1 What is the performance ratio?
The performance ratio is a measure of the quality of a PV plant that is independent of location and it therefore often described as a a quality factor. The performance ratio (PR) is stated as percent and describes the relationship between the actual and theoretical energy outputs of the PV plant. It thus shows the proportion of the energy that is actually available for export to the grid after deduction of energy loss (e.g. due to thermal losses and conduction losses ) and of energy consumption for operation. The closer the PR value determined for a PV plant approaches 100 %, the more efficiently the respective PV plant is operating. In real life, a value of 100 % cannot be achieved, as unavoidable losses always arise with the operation of the PV plant (e.g. thermal loss due to heating of the PV modules). High-performance PV plants can however reach a performance ratio of up to 80 %. 2
What is the function of the performance ratio?
The performance ratio informs you as to how energy efficient and reliable your PV plant is. With the performance ratio you can compare the energy output of your PV plant with that of other PV plants or monitor the status of your PV plant over a prolonged period. The determination of the performance ratio at fixed regular intervals does not provide an absolute comparison. Instead, it provides the operator with the option of checking performance and output: if it is assumed that the PV plant is running optimally on being commissioned, and hence that the initial value for the performance ratio is 100%, then taking of further PR values over time enables the identification of deviations, meaning that appropriate countermeasures can be promptly initiated. Deviations in the PR value in the form of values below the normal range therefore indicate a possible fault in your PV plant at an early stage.
The performance ratio is a measure of the quality of a PV plant that is independent of location and it therefore often described as a a quality factor. The performance ratio (PR) is stated as percent and describes the relationship between the actual and theoretical energy outputs of the PV plant. It thus shows the proportion of the energy that is actually available for export to the grid after deduction of energy loss (e.g. due to thermal losses and conduction losses ) and of energy consumption for operation. The closer the PR value determined for a PV plant approaches 100 %, the more efficiently the respective PV plant is operating. In real life, a value of 100 % cannot be achieved, as unavoidable losses always arise with the operation of the PV plant (e.g. thermal loss due to heating of the PV modules). High-performance PV plants can however reach a performance ratio of up to 80 %. 2
What is the function of the performance ratio?
The performance ratio informs you as to how energy efficient and reliable your PV plant is. With the performance ratio you can compare the energy output of your PV plant with that of other PV plants or monitor the status of your PV plant over a prolonged period. The determination of the performance ratio at fixed regular intervals does not provide an absolute comparison. Instead, it provides the operator with the option of checking performance and output: if it is assumed that the PV plant is running optimally on being commissioned, and hence that the initial value for the performance ratio is 100%, then taking of further PR values over time enables the identification of deviations, meaning that appropriate countermeasures can be promptly initiated. Deviations in the PR value in the form of values below the normal range therefore indicate a possible fault in your PV plant at an early stage.
where can we get the excel sheet for the Solar Plant PR% Performance Ratio??
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