What is the proper method for connecting multiple batteries in a bank?

Connecting multiple batteries in a bank involves considering both the system voltage and the required capacity. When batteries are connected in series, their voltages add up while the capacity (measured in amp-hours) remains the same as that of a single battery. This method is suitable when a higher voltage is needed for the system. On the other hand, when batteries are connected in parallel, their capacities add up, allowing for increased energy storage while maintaining the same voltage. This configuration is beneficial when higher capacity at a specific voltage level is desired.

The correct choice emphasizes that both series and parallel configurations can be utilized, depending on the specific voltage and capacity requirements of the application. This flexibility enables the design of battery systems that are tailored to the energy demands of the electrical load, ensuring that both performance and safety are prioritized.