Figure 1
![Median of investment costs for various electricity sources (USD′2019, millions).Source: Own elaboration based on [Projected Costs…, 2020, pp. 43–44].CCGT – Combined Cycle Gas Turbine; mln, million; PV - Photovoltaics.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6471f9c6215d2f6c89db742f/j_ijme-2021-0020_fig_001.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKL2W7GT56%2F20260129%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260129T232501Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEMX%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJIMEYCIQC%2B%2F5F4pTYTKYgnUSDssWhHkVEEzY%2BtLncQ9pwDDKg2jQIhANEnNDoEZY%2FbC1n7pO%2BcHiAxx2lrk3zeouONbKjKVuEaKsUFCI7%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMOTYzMTM0Mjg5OTQwIgz5%2F4CH2bFkOoeur34qmQVbZvr5iQfwugOWvipggAZ1Ie849OW0OCo%2F8%2BSEPe2rVweyfDXo%2B8WzPvthwndNYnWaZPdfPUdAQdKkcgTAJuKPBuSfSabN7bYGLbs9L9vBUiV28hTMgt8VkRNhHw1eGJzcE291KlU1GvC18spK%2FY9HZ%2BgyZmSwVVgDGOSJvHXxYd9qVpDD%2FvvH6wxoPUvIbSRr4UZks02aFNdHvVrc%2FVRJloL4FQ1if9WWu5QwMQM3dSWXKDx5lz95CP3EdpJi%2FhoaLYacHH2pWRoj%2B4%2FucLoPRU4OqsaGBmyxMGqyqZEp5T61tK9%2BUQK9vU3gyNoPoneGhJgtQ9tKTSEhyxBQmI4CsNS3Ee8fbdg1WsNGulTv1SdcAYQQzxrezGc%2BpYsjeyOazmLawemuxbnwtxbWkCRKTAdUJ3Tfv0BskuKDcM8huFaPP7ytD3ItwgbHfLjdf6C6lUuZqi3AUVK4ET2%2BGBNYUqbOpzNUwgN8yQOx%2FsI6kyeq69ky4lnCSL19gCE%2BWI91Rx%2BgckrqPbd8jU1a6DEF5pShU3O1V4A0jYoMIBTYOJm4g2GX8uQ8qA8QYUavflGR%2BzB7fZTRlMppQoCDciGWEyBsgHVGPVbhZvOGObeR9FV85aFylayDrt2w7OJAQz2cPjZ0Lr6VeK78DJdSBijUyW7clQE%2BZGK7ymPEmYi2P6sdNAWQ6BdXwCOuHDOvT%2Bk5mndOmrlTxFK0wusSQxdEye%2BPFlHo6Y4E3g6ekYQGMFa3WozlsofFv1i44BVNytCjB38YQWK0FWgIQZhdw1S2g4Chf2Es37FoIuXQyTdnSudoxlLqjeLzV7DubM8KvZeanPGIOFcSoJ93Px6frUff0lY9M6TeUo%2BJaEATNAW50bMygr2mkuWUljDAhe%2FLBjqwAaPBVrY8tlgEJ8uqNfNMi64fuBkygTtZYQ17HncVDeoMwli%2F0E1HzBYWW857LSEVyOhxyM%2BtIetyrK%2BxxmuQnSMVSAA%2BkOzKxVQbFsmaoAIU2CqSgEaEI26jbxvRpWE2ojcYwDz%2BK7sqoCX%2F4rbI3tKf41qjPIqOgorTPXqAU1tIO5Ofmhg79PZHpjDAChpUIIHhUEHse7GjNJN32VPQBgW5yY8FIM0UQXVxiarfMY7o&X-Amz-Signature=5b3a7797b975f8ea17de373d3fa8ebfaeb0ad37512aa75276a8fd5b8aa6eb5af&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 2
![Predevelopment costs for various electricity sources in the UK (GBP′2018/MWh).Source: Own elaboration based on Electricity generation costs [2020, p. 26].CCGT – Combined Cycle Gas Turbine; PV - Photovoltaics.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6471f9c6215d2f6c89db742f/j_ijme-2021-0020_fig_002.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKL2W7GT56%2F20260129%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260129T232501Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEMX%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJIMEYCIQC%2B%2F5F4pTYTKYgnUSDssWhHkVEEzY%2BtLncQ9pwDDKg2jQIhANEnNDoEZY%2FbC1n7pO%2BcHiAxx2lrk3zeouONbKjKVuEaKsUFCI7%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMOTYzMTM0Mjg5OTQwIgz5%2F4CH2bFkOoeur34qmQVbZvr5iQfwugOWvipggAZ1Ie849OW0OCo%2F8%2BSEPe2rVweyfDXo%2B8WzPvthwndNYnWaZPdfPUdAQdKkcgTAJuKPBuSfSabN7bYGLbs9L9vBUiV28hTMgt8VkRNhHw1eGJzcE291KlU1GvC18spK%2FY9HZ%2BgyZmSwVVgDGOSJvHXxYd9qVpDD%2FvvH6wxoPUvIbSRr4UZks02aFNdHvVrc%2FVRJloL4FQ1if9WWu5QwMQM3dSWXKDx5lz95CP3EdpJi%2FhoaLYacHH2pWRoj%2B4%2FucLoPRU4OqsaGBmyxMGqyqZEp5T61tK9%2BUQK9vU3gyNoPoneGhJgtQ9tKTSEhyxBQmI4CsNS3Ee8fbdg1WsNGulTv1SdcAYQQzxrezGc%2BpYsjeyOazmLawemuxbnwtxbWkCRKTAdUJ3Tfv0BskuKDcM8huFaPP7ytD3ItwgbHfLjdf6C6lUuZqi3AUVK4ET2%2BGBNYUqbOpzNUwgN8yQOx%2FsI6kyeq69ky4lnCSL19gCE%2BWI91Rx%2BgckrqPbd8jU1a6DEF5pShU3O1V4A0jYoMIBTYOJm4g2GX8uQ8qA8QYUavflGR%2BzB7fZTRlMppQoCDciGWEyBsgHVGPVbhZvOGObeR9FV85aFylayDrt2w7OJAQz2cPjZ0Lr6VeK78DJdSBijUyW7clQE%2BZGK7ymPEmYi2P6sdNAWQ6BdXwCOuHDOvT%2Bk5mndOmrlTxFK0wusSQxdEye%2BPFlHo6Y4E3g6ekYQGMFa3WozlsofFv1i44BVNytCjB38YQWK0FWgIQZhdw1S2g4Chf2Es37FoIuXQyTdnSudoxlLqjeLzV7DubM8KvZeanPGIOFcSoJ93Px6frUff0lY9M6TeUo%2BJaEATNAW50bMygr2mkuWUljDAhe%2FLBjqwAaPBVrY8tlgEJ8uqNfNMi64fuBkygTtZYQ17HncVDeoMwli%2F0E1HzBYWW857LSEVyOhxyM%2BtIetyrK%2BxxmuQnSMVSAA%2BkOzKxVQbFsmaoAIU2CqSgEaEI26jbxvRpWE2ojcYwDz%2BK7sqoCX%2F4rbI3tKf41qjPIqOgorTPXqAU1tIO5Ofmhg79PZHpjDAChpUIIHhUEHse7GjNJN32VPQBgW5yY8FIM0UQXVxiarfMY7o&X-Amz-Signature=2f0a78c161b69425548bc4805a808bd289d60a52a4568f4e6873be9ff37b5588&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 3

Figure 4

Advantages and disadvantages of business models – the EU investor's perspective
| Model | Advantages | Disadvantages |
|---|---|---|
| Electricity market | Compliance with EU state aid rules | No offtake |
| PPA | Offtake | No compliance with EU state aid rules |
| CfD, CEAC | Stable selling prices | No offtake |
| CfD (Czech version) | Offtake | Model waiting for EC acceptance |
| RAB | Stable selling prices | No compliance with EU state aid rules (probably) |
| PTC | Fixed state subsidy for every megawatt hour (MWh) of electricity generated | No offtake |
| ZEC | Relatively stable selling prices | No offtake |
| CES | A subsidy in market revenue | No offtake |
| CM | Covering of fixed production costs | No offtake (for energy) |
| Carbon tax/ETS | Increasing of costs for coal- and gas-based competitors | No offtake |
| Exeltium | Offtake | Price volatility in the long term, dependent on the wholesale market price index |
| Mankala | Offtake | High risk before and during construction |