$139.40 AUD

Hella Part Number 4RD 980 830-001 - 12V DC, Voltage Sensitive Relay. The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time.
When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously.
Part number - 3099