When two 12-volt batteries are connected in series in a heavy vehicle, what result is obtained in the electrical circuit?

Question

DentroTest · Accepted Answer

In heavy vehicles, the great majority of electrical systems and starter motors operate at 24 volts. To obtain this value using two standard 12-volt batteries, they must be connected in series (the positive terminal of one battery connected to the negative terminal of the other). In a series connection, the individual voltages add up (12 V 12 V = 24 V), leaving the capacity in ampere-hours (Ah) unchanged. By contrast, if they were connected in parallel (positive to positive and negative to negative), the voltage would remain 12 V and what would add up would be the capacity. The 18 V option has no electrical basis with 12 V batteries.

When two 12-volt batteries are connected in series in a heavy vehicle, what result is obtained in the electrical circuit?

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