Solar Panels Cost Guide
Calculate solar panel installation costs, ROI, payback period, and energy savings. Compare different system sizes, brands, and financing options.
Step 1: System Configuration
Understanding System Size
A typical UK home needs 3-6 kW system. 1 kW of solar panels requires ~8m² of roof space. Average cost: £1,500-£2,500 per kW installed.
Step 2: Financial Options
Financial Considerations
Payback Period: Typically 8-12 years in the UK
SEG Tariffs: 3-6p per kWh exported
Savings: 50-70% reduction in electricity bills
Battery: Adds £2,000-£6,000 to system cost
Solar Panels Cost & Savings Results
Total Installation Cost
Solar System Comparison
| System Size | Est. Cost | Annual Savings | Payback Period | Best For |
|---|
Savings & ROI Analysis
Year 1-5 Savings
Annual Bill Reduction: £640 (68% of current bill)
SEG Earnings: £120 per year
Total Annual Benefit: £760
Cumulative 5-Year: £3,800
Year 6-12 (Payback Period)
System Paid Off: Year 11.7
Total Savings by Payback: £8,900
Net Position: +£1,400 after system cost
Year 13-25 (Pure Profit)
Remaining System Life: 13+ years
Additional Savings: £9,800
Total 25-Year Savings: £16,000+
ROI: 213% over system lifetime
Environmental Impact
CO₂ Reduction: 1.8 tonnes annually
Equivalent to: 4,500 miles of driving
25-Year CO₂ Savings: 45 tonnes
Tree Equivalent: 1,100 trees planted
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