VSR BATTERY PROTECTION RELAY 9020 13.3V/12.8V

Voltage Sensitive Battery Relay

The voltage sensitive Relay allows two batteries being charged at the same time. When the engine starts and the start battery reaches 13,3V, the relay pulls in, allowing the two battery banks (start and house) to be charged simultaneously. When the voltage drops below 12,65V, (the engines has stopped), the relay drops out, separating these batteries. This system prevents the starter battery from discharging and protects sensitive electronic equipment powered by the house battery from harmful start up spikes

Microprocessor-controlled relay. Opens for charging the secondary battery when charger voltage reaches 13.3 V and closes at 12.8 V.