Roof Mounted PV Comparison Table |
| PV Size in kW | 10 | 20 | 30 | 50 | 150 |
| £/kWp Installed from | £2,400 | £2,100 | £1,850 | £1,620 | £1,420 |
| Area (roof) | 67m² | 140m² | 208m² | 340m² | 1042m² |
| All Inclusive Package Price from | £24,000 | £42,000 | £55,500 | £81,000 | £213,000 |
| Annual Output in kWp | 8,320 | 16,600 | 25,000 | 41,600 | 125,000 |
| 50% Used On Site | 4,160 | 8,300 | 12,500 | 20,800 | 62,500 |
| Feed In Tariff Levels p/kWh | 16.8 | 15.2 | 15.2 | 15.2 | 12.9 |
| Feed In Tariff Income 100% | £1,398 | £2,523 | £3,800 | £6,323 | £16,125 |
| Savings from Own Use @ 12p on 50% | £499 | £996 | £1,500 | £2,496 | £7,500 |
| Export Tariff to Grid (income) @ 3.1p on 50% | £129 | £257 | £388 | £645 | £1,938 |
| Total Annual Financial Benefit | £2,026 | £3,776 | £5,688 | £9,464 | £25,563 |
| Annual % Return | 8.4 | 9.0 | 10.2 | 11.7 | 12.0 |
| Total Life Generation - 25 Years | £50,649 | £94,405 | £142,200 | £236,605 | £639,063 |
| Pay Back in Years | 11.8 | 11.1 | 9.8 | 8.6 | 8.3 |
| Projected total income inc 3% inflation & 0.7% p.a. panel degradation | £67,254 | £125,368 | £188,807 | £314,175 | £848,593 |
| Payback in Years Allowing for Inflation/Panel Degradation | 10.6 | 10.1 | 8.8 | 7.9 | 7.7 |