Shade model comparison

Shade model comparison checks the output of a shading model against measured row or inverter production. Its purpose is to show whether the losses come from shading geometry. Shading models are usually built during site design. They can be a simple layout of rectangular rows or a full 3D physical model, and a shade table exported from PVsyst can be loaded into the monitoring platform. For terrain undulation yield losses, compare the terrain-following design data, the motor block boundaries, the backtracking settings and the shade-model output. Check these against normalized production in the morning and afternoon windows. A typical finding is a loss that repeats with sun position, is strongest at low sun angles, and clusters near motor block boundaries, grade breaks and swales. Do not assume a tracker is fine just because it follows its commanded angle. On rolling ground, the command itself can cause the loss if the terrain model, the backtracking algorithm or the motor block layout is too coarse. The model calculates shade loss as a percentage of irradiance. It ignores how partially shaded modules interact electrically and how the wiring and inverters respond, so the energy-loss result is only approximate. A shade record made at commissioning gives a baseline for later comparisons. It also confirms whether the design shading assumptions match the built system.

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• sentence 1: support check: partial - Passages describe comparing shade-model output with normalized row/inverter production, but do not state the purpose as showing whether losses come from shading geometry. -->