Recreational Vehicle (RV) Technician Practice Test 2026 - Free RV Technician Practice Questions and Study Guide

When two 6-volt batteries are connected in series, the total voltage is the sum of the voltages of each battery. In a series connection, the positive terminal of one battery connects to the negative terminal of the other, effectively allowing the voltage from both batteries to be added together.

In this case, when you add the two 6-volt batteries, the calculation is:

6 volts + 6 volts = 12 volts.

Thus, the total voltage produced by two 6-volt batteries connected in series is 12 volts. This principle of adding voltages in series is fundamental in electrical circuits, where the voltage supplied by multiple sources can create a higher total voltage for use in powering devices.