Collection: Battery Management

Reliable power starts with a well-managed battery system.

Explore marine battery management solutions designed to help boaters monitor, charge, protect and control onboard battery systems. From everyday cruising to extended time on the water, dependable battery management helps keep essential equipment powered and ready when you need it.

Shop marine battery chargers, battery monitors, battery switches, isolators, relays, charge controllers, battery accessories and power-management components for maintaining and upgrading your vessel's electrical system.

Whether you're replacing an existing component, improving battery monitoring or building a more capable onboard power system, Roam & Harbor makes it easier to find dependable marine electrical equipment for your next project.

Manage your power. Protect your adventure.

243 products

  • Save $32.95 USD
    Perko

    Perko Medium Duty Battery Disconnect Shut Off/On - 250 Amp Continuous, 12-32VDC [9601DP]

    Regular price $65.99 USD
    Sale price $65.99 USD Regular price $98.94 USD

    Medium Duty Battery Disconnect SwitchPart #: 9601DPFeatures: Ignition Protected For use with 12, 24 and 32 Volt Marine Electrical Systems Capacity - 250 Amps Continuous &...

  • Save $91.00 USD
    Guest

    Guest 2300A Diesel Power Battery Selector Switch [2300A]

    Regular price $197.99 USD
    Sale price $197.99 USD Regular price $288.99 USD

    Diesel Power Battery Selector SwitchProduct Features Polycarbonate case For 6, 12, 24 or 36 Volt systems Alternator field disconnect (AFD) allowing selection of any position including...

  • Save $5.00 USD
    Blue Sea Systems

    Blue Sea 6006200 Battery Switch Mini ON/OFF - Black [6006200]

    Regular price $42.99 USD
    Sale price $42.99 USD Regular price $47.99 USD

    6006200 - Blackm-Series (Mini) Battery Switch Single Circuit ON/OFF Switches a single battery to a single load group Multiple switches can be used to manage several...

  • Save $7.00 USD
    Blue Sea Systems

    Blue Sea 9001e e-Series Battery Switch Selector [9001E]

    Regular price $56.99 USD
    Sale price $56.99 USD Regular price $63.99 USD

    9001e e-Series Battery Switch Selector Features: Make-before-break contact design allows switching between battery banks without power interruption CE Marked Ignition protected - Safe for installation aboard gasoline...

  • Save $156.00 USD
    Victron Energy

    Victron Lynx Smart BMS 500 M10 Battery Management System [LYN034160210]

    Regular price $884.00 USD
    Sale price $884.00 USD Regular price $1,040.00 USD

    Lynx Smart BMS 500 M10 Battery Management SystemThe Lynx Smart BMS is a dedicated Battery Management System for Victron Lithium Smart Batteries. There are multiple BMS-es...

  • Save $215.10 USD
    Victron Energy

    Victron SmartSolar MPPT 450/100-MC4 VE.Can VE.Direct 450/100 [SCC145110510]

    Regular price $1,218.90 USD
    Sale price $1,218.90 USD Regular price $1,434.00 USD

    SmartSolar MPPT 450/100-MC4 VE.Can VE.Direct 450/100The SmartSolar MPPT RS solar charge controllers are Victron's solution for systems with large series connected PV arrays charging 48 V...

  • Save $62.42 USD
    Xantrex

    Xantrex 60 AMP MPPT Charge Controller [710-6048-01]

    Regular price $535.99 USD
    Sale price $535.99 USD Regular price $598.41 USD

    60 AMP MPPT Charge ControllerEnhanced Energy Optimization & SmartSolar Performance.The Xantrex Solar Charger Controller MPPT60 delivers superior efficiency and performance, supporting up to 150V and 60A...

  • Save $8.70 USD
    Victron Energy

    Victron CYRIX-CT 12/24V-120A Intelligent Battery Combiner [CYR010120011R]

    Regular price $49.30 USD
    Sale price $49.30 USD Regular price $58.00 USD

    CYRIX-CT 12/24V-120A Intelligent Battery CombinerThe Cyrix Battery Combiner is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one of them has...

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