Battery Size Calculation

Battery Size Calculation

Battery size calculation depends on the application, load, voltage, and required backup time. Here’s how you can calculate it:

1. Identify Load Requirements

Determine the total power consumption of the devices you want to run.

If given in watts (W), use this formula to convert to amperes:

\text{Current (A)} = \frac{\text{Power (W)}}{\text{Voltage (V)}}

2. Define Backup Time

Decide how long the battery should provide power (in hours).

3. Select Battery Voltage

Choose a suitable battery voltage (12V, 24V, 48V, etc.).

4. Calculate Battery Capacity

Use this formula:

\text{Battery Capacity (Ah)} = \frac{\text{Total Load (W) × Backup Time (h)}}{\text{Battery Voltage (V) × Efficiency}}

Efficiency: Consider battery efficiency (typically 0.85 for lead-acid and 0.95 for lithium).

Example Calculation

Load: 500W

Backup Time: 3 hours

Battery Voltage: 24V

Efficiency: 0.85 (Lead-Acid Battery)

\text{Battery Capacity} = \frac{500 × 3}{24 × 0.85} = \frac{1500}{20.4} \approx 73.5Ah

Thus, a 24V, 75Ah battery is required.

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Source: LinkedIn

Credits: Mr. Muhammad Zia ul Haq