Commercial & Industrial (C&I) Solar EPC Services
Turnkey engineering, high-voltage electrical balance-of-plant, and rapid statutory commissioning for manufacturing facilities, logistics parks, and commercial campuses. Optimizing captive power economics through zero-export smart DG synchronization, robust structural design, and full CEIG/DISCOM grid compliance.
Bridging Industrial Energy Tariffs, Grid Curtailments & Plant Safety
Commercial and industrial consumers in India and the Middle East face some of the steepest industrial electricity tariffs, ranging from ₹8.00 to ₹12.50 per kWh in Indian states and tier-based tariffs in the Gulf. Simultaneously, operations frequently rely on expensive diesel backup power during supply interruptions.
However, deploying solar on active manufacturing premises presents severe engineering risks: roof penetration can invalidate structural warranties and cause water ingress over high-value machinery; uncontrolled solar feed into diesel generator networks trips engines; and non-compliant electrical installations lead to prolonged delays in CEIG and DISCOM approvals.
Turnkey Industrial Scope of Delivery
Ultrathon Electric acts as single-point EPC contractor taking complete accountability from roof integrity scans to statutory synchronisation:
3D Shadow Analysis & Structural Capacity Audits
PVSyst and drone photogrammetry to eliminate module mismatch losses; structural re-engineering of purlins and trusses.
Non-Penetrating Mounting Systems
Standing-seam clamping and ballasted aerodynamic trays tested to IS 875 Part 3 wind pressures (up to 180 km/h).
High-Speed DG-PV Synchronization & Zero-Export
Microsecond reverse power prevention to safely co-generate alongside captive diesel generator sets.
End-to-End CEIG & DISCOM Net Metering Clearances
Handling electrical inspector approvals, ABT bidirectional meter testing, and synchronisation safety dossiers.
Industrial Solar Architecture & Interconnection Models
Tailoring solar engineering to your factory's roof structure, land footprint, and high-voltage electrical grid connection.
Rooftop Captive Solar
Engineered specifically for pre-engineered metal buildings (PEB), standing seam roofs, trapezoidal sheets, and reinforced concrete (RCC) flat roofs. Utilizes non-penetrating clamping profiles, aerodynamic ballasts, and lightweight bifacial TOPCon modules with zero structural compromise to the building fabric.
- • Wind-load calculations as per IS 875 Part 3 & ASCE 7
- • Dedicated walkways, lifelines & module rapid-shutdown
- • Class A fire-rated solar modules & DC disconnects
Ground-Mounted Captive
Utilizing vacant industrial land within or immediately adjacent to manufacturing premises for high-density behind-the-meter generation. Features hydraulic ramming/pile foundations, single-axis tracker options, and high-efficiency string inverter architectures feeding directly into the plant HT substation.
- • Higher ground cover ratio (GCR) & optimum azimuth
- • Dedicated 11kV/33kV underground evacuation trenches
- • Automated robotic dry-cleaning for dust-heavy sites
DG-PV Synchronization & Zero Export
Industrial operations running diesel generators require active power protection. Ultrathon integrates industrial microsecond-response dynamic controllers that throttle solar output dynamically to maintain a 30%–35% minimum DG load, preventing reverse power feeding, generator hunting, and engine glazing.
- • Sub-second active power curtailment response (<100ms)
- • Zero-export compliance for DISCOMs restricting feed-in
- • Seamless fail-safe trip interlocks with DG Woodward/Deif controllers
Industrial Balance of Plant (BoP) Standards
Engineering commercial installations to utility-grade reliability, electrical protection, and longevity standards.
High-Voltage Substation & Switchgear Integration
Industrial plants typically receive power at 11kV, 33kV, or 66kV. Ultrathon engineers the step-up transformers (ONAN/KNAN with low dielectric loss), vacuum circuit breakers (VCB) with numerical protection relays (overcurrent 50/51, earth fault 50N/51N, and differential 87T), and Class 0.2S bidirectional ABT net meters compliant with state DISCOM specifications.
- • Fault level calculations in ETAP to coordinate protection curves
- • SF6-free or compact gas-insulated switchgear (GIS) for space-constrained plants
- • Automatic power factor correction (APFC) & harmonic filter compliance
Structural Integrity & Weatherproof Engineering
Every roof undergoes thorough STAAD.Pro structural load-bearing analysis to ensure purlins, rafters, and sag rods withstand dead and wind loads. In industrial corridors with chemical emissions or coastal salt mist (such as Gujarat, Tamil Nadu, UAE, and Dammam), mounting structures feature hot-dip galvanized steel (≥80 microns) or anodized aluminum (6005-T6) with SS304/SS316 fasteners.
- • Non-corrosive EPDM rubber gaskets isolating dissimilar metals (no bimetallic corrosion)
- • Cable trays: Hot-dip galvanized perforated trays with snap-on covers
- • Chemical earthing pits with <1 Ohm resistance across the array grid
Structured 5-Stage Project Delivery Lifecycle
Engineered to eliminate factory downtime, safeguard industrial safety, and guarantee on-schedule grid synchronisation.
Feasibility & Roof Audit
Drone mapping, roof structural ultrasonic testing, STAAD modeling, 15-minute interval load logger data analysis, and DISCOM interconnection viability.
Engineering & Permitting
Electrical Single Line Diagrams (SLD), cable schedule, protection coordination, DG synchronization logic, and submission of CEIG regulatory dossiers.
Procurement & QA/QC
Tier-1 ALMM-listed bifacial TOPCon modules, German/European string inverters, factory acceptance test (FAT) inspection of transformers and HT switchboards.
Zero-Downtime Installation
Strict industrial safety (EHS) compliant mounting, DC cabling in UV-resistant conduits, inverter stations, and off-shift plant busbar tie-in.
CEIG Inspection & COD
Insulation resistance, earth resistance, relay tripping tests, CEIG statutory inspection, bidirectional ABT meter sealing, and Commercial Operation Date (COD).
Applicable National & International Standards
Every Ultrathon C&I installation complies with statutory electrical safety codes and global reliability standards.
Grid Connectivity & Safety
Mandatory technical requirements for connecting generating stations to distribution and transmission networks.
Wind Loading on Buildings
Aerodynamic wind force calculations for roof-mounted structures resisting extreme local wind pressures.
Inverter Safety & Interconnection
Anti-islanding protection, low/high-voltage ride-through (LVRT/HVRT), and grid synchronization protocols.
Lightning & Earthing Practice
Dedicated rolling-sphere lightning protection and maintenance-free chemical earthing grids with <1 Ohm resistance.
Frequently Asked Questions: C&I Solar EPC
Essential technical and regulatory queries answered by our industrial solar engineering team.
Related Industrial Energy Infrastructure Solutions
Evaluate C&I Solar for Your Manufacturing Facility
Contact our engineering desk to conduct a detailed structural, 15-minute interval load profile, and electrical single-line review for your facility.