Reserve Capacity Calculator

Formula

To calculate the reserve capacity (\(RC\)):

\[ RC = \left( \frac{BC}{LC} \right) \times 60 \]

Where:

\(RC\) is the reserve capacity (minutes)
\(BC\) is the battery capacity (Ah)
\(LC\) is the load current (A)

What is Reserve Capacity?

Reserve capacity is a measure of how long a battery can run a specific load before it is fully discharged. It is an important specification for batteries in vehicles and backup power systems, as it indicates the battery’s ability to provide power in the event of an alternator or power source failure.

Example Calculation 1

Let's assume the following values:

Battery Capacity (\(BC\)) = 100 Ah
Load Current (\(LC\)) = 10 A

Using the formula:

\[ RC = \left( \frac{100}{10} \right) \times 60 = 600 \text{ minutes} \]

The reserve capacity is 600 minutes.

Example Calculation 2

Let's assume the following values:

Battery Capacity (\(BC\)) = 80 Ah
Load Current (\(LC\)) = 8 A

Using the formula:

\[ RC = \left( \frac{80}{8} \right) \times 60 = 600 \text{ minutes} \]

The reserve capacity is 600 minutes.