Get Free Shipping on your order now! Don't miss out!
Home / Blue Sea-systems
1 of 2

What Makes Blue Sea Systems Different?

Blue Sea Systems engineers and manufactures electrical products for harsh environments in the marine, industrial, and heavy truck industries. Their engineered products are created by an in-house team of engineers who have experience in mechanical, electrical, industrial, electronic, and software design. Extensive testing is performed on all products. Blue Sea Systems' in-house lab is used to load test, thermal test, and water test products to ensure they will perform under marine conditions. Blue Sea System delivers innovative, reliable products for the marine industry.

Blue Marine Systems also manufactures supporting components including fuses, circuit breakers, and analog meters. They perform tests and have extensive specification and regulatory guidelines to assure that supporting components must comply with to assure these products should be incorporated into Blue Sea Systems products.


Blue Sea Systems uses tin-plated CDA 11000 electrical-grade copper rather than the lower cost brass alloys used by some manufacturers. Electrical copper can handle higher amperages at lower temperatures and are 250% more conductive than brass. Blue Seal Systems tin-plating adds additional performance by protecting the copper from corrosion that causes poor conductivity at connection points. The Blue Sea Systems tin-plated copper icon assures that the product is made of pure electrical grade copper.

360 Panel System

A versatile panel with a unique approach that offers significant advantages over traditional flat aluminum panels such as, flexibility, increased broadcast range of functionality, and advanced design features. This panel is both visually appealing and exhibits the functional demands of the most discerning boaters.

DC Main

Battery switches conduct current from battery banks to DC Main circuit protection, isolating potentially destructive energy when the boat is not in use or in emergency situations. Blue Sea Systems solenoid and remote battery switched allow the user to have remote electrical control over the battery banks rather than rely on proximal mechanical operation. Blue Marine Systems DC Main circuit protection devices have high ampere interrupt capacity (AIC), automatic charging relays (ACR) and distribute charging source energy to the battery banks.

Battery Switches

The purpose of a battery switch is to isolate potentially destructive energy in the battery banks when the boat is not oin use or during an emergency. The UL standard for marine battery switches in UL 1107. Blue Sea Systems has created a test that measures a high amperage load imposed on a battery switch in the starting circuit under very difficult starting conditions. Blue Sea Systems batteries surpass the UL standard because in addition to being tested UL 1107, they are also tested to the higher cranking amperage.

Automatic Charging Relays

Charge Management Devices (CMDs) connects two battery banks when charging, while keeping the battery banks isolated from each other. An automatic charging relay is used when there are multiple battery bank systems. If one battery in depleted then there will be a charged battery bank available for engine starting. Battery Isolaters and Charging Relays are the two main charge managemnet devices used on a boat.

Battery Isolators are electrical one-way check valves taht allow current flow to the battery. Their disadvantage is that a voltage drop occurs when using diodes, which consume charging energy, create heat and cause batteries to be undercharged.

Automatic Charging Relays are the most popular method of achieving the same results as Battery Isolators by using a relay combined with a circuit that senses when a charging source is being applied to either battery.

Fuse Block and Fuses

What is the difference between an ANL and a Class T Fuse?
ANL Fuse Advantage:
  • Lower cost than Class T Fuses
  • Available in wider amperage range than Class T Fuses
  • Single mounting hole dimension allows all ANL Fuses to be used with the same fuse block
  • Fusible link window give visual indication of fuse being blown
  • Ignition protected makes it safe for installation aboard gasoline powered boats.
  • Class T Fuse Advantages:
  • The only UL 248-15 listed fuse commonly available in the marine industry
  • Very fast response to short circuits protects high amperage electronic equipment such as inverters

  • DC Branch

    The DC Branch circuit distributes from a single-cable high amperage DC Main circuit to multiple circuits carrying lower amperage s through smaller wires. Blue System DC Branch circuits typically carry currents below 50 Amperes to the load devices.

  • Waterproof Panels
  • Distribution Panels
  • Circuit Breakers
  • Fuse Blocks
  • Fuses

  • AC Main

    The AC Main power system creates a path from the ship's source of AC power to the AC branch distribution system. It begins at the AC power source, such as shore power, genset or an inverter power source and ends at the AC Branch circuit. An AC power source always has an AC AC Main circuit breaker near the power source.

  • A-Series Circuit Breaker Panels
  • 240 Volt C-Series Toggle Circuit Breaker Panel
  • A-Series Toggle Circuit Breakers
  • A-Series raised and Flat Rocker Circuit breakers
  • C-Series Toggle Circuit Breakers
  • C-Series raised and Flat Rocker Circuit Breakers
  • Residual Current Circuit Breakers (ELCI/RCBO)
  • A-Series Source Selection Circuit Breaker Panels
  • Rotary Switches and Panels

  • AC Branch and AC/DC Combination

    The AC Branch power system distributes high amperage current from a single cable into lower amperage's in multiple wires. It provides circuit protection and switching. It begins at the AC Main circuit, and ends at the AC load outlet.

  • A-Series Circuit Breaker panel
  • A-Series Toggle Circuit Breakers
  • A-Series Flat and restricted Off Rocker Circuit Breakers
  • C-Series Toggle Circuit Breakers
  • Combination AC/DC Circuit Breaker Panels

  • Accessories

    Blue Water Systems has accessories available for all above-deck waterproof panels and below-edck panels.
  • Weatherdeck Waterproof Panel Acessories
  • Contura Waterproof Circuit Breaker Panel Accessories
  • Panel Accessories
  • 12 Volt DC Socket-Plug System
  • Labels

  • Metering and Accessories

    Meters are used to monitor a boat's DC and AC electrical systems. Meters help the boater avoid overloads or shore cords, determine the proper time to charge battery banks, and know when alternators and chargers are not functioning properly. Analog meters are highly readable, DIN meters follow European style, and Blue Sea Systems digital mutimeters combine various meter functions into one convenient and splash-proof package.
  • DIN Meters
  • Analog Meters
  • Digital Meters
  • Meter Panels
  • Mini Clamp Multimeter
  • Shunts and Transformers

  • BusBars, Connectors, and Insulators

    BusBars and PowerPosts provide a safe and convenient way to insulate circuit wires and connect them together. Feed Through Connectors and CableClams enable the boater to safely pass wires through a bulkhead or deck. Insulated continuously-energized non-grounded conductors protect against accidental short circuits and shock hazards.
  • BusBars
  • Terminal Blocks
  • Connectors
  • PowerPosts
  • CableClams
  • CableCaps

  • The Industry Standard for Electrical BusBars

  • Snap on insulating cover attached to studs and allows unobstructed wire access
  • Raised bus provides easy access to multiple wires on a single screw
  • UL 94-VO rated base material resists high heat
  • Stainless steel Phillips screws for easier installation and resistance to stripping.
  • Pressed on busbar eliminates need for securing nut
  • Stainless steel studs allow high torquing for excellent electrical contact
  • Tin-plated copper bus for maximum conductivity and corrosion resistance
  • Recessed mounting holes eliminate accidental shorts to aluminum and steel mounting surfaces
  • Captive star type lock washers meet CE requirements for anti-rotation and eliminate handling of small, easily dropped parts