At CITI Towers (6 Floors, LA1D Service), the real electricity burden wasn’t inside the homes
it was in the common facilities running every single minute.
From early morning water pumping to late evening lighting, the EB meter never really slowed down.
LA1D (or LT Tariff 1D) is a specific tariff category introduced by TANGEDCO in Tamil Nadu to manage common electricity supply for residential apartment complexes, including services like lighting, water pumps, lifts, sewage treatment plants, and gyms.
Net Metering Advantage for LA1D
LA1D connections are eligible for net metering—excess solar power isn’t wasted, it’s credited back through EB. This ensures every unit generated works double — reducing bills and maximizing system efficiency.
The Real Situation
After reviewing their EB consumption, one thing was clear — the major load came from:
- Lift operations across all 6 floors (150 Houses)
- Borewell pump for daily water supply
- Sewage Treatment Plant (STP) & Water Treatment Plant (WTP)
- Common area lights (corridor, parking, outdoor)
- Office area usage (lights & fans)
This wasn’t a fixed load. It kept fluctuating throughout the day, making it a typical common facility challenge.
Why They Chose Solar
The decision wasn’t just about “going green”.
It was practical:
- 📈 Increasing EB bills month by month
- ⚙️ Continuous daytime load from pumps & systems
- 🔁 Repetitive operational cost with no control
- 🏢 Shared expenses becoming a concern for residents
They needed a solution that could reduce EB dependency without affecting daily operations.
That’s where solar made sense.
Real-Time Impact on Operations
Now, during peak sunlight hours:
- Borewell pump runs partially on solar
- STP & WTP operations are supported
- Common lighting load is offset
- Lift auxiliary consumption is reduced
This directly cuts down EB usage where it matters most — daytime demand.
The Solution: A Precisely Designed Solar System for LA1D
After detailed site analysis and load study, we implemented:
- System Size: 9.6 kW
- Modules: Vikram Solar 600W × 16 Nos
- Inverter: Polycab 10 kW
- Cables: Polycab 6sqmm
- Lightning arrestor & Earthing: As per industry standards
Engineered and implemented in strict compliance with industrial-grade earthing standards, ensuring superior safety and long-term reliability.
The Result
- Reduced EB dependency for common loads
- Optimized operational cost for residents
- Smoother energy management during daytime
- Sustainable and future-ready infrastructure
Final Thought
This project proves one simple thing:
Solar is not just for houses —
it’s a powerful solution for Apartment complex & Apartment towers, where consumption is huge, continuous and unavoidable.
When planned correctly, it doesn’t just save electricity —
it solves a real, everyday problem.
Solar isn’t just installation — its practical problem solving.
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