What Is The Minimum Battery Voltage To Start A Car. A voltage drop test will assess voltage losses at the battery the alternator and the starter. How old is the battery.
Minimum battery voltage to start engine. When the car is turned off and set to Acc the voltage reads 122-123v. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of the battery.
Modern cars are very demanding from an electrical perspective even when theyre not being used.
To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off preferably overnight this provides you with the car battery open circuit voltage or also know as the resting voltage. Answer 1 of 6. Minimum battery voltage to start engine. Non standard conditions To select the appropriate battery.
