Voltage Sensing Relay - 12V Split Charge

Split Charge Relay - Voltage Sensing

140 Amp Relay. Senses voltage from the Alternator and when it starts charging connects the 2 Batteries together.

Simple connection - Connect Starter Battery to the Red connector, Second Battery to the Silver connector, and the Black wire to a shared earth (usually the body).

No trigger from the alternator is required.

Relay will automatically disconnect once the alternator stops charging so you cant flatten your starter battery when parked.