Blue Sea Systems Add-A-Battery Kit, 120 Amp, Dual Circuit

Simplify power management and ensure reliable starts with the Blue Sea Systems Add-A-Battery Kit. This industry-standard solution provides comprehensive two-battery bank management, perfect for marine, RV, and off-grid applications. It automatically charges your house and start batteries from a single source while maintaining essential isolation, safeguarding your sensitive electronics and guaranteeing power for your journey. Upgrade your electrical system today for peace of mind and effortless control.

• Blue Sea Systems e-Series Dual Circuit Plus™ Battery Switch
• Blue Sea Systems 120 Amp SI-ACR Automatic Charging Relay

• Automated Battery Charging: The 120 Amp SI-ACR automatically combines batteries during charging, efficiently distributing power from your alternator without manual intervention.
• Start Battery Protection: Isolates the engine start battery from house loads, preventing unintended discharge and ensuring you always have power to crank your engine.
• Dual Circuit Plus™ Battery Switch: Offers intuitive ON, OFF, and COMBINE functions, allowing quick manual control of both battery banks.
• Emergency Starting Capability: Easily combine battery banks for emergency starting, providing crucial redundancy in critical situations.
• Ignition Protected: Rated safe for installation in engine compartments on gasoline-powered boats, meeting UL 1500 and SAE J1171 standards.
• Robust Environmental Protection: The Dual Circuit Plus™ switch is IP66-rated (dustproof and protected against heavy seas), and the SI-ACR is IP67-rated (protected against temporary immersion), ensuring durability in harsh marine environments.
• High Current Ratings: The Dual Circuit Plus™ switch boasts a 350A continuous rating (700A cranking), while the SI-ACR offers a 120A continuous rating (210A intermittent), handling demanding electrical loads.
• Tin-Plated Copper Studs: Provides maximum conductivity and corrosion resistance for long-lasting performance.
• Start Isolation Feature: Protects sensitive onboard electronics from damaging voltage sags and spikes during engine cranking.
• LED Status Indicator: Built-in visual diagnostics on the ACR help monitor voltage status and relay function for quick troubleshooting.

Ideal for marine vessels with dedicated start and house battery systems, recreational vehicles (RVs), camper vans, and off-grid solar or emergency backup setups requiring reliable dual-battery management.

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.