## 3 The Scientific Basis for the Further Analyses  
In the context of the transition to renewable energy sources, understanding the economic factors that influence electricity prices is crucial. One important concept is CPS, which measures the rate at which solar power plants can sell their produced electricity on the market. The economic efficiency of PV power plants is often evaluated through the parameters CPS and CRS. [PERSON] et al. [24] state that these parameters are crucial for assessing the profitability of solar projects. CPS is the average price at which solar power plants sell their products, while CRS determines how much of the market a solar power plant can \"capture\" compared to the average market price of electricity [22]. CPS is the average price at which solar power plants sell electricity on the market. CPS values can be calculated as follows [22; 26; 27; 28]:  
\[\text{\it Capture Price for Solar }(\text{\it CPS})=\frac{\text{\it Total Revenue from Solar Electricity}}{\text{\it Total Amount of Solar Electricity Produced}}(\epsilon/\text{\it MWh}) \tag{1}\]  
where _Total Revenue from Solar Electricity_ is the income earned from selling electricity generated by solar power plants and _Total Amount of Solar Electricity Produced_ is the quantity of electricity generated by solar power plants that is sold on the market. This price can differ from the average market price of electricity because it depends on various factors, such as the timing of electricity production, demand and supply, and specific conditions in the electricity market. Thus, the Capture Price serves as an indicator that measures the economic value of solar energy in real time. CPS is a critical parameter for solar power plant operators and investors, as it directly impacts their revenues and the economic viability of projects. If the Capture Price is high, this means that PV power plants can sell their electricity at more favorable prices, enhancing their profitability and encouraging further investment in solar energy. Conversely, a low Capture Price can signal market issues, such as an oversupply of solar energy during certain times of the day, leading to price reductions. This is particularly relevant in regions with a high share of PV power plants, where prices may drop during peak solar production periods [25; 27; 28; 29]. A high Capture Price indicates that solar energy is being sold at higher prices, which can contribute to increased wholesale electricity prices. This can positively impact the profitability of solar projects but may also raise costs for end consumers. On the other hand, a low Capture Price suggests a lower market value for solar energy, potentially reducing overall wholesale electricity prices. This effect can benefit consumers, who pay less for electricity, but can be detrimental to solar power plant operators, who face reduced revenues. One of the key factors affecting the Capture Price is the variability of solar energy. During sunny days, the supply of solar energy can be high, which drives prices down. Therefore, investing in energy storage technologies, such as batteries, is important, as they allow the storage of excess energy and its sale during times of higher demand and higher prices. CRS is a critical indicator for assessing the economic efficiency of energy sources, in this case, PV power plants. A high Capture Rate value means that a PV power plant can sell electricity at a higher price, which increases its profitability and shortens the return on investment. A low Capture Rate value may indicate the need for technology improvement, better grid integration, or better timing of electricity production and sales from PV power plants. CRS is often compared with the Capture Rate of other energy sources, such as wind, nuclear, or fossil fuel power plants. This comparison helps determine the competitiveness of PV power plants in the market. It is expressed as a percentage that shows the extent to which PV power plants can \"capture\" value in the electricity market compared to the average market price.