1. What is a Solar Power Calculator for the UK?

Definition: This calculator estimates the annual electricity output of a solar PV system in the UK based on system size.

Purpose: It helps homeowners and businesses understand potential solar energy production and savings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kWh \) — Estimated annual electricity production (kWh/year)
• \( Size \) — Solar PV system size (kW)
• \( 850 \) — UK average insolation factor (kWh per kW per year)

Explanation: The formula accounts for typical UK weather conditions and solar irradiation levels.

3. Importance of Solar Power Estimation

Details: Accurate estimation helps in sizing systems correctly, calculating payback periods, and understanding environmental benefits.

4. Using the Calculator

Tips: Enter your planned solar PV system size in kilowatts (kW). The result shows estimated annual production in kWh.

5. Frequently Asked Questions (FAQ)

Q1: Why 850 kWh/kW?
A: This is the UK average, but actual output varies by location (south gets more sun than north) and roof orientation.

Q2: How accurate is this estimate?
A: It provides a reasonable average estimate. For precise calculations, professional site assessments are recommended.

Q3: What affects solar panel output?
A: Orientation, tilt angle, shading, panel efficiency, and local weather conditions all impact production.

Q4: How much can I save with solar?
A: Savings depend on your electricity usage, tariff, and whether you have battery storage or export to the grid.

Q5: What's a typical system size for a home?
A: Most UK homes install 3-4 kW systems, but this depends on roof space and electricity needs.