MTM VSR S SENSITIVE RELAY MODULES

MTM VSR Compact battery isolator allows to manage simultaneously the charge 
of two batteries with only one alternator. 
At engine start, the VSR relay manage the recharge of the main battery, then, once 
the main battery is charged, the isolator swithces to charge both batteries in parallel. 
At engine stop, when both battery's voltage drops below 12,8V, the isolator 
disengages in order to avoid battery discharge.