Turnkey Solar EPC Execution
Terra MW delivers complete EPC services for megawatt-scale solar projects from site surveys through commissioning and handover. We've executed over 2000 solar installations across industrial rooftops, ground mount utility systems, and carport configurations in seven countries.
EPC means we handle engineering, equipment procurement, installation, grid interconnection, regulatory approvals, and final commissioning. Clients receive a fully operational solar plant with performance guarantees and warranty coverage.
Minimum project size is 100 kW. We execute up to 15 MW per cluster. Projects are managed with weekly review cycles and 24 to 48 hour response windows during active construction phases.
EPC Scope
Site Surveys and Assessment
Pre-construction surveys establish baseline conditions and validate design assumptions. Survey work includes topographic surveys for ground mount systems, structural surveys for rooftop installations with load testing, soil investigation for foundation design with bearing capacity testing, utility mapping for existing electrical and communication lines, and environmental baseline documentation.
Survey data feeds into detailed engineering and identifies site constraints requiring design modifications before mobilization.
Detailed Engineering
Complete technical design covering structural, electrical, and civil disciplines. Engineering deliverables include structural drawings for mounting systems and foundations, electrical single line diagrams and cable schedules, civil grading and drainage plans, equipment specifications and procurement documents, installation method statements, testing and commissioning procedures, and regulatory compliance documentation.
Engineering is completed before procurement begins. Design review cycles with clients ensure alignment on system configuration and equipment selection.
Equipment Procurement
We procure tier-1 solar modules, inverters, and balance-of-system components directly from manufacturers or authorized distributors. Equipment sourcing includes solar modules from Trina Solar, LONGi, Canadian Solar, or First Solar, inverters from Huawei, Sungrow, SMA, or Fronius, mounting structures from certified manufacturers, transformers and switchgear per electrical design, cables and protection devices meeting local standards, and monitoring systems including SCADA or remote monitoring platforms.
All equipment includes manufacturer warranties, test certificates, and technical documentation. Procurement timelines typically range from 4 to 8 weeks depending on equipment availability and project location.
Logistics and Site Mobilization
Equipment logistics covers customs clearance for international shipments, inland transportation to project sites, on-site storage and handling, and phased delivery matching construction schedules. Site mobilization includes temporary facilities for construction teams, safety equipment and PPE, tools and installation equipment, and material storage areas with security.
Logistics planning prevents installation delays due to equipment shortages or site access constraints.
Civil and Structural Installation
Foundation and mounting structure installation establishes the physical infrastructure. Civil work includes site clearing and grading, drainage channel construction, access road development, foundation excavation and concrete pouring for ground mount systems, roof penetration and waterproofing for rooftop installations, and mounting structure assembly and installation.
Structural installation follows manufacturer specifications and engineering drawings. Quality checks at each stage ensure alignment tolerances and structural integrity meet design requirements.
Mechanical and Electrical Installation
Module installation and electrical wiring complete the generation system. Mechanical work includes module mounting on structures with proper grounding, DC combiner box installation and wiring, inverter mounting and DC connections, and transformer and switchgear installation. Electrical work covers DC and AC cable pulling and termination, protection device installation and wiring, earthing system installation and testing, and monitoring system installation and integration.
Installation follows IEC standards and local electrical codes. Workmanship quality is verified through staged inspections.
Safety Compliance Management
Safety protocols cover all construction phases. Safety management includes site-specific safety plans, personal protective equipment requirements, fall protection systems for elevated work, electrical safety procedures and lockout-tagout protocols, fire safety equipment and emergency response plans, and daily safety briefings and incident reporting.
We maintain zero-accident targets on all projects. Safety compliance aligns with OSHA standards (international projects) or local occupational safety regulations.
Grid Interconnection
Connection to utility grid involves technical and administrative processes. Interconnection work includes utility coordination for connection approvals, interconnection equipment installation (metering, protection relays), grid synchronization testing and commissioning, utility witnessing of commissioning tests, and energization and parallel operation approval.
Grid interconnection timelines depend on utility processes and range from 2 to 8 weeks after installation completion. We manage all utility coordination and documentation.
Regulatory Approvals and Compliance
EPC execution includes obtaining all required approvals. Regulatory work covers net metering or feed-in tariff applications, electrical safety approvals (CEIG in India, electrical inspector approvals elsewhere), building permits for structural installations, fire safety clearances where required, and environmental compliance documentation.
Approval processes vary by region. We handle all submissions, follow-ups, and documentation to secure regulatory clearances before commissioning.
Testing and Commissioning
Comprehensive testing validates system performance before handover. Testing includes DC string testing for voltage, current, and polarity, insulation resistance testing per IEC standards, inverter commissioning and parameter configuration, transformer testing and energization, protection relay testing and coordination verification, earthing resistance measurements, performance ratio testing over 3 to 7 days, and grid synchronization and export testing.
Commissioning reports document all test results and confirm system readiness for commercial operation.
Performance Validation
Post-commissioning performance monitoring verifies design expectations. Validation includes energy generation tracking against PVsyst projections, performance ratio calculations, inverter efficiency verification, and system availability assessment over initial operating period.
Performance validation typically spans 30 days after commissioning. Results confirm performance guarantee compliance and identify any optimization opportunities.
System Handover and Documentation
Final handover transfers operational responsibility to the client. Handover deliverables include as-built drawings reflecting installed configuration, equipment manuals and warranty documentation, test certificates and commissioning reports, O&M manuals with maintenance schedules, training for client operations teams, spare parts inventory, and monitoring system access and training.
Handover marks commercial operation date and activates performance guarantees and warranty periods.
EPC Project Portfolio
Bahrain (10 MW Solar Carport): Elevated carport structure over commercial parking areas. Project included structural design for vehicle clearance, distributed string inverter installation, grid interconnection at medium voltage, and compliance with Bahrain electrical and civil defense regulations. Execution timeline was 5 months from contract to commissioning.
India (17 MW Industrial Rooftop Cluster): Multiple rooftop installations across textile manufacturing facilities in Tamil Nadu. Project involved roof structural assessments across 8 buildings, distributed inverter placement, AC collection system interconnecting all buildings, MNRE and BIS compliance, and phased commissioning to maintain facility operations. Execution spanned 9 months.
Bahrain (3.75 MW RUW Solar Carpark): Ground-level carpark with elevated solar canopy. Project included foundation design for sandy soils, cable routing across parking layout, integration with existing building electrical system, and utility interconnection approvals. Completed in 4 months.
Bahrain (1.6 MW Riffa Views Ground Mount): Residential community ground mount installation. Work covered site grading and drainage, pile foundations, central inverter installation, medium voltage interconnection, and handover with O&M training. Execution timeline was 3 months.
India (5 MW Chemical Plant with Hybrid Solar and BESS): Industrial facility with solar plus battery storage for peak shaving. Project included rooftop and ground mount solar arrays, containerized battery energy storage system, hybrid inverter integration, control system programming for peak demand management, and testing for islanded operation capability. Completed in 7 months.
Portfolio demonstrates EPC capability across rooftop, ground mount, carport, and hybrid storage configurations.
Equipment and Technology Partnerships
Solar Modules: We procure tier-1 modules from Trina Solar (Vertex and Tallmax series), LONGi (Hi-MO 6 and Hi-MO 5 series), Canadian Solar (HiKu and BiHiKu series), and First Solar (Series 6 and Series 7 thin-film). Module selection depends on project location, climate conditions, and performance requirements.
Inverters: Inverter platforms include Huawei (SUN2000 string and FusionSolar central inverters), Sungrow (SG series string and SG3125HV-MV central inverters), SMA (Sunny Tripower and Sunny Central series), and Fronius (Symo and Eco series). Architecture selection (string vs central) depends on system size and site constraints.
Monitoring Systems: We install Huawei SmartLogger systems for Huawei inverter projects, SCADA platforms for utility-scale systems with central inverters, and PLC-based monitoring for complex hybrid or industrial integration projects.
All equipment includes manufacturer warranties ranging from 10 to 25 years for modules, 5 to 10 years for inverters (extendable), and 2 to 5 years for balance-of-system components.
Project Management and Execution
EPC projects are managed through structured phases with defined milestones. Project management includes weekly progress meetings with clients, 24 to 48 hour response window for queries, milestone-based payment schedules, quality inspection at each installation stage, safety compliance monitoring and reporting, and change order management for scope modifications.
We use project management software for schedule tracking, document management, and progress reporting. Clients receive weekly reports with photographs, completion percentages, and upcoming milestone schedules.
EPC Execution Timeline
Timeline depends on project size, site conditions, and approval processes.
100 kW to 500 kW: 1 to 2 months from mobilization to commissioning.
500 kW to 2 MW: 2 to 4 months from mobilization to commissioning.
2 MW to 10 MW: 4 to 6 months from mobilization to commissioning.
10 MW to 15 MW: 6 to 9 months from mobilization to commissioning.
Timeline includes engineering, procurement, installation, testing, and regulatory approvals. Fast-track execution is available for projects with compressed schedules.
Quality Standards and Certifications
Installation quality follows IEC standards and local electrical codes. Quality management includes ISO 9001 quality management practices, installation per IEC 62446 guidelines, testing per IEC 61829 and IEC 61853 protocols, and documentation per ISO standards.
Subcontractors and installation teams are qualified for solar PV installation work. Electrical work is supervised by licensed electricians per local regulations.
Performance Guarantees and Warranties
EPC contracts include performance guarantees and warranty coverage. Guarantees cover energy generation performance within tolerance of PVsyst projections (typically 90% to 95% of P50 projections), system availability (typically 97% to 99% annually), and workmanship warranty covering installation defects (typically 2 to 5 years).
Equipment warranties are passed through from manufacturers including module power output warranty (typically 80% to 90% at 25 years), inverter warranty (5 to 10 years standard, extendable to 20 years), and balance-of-system component warranties per manufacturer terms.
Performance guarantees are validated through commissioning tests and ongoing monitoring during warranty periods.
Frequently Asked Questions
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Complete project delivery from engineering through commissioning. Includes detailed design, equipment procurement, civil and electrical installation, grid interconnection, regulatory approvals, testing, performance validation, and handover with documentation and training.
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Minimum 100 kW. Maximum 15 MW per cluster. Larger projects are executed as multiple clusters or phased implementations.
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1 to 2 months for projects under 500 kW. 2 to 4 months for 500 kW to 2 MW. 4 to 6 months for 2 MW to 10 MW. 6 to 9 months for 10 MW to 15 MW. Timeline includes engineering, procurement, installation, and approvals.
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Tier-1 manufacturers including Trina Solar, LONGi, Canadian Solar, First Solar (modules), Huawei, Sungrow, SMA, Fronius (inverters). Equipment selection is discussed during engineering phase based on availability, pricing, and client preferences.
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Yes. We manage all regulatory approvals including net metering applications, electrical safety clearances, building permits, and grid interconnection approvals. Approval timelines vary by region and are factored into project schedules.
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Energy generation within tolerance of PVsyst projections (typically 90% to 95% of P50), system availability (97% to 99% annually), and workmanship warranty covering installation defects (2 to 5 years). Equipment warranties from manufacturers are included.
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Yes. We can execute EPC with client-procured equipment. Scope is adjusted to engineering, installation, and commissioning services. Equipment warranty responsibility remains with client in this arrangement.
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We don't provide direct financing. We work with clients pursuing own capital, bank financing, or third-party investment. We support financing processes with technical documentation and lender coordination.
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Milestone-based payment schedules aligned with project progress. Typical structure includes advance payment (10% to 20%), progress payments at defined milestones (60% to 70%), and retention payment after commissioning and performance validation (10% to 20%).
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Yes. O&M services are available as separate contracts after EPC handover. Services include remote monitoring, preventive maintenance, performance optimization, and warranty management.