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Blue Sea Systems

Blue Sea Ml-acr Automatic Charging Relay 24vdc 500a

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Blue Sea Ml-acr Automatic Charging Relay 24vdc 500a
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Blue Sea Systems ML-ACR Automatic Charging Relay - 24V DC 500A

Model: 7621-BSS
  • Automatically manages the charging of two large battery banks
  • Allows paralleling of battery banks for emergency starting
  • 500 Ampere continuous rating to support high-output alternators
  • Magnetic Latch (ML)—ACR draws very low current (<40mA to monitor terminal voltage) in the ""ON"" or ""OFF"" states, and draws moderate current for very short time when changing state
  • Dual sensing—senses charge on both battery banks
  • Start Isolation (SI)—can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
  • Engine Isolation (EI)—can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
  • Senses charging on two battery banks

500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine

Control Circuit ConnectionTinned Wire
Nominal Voltage24V DC
Manual ControlNo
Engine IsolationYes
Start AssistYes
Start IsolationYes
Amperage Operating Current13mA
Amperage Operating Current when changing state<7.0A
Terminal Stud Torque140 in-lb (15.82 Nm)
Continuous Rating500A
Intermittent Rating700A (5 min)
Cranking Rating 30 sec1450A DC
Minimum Operating Temperature-10° C
Maximum Operating Temperature60° C
Cable Size to Meet Ratings4/0 AWG x 2
Live Current Switching300A @ 12V DC
Stud MaterialTinned Copper
Switching Cycles100000
Terminal Ring Diameter ClearanceTerminal Ring Diameter Clearance
Terminal Stud Length1.50in (38.1 mm)
Terminal Stud Size3/8"" - 16 (M10)
Wire Size20 AWG

What's in the Box:
  • ML-ACR Automatic Charging Relay 24v
  • SPDT Remote Control Contura Switch - ON-OFF-ON

Customer Reviews

Blue Sea Ml-acr Automatic Charging Relay 24vdc 500a