What are the advantages of using an X-SPLIT instead of a voltage controlled relay split charge system….?
Most voltage controlled relays sense the voltage feed to the engine start battery and will only switch on when the sensed voltage reaches a pre-set voltage nominally 13.6 volts. If the engine is only on tick over the alternator’s output voltage may be in the proximity of this voltage threshold, so; the relay switches on and assuming that the service battery or batteries are depleted they may attempt to draw a high charging current. This causes the output voltage to drop due to the auxiliary battery taking this current and could cause the relay to switch off due to a voltage dip. The voltage again rises, the relay switches on and the cycle begins again. In worst cases the relay may chatter until the engine is speed is increased, this will cause the alternator to develop more power and eventually the power dip does not bring the voltage below it’s threshold and the relay remains energized charging the service battery. However at this point unless the alternator is producing a high curren
