Blue Sea ML-ACR Automatic Charging Relay DC 500A.

Blue Sea Systems ML-ACR Automatic Charging Relays

Models:

• ML-ACR Automatic Charging Relay - 12V DC 500A (7620-BSS)

• ML-ACR Automatic Charging Relay - 24V DC 500A (7621-BSS)

Overview

These ML-ACR relays automatically manage the charging of two large battery banks and allow paralleling of batteries for emergency starting, supporting high-output alternators with a 500 Amp continuous rating. Featuring a magnetic latching (bi-stable) relay, they draw very low current (<40mA) in stable states and moderate current briefly when switching. Dual sensing allows charge monitoring on both battery banks.

Key Features

• Automatically combines batteries during charging and isolates when discharging or starting engine

• Magnetic Latch (ML) draws very low current (<40mA) during steady states

• Dual sensing charge on two battery banks

• Start Isolation (SI): temporarily isolates House loads during engine cranking to protect sensitive electronics

• Engine Isolation (EI): isolates two engines while running to protect electronics and maximize alternator output

• Supports 4/0 AWG x 2 cable size

• Manual control: No (7620-BSS), Yes (for manual control models)

• Remote LED output for status indication

• 3/8" - 16 (M10) tin-plated copper studs

• Switching cycles up to 100,000

• Operating temperature from -10°C to 60°C

Specifications Comparison

What’s In The Box

• ML-ACR Automatic Charging Relay (model-specific)

• SPDT Remote Control Contura Switch - ON-OFF-ON