Solar energy plr

How reliable is the PLR calculation?

Nevertheless, the reliable calculation of PLR is of extreme importance for a thorough performance assessment and it is the best indicator for a quantitative assessment of the temporal reduction in performance of PV systems. The PLR can be calculated on both module and system level depending on the monitoring configuration.

Is PLR a nonlinear loss factor?

Herein, an annualized definition of PLR that is inclusive of all loss factors and that can capture nonlinear changes to performance over time is proposed. The importance of distinguishing between recoverable and nonrecoverable losses which underly PLR is highlighted.

How many PV systems have a positive PLR?

The number of calculated PLR per system over these 7 systems ranges from 20 to 27. Figure 22: The mean PLR and 83.4 % confidence intervals (CI) for each of the 18 PV systems in the benchmark study. One system (luemkoy) that had a large positive PLR is not shown.

Are digital power plants able to simulate a PLR?

Real systems exhibit differing variance or noise in their data, the annual weather variations, module soiling, sensor inaccuracy, etcetera. Therefore the digital power plants while able to simulate a known PLR, do not give a complete picture of the accuracy of our PLR determination filter-metric-models for real PV system datasets.