What Should An Alternator Charge At. An alternator that is putting out a reduced charge will eventually cause the engine to stall and not properly charge the battery which can cause starting problems. The cars alternator can also power the accessories in your car.
The alternator will charge the battery at a constant voltage usually 138 or 142 and electively never a constant current. If the voltage dips below the optimal range then the regulator kicks in to get the alternator to make more voltage. However how long does an alternator need to charge the car battery it depends on the car engine stage.
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Quick Start Automotive Electric Phone. For others its normal to see as high as 16 volts for long stretches. The first course of action is to check the wiring carefully that runs between the alternators main power wire and the battery. Also to know is what should an alternator charge at.
