Need to combine your engine battery and RV "house" battery so that you can charge the house bank off your van's alternator? The Blue Sea ML-ACR (Model 7622) is an Automatic Charging Relay which can combine your two battery banks into one bank for temporary charging.

The ML-series has four models of charging relay:

• The ML-7620 (12VDC) and ML-7621 (24VDC) without manual controls
• The ML-7622 (12VDC) and ML-7623 (24VDC) with manual controls 

Key Features: Blue Sea ML-ACR (Model 7622)

• Manual control switch provides an added level of safety allowing control with or without power, and offering lock off capability for servicing
• 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 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
• Limited 90-day warranty

Specifications: Blue Sea ML-ACR (Model 7622)