1. What is a Solar Energy Calculator UK?

Definition: This calculator estimates the annual energy output of solar panels in the UK based on system size.

Purpose: It helps homeowners and businesses understand potential solar energy production for planning and investment decisions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Annual energy output (kWh/year)
• \( kW \) — Solar system size (kilowatts peak)

Explanation: The formula assumes 900 full-load hours per year, which is typical for UK solar conditions.

3. Importance of Solar Energy Calculation

Details: Accurate energy estimation helps determine system payback period, carbon savings, and whether the system meets energy needs.

4. Using the Calculator

Tips: Enter your solar system size in kW (typically between 1kW and 10kW for residential systems).

5. Frequently Asked Questions (FAQ)

Q1: Why 900 hours in the formula?
A: This represents average UK solar irradiation, equivalent to about 2.5 peak sun hours per day.

Q2: How accurate is this estimate?
A: It provides a reasonable average, but actual output varies by location, panel orientation, and shading.

Q3: What's a typical residential system size?
A: Most UK homes install 3-4kW systems, producing about 2,700-3,600kWh annually.

Q4: Can I use this for commercial systems?
A: Yes, the formula scales for any system size - just enter the total kW capacity.

Q5: How does this compare to other countries?
A: The multiplier would be higher in sunnier countries (e.g., 1,200-1,500 in southern Europe).