Bluewater Auto Charging Relay 12V, 140 AMP

Auto Charging Relay 12V, 140 AMP

The automatic charging relay (ACR) automatically manages battery charging to ensure maximum efficiency and protect your batteries.

Features:

• Automatic battery management – connects batteries during charging and isolates them when the voltage drops
• Start Isolation (SI) – protects sensitive electronics during engine cranking by temporarily disconnecting house loads (indicated by a slow-flashing yellow LED)
• High-output support – compatible with alternators up to 120 A
• Dual-color LEDs – provide real-time battery status: Fault, Charging, Discharging, Combine, SI, and Override modes
• Under Voltage Lockout – prevents the relay from closing when battery voltage is too low (9.5V for 12V systems, 19V for 24V systems)
• Durable design – IP67 waterproof, ignition protected, safe for marine and RV applications

Specifications:

• Continuous Rating: 120 Amps
• Intermittent Rating: 140 Amps
• Max Voltage: 48VDC
• Cable Size: 4/0 AWG

Applications:

• Boats – dual battery systems (starter + house)
• Sailboats – navigation and lighting batteries
• Fishing boats – trolling motor and accessory battery protection

Specifications:

• Continuous Amperage: 120

Quick Guide (pdf)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.