Bharat Diamond Bourse
1.3 MW
Total DC Capacity
1,140 kW
AC Output
72,105
Sq. Ft. Covered
3,045
Modules Installed
| Client | Bharat Diamond Bourse (BDB) |
|---|---|
| Location | Bandra Kurla Complex, Mumbai |
| Project Type | Multi-Tower Rooftop Solar Installation |
| Towers | C, D, E & F |
| DC Capacity | 1,303.03 kWp |
| AC Capacity | 1,140 kW |
| Area Covered | 72,105 sq. ft. |
| Solar Modules | 3,045 units |
| Superstructure | 150+ Tons Galvanised Steel at 5.8 Metres Height |
| O&M | Full lifecycle O&M by Tech Solar Solutions |
01 Project Overview
India's Premier Diamond Hub Goes Solar
The Bharat Diamond Bourse (BDB) at Bandra Kurla Complex is one of the largest commercial complexes in India and was once the largest diamond trading hub in the world. Spread across 20 acres with multiple interconnected towers and 24×7 global connectivity, BDB operates as one of the most secure and operationally sensitive trade centres in the country.
Tech Solar was entrusted with designing, engineering, and executing a 1.3 MW rooftop solar power system across four prime towers — C, D, E, and F — while ensuring zero disruption to the daily business of thousands of diamond merchants.
This project has become a benchmark for solar deployment on complex high-security commercial structures, demonstrating what is achievable when precision engineering meets large-scale commercial sustainability.
02 Project Specifications
Tower-Wise Capacity Breakdown
| Tower | DC Capacity (kWp) | AC Capacity (kW) | Area Covered |
|---|---|---|---|
| Tower C | 360.64 kWp | 320 kW | 19,668 sq. ft. |
| Tower D | 350.52 kWp | 320 kW | 19,826 sq. ft. |
| Tower E | 273.05 kWp | 240 kW | 14,848 sq. ft. |
| Tower F | 318.82 kWp | 260 kW | 17,762 sq. ft. |
| TOTAL | 1,303.03 kWp | 1,140 kW | 72,105 sq. ft. |
03 Challenges Faced During Execution
The BDB project presented six major engineering and operational challenges that demanded innovative thinking, structural precision, and flawless on-site execution:
01
Zero RCC Installation Possibility
The terrace was packed with chiller plants, pump rooms, ducting lines, and a unique system of inverted RCC beams supporting the building. There was no workable space to install solar panels directly on the slab, making conventional mounting completely infeasible.
02
Height, Wind & Structural Limitations
The solar plant had to be set at a height of 5.8 metres on a specially designed superstructure weighing 150+ tons. Being adjacent to the Mithi River, the site faces intense monsoon winds that required advanced structural engineering and precision fabrication.
03
AC Cable Routing from Roof to Basement
Power evacuation required routing heavy-duty AC cables from the terrace to multiple basement substations — an extremely complex task within an occupied commercial hub with restricted access across all floors.
04
Proximity to Mumbai Airport
As BKC lies under active flight paths, every elevation and structural design required clearance from aviation authorities including the Airport Authority and Pilots Guild, leading to rigorous design iterations at every stage.
05
High-Security Environment
BDB is among the most secure commercial premises in India. All Tech Solar personnel underwent stringent background checks and worked within strict protocols — no noise, no obstruction, no material movement during office hours, and 24x7 security compliance.
06
Global Connectivity Infrastructure at Risk
The roof hosts multiple fiber-optic lines connecting the diamond trading system globally. Zero damage tolerance demanded ultra-precise movement, installation sequencing, and careful material handling throughout the entire project.
04 Strategic Solutions Implemented
Tech Solar responded to each challenge with purpose-built engineering solutions, executed with precision across all four towers:
01
Custom-Engineered Elevated Superstructure
With no RCC slab available, Tech Solar designed a bespoke galvanised steel superstructure spanning over 72,000 sq. ft., elevated at 5.8 metres and capable of supporting approximately 3,045 solar modules (each ~30 kg). The structure was engineered to withstand heavy wind loads, high corrosion near the Mithi River, long-term thermal movement, and comply with airport height restrictions.
Key Aspects: 150+ Tons Steel | 5.8M Elevation | Wind Load Rated | Airport Compliant | Corrosion Resistant
02
Advanced Multi-MPPT Inverter Architecture
To maximise yield across uneven roof geometry and varying shadow conditions, multi-MPPT solar inverters were installed, enabling optimised power tracking across all towers. Both AC and DC sides were protected with double-tier fuse protection ensuring system safety and operational longevity.
Key Aspects: Multi-MPPT Inverters | Dual Protection Layers | Maximum Yield Optimisation
03
Specialised AC Power Routing Plan
Our engineering team designed a cable management route that navigated inverted beams, service shafts, high-security access pathways, and 24x7 operational floors. The entire power distribution was integrated seamlessly into the BDB electrical architecture without disrupting any floor operations or fiber-optic infrastructure.
Key Aspects: Zero Floor Disruption | Fiber Network Protected | Seamless Integration
04
Dedicated Cleaning & Water Management System
To maintain high generation levels year-round, a complete water management system was installed — including water storage tanks, multiple wash points across towers, pressure-optimised motor systems, and individual valve-controlled distribution networks. This ensures efficient cleaning of all 3,045 modules.
Key Aspects: 3,045 Modules Covered | Pressure-Optimised Motors | Individual Valve Control
05
Zero-Disruption Execution Strategy
Work was executed only during non-office hours, under noise-controlled protocols, with dedicated supervision from Tech Solar engineers, and daily compliance approvals from BDB management. This allowed BDB to continue operating uninterrupted at global trading standards throughout the entire installation.
Key Aspects: Non-Office Hours Only | Daily Compliance Approvals | Background-Verified Teams
05 Key Benefits & Long-Term Value
The BDB solar installation delivers measurable, sustained benefits across three core dimensions:
Significant Reduction in Operational Energy Costs
The 1.3 MW system offsets a large share of the common-area load, reducing dependence on grid power and stabilising long-term operating expenses. The result is measurable savings year on year across all four towers, with predictable cost forecasting for BDB management.
Increased Asset Value & Sustainability Compliance
With the solar installation, BDB strengthens its position as an environmentally responsible commercial landmark — critical for modern global compliance, international client expectations, and ESG reporting requirements for a world-class trade hub.
Long-Term Maintenance Security
Tech Solar is responsible for complete Operations & Maintenance (O&M) of the plant for the full lifecycle, ensuring consistent performance, preventive maintenance schedules, system health monitoring, and maximum annual energy generation across all towers.
06 Operational Impact & Results
Performance from Day One
The solar system now delivers:
- Stable, measurable energy savings across all common areas
- Reduced peak load dependency during high-consumption hours
- Stronger resilience during grid fluctuations
- Better long-term predictability of operating costs
- Lower carbon footprint aligned with global ESG standards
- Reliable performance backed by dedicated O&M team
- Improved international standing as a sustainable trade centre
This project stands as an engineering marvel, showcasing what is possible when precision engineering meets large-scale commercial sustainability. It is a testament to Tech Solar’s capability to engineer and execute complex solar systems within the most sensitive commercial environments in India.
