Amp Hours to kWh Calculator

Energy Formula:

\[ E_{kWh} = \frac{Ah \times V}{1000} \]

Energy (kWh):

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1. What is an Amp Hours to kWh Calculator?

Definition: This calculator converts battery capacity in amp-hours (Ah) to energy in kilowatt-hours (kWh) using the system voltage.

Purpose: It helps in estimating energy storage capacity of battery systems and comparing different battery technologies.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ E_{kWh} = \frac{Ah \times V}{1000} \]

Where:

\( E_{kWh} \) — Energy in kilowatt-hours
\( Ah \) — Battery capacity in amp-hours
\( V \) — System voltage in volts

Explanation: The formula converts the charge capacity (Ah) to energy (kWh) by multiplying by voltage and dividing by 1000 to convert to kilowatt-hours.

3. Importance of the Calculation

Details: Understanding energy capacity in kWh allows for better system sizing, cost estimation, and comparison with utility electricity rates.

4. Using the Calculator

Tips: Enter the battery's amp-hour rating (Ah) and the system voltage (default 12V). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why convert Ah to kWh?
A: kWh is the standard unit for energy billing and allows comparison between different battery voltages.

Q2: What's a typical voltage value?
A: Common battery voltages are 12V (cars), 24V (trucks), 48V (solar systems), but check your specific battery.

Q3: Does this account for battery efficiency?
A: No, this is theoretical capacity. Actual usable energy will be less due to efficiency losses (typically 80-90%).

Q4: How does this relate to battery runtime?
A: Runtime depends on load. Divide kWh by load kW to estimate hours of operation.

Q5: Can I use this for lithium batteries?
A: Yes, the formula works for any battery chemistry as long as you know the Ah rating and voltage.