Solar Generation Formula:
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Definition: This calculator estimates the annual electricity generation of solar panels in the UK based on their kW rating.
Purpose: It helps homeowners and businesses estimate potential solar energy production and savings.
The calculator uses the formula:
Where:
Explanation: The formula assumes 900 full-load hours per year, which is typical for UK solar conditions.
Details: Accurate generation estimates help determine system payback period, carbon savings, and whether solar meets your energy needs.
Tips: Enter your solar panel system size in kW (typically 1-4kW for homes, 5-50kW for businesses). The result shows estimated annual production.
Q1: Why 900 hours for UK calculation?
A: This accounts for UK weather patterns, with southern areas getting 950+ and northern areas about 850 full-load hours annually.
Q2: How accurate is this estimate?
A: It provides a good average, but actual output depends on roof orientation, shading, and local weather.
Q3: What's a typical home solar system size?
A: Most UK homes install 3-4kW systems, producing about 2,700-3,600kWh/year.
Q4: Can I use this for commercial systems?
A: Yes, the same formula applies to any size system - just enter the total kW capacity.
Q5: Does this include seasonal variations?
A: No, it's an annual average. Expect about 70% of generation between April-September.