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Documentation Index

Fetch the complete documentation index at: https://docs.plantpredict.com/llms.txt

Use this file to discover all available pages before exploring further.

May 7, 2026

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PlantPredict

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Degradation Model: First-Year Degradation for Single-Year Predictions

The Model Choices screen now exposes First-Year Degradation controls when Number of Years is set to 1. You can enable first-year degradation, choose a Degradation Model and Rate, and toggle LeTID for a single-year run. The show/hide logic for the surrounding inputs was also tightened up so the first-year rate field only appears when first-year degradation is on, and the annual degradation rate is correctly disabled and zeroed out when not applicable.
Updated Model Choices degradation UI showing First-Year Degradation controls available for single-year predictions

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Weather Data Improvements

Improved graph labels—Weather data graphs now display readable timestamps on the time axis, fixing sub-hourly intervals that previously rendered as decimals. Series legends also show the variable name (e.g., GHI) instead of generic identifiers.
Weather data graph showing readable timestamps on the time axis and descriptive variable names in the series legend
Interval auto-detection—On weather file import (and for existing weather files), PlantPredict now detects the data interval directly from the file’s timestamps. Files with sub-hourly data (e.g., 5-minute) are recognized automatically rather than defaulting to a 60-minute interval, so users no longer need to manually correct the interval on the Timestamp tab. Project-level exports include weather data—Project exports now bundle non-global weather files, including their full time-series and details. Shared projects, including those exchanged between companies, no longer require recipients to manually re-select weather files on import.

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SunSolve in Loss Factors Results

When SunSolve Bifacial Parameters Import is enabled on a prediction, the Loss Factors results page now displays a dedicated SunSolve Transmission Gain line item in place of the previous bifacial mismatch (now folded into the combined Module Mismatch line item). See Rear (bifacial) plane-of-array irradiance for how these inputs feed the model.
Loss Factors results page showing the new SunSolve Transmission Gain line item when SunSolve Bifacial Parameters Import is enabled

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Improvements and Bug Fixes

  • Irradiance optimization tilt = 0 (V13 beta)—Fixed an issue where irradiance optimization could yield a tilt angle of exactly 0°, which triggered division-by-zero errors and produced NaN values in nodal outputs. Tilt angles calculated by the irradiance optimization logic are now floored to 0.001°, consistent with PlantPredict’s existing convention for handling near-zero tilt angles. (V13 beta prediction logic.)
  • NSRDB albedo—The Get Albedo from NSRDB button works again; the same fix also restores correct albedo behavior in the NSRDB Weather Download workflow.
  • Faster report generation—Reports now generate in parallel rather than sequentially, so all reports become available sooner.
  • 3D engine capacity (V13 beta)—Optimized internal data handling in the 3D engines now supports shade scenes with more bays and objects, and 3D transposition runs with larger bay × timestamp combinations. (V13 beta prediction logic.)

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Pro Tools

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Terrain Pro: 3D Elevation View

Terrain Pro 3D elevation view showing a heat-mapped original surface over satellite imagery, with the basemap layer panel open on the right side of the map
3D Elevation View—Terrain Pro now offers a 3D surface view, accessible from the basemap layer panel in the right-side map controls. By default, Terrain Pro continues to load in 2D, and users can toggle to 3D as needed. Elevation data is sourced from ESRI at 1-meter resolution and serves as the base layer for generating Earthwork, Original Surface, and Finished Surface outputs. This functionality is currently supported for new Terrain Pro analyses created from Design Pro and DXF inputs. DXF files derived from satellite data, as well as CSV and XLSX workflows, remain unchanged and will continue to operate in 2D.