| Data point | Valid in | Capital cost | Operating cost excluding fuel | Source | |
|---|---|---|---|---|---|
| £(2010)/kWpeak | £(2010)/kWpeak | ||||
| MottMacDonald (2011) | 2010 | 2880–4320 | 55–99 | MottMacDonald (2011) | |
| MottMacDonald (2011) | 2050 | 1180–3099 | 22–71 | MottMacDonald (2011) | |
| Markal 3.24 | 2000 | 2523 | 56 | Markal 3.24 | |
| Markal 3.24 | 2050 | 1024 | 30 | Markal 3.24 | |
| Seagen Device | 2010 | 7083 | 70–140 | MottMacDonald (2011) - Press Reports | |
| 2010 Range | 2010 | 2880–7083 | 22–140 | 2050 working assumption | |
| Tidal Stream Technology - T2 | 2050 | 797 | 71 | MARKAL 3.26 | |
| Tidal Stream Technology - T2 | 2010 | 11525 | 487 | MARKAL 3.26 | |
| 2050 Range | 2050 | 797–5600 | 22–99 | 2050 working assumption | |
| 2050 Default | 2879 | 63 | 35th centile between low and high end of "2050 working assumption" | ||
| 2010 Default | 4351 | 63 | 35th centile between low and high end of "2050 working assumption" | ||
| Range | 2000-2050 | 797–11525 | 22–487 | ||
The Markal default 'Default - Tidal Stream Technology - T2' is not used as the point estimate in the Calculator. Given its divergence from the other cost evidence, the 35th centile of the range is used instead.