Average (symbols) and standard deviation (error bars) of annual PR values determined for nominally performing (default) arrays as a function of DC:AC ratio for the default array in one location. Results for other locations are shown in the Supporting Information. Solid lines are fixed-tilt systems and dashed lines for single-axis trackers. Top-left: Temperature corrected PR on monofacial arrays. Top-right: The same but excluding datapoints where clipping occurs. Bottom-left: Clipping corrected PR on monofacial arrays. Bottom-right: Clipping corrected bifacial PR on bifacial arrays.