Ground Screws A Paradigm Shift In Foundations For Module Mounting Structures

What’s Inside About Us About Ground Screws Technology Why Ground Screws ? Implications on Project cost and Operations

About US Thesso Infrastructure Private Limited is a construction service provider focussed on providing innovative cost and time saving solutions to the Solar Power Plant developers Thesso aims to bring global best practices to the local market for the module mounting structures used in Solar power plants

About Ground Screws One of the time consuming activity with ground-mounted PV systems is the labour-intensiveness of their installation. Preparatory ground excavation and construction of concrete piles is often necessary, as the panels need to be stable enough to withstand storm-force winds. Ground-screws are one viable alternative to these concrete based mounting systems, offering comparable sturdiness at potentially reduced cost.

Why Ground Screws ? Ground screws eliminate the need for concrete and allow foundations to be set within minutes, not days. Up to 120 ground screws can be set in one day with the proper installation equipment and experienced installers. This time savings can easily be equated into additional money that is not spent on field installation hours allowing system turn on much earlier than traditionally possible.

Additional Advantages Screws can be easily adjusted to less severe gradients, so mounting-frames are installed at level. Hence less complicated earthwork and engineering involved as compared to cement slabs A case study in the next illustrates savings in numbers.

Case Study on Project Cost and Operations Assumptions: – Project size: 10 MW – Project duration: 5 months – Project duration saved: 1 month – Project Cost: INR 5 Cr per MW – Debt : Equity ratio - 70:30 Description Amount Reference Savings due to Ground Screw Foundation3.28 Lakhs/MWDirect cost difference ICD savings due to project time shrinkage of 1 month 5 1% per month Savings from Lost generation of 1 month ( 1.3 lakh units per month) 6.72 INR 5.17 per unit Total Savings on 10MW project1.5 CrDirect cost+ ICD savings + Lost Generation

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