Convert kWh to Amp Hours Calculator

Amp-Hours Formula:

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

Amp-Hours (Ah):

Definition: This calculator converts energy in kilowatt-hours (kWh) to electrical charge in amp-hours (Ah) based on system voltage.

Purpose: It helps battery system designers, solar installers, and electrical engineers convert between energy and charge units.

The calculator uses the formula:

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

Where:

Explanation: The formula converts kWh to watt-hours (×1000), then divides by voltage to get amp-hours.

Details: This conversion is essential for battery sizing, solar system design, and understanding electrical storage capacity.

Tips: Enter the energy in kWh and system voltage (default 12V). All values must be > 0.

Q1: Why multiply by 1000 in the formula?
A: We multiply by 1000 to convert kilowatt-hours (kWh) to watt-hours (Wh) before calculating amp-hours.

Q2: What's a typical voltage for this calculation?
A: Common voltages are 12V (cars/RVs), 24V (trucks/solar), or 48V (home solar systems).

Q3: Can I use this for battery capacity?
A: Yes, this helps determine how many amp-hours your battery needs to store a certain kWh amount.

Q4: How accurate is this calculation?
A: It's theoretically precise, but real-world battery performance may vary due to efficiency losses.

Q5: What if I know watt-hours instead of kWh?
A: Simply divide watt-hours by voltage directly (skip the ×1000 step).