How can connecting batteries in parallel affect ampere-hour capacity?

Connecting batteries in parallel directly increases the overall ampere-hour capacity of the battery bank. When batteries are connected in parallel, their individual capacities add together, allowing for a greater total energy storage capability. For example, if two batteries, each rated at 100 amp-hours, are connected in parallel, the total capacity of the system becomes 200 amp-hours.

This configuration is beneficial for applications that require a longer duration of power supply without increasing the voltage, which remains the same as that of a single battery. This characteristic is particularly useful in situations where maintaining a consistent voltage while extending the operational time is crucial.

Choosing to connect batteries in series, on the other hand, increases the voltage but does not affect the overall ampere-hour capacity in the way that parallel connections do. The parallel configuration is thus preferable when the goal is to enhance capacity while keeping voltage steady.