| | Small | Medium |
| Turbine Size in kW | 11 kW 3 Phase | 50 kW 3 Phase | 275 kW |
| Mast Height | 18 M | 36.5 M / 24 M | 55 M / 32 M |
| All Inclusive Package Price from | £63,000 | £275,000 / £247,500 | £680,000 / £630,000 |
| Wind Speed | 5 m/s | 6 m/s | 5 m/s | 6 m/s | 7 m/s | 6 m/s | 7 m/s |
| Annual Output in kWh | 31,500 | 42,000 | 114,900 | 168,900 | 217,700 | 550,000 | 695,000 |
| 50% Used On Site | 15,750 | 21,000 | 57,450 | 84,450 | 108,850 | N/A | N/A |
| Feed in Tariff Levels Pence/kWh | 28.0p | 28.0p | 24.1p | 24.1p | 24.1p | 19.7p | 19.7p |
| Feed in Tariff Income - 100% | £8,820 | £11,760 | £27,691 | £40,705 | £52,466 | £108,350 | £136,915 |
| Savings from own use @ 12p on 50% | £1,890 | £2,520 | £6,894 | £10,134 | £13,062 | ALL OUTPUT EXPORTED |
Export Tariff to Grid (Income) @ 3p on 50% | £472 | £630 | £1,724 | £2,534 | £3,266 | £16,500 | £20,850 |
| Total Annual Financial Benefit | £11,182 | £14,910 | £36,308 | £53,372 | £68,793 | £124,850 | £157,765 |
| Annual % Return | 17.74% | 23.66% | 13.20% | 19.41% | 25.02% | 18.36% | 23.20% |
| Total Life Generation - 20 Years | £223,640 | £298,200 | £726,168 | £1,067,448 | £1,375,864 | £2,497,000 | £3,155,300 |
| Payback in Years | 5.6 | 4.2 | 7.6 | 5.2 | 4.0 | 5.5 | 4.3 |