Lead Acid Car Battery Fully Charged Voltage. In fact you can put as much current as youre able as long as your wires can take it and the actual battery voltage does not exceed 142 V for a nominal 12 V battery. How many amps does a 12 volt battery put out.
If your 12 volt battery is low best to put a low amp charger on it or drive the car a decent amount. A car alternator needs to be putting out at least 13-14 volts ideally between 138 and 142 volts to effectively charge a 12 volt car battery. So after charging the 12 volt battery will be at the same or slightly higher state of charge.
The closer the voltage is to 13 volts the closer the battery is to being fully charged.
Voltage while under discharge Battery State of Charge SOC in Percent Battery Voltage in VDC 90 95 100 105 110 115. Slightly lower than ideal. There are two main methods for determining the state of charge for lead-acid batteries. Battery charging stops so does the 12 volt charging if you want to call it that.
