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 4013 CableCap - Black 0.50 Stud [4013]
    Blue Sea 4013 CableCap - Black 0.50 Stud [4013]
    Blue Sea 4013 CableCap - Black 0.50 Stud [4013]
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    $5.79
    Regular price
    $6.99
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    $5.79
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  • Blue Sea 4012 CableCap - Red 0.50 Stud [4012]
    Blue Sea 4012 CableCap - Red 0.50 Stud [4012]
    Blue Sea 4012 CableCap - Red 0.50 Stud [4012]
    Regular price
    $5.79
    Regular price
    $6.99
    Sale price
    $5.79
    Add to cart
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  • Blue Sea 4011 CableCap - Black 0.70 to 0.30 Stud [4011]
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  • Blue Sea 4010 CableCap - Red 0.70 to 0.30 Stud [4010]
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  • Blue Sea 4009 CableCap - Black 0.47 to 0.13 Stud [4009]
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  • Blue Sea 4008 CableCap - Red 0.47 to 0.13 Stud [4008]
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  • Blue Sea 4006 Standard CableCap - Large Pair [4006]
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  • Blue Sea 4005 Standard CableCap - Small Pair [4005]
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  • Blue Sea 4001 Rotating Single Entry CableCap - Small Pair [4001]
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  • Blue Sea 3003 HD-Series Battery Switch Selector w/Alternator Field Disconnect [3003] Blue Sea 3003 HD-Series Battery Switch Selector w/Alternator Field Disconnect [3003]
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  • Blue Sea 3002 HD-Series Battery Switch Selector [3002] Blue Sea 3002 HD-Series Battery Switch Selector [3002]
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  • Blue Sea 3001 HD-Series Battery Switch Single Circuit ON/OFF w/AFD [3001] Blue Sea 3001 HD-Series Battery Switch Single Circuit ON/OFF w/AFD [3001]
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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.