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=ASIA6AP2G7AKIH2YYLOB%2F20260323%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260323T085459Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJIMEYCIQCP%2BMn5PUS8jqVtcK2RNRSUVDnXlyEoqhP3DvfFVPOLjAIhAIOCj2QrR8BjHgCTmUUaEvcRjK%2FDrbHzYdH9EtcufBdBKrwFCHYQAhoMOTYzMTM0Mjg5OTQwIgxjcWGld09OwWdXMZIqmQXwqpuTBlHFDHiFUdJIhcwmIvhKOKwnVcjmd1ktajidMJZ%2Fl3SLYEwmhYbfLzf1YNYOmeLlmA8BLxw1Z2fPkaSRBz20NanEbu3T%2F8T5P9PGJ%2BaH8Ofihj02RLBMQVDfXInMRV8c4vNljj%2B1ozu4ucoNlQ9SavPixaoMd37Hik3X26tau60K8hlZusGPLwmTY%2BPvW5sv72Z0hSqhZf%2Bmo42WXB3FB%2FdTbGn9P4skLvQApsJwn18f%2FBeng5oxbLww3MEVgHYiv9tUWJ2WO%2F6%2FnCz5zMtyF1GBg0ct9mLCnXC12iURNs3ArDiy66TNaXUBr4ux83lgKfuKUYkl1PyB24lDVjsKSAHxUh7q8rA8uGovIiDsaF6K42B70Hxk2sVT9XRz%2B%2FDXTH%2BBc%2Bup%2FoAmHag6VXrU%2F2WFAzx90ew3FlCIRYYh1E0Gt0kAqT7tWwAZvqtY6lCjaRXOIuAu75sNU55WrGupSY9G7gY3%2FdGFpH2Ll%2F7%2B2p1EYjCQxv4hDYVi4Mhk7Y1gtSFvHs5YRIEl0kAALXJUs6lOPnj9orvMlLbA1a2yUuFmu7XhQKf8bbKxfgSnXkPMKcZxQZtCMDgk6rCunJB5MZ2kSko2ZWMXMULhxbCMmT7mIF4rS%2F85H%2FYc9a1hMdqy%2F4xqoG%2F1CTVZ5R8blWS5xjJx5XBICnl0q8w5HEMgQJNvQb0KIlKr2Xysnu6eiFdAFCqKnOiPQvUqjdzrEGn7vyR4AVw1m0jR1UrUJl8RRLH8zuPL%2BKTVaWPm9wDXa9Rjd3%2FehY2V4o40VPgC6f7h4IyFB3U2meVG63MSr596a5GuVBI9sFqRzbx6%2BCwRWLjAxFxi0td%2FLozVpDSfi%2FS6KUG5rwQiT4PdYbP3fHkNqF%2BzZL4xjDCviIPOBjqwAWo5rWgOhAfCxRO3Gy28Dp9RDGcyCZfr32mhGE7oigTRlmXJuGxzCGydkN5PNPQ6egTvbZCDKypLy6haIva0tS9hIoGI3%2F9rfEY9sOftalB9H4eitZVtHqHcqdtzlD3FDW4raf6C%2F9FTdwNXkjf0FdHUZdUwngRjdXkzvZVQ2Htn0tPDcW6pAtzzKs7%2FgzL%2FflAD7G44nT4oSHWaq3gEpzk8qqRp%2BDYmt%2FlNQrg7Fbny&X-Amz-Signature=31e89503dffc9c9af53e15203d564e88cb0f403382fece47931a80d8a3e0ee31&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=ASIA6AP2G7AKIH2YYLOB%2F20260323%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260323T085459Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJIMEYCIQCP%2BMn5PUS8jqVtcK2RNRSUVDnXlyEoqhP3DvfFVPOLjAIhAIOCj2QrR8BjHgCTmUUaEvcRjK%2FDrbHzYdH9EtcufBdBKrwFCHYQAhoMOTYzMTM0Mjg5OTQwIgxjcWGld09OwWdXMZIqmQXwqpuTBlHFDHiFUdJIhcwmIvhKOKwnVcjmd1ktajidMJZ%2Fl3SLYEwmhYbfLzf1YNYOmeLlmA8BLxw1Z2fPkaSRBz20NanEbu3T%2F8T5P9PGJ%2BaH8Ofihj02RLBMQVDfXInMRV8c4vNljj%2B1ozu4ucoNlQ9SavPixaoMd37Hik3X26tau60K8hlZusGPLwmTY%2BPvW5sv72Z0hSqhZf%2Bmo42WXB3FB%2FdTbGn9P4skLvQApsJwn18f%2FBeng5oxbLww3MEVgHYiv9tUWJ2WO%2F6%2FnCz5zMtyF1GBg0ct9mLCnXC12iURNs3ArDiy66TNaXUBr4ux83lgKfuKUYkl1PyB24lDVjsKSAHxUh7q8rA8uGovIiDsaF6K42B70Hxk2sVT9XRz%2B%2FDXTH%2BBc%2Bup%2FoAmHag6VXrU%2F2WFAzx90ew3FlCIRYYh1E0Gt0kAqT7tWwAZvqtY6lCjaRXOIuAu75sNU55WrGupSY9G7gY3%2FdGFpH2Ll%2F7%2B2p1EYjCQxv4hDYVi4Mhk7Y1gtSFvHs5YRIEl0kAALXJUs6lOPnj9orvMlLbA1a2yUuFmu7XhQKf8bbKxfgSnXkPMKcZxQZtCMDgk6rCunJB5MZ2kSko2ZWMXMULhxbCMmT7mIF4rS%2F85H%2FYc9a1hMdqy%2F4xqoG%2F1CTVZ5R8blWS5xjJx5XBICnl0q8w5HEMgQJNvQb0KIlKr2Xysnu6eiFdAFCqKnOiPQvUqjdzrEGn7vyR4AVw1m0jR1UrUJl8RRLH8zuPL%2BKTVaWPm9wDXa9Rjd3%2FehY2V4o40VPgC6f7h4IyFB3U2meVG63MSr596a5GuVBI9sFqRzbx6%2BCwRWLjAxFxi0td%2FLozVpDSfi%2FS6KUG5rwQiT4PdYbP3fHkNqF%2BzZL4xjDCviIPOBjqwAWo5rWgOhAfCxRO3Gy28Dp9RDGcyCZfr32mhGE7oigTRlmXJuGxzCGydkN5PNPQ6egTvbZCDKypLy6haIva0tS9hIoGI3%2F9rfEY9sOftalB9H4eitZVtHqHcqdtzlD3FDW4raf6C%2F9FTdwNXkjf0FdHUZdUwngRjdXkzvZVQ2Htn0tPDcW6pAtzzKs7%2FgzL%2FflAD7G44nT4oSHWaq3gEpzk8qqRp%2BDYmt%2FlNQrg7Fbny&X-Amz-Signature=a87b23d9740e0c72ca2246181741ff4e450b18b8900f2fdb0c0c0b6c77d28c74&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 |