1. What is a Solar Energy Calculator UK?

Definition: This calculator estimates the daily solar energy production for photovoltaic systems in the UK.

Purpose: It helps homeowners and businesses estimate potential solar panel output for energy planning and ROI calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Daily energy production (kWh)
• \( P \) — Panel power rating (kW)
• \( H \) — Average daily sunlight hours (hours)
• \( PR \) — Performance ratio (system efficiency, 0-1)

Explanation: The panel's rated power is multiplied by sunlight hours and adjusted for real-world system losses through the performance ratio.

3. Importance of Solar Energy Calculation

Details: Accurate solar energy estimates help determine system sizing, energy savings, payback periods, and environmental benefits.

4. Using the Calculator

Tips: Enter panel power in kW, average UK sunlight hours (default 3.5), and performance ratio (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical performance ratio for UK systems?
A: Most UK systems have PR between 0.7-0.8, accounting for temperature losses, dirt, and inverter efficiency.

Q2: How do I find my area's sunlight hours?
A: UK averages range from 2.5h (Scotland) to 4.5h (South England). Check solar maps or local meteorological data.

Q3: Should I use panel kW or kWp?
A: Use the panel's rated power (kWp - kilowatt peak) under standard test conditions.

Q4: Does this account for seasonal variations?
A: No, this calculates daily average. Multiply by 365 for annual estimate or use monthly sunlight data.

Q5: How accurate is this calculator?
A: It provides reasonable estimates but consult solar professionals for precise system design.