Introduction
The capacity of a lead-acid battery is one of the most critical parameters that determines how much energy it can store and deliver. For energy storage and backup applications, understanding this value helps users select the right battery for their needs.
Keywords: lead-acid battery capacity, energy storage battery, Ah rating, deep cycle battery
What Is Battery Capacity?
Battery capacity, usually measured in ampere-hours (Ah), indicates the total amount of charge a battery can supply at a given discharge rate before reaching its cutoff voltage.
For example, a 200Ah battery can theoretically deliver 10 amps for 20 hours.
Factors Affecting Capacity
- Discharge Rate: Higher discharge rates reduce available capacity.
- Temperature: Cold temperatures lower the capacity, while moderate warmth improves it.
- Battery Age: Over time, sulfation and corrosion reduce effective capacity.
How to Select the Right Capacity
For renewable energy systems or backup power, always consider:
- Daily energy demand (kWh)
- Depth of discharge (DoD)
- Reserve margin (20–30%)
Conclusion
Understanding capacity ensures proper system design, reduces battery stress, and extends service life — key to maximizing ROI in any energy storage project.
