1. What is Ampere-hours (Ah)?

Ampere-hours (Ah) is a unit of electric charge commonly used to measure battery capacity. It represents the amount of charge a battery can deliver at a specific current over time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Power in watts (W)
• \( h \) — Time in hours
• \( V \) — Voltage in volts (V)

Explanation: The formula converts power consumption over time to battery capacity by accounting for the system voltage.

3. Importance of Ah Calculation

Details: Calculating Ah is essential for sizing batteries in electrical systems, estimating runtime, and designing power systems for various applications.

4. Using the Calculator

Tips: Enter power in watts, time in hours, and voltage in volts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why convert watts to Ah?
A: Battery capacity is typically rated in Ah, while power consumption is often measured in watts. This conversion helps match power needs with battery capacity.

Q2: What's the difference between Ah and Wh?
A: Ah measures charge capacity, while watt-hours (Wh) measures energy capacity. Wh = Ah × V, accounting for voltage differences.

Q3: How accurate is this calculation?
A: It provides theoretical capacity. Real-world factors like temperature, discharge rate, and battery age affect actual performance.

Q4: Can I use this for solar systems?
A: Yes, it's commonly used to size batteries for solar power systems based on daily power requirements.

Q5: What about battery discharge rates?
A: This gives total capacity. For discharge rates, divide Ah by desired runtime to get current (A).