking to store more power. Used world wide in recreational, commercial, and emergency applications the MLI Ultra is designed to exceed your expectations.
Class leading discharge amperage and unlimited paralleling ability makes these batteries ideal for inverter systems and replacing or supplementing a generator. Integrated battery monitoring and communication allows you to know exactly what is happening to your battery with no external shunts or BMS. The result is a time remaining metric you can trust. Built in communication works with both Masterbus and Czone/NMEA 2000 systems so monitoring and control is simple.
Features:
- 12V
- 400Ah
- 5500Wh
- Lithium Iron Phosphate (LiFePO4)
- BMS and LiFePO4 cells according to the highest safety standards
- Integrated Battery Management System (BMS)
- Integrated battery monitoring and shunt (Amps, Volts, SoC, Ah consumed, Time remaining)
- Self learning and active balancing of lithium cells
- 70% savings in space and weight compared to lead acid
- High charge/discharge rate up to 2.5C
- Unlimited paralleling
- Up to 10 batteries in series
- IP65 water resistant
Additional Products Required: (Not Included)
MLI Ultras are required to be installed with an external safety disconnect relay. The relay is controlled from the battery but due to the large amperage capability of the battery must be mounted externally. For parallel applications 1 relay is required per battery, for series connections 1 relay is required per bank of series connected batteries. Compatible products are Blue Sea Systems ML-RBS PN: 7700 or MLI Ultra Connection Kit PN: 79007712.
Programming is required to integrate the MLI ultra into any system. To program, a USB Interface tool is required.
Ordering:
MLI Ultra batteries are intended to be part of an integrated system and are not designed for "drop in" applications. If you wish to purchase an MLI Ultra please call us to discuss the system prior to placing your order.
For systems with one Mastervolt device we recommend the Smart Remote
For systems with two or more Mastervolt devices we recommend the Easy View Five Monitor
Secure your new battery with our high quality hold down trays.
Check out our example systems that incorporate lithium batteries.
For environmental protection such as water or steam use this installable plug kit.
Specifications
Specifications
Nominal battery voltage: 13.2 V
Nominal battery capacity: 400 Ah
Nominal battery energy capacity: 5500 Wh
Cycle life: 3500 cycles at 80 % DOD at 25 ⁰C, max. C3 charge and C2 discharge
Max. charge current: 400 A
Recommended charge current: ≤ 120 A
Max. continuous discharge current: 500 A
Maximum continuous charge current: 200 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
Max. outer dimensions (incl. terminals/grip handles), lxwxh:
622 x 197 x 355 mm. 24.5 x 7.8 x 14.0 inch
Product weight: 55 kg 121.3 lb
Shipping weight: 60 kg 132.3 lb
Compliance: CE, E-Mark / RVIA Compliantt / DNV-GL pending
Installation Details
Installation Details
Terminal Stud Size: M8
Ring Terminal Fitment: 5/16in
Weight: 103lb
Length: 24.5in
Width: 7.8in
Height: 14.0in
Can be mounted upright or laying on long side
Includes mounting straps
Installation Instructions:
To ensure safety and maintain the product warranty, the Mastervolt Installation Manual requires adherence to these foundational steps:Mounting: Secure the battery in an upright position (recommended) or on its long side using the built-in hold-down edges. Ensure the location is well-ventilated and away from direct heat sources.Safety Relay Integration: Wire a mandatory external 12V safety relay (like the Blue Sea Systems ML-RBS) between the battery positive terminal and your loads/charging sources.Control Communication: Connect the integrated Battery Safety Connector from the battery's internal BMS to the control side of the safety relay. This allows the BMS to automatically disconnect the system during a critical event (over-voltage, under-voltage, or over-temperature).Network Links: Connect your MasterBus or CZone communication cables to the integrated waterproof ports to sync the battery with your Mastervolt chargers.Torque Specification: Use insulated tools to connect your heavy-duty power cables to the M8 battery terminals, tightening exactly to the specified torque settings.
Pelagic Power Tip
Pelagic Power Tip
When paralleling lithium batteries it is critical that the positive wires are identical lengths and the negative wires are identical length. The positive and negative do not need to match but all wires of the same polarity should match. It is recommended that you run only 1 wire to each terminal (positive and negative) and parallel at a bus bar instead of daisy chaining between terminals. This ensures secure connections and same length wires.
The reason matching wire lengths is important, is in lithium systems the amperages are commonly much higher than lead acid. Since electrons will take the path of least resistance a shorter wire will have more current run through it. Since the amperages are larger any imbalance is amplified. Over time, this imbalance reduces the life of the batteries and impacts their performance.
When properly installed and charged these batteries can last a long time. We know of customers still running strong on batteries over 10 years old.
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