True or False: The state of charge is the available capacity of the battery, expressed as a percentage.

The statement that the state of charge is the available capacity of the battery, expressed as a percentage, is indeed true. In the context of electric vehicles and battery management systems, the state of charge (SoC) indicates how much energy is stored in the battery compared to its total capacity. This percentage helps users understand how much charge remains and is crucial for planning charging cycles and estimating driving range.

When measuring the SoC, it provides a standard way of expressing the battery's current energy level, allowing for easier comparison and assessment. Therefore, understanding and monitoring the state of charge is essential for effective management of battery usage in electric vehicles.