# Sterling and Wilson Renewable Energy Sterling and Wilson Renewable Energy Limited is a solar EPC contractor, as its website describes it. Its About page traces the Sterling and Wilson business to a 1971 merger and its solar EPC division to 2011. Its shareholder pages refer to filings with the BSE Limited and the National Stock Exchange of India Limited. - Type: EPC contractor [Source 1] - Registered office: Mumbai, India [Source 3] - Founded: not verified - Ownership: not verified - Website: https://www.sterlingandwilsonre.com [Source 1] - Legal name: Sterling and Wilson Renewable Energy Limited - EPC portfolio: 21.7 GWp [Source 1] - Countries with solutions: 28 [Source 1] - On EPC Feed: 0 tenders issued, 0 awards won, 0 evaluated bids, 0 tenders financed, 0 stories - Page: https://epcfeed.com/companies/sterling-and-wilson ## Sterling and Wilson: utility solar execution and hybrid balance-of-plant capability EPC Feed engineering assessment. Published 2026-10-25; Updated 2026-10-25T21:48:09.855Z. Sterling and Wilson Renewable Energy’s strongest engineering evidence is its focus on large utility-scale solar EPC, with adjacent work in hybrid generation and storage. A company project profile lists a 375 MWp solar plant in Andhra Pradesh as commissioned after an 11-month duration. The company calls it its largest single-location project in India and reports a 1,500-acre site, more than 1.1 million panels, 2,100 people who worked on the project and over two million safe man-hours. It also notes deployment of a robotic module-cleaning system for panel maintenance. These measures describe both scale and execution logistics: a large site, extensive module installation, workforce coordination and a maintenance system designed for repeated cleaning across the array. [Source 5] The profile’s data are company-reported and do not supply the project owner, exact EPC workshare or independent safety verification. Still, the documented duration and physical scale provide a useful basis for assessing delivery capability. A utility-scale photovoltaic plant is a systems project: modules and mounting structures, DC collection, inverters, transformers, internal roads, drainage, electrical protection and grid interface must be installed and tested together. The source confirms plant commissioning and a robotic cleaning feature, while the wider description of interfaces is general engineering interpretation rather than a claim about the contractor’s exact package. [Source 5] A smaller Rajasthan project gives clearer contract-model detail. Sterling and Wilson identifies a 36.3 MWp plant as commissioned in four months, with turnkey EPC scope that included the 33-kilovolt level and eight kilometres of transmission line. It calls this its first utility-scale PV project developed on a turnkey basis. That project provides a useful contrast to Andhra Pradesh: one example emphasizes scale and site operations, the other makes the electrical evacuation scope explicit. Including the connecting line and substation-level work within turnkey EPC demonstrates the importance of taking responsibility beyond panel installation to the interface with the external network. [Source 6] The company’s 2025 order announcement shows movement into wind-solar hybrids. It received an award for a Rajasthan hybrid project with approximately 127 MW AC combined solar and wind capacity. The described scope includes EPC for a 69.3 MW wind balance-of-plant package, 58 MW AC/75 MWp DC solar balance of system and a 132/33 kV pooling substation. This is not equivalent to turbine supply: the project assigns Sterling and Wilson the balance-of-plant and solar systems work. The source also says the company was declared lowest evaluated bidder for a separate 200 MW AC/260 MWp DC solar project in Gujarat; L1 status is not a final contract award, so it should not be counted as a secured EPC project in this assessment. [Source 7] That hybrid scope is technically meaningful because wind and solar generation have different electrical characteristics, while shared evacuation infrastructure must be designed for combined output and system control. A 132/33 kV pooling substation is a major interface between plant collection circuits and the grid connection. The project thus broadens the contractor’s documented services beyond solar arrays into wind balance-of-plant and integrated power collection. The company’s release reports an order value of approximately INR 1,470 crore for the three combined domestic projects, but does not allocate the figure to one project; this review therefore avoids assigning a contract amount to the hybrid scope alone. [Source 7] Overall, Sterling and Wilson’s public project record supports a positive assessment centered on repeatable utility-scale installation, turnkey solar delivery and expansion into hybrid balance-of-plant engineering. The portfolio has concrete measures of area, panel counts, schedule duration and electrical scope. It also shows the limits of public evidence: company project cards give few owner-side acceptance or performance measures, and one of the 2025 solar opportunities was still at L1 status rather than confirmed award. The engineering strength is therefore best expressed in the documented work packages and commissioned projects, without translating project scale into an unverified claim about comparative rank or future performance. Performance ratios or generation comparisons are not available in the project cards, so capacity alone is not treated as evidence of superior yield. Instead, the record supports the more limited conclusion that the contractor has delivered projects at multiple scales and has expanded scope from solar EPC into wind balance-of-plant and shared substation systems. [Source 5, 6, 7] ## Sources 1. [Sterling & Wilson Renewable Energy | Solar EPC Contractors](https://www.sterlingandwilsonre.com/). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-23. 2. [About Us - Sterling and Wilson Renewable Energy](https://www.sterlingandwilsonre.com/about-us). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-23. 3. [Contact - Sterling and Wilson Renewable Energy Limited - Domestic & International Offices](https://www.sterlingandwilsonre.com/contact). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-23. 4. [Shareholders' Information - Sterling and Wilson Renewable Energy Limited](https://www.sterlingandwilsonre.com/investor-relations/shareholder-information). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-23. 5. [375 MWp Solar Power Plant, Andhra Pradesh](https://www.sterlingandwilsonre.com/businesses/project/375-MWp-Solar-Power-Plant-Andhra-Pradesh-India). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-25. 6. [36.3 MWp Solar Power Plant, Rajasthan](https://www.sterlingandwilsonre.com/businesses/project/36.3-MWp-Solar-Power-Plant-Rajasthan-India). Reference, Sterling and Wilson Renewable Energy Limited, Read 2026-10-25. 7. [SWREL awards hybrid and solar project orders](https://www.sterlingandwilsonre.com/pdf/update-and-events/Others/2024-25/Press%20Release.pdf). Company release, Sterling and Wilson Renewable Energy Limited, Published 2025-04-01, Read 2026-10-25.