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 $4.01 USD
    Newmar Power

    Newmar BI-100 Battery Integrator [BI-100]

    Regular price $280.99 USD
    Sale price $280.99 USD Regular price $285.00 USD

    BI-100 Battery IntegratorCharging multiple battery banks without the use of diode isolators dictates that the batteries be connected or “integrated” only whenever a charge voltage is...

  • Save $207.90 USD
    Victron Energy

    Victron Lynx Smart BMS 1000 Battery Management System f/Lithium Smart Batteries [LYN034170210]

    Regular price $1,178.10 USD
    Sale price $1,178.10 USD Regular price $1,386.00 USD

    Lynx Smart BMS 1000 Battery Management System for Lithium Smart BatteriesThe Lynx Smart BMS is a dedicated Battery Management System (BMS) for the Victron Lithium Battery...

  • Save $43.01 USD
    Newmar Power

    Newmar BI-200 Battery Integrator [BI-200]

    Regular price $463.99 USD
    Sale price $463.99 USD Regular price $507.00 USD

    BI-200 Battery IntegratorCharging multiple battery banks without the use of diode isolators dictates that the batteries be connected or “integrated” only whenever a charge voltage is...

  • Save $75.01 USD
    Newmar Power

    Newmar NP-12 Nav-Pac - 12V [NP-12]

    Regular price $812.99 USD
    Sale price $812.99 USD Regular price $888.00 USD

    NP-12 Nav-Pac - 12VMarine communication and navigation electronics such as programmable data transceivers, GPS, and other microprocessor-controlled devices require clean and steady DC input power. Their...

  • Save $64.01 USD
    Sea-Dog

    Sea-Dog Power Box Battery Switch [422737-3]

    Regular price $184.99 USD
    Sale price $184.99 USD Regular price $249.00 USD

    Power Box Battery SwitchThe Power Box is controlled with a 50A battery switch and monitored with an LED voltmeter. The switch features a removable knob for...

  • Save $35.25 USD
    Victron Energy

    Victron GX LTE 4G-A Cellular Modem f/GX Devices - North America Only [GSM100200400]

    Regular price $199.75 USD
    Sale price $199.75 USD Regular price $235.00 USD

    GX LTE 4G-A Cellular Modem for GX Devices - North America OnlyThe GX LTE 4G is an accessory for GX devices. It is a cellular modem...

  • Save $93.60 USD
    Victron Energy

    Victron BMV-710H Smart High Voltage Battery Monitor (60-385VDC) [BAM030710100]

    Regular price $530.40 USD
    Sale price $530.40 USD Regular price $624.00 USD

    BMV-710H Smart High Voltage Battery Monitor (60-385VDC)The BMV-710H Smart has Bluetooth built-in and can connect wirelessly to your phone (or tablet) via the VictronConnect App to...

  • Save $16.96 USD
    Sea-Dog

    Sea-Dog Heavy Duty On Off Battery Switch - 600A [422768-1]

    Regular price $98.99 USD
    Sale price $98.99 USD Regular price $115.95 USD

    Heavy Duty On & Off Battery Switch - 600AThe heavy-duty 422768 selector switch has 350A continuous and 1500 cranking amps to start a dual diesel engine....

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