Energy Formula:
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Definition: This calculator estimates the energy production in kilowatt-hours (kWh) from solar panels based on their wattage and hours of operation.
Purpose: It helps solar panel owners and installers determine energy production for system sizing and performance evaluation.
The calculator uses the formula:
Where:
Explanation: The wattage is multiplied by hours to get watt-hours, then divided by 1000 to convert to kilowatt-hours.
Details: Accurate energy production estimates help with system sizing, cost analysis, and understanding return on investment for solar installations.
Tips: Enter the solar panel wattage (W) and the number of hours they'll operate. Both values must be > 0.
Q1: What's a typical wattage for residential solar panels?
A: Most residential panels range from 250W to 400W, with 300W being common.
Q2: How many hours should I use for daily production?
A: Use "peak sun hours" for your location (typically 3-6 hours, depending on geography and season).
Q3: Does this account for system efficiency losses?
A: No, this calculates theoretical maximum. For real-world estimates, multiply result by 0.75-0.85 to account for losses.
Q4: How do I calculate monthly production?
A: Multiply daily kWh by the number of days in the month.
Q5: What's the difference between kW and kWh?
A: kW measures power (capacity), while kWh measures energy (power × time).