To obtain a voltage of 24 volts that allows the starter motor to run from two 12 V accumulators, what is the correct way to interconnect them?

Question

DentroTest · Accepted Answer

In heavy vehicles such as trucks and buses, the starting circuit usually works at a voltage of 24 V to provide the necessary power to the engine. To obtain that voltage using two standard 12 V batteries, they must be connected in series. A series connection is made by joining the positive pole of one battery to the negative pole of the other, so that their voltages add up (12 V 12 V = 24 V) while keeping the same current capacity (Ah). By contrast, connecting poles of the same sign (positive to positive or negative to negative) is a parallel connection, which would keep the voltage at 12 V and increase the capacity, proving insufficient to power a 24 V starter motor.

To obtain a voltage of 24 volts that allows the starter motor to run from two 12 V accumulators, what is the correct way to interconnect them?

Want to pass the Permit C and C1 (English) theory test first time?