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 $11.00 USD
    ARCO Marine

    ARCO Marine 1000A/50mV Shunt [ST1000]

    Regular price $76.95 USD
    Sale price $76.95 USD Regular price $87.95 USD

    1000A/50mV ShuntShunt 1000 Amp 50 mV - 1000A/50mV

  • Save $1.96 USD
    Sea-Dog

    Sea-Dog Rainbow Display Digital Voltmeter - Injection Molded Nylon - 5V-15VDC [421617]

    Regular price $34.99 USD
    Sale price $34.99 USD Regular price $36.95 USD

    Rainbow Display Digital Voltmeter - Injection Molded Nylon - 5V-15VDCThe Rainbow Display Digital Voltmeter gives the user quick, visual, color-coded voltage information. Red/orange means the voltage...

  • Save $15.15 USD
    Victron Energy

    Victron SmartShunt 300A IP65 Bluetooth Battery Monitor [SHU065130050]

    Regular price $85.85 USD
    Sale price $85.85 USD Regular price $101.00 USD

    SmartShunt 300A IP65 Bluetooth Battery MonitorThe SmartShunt is an all-in-one battery monitor, only without a display. Your phone acts as a display. The SmartShunt connects via...

  • Save $97.65 USD
    Victron Energy

    Victron SmartSolar MPPT 150/100-MC4 VE-Can [SCC115110511]

    Regular price $553.35 USD
    Sale price $553.35 USD Regular price $651.00 USD

    SmartSolar MPPT 150/100-MC4 VE-CanThe MPPT VE.Can SmartSolar charger uses the latest and fastest technology to convert energy from a solar array into energy that optimally charges...

  • Save $25.61 USD
    Egis Mobile Electric

    Egis Programmable Automatic Charging Relay (ACR) 160A, 12V [7610]

    Regular price $135.99 USD
    Sale price $135.99 USD Regular price $161.60 USD

    Programmable Automatic Charging Relay (ACR) 160A, 12VThis 160A Egis charging relay is automatic and programable. The relay eliminates dead start batteries by sharing charging on either...

  • Save $156.00 USD
    Victron Energy

    Victron Lynx Smart BMS 500 NG (M10) [LYN034160310]

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

    Lynx Smart BMS 500 NG (M10)The Lynx Smart BMS NG is a dedicated Battery Management System (BMS) designed specifically for the Victron Lithium NG batteries. These...

  • Save $207.90 USD
    Victron Energy

    Victron Lynx Smart BMS 1000 NG (M10) MGMT System [LYN034170310]

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

    Lynx Smart BMS 1000 NG (M10) MGMT SystemThe Lynx Smart BMS NG is a dedicated Battery Management System (BMS) designed specifically for the Victron Lithium NG...

  • Save $81.01 USD
    Newmar Power

    Newmar NP-24 Nav-Pac - 24V [NP-24]

    Regular price $878.99 USD
    Sale price $878.99 USD Regular price $960.00 USD

    NP-24 Nav-Pac - 24VMarine communication and navigation electronics such as programmable data transceivers, GPS, and other microprocessor-controlled devices require clean and steady DC input power. Their...

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