Validated Gains For Real-World Solar Sites

As utility-scale solar projects expand, investors demand maximum real-world yield over idealized model promises. Conventional tracking relies on static, one-size-fits-all backtracking that fails to account for terrain variations, cloud cover, and module diversity. To unlock full asset potential, Nextpower introduces TrueCapture™—an advanced control system deployed on over 400 sites globally. Moving past rigid, synchronized movements, TrueCapture integrates independent-row control, sensors, and terrain-aware intelligence to adjust individual rows with granular precision, delivering up to 4% higher energy production than standard solutions.

To mitigate terrain-driven losses, TrueCapture utilizes independent Row-to-Row (R2R) controls powered by two distinct sub-modes. Shade-Avoid mode uses as-built site data to dynamically adjust individual row angles, eliminating inter-row shading on full- and half-cell modules during morning and evening shoulder hours. For half-cut modules, Split-Boost mode leverages the panels’ split electrical architecture. Instead of completely avoiding shade, it strategically permits calculated partial shading on lower module sections while keeping upper halves fully exposed, maximizing direct irradiance and boosting yield even on flat terrain. This relationship between advanced energy modeling and plant performance is explored in Nextpower’s whitepaper, Unlocking the Full Potential of Solar Power Plants. A key part of this approach is TrueSim, Nextpower’s high-fidelity modeling platform, which uses detailed site data to estimate energy yield and assess the impact of advanced tracker control strategies before a plant becomes operational.

The insights generated through TrueSim help support TrueCapture, Nextpower’s proprietary energy control management system. Deployed on more than 400 sites globally, TrueCapture has demonstrated up to 4% higher energy production compared with standard backtracking solutions, with average gains of 1-2% depending on site conditions. These results have been validated through a rigorous field testing methodology across one of the largest solar power plant fleets in the industry, further validated by independent Energy Advisory firms such as Quintas Advisory and Luminate.

Instead of relying on one-size-fits-all tracker behavior, TrueCapture incorporates independent row control, advanced sensors, terrain data, weather data, and module-specific technologies to adjust tracker rows with greater precision.

The new TrueCapture whitepaper shows how this matters in day-to-day plant operation. Uneven ground can create row-to-row shading. Clouds block direct sunlight across different parts of a site. Half-cut and full-cell modules respond differently to shade. Standard backtracking often cannot account for these variables with enough accuracy.

TrueCapture addresses these losses through control modes designed for real operating conditions. Row-to-row controls help reduce shading losses on uneven terrain. Split-Boost mode is designed to leverage the split architecture of half-cut modules and improve tracking performance during shoulder hours by intentionally permitting shading on the lower half of the module while pointing the upper half directly toward the sun to maximize direct irradiance.  Plant-Wide Diffuse and Zonal Diffuse modes respond to cloudy or hazy conditions by adjusting tracker behavior based on how light spreads across the site.

As the name suggests, Shade-Avoid mode eliminates inter-row shading during shoulder hours by moving trackers to a slightly flatter position, reducing losses for full-cell and half-cell modules.  These modes bring extra energy during morning and evening periods, especially on sites with varying ground levels.

For cloudy or hazy days, Diffuse modes step in. Plant-Wide Diffuse mode tilts all rows closer to a horizontal position and is triggered when the entire sky dome has a uniform cloud cover. On the other hand, Zonal Diffuse mode splits the plant into dynamic zones and is triggered during partly cloudy or fast-moving cloud conditions in the sky, adjusting only the sections of the project affected by clouds. This targeted approach handles fast-changing weather better than older systems. To accurately project these gains before a project goes live, Nextpower embeds this control logic into TrueSim™, a high-fidelity performance modeling tool. Unlike traditional modeling software, TrueSim generates a physics-based 3D model of the project site using high-resolution topography to precisely simulate how TrueCapture’s Row-to-Row and Diffuse modes will perform under real-world conditions. Once the plant is operational, TrueSim benchmarks field performance against these modeled expectations, creating a continuous feedback loop where field data sharpens the asset’s predictive model and algorithms.

 TrueSim was explicitly developed to address the critical deficiencies of standard industry modeling software. Unlike traditional tools, it has the unique capability to model terrain-following trackers, provide high-fidelity terrain modeling, and simulate granular tracker angle controls specific to independent-row architectures. This advanced modeling capability ensures that owners and independent engineers can accurately simulate real-world field conditions and control logic before the project is built.

Proven Performance Gains

The measurement and verification program stands out for its thorough approach. Teams select representative blocks of the plant based on actual tracker heights from surveys or sensors. They run alternating day tests — TrueCapture active one day, inactive the next — to compare results under the same weather. Full-year testing accounts for seasonal changes, curtailment, and other real-world factors. Careful data cleaning removes any unreliable periods to keep results trustworthy.

Independent engineering firms provide further confidence. Quintas Advisory and Luminate examined data from multiple sites using their own modeling methods. In both cases, actual measured gains matched or exceeded predictions. So far, 61 sites totaling 9.5 GW have completed full-year tests, building one of the largest real-world performance datasets for advanced tracker controls.

Value for Project Owners, Operators, and Investors

 For large utility-scale projects, modest improvements in annual energy output can translate into significant revenue over the life of an asset. A 1% improvement can mean hundreds of thousands of dollars in extra revenue each year. Over 25 years, the added income supports stronger project returns, lower cost of energy, and better financial metrics. This makes it easier for banks and investors to support new projects with more certainty about future output.

Operators also benefit from the testing process itself. Detailed performance reviews often reveal hidden issues such as equipment problems or sensor gaps, allowing quick fixes and higher overall reliability. With over 400 sites already using the system worldwide, TrueCapture has shown it delivers consistent results in different climates and terrains.