• Add-A-Battery Kit 7650 Dual Battery Management System
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Blue Sea Systems - ADD-A-BATTERY-7650

Add-A-Battery Kit 7650 Dual Battery Management System

Ideal for marine dual battery systems, caravans, 4WD touring rigs, camper trailers, and off-grid setups needing automatic battery management.

$359.95 AUD
$359.95 AUD
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  • Fast dispatch Australia-wide from Battery Force
  • Genuine Blue Sea Systems product
  • Trusted supplier of marine and off-grid power gear
  • Simplifies dual battery installations
  • Expert support available before and after purchase

The Blue Sea Systems Add-A-Battery 7650 is a premium dual battery management kit designed to simplify battery isolation and charging in marine, caravan, 4WD, and off-grid applications. Combining an SI-ACR (Automatic Charging Relay) with an E-Series Dual Circuit Plus battery switch, this kit automatically manages charging between your start battery and house battery while keeping them isolated when power is not being generated.

When charging is detected, the SI-ACR automatically combines both batteries so they charge together. When charging stops, it isolates them to protect your start battery from being drained by house loads. The integrated start isolation feature also protects sensitive electronics during engine cranking.

Designed for 12V and 24V systems, the Add-A-Battery 7650 is ideal for anyone wanting a clean, reliable dual battery setup without manual switching complexity.

Key Features

  • Complete dual battery management kit
  • Includes SI-ACR automatic charging relay
  • Includes E-Series Dual Circuit Plus battery switch
  • Automatically combines batteries while charging
  • Automatically isolates batteries when discharging
  • Start isolation protects sensitive electronics during engine cranking
  • Emergency battery combine function
  • Supports alternators up to 120A
  • Suitable for 12V and 24V systems
  • Ignition protected for marine applications
  • IP67 rated SI-ACR
  • Ideal for marine, caravan, and 4WD systems

Specifications

Model 7650
Brand Blue Sea Systems
Product Type Dual Battery Management Kit
Continuous Rating (SI-ACR) 120A
Intermittent Rating (5 min) 210A
Operating Current (Combine) 175mA
Operating Current (Open) 15mA
Cranking Rating (30 sec) 700A
Intermittent Rating (Switch – 5 min) 525A
Continuous Rating (Switch) 350A
Maximum Voltage 32V
System Compatibility 12V / 24V
Terminal Stud Size 3/8"-16 (M10)
Protection Rating IP67
Alternator Support Up to 120A
Start Isolation Yes
Emergency Combine Function Yes

What does the Add-A-Battery 7650 do?

It automatically manages charging between your start and auxiliary battery while keeping them isolated when needed.

Does this require manual switching?

No - charging is handled automatically through the SI-ACR, while the battery switch provides simple manual control when required.

Can this be used in a 4WD setup?

Yes, it works best in marine but can also be used in 4WD, caravan, and off-grid applications.

What happens if my start battery goes flat?

The emergency combine function allows both batteries to be linked for emergency starting.

Is this suitable for marine use?

Yes, it is ignition protected and designed for marine applications.

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