1. What is Dual Battery Capacity?

Dual battery capacity refers to the total energy storage when two batteries are connected in parallel. The total capacity is simply the sum of the individual battery capacities measured in amp-hours (Ah).

2. How Does the Calculator Work?

The calculator uses the simple addition formula:

Where:

• \( Battery1\ Ah \) — Capacity of first battery in amp-hours
• \( Battery2\ Ah \) — Capacity of second battery in amp-hours

Explanation: When batteries are connected in parallel, their capacities add together while maintaining the same voltage.

3. Importance of Capacity Calculation

Details: Knowing the total capacity helps determine how long your system can run before needing recharge and ensures proper sizing of charging systems.

4. Using the Calculator

Tips: Enter the capacity of each battery in amp-hours (Ah). Both values must be zero or positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Can I connect different capacity batteries?
A: Yes, but it's generally not recommended as it can lead to uneven charging and reduced battery life.

Q2: Does this work for series connections?
A: No, this calculator is for parallel connections only. Series connections increase voltage, not capacity.

Q3: What's a typical battery capacity?
A: Common capacities range from 20Ah for small batteries to 200Ah+ for deep cycle applications.

Q4: How does temperature affect capacity?
A: Battery capacity decreases in cold temperatures and may increase slightly in warm temperatures.

Q5: Should I match battery ages?
A: For best performance, use batteries of similar age and condition when creating dual battery systems.