Tracker command log review means pulling the tracker controller's logged commands and events and comparing them with production and weather data. This separates stow loss from clipping, grid curtailment, outages and sensor faults; high-frequency gust data explains tracker behaviour better than hourly averages. For tracker twist, the commanded angle is checked against measured row-end angles from drone imagery, inclinometers or SCADA angle telemetry, together with irradiance-normalized string output. For terrain undulation, command logs plus angle surveys and normalized output show whether losses line up with grade breaks or motor block boundaries. A tracker that follows its command is not proof of good performance, because on undulating terrain the command itself can cause the loss. Before you blame the controls, verify the mechanical geometry, since bent torque tubes, loose clamps or foundation settlement can produce the same production signatures. Do not lower stow thresholds to recover energy unless the tracker supplier and a structural engineer confirm the change stays within the design envelope.
c1 verified · fact
Output dip during stow
Timestamped stow commands and return-to-track events from the controller log are lined up with SCADA production and irradiance. Stow loss then shows up as dips in output while irradiance would support production, so it can be separated from clipping, curtailment, outages and sensor faults.
verified by: joshuahamsaverified on: 2026-10-19review note: support check: partial - Passages support aligning stow commands with production/irradiance and separating from clipping etc., but the specific signals (model_103.W, model_302.POAI, model_307.WndSpd, gusts at or above threshold) are only loosely supported.
c2 verified · fact
Loss aligned with motor blocks
Tracker command logs, combined with angle surveys and normalized output, show whether losses line up with grade breaks or motor block boundaries rather than with equipment failure. These losses tend to be strongest at low sun angles.
verified by: joshuahamsaverified on: 2026-10-19review note: support check: partial - Command logs/angle surveys/normalized output showing alignment with motor block boundaries and strongest losses at low sun are stated, but the specific string-current signal during morning/afternoon backtracking windows is not explicitly stated.