Manual Battery Switches Automatic Charging Relays Add-A-Battery Kit

Add-A-Battery Kit - 120A

PN 7650
Don’t get stranded  – Add a Battery!  

Adding a second battery to the electrical system prevents the unintended discharge of the engine start battery.


Blue Sea Systems popular Add-A-Battery kit was primarily designed for boats with alternator output of 120A or less.


When installed, the Add-A-Battery isolates the start battery from the house loads which prevents the discharge of the start battery. The Add-A-Battery offers a simple way to control the charging and battery switching of two battery banks. The E-Series Dual Circuit Plus™ Battery Switch simplifies the switching while the SI-ACR automates charging between two batteries.

Weight2.36lb (1.07 kg)
1 7610 SI-ACR Automatic Charging Relay - 12/24V DC 120A
1 5511e e-Series Dual Circuit Plus™ Battery Switch
Included With
8343060e-Series Battery Management - Merchandising Display
Meets the following Regulatory Specifications
CE Marked
ISO 8846
Batteries isolated
Batteries combined through ACR
Batteries combined through Battery Switch

Batteries isolated

Battery switch - ON position
Power available to House and Start circuits

Engine off - No charge present
ACR - Open

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