450 Ah 12 Volt 300 amp BMS - Solid State LiFePO4 High Power Density Battery w/ Replaceable BMS, Heat & NMEA 2000

Massive Power Capacity in a Compact Group 8D Footprint

This Group 8D size Solid State LiFePO4 battery stores 450 Amp Hours (5,760Wh) of usable power with a 300 amp continuous discharge and 600 amps for ten seconds. It measures approximately 20.5 x 10.6 x 8.7 inches (8D) and weighs approximately 95 pounds (43kg). The removable Smart BMS can be easily accessed or replaced with simple tools for improved long-term serviceability and reduced downtime while underway.

These batteries can be wired in series for 24, 36, or 48 volt systems. Up to sixteen batteries can be wired in parallel to create an extremely powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering marine house banks, large inverter systems, electric winches, windlasses, hybrid systems, off-grid power systems, RVs, and high-current onboard electrical loads.

This battery features advanced Solid State LiFePO4 cell technology designed to improve thermal stability, safety characteristics, cycle life, and operating performance. Additional features include integrated Bluetooth monitoring for iOS and Android devices, built-in heating for low temperature charging protection, Victron compatibility, and NMEA2000 communication for advanced onboard system integration.

The removable top design allows the BMS to be easily serviced or swapped out if needed, making this battery especially attractive for long-range cruising, expedition, and mission-critical power applications.

📦 $100 flat shipping rate on Electric Motors or 8D Batteries

Product Specifications

• Model: CMP205450-BHR300
• Chemistry: Solid State LiFePO4
• Voltage: 12.8
• Capacity Amp Hours: 450
• Watt Hours: 5,760
• BMS Continuous Draw Amps: 300A
• Bluetooth: iOS & Android
• Heating: Yes
• NMEA2000: Yes
• Victron Compatible: Yes
• Parallel Connection: Up to 16 batteries
• Series Connection: Up to 4 batteries
• Group Size: 8D
• Size Inches: 20.47 x 10.59 x 8.66
• Weight Lbs: 94.8
• Full Data Sheet

Key Features

Solid State LiFePO4 Technology

Advanced solid state lithium technology designed for:

• Improved thermal stability
• Enhanced safety characteristics
• Lower operating temperatures
• Long cycle life
• High-performance discharge capability

High Current Performance

Designed for demanding inverter and marine applications.
Performance Specifications:

• 300A continuous discharge
• 600A peak discharge (10 seconds)
• 300A continuous charge capability
• 225A recommended fast charging current

Ideal for:

• Large inverter systems
• High-current DC applications
• Windlasses
• Electric winches
• Heavy onboard loads

Field Replaceable Smart BMS

Unlike many sealed lithium batteries, the CMPower 450Ah includes a removable top design allowing access to the internal Smart Battery Management System (BMS).

Advantages include:

• Easier troubleshooting
• Reduced downtime
• Long-term serviceability
• Simplified maintenance
• Ability to carry a replacement BMS during extended trips

Built-In Protection Features:

• Over-charge protection
• Over-discharge protection
• Over-current protection
• Short circuit protection
• Temperature protection
• Low-temperature charging protection
• Active balancing

Bluetooth Monitoring

Integrated Bluetooth connectivity allows battery monitoring from compatible iOS and Android devices.
Monitor:

• State of charge
• Voltage
• Current
• Battery status
• System performance

NMEA2000 & Victron Compatible

Built-in NMEA2000 communication allows integration with compatible marine electronics and monitoring systems.

Compatible with:

• Victron systems
• Marine display networks
• Advanced onboard monitoring systems

Internal Heating System

Integrated battery heating system helps protect the battery during cold-weather charging.
When battery temperature falls below 0°C (32°F), incoming charger power is redirected to the internal heating blanket until proper charging temperature is reached.

Important:

• Battery heating operates from charger input power
• Battery does not self-heat while idle

Designed for Scalable Power Systems

Supports:

• Up to 16 batteries in parallel
• Up to 4 batteries in series
• Battery-to-battery balancing

Quality Control Features

CMPower batteries are built using strict quality control standards designed for long-term reliability. Includes:

• Automatic cell welding
• Strict cell matching standards
• 100% cycle testing before shipment
• Unique battery tracking numbers
• Active balancing system
• Replaceable Smart BMS

Applications

Ideal for:

• Marine house banks
• Sailboats
• Yachts
• Catamarans
• RVs
• Van conversions
• Off-grid cabins
• Energy storage systems
• Mobile power systems

Included

• CMPower 12.8V 450Ah Battery
• Secure mounting bracket

T-Class fuse and holder sold separately.