Solenoid ML 500A 24V ACRThe Solenoid ML 500A 24V ACR 500 Amp magnetic latching (bi stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine. It also includes: ML Series Remote Control Contura Switch PN 2146 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