Blue Sea 8689 m-Series Dual Circuit Plus Battery Management Panel – Triple Bank (2x PN 6011 Switches)

Optimize your vessel’s power system with the Blue Sea Systems 8689 Triple Battery Bank Management Panel, engineered for advanced control of multiple battery banks in demanding marine environments. Designed specifically for twin-engine and multi-bank applications, this panel integrates two m-Series Dual Circuit Plus™ battery switches (PN 6011) for reliable power distribution and seamless operation.

The Blue Sea 8689 allows you to isolate engine and house circuits, ensuring critical systems remain protected while enabling emergency battery combining when needed. Built with marine-grade components, it also provides main and 24-hour circuit protection, safeguarding electronics from voltage drops and spikes during engine start. 

Supporting both 12V and 24V DC systems, this panel delivers a robust 300A continuous rating, making it ideal for high-demand marine electrical setups. The pre-wired, compact design simplifies installation while maintaining clean, professional wiring at the helm or control station.

Key Features:

• Twin Engine Optimization: Features two Dual Circuit Plus™ switches. This allows for the independent management of two engines while keeping a shared house bank isolated to prevent power sags that can crash GPS or sonar units during startup.

• Triple Bank Management: Provides a centralized hub to switch three battery banks (Port Start, Starboard Start, and House) with the ability to emergency combine banks if one starting battery fails.

• Enhanced Circuit Protection: Includes a 100A C-Series flat rocker breaker for main DC loads and three 15A push-button thermal breakers—one more than the 8686—for 24-hour critical circuits like bilge pumps and security systems.

• Charging Automation Ready: Just like the 8686, this panel is designed to work seamlessly with an Automatic Charging Relay (ACR) to automate the charging of all three banks from your alternators without manual switching.

• Safety Rated: Fully Ignition Protected (SAE J1171), making it safe for mounting in gasoline engine compartments where fumes may be present.

• Includes (2) m-Series Dual Circuit Plus™ switches (PN 6011)

• Designed for triple battery bank / twin engine systems

• Isolates engine and house circuits for system protection

• Emergency cross-connect capability between battery banks

• 300A continuous rating (32V max) for high-load applications

• Integrated circuit protection:

  • (1) 100A C-Series breaker

  • (3) 15A push-button reset breakers 

• Protects sensitive electronics from voltage sags during cranking

• Pre-wired panel for easier installation and clean layout

Applications:
Perfect for twin-engine boats, offshore vessels, yachts, and complex marine electrical systems requiring reliable multi-bank battery management.

Why Choose Blue Sea Systems?
Blue Sea is a trusted leader in marine electrical solutions, known for durability, safety, and professional-grade performance in harsh marine conditions.

Installation Tip: When wiring a twin-engine system, ensure your house bank is sized appropriately to handle the combined parasitic loads of your electronics and the 24-hour circuits. If you frequently fish at night or run high-draw pumps, consider using a Deep Cycle bank for the house side and Cranking batteries for the engine sides.

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Manufacturer : Blue Sea Systems
Manufacturer Part No : 8689
UPC : 632085086893