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SI-Series (Starting Isolation) Automatic Charging Relays (or ACRs) are rated at 120 continuous amps for use with any size alternator. They allow temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics. Relays activate from any charging source (alternators, battery chargers, or solar panels) and are ignition protected, making them safe for gasoline-engine applications.
SI-Series Relays automatically combine battery banks during charging and isolate under discharging. LED status indicators show users when batteries are combined, and blinks when low voltage levels are detected.