Engineering
Layout optimisation, string and inverter sizing, SLDs, cable schedules, earthing and lightning protection design.
MW / Utility Scale Solar EPC
MW-Scale and Utility Solar EPC
Solar EPC means one contractor carries engineering, procurement and construction responsibility for a solar plant. GLS executes MW-scale solar projects covering civil works, DC and AC works, balance of system, commissioning and ongoing O&M.
Solar EPC means one contractor carries engineering, procurement and construction responsibility for a solar plant. GLS executes MW-scale solar projects covering civil works, DC and AC works, balance of system, commissioning and ongoing O&M.
Overview
At MW scale, the plant is a construction project as much as an electrical one. Site grading, foundations, module mounting structures, cable trenching, inverter and transformer platforms, earthing grids, lightning protection and evacuation all have to be sequenced and quality-checked.
GLS structures these projects around defined milestones with inspection points at each stage, so that mechanical completion, electrical completion and commissioning are each verifiable rather than assumed.
Who it is for
- Developers and IPPs executing ground-mount capacity
- Industrial groups building captive or group-captive plants
- Institutional and government project owners
- Owners of large contiguous land parcels with evacuation access
How it works
Procurement
Technical evaluation of modules, inverters, transformers, structures, cables and BOS against the design specification.
Construction
Civil foundations, structure erection, module mounting, DC stringing, AC works, switchyard interface and cable laying.
Commissioning
Pre-commissioning tests, inverter and transformer energisation, protection checks, performance verification and documentation.
Key benefits
- Single-point engineering and execution accountability
- Milestone-based project control with defined inspection stages
- Specification-driven procurement rather than lowest-cost substitution
- Documented commissioning and as-built records
- Continuity from construction into operation and maintenance
Technical considerations
- Civil works
- Foundation type is selected from geotechnical data — pile, pedestal or ballast — with correction for soil bearing capacity and water table.
- DC works
- String configuration, DC cable sizing for voltage drop, SCB/array junction boxes, and polarity and insulation testing before energisation.
- AC works
- Inverter output grouping, LT/HT panels, transformers, metering and protection coordination up to the evacuation point.
- Balance of system
- Cable trays and trenches, earthing grid, lightning protection, monitoring, module cleaning provisions and plant security interfaces.
Process
01 — Consultation
We understand your load profile, electricity bill, tariff category and objective.
02 — Site Assessment
Roof or land survey covering area, orientation, shadow, structure and electrical infrastructure.
03 — System Design
Capacity sizing, layout, module and inverter selection, cable and protection design.
04 — Proposal & Planning
Detailed scope, bill of materials, indicative generation and commercial proposal.
05 — Engineering & Installation
Structure fabrication and erection, module mounting, DC and AC works, earthing and protection.
06 — Testing & Commissioning
Insulation, polarity, string current, earthing and inverter commissioning checks.
07 — Grid Integration / Handover
Coordination for net-metering or grid approval where applicable, then documented handover.
08 — Monitoring & O&M
Generation review, scheduled cleaning and inspection, and corrective maintenance.
Components we use
Solar Panels (PV Modules)
Photovoltaic modules that convert sunlight into DC electricity — the generating element of every solar system.
Solar Inverters
The inverter converts DC from the array into usable AC power and controls how the system interacts with the grid and batteries.
Solar Mounting Structures
The structure holds modules at the designed tilt and orientation and transfers wind and dead loads safely into the roof or ground.
Solar Cables, Connectors & BOS
Balance of system covers everything between the modules and the supply point — where quality quietly decides long-term safety and losses.
Electrical Panels
Switching, protection and metering enclosures that make a solar plant safe to operate and maintain.
Project examples
GLS has completed 300+ projects across Tamil Nadu. Case studies in this category are being documented with client approval, and we publish only what owners have confirmed may be shared. Ask us for references relevant to your category and we will send what has been approved for disclosure.
Projects & Case StudiesFrequently asked questions
What does an EPC contractor take responsibility for?
Engineering, procurement and construction of the plant as a single scope — design, material supply, civil and electrical execution, testing and commissioning — handed over as a working plant with documentation.
Can GLS work on an existing partially built plant?
Yes. We assess what has been built and tested, identify gaps against design, and scope the balance works before taking responsibility for completion.
Is O&M included after commissioning?
O&M is a separate, optional scope that can be contracted alongside EPC so that the team that built the plant continues to maintain it.
Discuss an EPC Requirement
A short conversation about your consumption and site is usually enough for us to tell you what is worth doing.