CUSTOM MARINE BATTERY SYSTEMS

Custom Marine Lithium Battery Systems for Electric Propulsion

48V, 72V, 96V, 144V and 300V–700V battery systems engineered around your motor, range, installation space and vessel requirements.

For electric outboards, sailboats, yachts, workboats and passenger or commercial vessels.

  • IP67 Enclosure Options
  • High-Current BMS
  • CAN Integration
  • Custom Mechanical Design
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Bonnen 96V twin marine battery system mounted in a compact protected vessel machinery compartment
Illustrative integration scene created from supplied Bonnen 96V battery references.

ENGINEERING PROJECT REVIEW

Tell Us About Your Boat Project

Not sure about the voltage, battery capacity or every technical detail? No problem. Share what you know—even if it is only the motor model or power—and our engineers can help define the next step.

    Your current project information is enough to start an initial engineering review.

    VOLTAGE PLATFORM SELECTOR

    Choose the Marine Battery Platform for Your Propulsion System

    Final specifications are selected from motor voltage, continuous and peak power, target runtime, available space and integration requirements.

    Bonnen 48V and 72V marine battery enclosure families shown as separate paired systems

    LOW-VOLTAGE PROPULSION

    48V–72V Marine Battery Systems

    A configurable 48V marine battery or 72V marine battery platform for electric outboards, tenders, sailboats, pontoon boats and small electric boats.

    • 48V / 51.2V / 72V
    • Custom Ah and kWh
    • High-current configurations available
    • CAN / RS485 options
    • IP67 enclosure options
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    Bonnen 96V twin battery system and separate 144V low-profile marine battery enclosure

    HIGH-POWER PROPULSION

    96V–144V Marine Battery Systems

    A 96V boat battery, 96V marine lithium battery or 144V marine battery architecture for higher-power outboards, performance boats, workboats and larger electric vessels.

    • 96V / 102.4V / 115.2V / 144V
    • Custom energy and discharge current
    • Single-pack or multi-pack architecture
    • CAN integration
    • Marine enclosure options
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    One complete Bonnen 500V–700V high-voltage marine battery system installed as a unified platform

    HIGH-VOLTAGE ARCHITECTURE

    300V–700V High-Voltage Marine Batteries

    A high voltage marine battery platform for electric yacht battery systems, workboats, passenger vessels and commercial vessel battery system projects.

    • 300V–700V custom HV platforms
    • Modular battery architecture
    • HV control and insulation monitoring options
    • CAN communication
    • Project-specific thermal management
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    ENGINEERING REFERENCE POINTS

    Representative Marine Battery Configurations

    These examples show practical engineering foundations, not stocked products. Final voltage, capacity, current, dimensions and communication are configured for the vessel and propulsion system.

    EXAMPLE CONFIGURATION · 48V CLASS

    51.2V 230Ah

    Energy
    11.8kWh
    Continuous
    230A
    Peak
    500A
    Enclosure
    IP67

    EXAMPLE CONFIGURATION · 96V CLASS

    96V 200Ah

    Energy
    19.2kWh
    Current
    Configured to motor requirements
    Communication
    CAN available
    Enclosure
    IP67

    EXAMPLE CONFIGURATION · HV CLASS

    300V–700V Custom HV Platform

    Energy
    Custom kWh
    Architecture
    Modular
    Control
    CAN and HV system control
    Thermal
    Project-specific strategy

    SYSTEM INTEGRATION

    A Battery System Engineered Around Your Boat

    A marine propulsion battery is defined by the complete electrical and mechanical system—not voltage alone.

    1. 01Charging SourceProject-defined input
    2. 02Battery SystemBMS protection and switching
    3. 03Motor ControllerCAN-compatible interface
    4. 04Electric MotorPropulsion load

    The diagram describes interfaces; third-party charging, controller and motor equipment remain project-specific.

    Bonnen 144V low-profile battery with discharge cable connected to its dedicated orange discharge interface

    Inputs Our Engineers Evaluate

    • Motor voltage
    • Continuous and peak motor power or current
    • Target cruising time, duty cycle or range
    • Available battery compartment dimensions
    • Weight distribution and mounting constraints
    • Charging source, power and desired charge time
    • CAN/RS485 communication and controller compatibility
    • Temperature, humidity, salt exposure and service access

    If some project data is not available yet, send the motor model and the information you already have. We can help identify the remaining inputs.

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    MARINE ENGINEERING PRIORITIES

    Built for Marine Propulsion

    Marine Enclosure Design

    IP67 enclosure options, sealing details, structural support and mounting are confirmed against the vessel environment and installation.

    Grade-A Prismatic Cells

    Cell matching, traceability and chemistry selection are evaluated for the required energy, current and operating profile.

    High-Current BMS

    Continuous and peak current, protection thresholds, contactors and HV architecture are configured around propulsion demand.

    CAN Integration

    Communication is matched with the motor controller, charger and vessel system interfaces defined for the project.

    Custom Mechanical Design

    Enclosure geometry considers compartment size, mounting points, service clearance and onboard weight distribution.

    Thermal Management

    Passive or active thermal strategies are selected from power, duty cycle, ambient conditions and installation constraints.

    PROPULSION APPLICATIONS

    Marine Applications

    Electric outboard boat, sailboat, pontoon, workboat, yacht and passenger vessel in a working harbour
    Illustrative vessel scene; not a customer installation.

    Electric Outboards & Small Boats

    Compact systems are configured around outboard voltage, peak current, runtime and available onboard space.

    Sailboats & Tenders

    Battery architecture balances quiet propulsion, charging windows, packaging and dependable low-speed operation.

    Pontoon Boats

    System sizing considers cruising duty, passenger load, deck arrangement and the selected electric drive.

    Workboats

    Commercial duty cycles drive decisions on usable energy, peak load, service access and charging strategy.

    Electric Yachts

    Higher-voltage modular systems can be engineered around propulsion power, range, space and vessel integration.

    Passenger & Commercial Vessels

    Project-specific architectures coordinate HV control, communications, thermal needs and operational schedules.

    PROJECT DEVELOPMENT

    From Motor Specifications to a Production-Ready Battery System

    1. 01

      Project Review

      Collect motor, runtime, space, charging and communication information.

    2. 02

      Electrical & Mechanical Design

      Confirm architecture, BMS, drawings, mounting and system interfaces.

    3. 03

      Prototype & Validation

      Build samples and complete project-relevant checks against confirmed requirements.

    4. 04

      Production & Delivery

      Support production, documentation and dangerous-goods shipping preparation.

    PROJECT SUPPORT

    Engineering Support from Initial Review to Global Delivery

    ENGINEERING

    10+ Years of Battery Engineering Experience

    Electrical and mechanical design support extends from early requirements through prototypes and small-batch projects.

    MANUFACTURING

    Controlled Pack Assembly

    Cell matching and traceability, pack assembly, end-of-line checks and ISO 9001 quality management support repeatable production.

    DOCUMENTATION & SHIPPING

    Prepared for Global Project Delivery

    UN38.3/MSDS documentation is available alongside dangerous-goods packaging and sea or air shipping options.

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    FAQs About Custom Marine Lithium Battery Systems for Electric Propulsion

    You need more than just a single lithium ion battery pack​. You need a veteran manufacturer who has been in the field for 10+ years to save your project time, build your brand and grow your profits. Let Bonnen Battery help you achieve business success.

    Yes. You do not need to know the exact battery voltage, Ah or kWh before contacting us. Send us the motor model, rated voltage, continuous and peak power if available, and any information you already know about your boat. Our engineers can use this information as the starting point for selecting a suitable marine lithium battery system.

    The battery voltage normally needs to match the electrical architecture of your propulsion system, especially the motor controller. Bonnen develops 48V, 51.2V, 72V, 96V, 102.4V, 115.2V, 144V and custom 300V–700V marine battery systems. We review your motor voltage, power, controller requirements and vessel configuration before recommending the final battery architecture.

    The required battery capacity depends on much more than motor power. We normally consider cruising power, target operating time or range, boat type, passenger or payload conditions, available installation space and charging opportunities. For example, a 30 kW motor does not necessarily require 30 kWh for one hour of operation because actual cruising power may be much lower than maximum motor power.

    Yes. Bonnen can engineer a custom marine battery around an existing motor and controller. We evaluate motor voltage, continuous power, peak power or current, controller limits, communication requirements and desired runtime before defining the battery voltage, capacity, discharge current and BMS configuration.

    Yes. We develop configurable low- and medium-voltage marine battery systems including 48V/51.2V, 72V, 96V/102.4V, 115.2V and 144V architectures. Capacity, discharge current, enclosure dimensions, communication and mechanical installation can be configured around the electric propulsion system and available onboard space.

    Yes. Bonnen develops custom 300V–700V high-voltage marine battery systems for applications such as electric yachts, workboats, passenger vessels and commercial electric vessels. Depending on the project, the system can use a modular architecture with high-voltage control, insulation monitoring, CAN communication and project-specific thermal management.

    Yes. Custom mechanical design is an important part of our marine battery engineering process. We can evaluate the available battery compartment dimensions, mounting points, service clearance, weight distribution and cable or connector locations, then design the battery enclosure around the installation instead of requiring the boat to fit a standard battery box.

    Yes. A multi-pack architecture can be considered when one large battery cannot fit the available space or when the vessel layout requires the battery mass to be distributed between different locations. Our engineers will evaluate the electrical connection, BMS architecture, protection, communication, current sharing and mechanical installation before defining the final configuration.

    IP67 enclosure options are available for our custom marine battery systems. The final protection level and enclosure design are confirmed according to the installation environment, sealing requirements, mounting arrangement and service needs of the vessel. If the battery will be exposed to water, high humidity or demanding marine conditions, tell us during the engineering review.

    Marine battery systems can be engineered with salt exposure, humidity, sealing and enclosure protection taken into consideration. The exact enclosure materials, surface treatment, sealing strategy, connectors and mounting design should be selected according to where the battery will be installed and how severe the marine environment is.

    Yes. CAN integration is available, and RS485 can also be considered for applicable projects. We review the communication requirements of the motor controller, charger and other vessel systems and determine how the battery BMS should exchange information such as voltage, current, state of charge, alarms and operating status.

    We size the battery current capability from the actual propulsion demand rather than voltage or kWh alone. Our engineers evaluate the motor’s continuous power, peak power, controller current limits, acceleration or high-load periods and duty cycle, then configure the cells, busbars, BMS, contactors and protection system to support the required operating current.

    Yes. Charging is considered as part of the overall battery system design. Tell us your available charging source, required charging time and onboard electrical architecture. We can evaluate the required charging voltage and power and coordinate the battery communication and charging interface with the project requirements.

    Yes. Custom marine battery projects can begin with engineering review, electrical and mechanical design, followed by prototype and validation before production. This approach is especially useful for new electric boat designs, conversions and projects where the battery needs to be verified against the actual installation, motor and controller before a larger production order.

    Send whatever information you currently have. The most useful details are boat type, motor model, motor voltage, continuous and peak power or current, desired cruising time or range, available battery compartment dimensions, charging requirements, communication requirements and expected quantity. If some of these details are not available yet, that is fine—we can start with the motor specifications and help identify the remaining requirements.

    START WITH WHAT YOU KNOW

    Send Us Your Motor Specifications—Even If the Project Is Still Early

    Share the voltage, power, target runtime and available space you know today. Our team can help define the remaining battery requirements.

    Get My Battery Recommendation