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Blue Sea Systems Add-A-Battery Kit

Product Description

The Dual Circuit Plus Battery Switch isolates the engine and house circuits, and combines the battery banks for emergency starting. Meets American Boat and Yacht Council (ABYC) requirements for battery switches. The 120A SI ACR automatic charging relay combines batteries for charging and at the same time protects sensitive electronics by temporary isolation of house loads from engine circuit during engine cranking.

12/24 auto ranging voltage input and supports high-output alternators up to 120A. Waterproof rated IP67–temporary immersion for 30 minutes. Ignition protected and are safe for to use with gasoline type engines.

The ADD-A-BATTERY is as simple to operate as an ON-OFF switch, yet effectively manages the switching and charging of two batteries from a single charge source

Dual Circuit Plus™ Battery Switch

  • Simplifies switching
  • Isolates engine and house circuits
  • Combines batteries for emergency starting
  • Tin-plated copper studs for maximum conductivity and corrosion resistance


ACR Automatic Charging Relay

  • Automatically combines batteries during charging
  • Isolates batteries during engine cranking and when not charging
  • Shares the charge between two batteries more efficiently than a battery isolator
  • Allows efficient dual battery charging without needing regulator adjustment or rewiring

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