The Blue Sea Systems e-Series Dual Circuit Plus™ Battery Switch (Part No. 5511E) is a premium marine battery management switch designed to safely control two isolated battery banks while providing the flexibility to combine them when needed. Ideal for boats with separate starting and house batteries, this switch allows you to isolate or connect battery banks without interrupting power to essential onboard systems.

Featuring a make-before-break contact design, the 5511E ensures continuous power during switching, helping protect sensitive marine electronics from power loss. Its ignition-protected construction makes it safe for installation on gasoline-powered boats, while the versatile housing supports both surface and rear panel mounting for a clean, professional installation.

Built for reliability in demanding marine environments, the Blue Sea Systems 5511E is an excellent choice for recreational boats, fishing vessels, cruising yachts, and commercial marine applications.

Key Features

• Genuine Blue Sea Systems e-Series Battery Switch

• Part Number: 5511E

• Controls two isolated battery banks

• Combines battery banks for emergency starting or charging

• Make-before-break design prevents power interruption during switching

• Ignition protected for gasoline-powered boats

• Heavy-duty marine-grade construction

• Surface or rear panel mounting options

• Corrosion-resistant materials for long service life

• Ideal for dual battery marine electrical systems

Ideal Applications

• Dual battery systems

• Starting and house battery management

• Fishing boats

• Cruising yachts

• Powerboats

• Commercial marine vessels

• Marine electrical installations

Shiptech Marine Ltd supplies genuine Blue Sea Systems battery switches, marine electrical components, battery management solutions, and premium boating accessories for recreational and commercial vessels.