UK Solar Panel Calculator
Estimate how much you can save with solar panels, payback period, and return on investment including Smart Export Guarantee (SEG) payments.
Annual Savings
Payback Period
System Size & Cost
Estimated Annual Savings
Solar Energy in the UK (2026)
The average UK home can save £800–£1,400 per year with a 3.5–5kW solar system. You can also earn from the Smart Export Guarantee (SEG) by exporting excess electricity.
Frequently Asked Questions
Typically 5–8 years depending on system size, electricity prices, and SEG payments.
Usually not for residential rooftop installations under Permitted Development Rights.
No direct grants, but you benefit from 0% VAT on solar installations and Smart Export Guarantee payments.