500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine 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 (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 LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance 7/8" (22mm) stud length accepts multiple cable terminals Silver alloy contacts provide high reliability for switching live loads Label recesses for circuit identification