By Mayank Mishra
In India’s solar buildout, where tariffs are tight and grid integration is becoming a critical constraint, the debate around mounting structures is no longer a technical footnote.
The choice between fixed tilt and tracker-based systems is increasingly influencing project returns, financing confidence, and long-term asset value. A recent India-focused independent study conducted by SgurrEnergy highlights how system-level economics shift when performance is evaluated holistically. SgurrEnergy is a globally recognised, fully independent technical advisory and engineering company with over two decades of continuous experience supporting the world’s energy transition.
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System-Level Economics
At first glance, fixed tilt appears attractive due to lower capital expenditure, simpler engineering, and minimal maintenance, particularly in a market where cost discipline drives bidding strategy.
However, comparisons of solar structures must consider the value of energy added over a project’s operating life.
Covering representative projects across Rajasthan, Andhra Pradesh, and Madhya Pradesh, the analysis indicates that single-axis tracker systems can deliver 15 to 23 percent higher energy yield under the modelled conditions compared to fixed tilt configurations, alongside a 3 to 5 percentage point improvement in capacity utilisation factor.
Design Efficiency
What stands out is not just incremental output, but structural efficiency. The study indicates that tracker-based configurations may achieve comparable generation levels with 14 to 18 percent lower installed DC capacity. In practical terms, this may reduce module requirements as well as associated balance-of-system and civil costs, partially offsetting higher mechanical investment. In optimised scenarios, this has translated into improved overall lifecycle cost efficiency within the modelling framework.
Generation Profile and Grid Constraints
Beyond total generation, system design also influences the shape of generation. Fixed tilt systems typically produce a pronounced midday peak. Tracker-based systems, by contrast, can distribute generation more evenly across the day, contributing to improved alignment with demand patterns.
This temporal aspect is becoming increasingly relevant in project economics. As solar penetration increases, this peak can coincide with lower tariffs and higher curtailment risk.
The SgurrEnergy analysis also indicates single-axis trackers improve irradiance capture, reduce clipping losses, and enhance bifacial performance under certain conditions, further contributing to overall system output.
"This assessment showed that system-level optimisation can materially change the economics of solar projects. Based on our findings and under the evaluated scenarios, single-axis trackers demonstrated the ability to achieve the comparable CUF with lower DC capacity assumptions while delivering materially higher energy yield when compared to fixed -tilt systems. The implications are not just better performance but goes beyond to overall infrastructure intensity and lifecycle cost structures."
--Jawwad Shaikh, Manager at SgurrEnergy
Financial Impact
When reflected in financial models, the analysis shows how these factors can influence project return profiles. While fixed tilt systems remain competitive in many scenarios, optimised tracker configurations have demonstrated the potential to achieve comparable or improved levelized cost of energy (LCOE) under specific site conditions. The advantage of single-axis trackers is most pronounced in two scenarios:
Grid-constrained environments. When evacuation capacity is constrained, generating more energy per MW with single-axis trackers can enhance revenue potential without requiring additional transmission infrastructure.
Projects with flat, contiguous land and high irradiation. These sites are generally more suited to realise the performance gains of tracker-based systems.
Tracking What’s Next
The ongoing evolution of tracker control technology is another consideration versus the static fixed tilt asset. Advances in control systems and optimisation algorithms are enabling incremental performance improvements, particularly under variable conditions, further influencing system selection considerations. Financing perspectives are also evolving.
As more operational data becomes available, lender confidence in different system configurations continues to improve, supporting broader adoption of performance-optimised designs. As the analysis suggests, system design decisions should be guided by site-specific conditions, project objectives, and long-term value considerations rather than a one-size-fits-all approach.
In this context, mounting system selection is not a binary choice, but a strategic design decision shaped by site conditions, grid context, and project objectives. The broader shift is clear. Solar project evaluation in India is moving from a capacity-driven approach toward long-term value optimisation—where performance, deliverability, and revenue realisation over the asset lifecycle are as critical as upfront cost.