Free Calculator · 2026 Electricity is one of the biggest operating costs for factories in Tamil Nadu. Whether you’re on TANGEDCO’s LT-3, HT-1, or HT-2 tariff slab, this free solar savings calculator shows you exactly how much your factory can save by switching to solar — under
Compare rooftop solar and small wind turbine ROI side-by-side. Enter your TANGEDCO bill, system size, and cost — get instant payback period, net savings, and 10-year cumulative trend for your Chennai property. ⏱️ How to use (1–2 mins) FAQ