The Ambattur Factory: Before Solar
Karthik Murugan runs a mid-sized garment manufacturing unit in Ambattur Industrial Estate, Chennai. Before solar, his factory's monthly EB bill consistently exceeded ₹60,000 — one of his biggest operating expenses after labour.
The System Design
| Specification | Details |
|---|---|
| System Size | 50 kW On-Grid |
| Panel Brand | Waaree 540W (93 panels) |
| Inverter | Sungrow 50kW String Inverter |
| Roof Area Used | ~3,200 sq ft |
| Installation Time | 12 days |
| TANGEDCO Approval | Net metering, 1 MW limit |
Results After 10 Months
- Monthly EB bill reduced from ₹60,000 to ₹18,000 (70% reduction)
- Annual savings: ₹5,04,000
- System cost after accelerated depreciation benefit: ₹9,80,000
- Projected payback: 1.9 years
- 25-year projected savings: ₹1.26 crore
Commercial and industrial solar installations qualify for 40% accelerated depreciation in Year 1, dramatically reducing the effective cost.
What Karthik Says
"Heliostrom completed the installation in under 2 weeks without disrupting our production schedule. The TANGEDCO approval was handled completely by their team. My EB bill dropped by 70% from the first month. ROI will happen in under 2 years." — Karthik Murugan, Ambattur
