Charge two batteries away from the dock. Provides simplified switching with the Dual Circuit Plus™ Battery Switch and automated charging with the Automatic Charging Relay.

Simply operated with a single on-off switch, however switching and charging is managed from a single charging source to two batteries. Suitable for 12 or 24 volt systems with outboard engines and some inboard engines with alternator charge up to 65A.

• Single switch isolates both engine and loads
• Switch provides manual emergency start from house battery
• Automatically combines batteries while charging

The Add-A-Battery includes a Dual Circuit Plus™ Battery Switch and an Automatic Charging Relay. These components simplify switching and automate charging, so that all you have to do is turn the battery switch ON when you arrive and OFF when you leave.
 

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