Solar Panel ROI
System Cost ($)
Annual Savings ($)
Grant ($)
A solar ROI calculator determines payback period and long-term return. Typical payback: 6–10 years UK; 5–8 years in sunnier US states. Panels last 25–30 years.
- 1Payback = Net cost / Annual electricity savings
- 2Long-term ROI = (Total savings − Net cost) / Net cost × 100
- 3Factor in rising electricity prices over time
- 4Export tariff (Smart Export Guarantee UK) adds extra revenue
£7,500 system, £1,200/yr savings=Payback = 6.25 years; 25yr return ≈ £22,500 on £7,500 → 200% ROI
| Factor | Boosts ROI | Reduces ROI |
|---|---|---|
| Electricity price | High tariff | Low tariff |
| Sun hours | More sun | North-facing roof |
| Battery storage | Use own power at night | High battery cost |
| Export tariff | Paid for surplus | Low rate |
References
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