Blue Sea Systems

Marine power, done right

Blue Sea Systems

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Dependable electrical for the water

Build a cleaner, safer onboard power system with marine-grade switches, protection, and distribution components that are made to work together.

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Blue Sea 2011 PowerPost Mini High Amperage Cable Connector - 1/4" Stud [2011] (Open Box)
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861 products

861 products

  • Blue Sea 7197 A-Series White Toggle Circuit Breaker - Single Pole 2.5A [7197]
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  • Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black [6004200] Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black [6004200]
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  • Blue Sea 6004 Single Circuit ON-OFF w/Locking Key - Red [6004] Blue Sea 6004 Single Circuit ON-OFF w/Locking Key - Red [6004]
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  • Blue Sea 5502100 Class T Fuse Block w/Insulating Cover - 225 to 400A [5502100]
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  • Blue Sea 5196 MRBF Surface Mount 3 Circuit Fuse Block - Common Source [5196]
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  • Blue Sea 5194 MRBF Surface Mount 3 Circuit Fuse Block - Independent Source [5194]
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  • Blue Sea 5007100 Class T Fuse Block w/Insulating Cover - 110 to 200A [5007100]
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  • Blue Sea 1839 M2 OLED Tank Monitor [1839]
    Blue Sea 1839 M2 OLED Tank Monitor [1839]
    Blue Sea 1839 M2 OLED Tank Monitor [1839]
    Regular price
    $265.79
    Regular price
    $363.99
    Sale price
    $265.79
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  • Blue Sea 1821 Universal Temperature Sensor [1821]
    Blue Sea 1821 Universal Temperature Sensor [1821]
    Blue Sea 1821 Universal Temperature Sensor [1821]
    Regular price
    $17.79
    Regular price
    $21.99
    Sale price
    $17.79
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  • Blue Sea 1741 Mini OLED Temperature Meter [1741]
    Blue Sea 1741 Mini OLED Temperature Meter [1741]
    Blue Sea 1741 Mini OLED Temperature Meter [1741]
    Regular price
    $66.79
    Regular price
    $90.99
    Sale price
    $66.79
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  • Blue Sea 1732 Mini OLED Ammeter [1732]
    Blue Sea 1732 Mini OLED Ammeter [1732]
    Blue Sea 1732 Mini OLED Ammeter [1732]
    Regular price
    $83.79
    Regular price
    $113.99
    Sale price
    $83.79
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  • Blue Sea 1479 360 Panel - 120V AC DUal Outlet [1479]
    Blue Sea 1479 360 Panel - 120V AC DUal Outlet [1479]
    Blue Sea 1479 360 Panel - 120V AC DUal Outlet [1479]
    Regular price
    $199.79
    Regular price
    $272.99
    Sale price
    $199.79
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About Blue Sea Systems

Blue Sea Systems builds marine-grade AC and DC electrical products designed to make boating safer and more reliable. Based in Bellingham, Washington, the brand is known for practical engineering that helps boaters and builders create clean, serviceable electrical systems that hold up in harsh conditions.

Their catalog covers the core building blocks of onboard power, including battery switches, automatic charging relays, fuse blocks, bus bars, circuit breakers, meters, and power distribution panels. Whether you are rigging a small skiff, upgrading a cruising sailboat, or wiring a specialty vehicle, Blue Sea components are made to work together as a complete system.

At Lotz Outdoors we stock Blue Sea Systems because dependable electrical is not optional on the water. If you are chasing a tidy install, easy troubleshooting, and confidence when the weather turns, this is the hardware that helps you get there.

Warranty

Satisfaction guarantee and product-specific warranty coverage

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Blue Sea Systems Customer Service

800-222-7617

For product-specific support, warranty claims, and technical questions, contact the brand directly.