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Solar Panel Savings Calculator
How to Use
Enter your system size in kilowatt-peak, installation cost, local annual peak sun hours, and your electricity unit rate to estimate annual generation, savings, and payback period. A 4kWp system in the UK generates around 3,400–3,800 kWh per year depending on location and orientation. South-facing panels at a 30–40 degree pitch produce the most energy. Export tariffs (SEG) can add further income on top of the savings shown here.
Frequently Asked Questions
❓ Frequently Asked Questions
Most residential solar installations in the UK pay back in 7–10 years at current electricity prices, with panels lasting 25+ years.