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

  • Bluewater

    Bluewater OFF/1/2 Battery Switch - Surface Mount - Red [9800-008-11]

    Regular price $43.54 USD
    Sale price $43.54 USD Regular price $0.00 USD

    OFF/1/2 Battery Switch - Surface Mount - RedThis 1/2/Off switch offers seamless selection between two power sources, with an Off position for isolation. It’s a reliable...

  • Bluewater

    Bluewater Off/On Combine Battery Switch w/o Base - Surface Mount - Red [9800-011-11]

    Regular price $30.22 USD
    Sale price $30.22 USD Regular price $0.00 USD

    Off/On Combine Battery Switch without Base - Surface Mount - RedThe Dual Circuit Plus switch builds on the standard dual circuit configuration by adding an emergency...

  • Bluewater

    Bluewater On/Off Switch Battery Switch - Panel Mount - Red [9800-006-10]

    Regular price $23.83 USD
    Sale price $23.83 USD Regular price $0.00 USD

    On/Off Switch Battery Switch - Panel Mount - RedSimple, reliable, and built for tough environments, this On/Off Battery Switch provides secure control of power to a single circuit....

  • Save $19.31 USD
    Egis Mobile Electric

    Egis E-Series 350A Battery Switch Off/On [2403]

    Regular price $41.99 USD
    Sale price $41.99 USD Regular price $61.30 USD

    E-Series 350A Battery Switch Off/OnSealed Against Dust & Water Intrusion - To ensure reliable circuit protection for the life of the electrical system installation.Ignition Protected -...

  • Egis Mobile Electric

    Egis E-Series 350A Dual Circuit Battery Switch Off/On [2410]

    Regular price $67.10 USD
    Sale price $67.10 USD Regular price $0.00 USD

    E-Series 350A Dual Circuit Battery Switch Off/OnSealed Against Dust & Water Intrusion - To ensure reliable circuit protection for the life of the electrical system installation.Ignition...

  • Save $10.51 USD
    Egis Mobile Electric

    Egis M-Series 300A Battery Switch Off/On Key Actuator [2305]

    Regular price $24.99 USD
    Sale price $24.99 USD Regular price $35.50 USD

    M-Series 300A Battery Switch Off/On Key ActuatorSealed Against Dust & Water Intrusion - To ensure reliable circuit protection for the life of the electrical system installation.Ignition...

  • Save $21.15 USD
    Victron Energy

    Victron BatteryProtect 48V - 100A [BPR048100400]

    Regular price $119.85 USD
    Sale price $119.85 USD Regular price $141.00 USD

    BatteryProtect 48V - 100AThe BatteryProtect disconnects the battery from nonessential loads before it is completely discharged (which would damage the battery) or before it has insufficient...

  • Save $7.00 USD
    Commodore

    Commodore 4-Position Compact Dual Battery Selector Switch [CM-402S]

    Regular price $42.99 USD
    Sale price $42.99 USD Regular price $49.99 USD

    4-Position Compact Dual Battery Selector SwitchThe 4-Position Battery Selector Switch is the ultimate solution for managing multiple battery banks in marine or RV electrical systems. Designed for 12V...

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