Description
The Blue Sea 5511e Dual Circuit Plus Battery Switch is a premium-grade solution designed for managing two independent batteries in marine, RV, or off-grid electrical systems. Whether you’re separating a starter battery from a house battery or integrating both for combined power, this switch provides robust and safe control over your battery setup.
This model features a “Combine” position, which allows both batteries to be connected in parallel—ideal for emergency starting or maximising available power. The make-before-break contact system ensures continuous power flow while switching between banks, preventing sudden drops or disconnection damage to sensitive electronics.
Built from marine-grade, corrosion-resistant materials, it’s safe for use in both petrol and diesel environments, being ignition protected. The unit can be surface-mounted or rear panel-mounted, giving you flexibility during installation.
This switch supports high amperage (up to 1000A cranking for 10 seconds) and operates up to 32V DC, making it compatible with most 12V and 24V systems. Terminal studs accept M10 (3/8") ring terminals and are torque rated for secure and reliable connections.
Key Features
- Dual Circuit Plus Design – Isolates starter and house batteries or combines them as needed
- “Combine” Function – Connects both batteries in parallel for extra power or emergency use
- Make-Before-Break Contact – Ensures no power interruption when switching
- Surface or rear panel mountable for flexible installation
- Marine-grade materials – Built for corrosion resistance in harsh environments
- Ignition protected – Suitable for both diesel and petrol applications
- High amperage ratings – Handles up to 1000A for cranking, 350A continuous
Specifications
- Attribute: Value
- Product Type: Dual Circuit Battery Switch
- Brand: Blue Sea Systems
- Model: 5511e E-Series
- Cranking Rating (10 sec): 1000A
- Intermittent Rating (5 min): 525A
- Continuous Rating: 350A
- Voltage (Max Operating): 32V DC
- Terminal Stud Size: 3/8"–16 (M10)
- Terminal Stud Torque: 140 in-lb (15.82 Nm) max
- Mounting Holes: Accept M6 screws
- Recommended Cable Size: 4/0 AWG (120mm²)
- Mounting Type: Surface or rear panel
- Ignition Protected: Yes
