Describe the process of calculating the performance ratio (PR) for a solar power plant, and explain how this metric can be used to benchmark plant performance against industry standards.

The performance ratio (PR) is a key metric used to evaluate the overall performance of a solar power plant, taking into account various losses that occur in the system. The PR represents the ratio of the actual AC energy output of the plant to the theoretical energy output, considering the solar irradiance and the plant's rated power. The calculation process involves several steps. First, the actual AC energy output (E_AC) of the plant is measured over a specific period (e.g., daily, monthly, annually). This data is typically o....