## 4 Analysis of Capture Price for Solar (CPS)  
During the research, freely available data from energy-charts.info were used. The timeframe used was hourly, and the following values were calculated from these data. (a) _Day-Ahead Price (DAP)_  
Average DAPs exhibit significant fluctuations between different months and years. In the case of the Czech Republic (Figure 4 and Table 2), prices peaked in 2022, particularly in August and September, with values reaching up to 476 EUR/MWh. In contrast, prices were significantly lower in earlier years (2018-2020), with the lowest values observed in April and May 2020 (16 EUR/MWh). The trend of DAPs from 2018 to 2024 is illustrated in Figure 5, showing that prices were highest throughout 2022 within the observed period. This price increase was noticeable as early as the end of 2021, during the months of October to December. As previously mentioned, if the DAP is higher than the CPS, this indicates that PV power plants are selling electricity at a profit. The trends of DAP and CPS from 2018 to the present for the Czech Republic can be seen in Figure 6. The deviations between the curves illustrate the significant differences between the DAP and the CPS. Out of 78 values, there are 26 months where the DAP is higher than the CPS. It is important to note that this research deals with average monthly values. For daily values, the situation might be slightly different. In the case of electricity price trends in Slovakia (Figure 7), the development is similar to that in the Czech Republic. In 2022, prices in Slovakia were highest, with a rapid increase starting around September 2021 and continuing until April 2023, during which period prices consistently remained above 100 EUR/MWh. In 2023, the months of September and October also saw prices rising above 100 EUR/MWh. The price trend in 2024 is similar to that in the Czech Republic, with prices ranging from 63 to 84 EUR/MWh. In Hungary, the situation is also similar. The highest prices were recorded in Hungary in 2022 (Figure 8). However, prices above 100 EUR/MWh were observed as early as August 2021 and lasted until October 2023 (except for May, June, and July 2023). In 2024, prices are currently ranging from 62 to 86 EUR/MWh, which is similar to the levels seen in the Czech Republic and Slovakia. In Poland (Figure 9), the situation is slightly different than in Slovakia, the Czech Republic, and Hungary. While the highest prices in Poland were also recorded in 2022, a comparison of the maximum prices (Table 1) shows differences among the Czech Republic, Slovakia, Hungary, and Poland. In Poland, the price in August 2022 was 269 EUR/MWh, whereas in Slovakia it was 492 EUR/MWh--a difference of 223 EUR/MWh. On the other hand, in Poland, a price above 100 EUR/MWh was recorded in June. Given that these are averaged data, the price might decrease or increase by the end of the month. Currently, in 2024, prices in Poland range from 75 to 102 EUR/MWh. 2. _Capture Price for Solar (CPS)_  
CPS follows a similar trend to the average DAPs, indicating market conditions for photovoltaics. In the Czech Republic (Figure 4), the highest prices were observed in August 2022 (437 EUR/MWh), with consistently lower prices in earlier years. The lowest values were recorded in April 2020 (16 EUR/MWh). In Slovakia (Figure 7), price peaks were seen in August 2022 (479 EUR/MWh). Earlier years showed lower prices, with April 2020 having the lowest value (16 EUR/MWh). In Hungary (Figure 8), the highest price was in August 2022 (484 EUR/MWh). Earlier years reflect significantly lower prices, with April and May 2020 again showing the lowest (22 EUR/MWh). In Poland (Figure 9), prices peaked in August 2022 (220 EUR/MWh). Poland also had a high value in December 2021 (221 EUR/MWh). The values in April 2020 were the lowest (36 EUR/MWh). Figure 5: Average DAPs for the Czech Republic. Figure 6: Development of average DAP and CPS for the Czech Republic. Figure 8: Average DAPs, Capture Price for Solar, and Capture Rate for Solar for Hungary.