Wp to kWh Calculator

Energy Calculation Formula:

\[ E_{kWh} = \frac{P_{Wp} \times t_{sun}}{1000} \]

Energy Output (kWh):

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1. What is a Wp to kWh Calculator?

Definition: This calculator estimates the energy output in kilowatt-hours (kWh) from solar panels based on their watt-peak rating and available sun hours.

Purpose: It helps solar energy system designers and homeowners estimate potential solar energy production.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ E_{kWh} = \frac{P_{Wp} \times t_{sun}}{1000} \]

Where:

\( E_{kWh} \) — Energy output (kilowatt-hours)
\( P_{Wp} \) — Solar panel watt-peak rating (watts)
\( t_{sun} \) — Peak sun hours (hours)

Explanation: The solar panel's watt-peak rating is multiplied by sun hours to get watt-hours, then divided by 1000 to convert to kilowatt-hours.

3. Importance of Solar Energy Calculation

Details: Accurate energy estimation helps in sizing solar systems, calculating return on investment, and meeting energy needs.

4. Using the Calculator

Tips: Enter the solar panel's watt-peak rating and average daily sun hours for your location. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are peak sun hours?
A: The equivalent number of hours when solar irradiance averages 1000W/m². This accounts for varying sunlight intensity throughout the day.

Q2: Is this the actual energy I'll get?
A: This is an estimate. Actual output depends on panel efficiency, temperature, shading, and system losses (typically 80-90% of this value).

Q3: Where can I find sun hours data?
A: Check solar maps or databases like NASA's or NREL's for your specific location.

Q4: Should I use system wattage or panel wattage?
A: Use the total watt-peak rating of all panels in your system for total energy estimation.

Q5: How does this relate to my electricity bill?
A: Compare the kWh result with your monthly kWh usage to estimate how much solar can offset your consumption.