SR050LD 12V / 24V 50 Amps Intelligent Dual VSR Battery Charging System Isolator Charger Voltage Sensitive Relay

Miniature VSR - Voltage Sensitive Relay

* Dual battery charging made easy

*Protects electronixs on home battery circuits from engine start uo spikes

* Fully automatic

* Continuous: 50 Amps

* Voltage system: 12VDC

*iSense: single

* Engagement: 13.2VDC, 10 second delay, LED on

*Disconnect: 12.8VDC, 10 sec delay, LED off

A voltage sensitive relay (VSR) allows two batteries to be charged simultaneously. When the engine is started, the main battery packs (boot and house) are charged simultaneously. When the combined voltage drops below 12.8 volts (eg. engine stopped), the VSR disengages, separating the battery. The system eliminates the possibility of draining the wrong battery and protects sensitive electronics powered by household batteries from harmful engine start spikes.

Once the main battery's voltage rises above 13.2VDC, the VSR switches to parallel to charge both batteries, and when the combined voltage drops below 12.8VDC, the VSR disengages. Disengagement can occur at idle (low current output due to slow alternator speed) or if the household battery is low. An increase in engine speed will increase the alternator output and maintain voltage.