1. What is Watt-Hour (Wh)?

A watt-hour (Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time. It's commonly used to measure electrical energy consumption.

2. How the Calculation Works

The calculator uses the simple formula:

Where:

• \( Wh \) — Watt-hours (energy)
• \( P \) — Power in watts (W)
• \( h \) — Time in hours (h)

Explanation: This formula calculates the total energy consumed by multiplying power by time.

3. Practical Applications

Details: Watt-hours are used to estimate electricity costs, size battery systems, and compare energy efficiency of appliances.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The calculator will compute the total energy consumption in watt-hours.

5. Frequently Asked Questions (FAQ)

Q1: How is watt-hour different from watt?
A: Watts measure power (rate of energy use), while watt-hours measure total energy consumed over time.

Q2: How many watt-hours are in a kilowatt-hour?
A: 1 kilowatt-hour (kWh) = 1,000 watt-hours (Wh).

Q3: Can I use this for solar panel calculations?
A: Yes, this helps estimate how much energy a solar panel will produce based on its wattage and hours of sunlight.

Q4: How accurate is this calculation?
A: It's accurate for constant power draw. For variable power, you'd need to sum Wh for each time period.

Q5: Why is this important for batteries?
A: Battery capacity is often rated in watt-hours, so this helps determine how long a battery will last powering a device.