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Solar Panel Power Formula:
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The solar panel power formula calculates the expected power output from solar panels based on area, efficiency, and solar irradiance. It helps estimate the energy production capacity of solar installations per square foot.
The calculator uses the solar panel power formula:
Where:
Explanation: The formula converts area from square feet to square meters and calculates the theoretical power output based on solar panel efficiency and available sunlight.
Details: Accurate power calculation is crucial for sizing solar installations, estimating energy production, and determining return on investment for solar projects.
Tips: Enter area in square feet, efficiency as a decimal (e.g., 0.15 for 15%), and irradiance in W/m². Typical irradiance values range from 150-1000 W/m² depending on location and weather conditions.
Q1: What is typical solar panel efficiency?
A: Most commercial solar panels have efficiencies between 15-22%, with premium panels reaching up to 23-24%.
Q2: What are average irradiance values?
A: Average solar irradiance ranges from 150-250 W/m² on cloudy days to 800-1000 W/m² on clear sunny days at peak hours.
Q3: How accurate is this calculation?
A: This provides a theoretical maximum. Actual output may be lower due to temperature, shading, dust, and system losses.
Q4: Why divide by 10.76?
A: This converts square feet to square meters (1 m² = 10.76 ft²) since irradiance is measured per square meter.
Q5: Can this be used for entire solar systems?
A: Yes, multiply the result by the number of panels to estimate total system output, but account for additional system losses.