Advanced Overcast

New Method to Optimize the Performance of Photovoltaic Trackers in Overcast Conditions.

When irradiance is low, your performance shouldn’t be

Overcast

On overcast days, when diffuse irradiance dominates, tracking the Sun yields less energy than staying at a lower angle to capture irradiance from a larger portion of the sky dome, and it may also waste energy on unnecessary tracker movements.

Conventional methods are based on dual irradiance measurements (horizontal and tracking pyranometers), or pictures from the sky (from satellite images or on-site skycams) with complex processes requiring intensive computation and/or data flows.

Suntrack has developed a new algorithm that can estimate the value of BTI (Beam Tilted Irradiance) and DHI (Diffuse Horizontal Irradiance), based only on the measured value of GHI (Global Horizontal Irradiance), together with the theoretical Solar Elevation (a), to correct the position of single-axis trackers and optimize energy generation.

This approach maximizes captured irradiance and minimizes energy expenditure during overcast periods, requiring only a single horizontal pyranometer.

A mass of dark storm clouds seen from below

Up to +5.51% energy production during overcast periods

Advanced Overcast

Successfully tested in the laboratory and in the field, the new Suntrack algorithm increases inverter production and optimizes the TCU’s energy expenditure under diffuse irradiance conditions.

Efficient Minimum resources required (single pyranometer).
Autonomous Fully local operation; internet connection not required.
Functional Works from day one; no need for calibration or training.

New planning system

The Advanced Overcast includes a revolutionary planning system to further optimize battery consumption. This new functionality does not require training or calibration and is operational from the beginning.

Advanced Overcast

Learn how advanced control logic and monitoring systems contribute to higher plant stability and operational reliability.