Group Captive Wind Power Savings Calculator (India)
See how much your factory or business can save on its electricity bill by buying equity in a group captive wind power project — without building or operating a turbine yourself.
How to Calculate Group Captive Wind Power Savings
Under India's Electricity Rules, 2005, an industrial or commercial consumer who holds at least 26% equity in a generating company and consumes at least 51% of its output qualifies that power as "captive." Captive power is exempt from cross-subsidy surcharge (CSS) — the single biggest cost that makes open-access power expensive — so the effective landed cost of captive wind is usually well below your DISCOM industrial tariff.
Effective Captive Cost = Captive Power Rate + Wheeling & Banking Charges
Savings per Unit = DISCOM Industrial Tariff − Effective Captive Cost
Monthly Savings = Units Consumed × Savings per Unit
Annual Savings = Monthly Savings × 12
Payback on Equity = Equity Investment / Annual Savings
Worked example: A factory consuming 3,00,000 units/month pays ₹8.5/unit to the DISCOM. It buys equity in a group captive wind project at an effective landed cost (captive rate + wheeling/banking charges) of ₹6.2/unit — a saving of ₹2.3/unit. That's ₹6,90,000/month, or ₹82,80,000/year. Against a ₹1.2 crore equity investment for its allocated capacity, the payback is under 18 months, after which the annual saving is pure upside for the life of the project (20+ years).
Group Captive Wind Power FAQs
Savings per unit = DISCOM Industrial Tariff − (Captive Power Rate + Wheeling & Banking Charges). Monthly Savings = Units Consumed × Savings per unit. Payback on Equity = Equity Investment ÷ Annual Savings. See the worked example above, or enter your own numbers in the calculator.
Under Electricity Rules 2005, you must hold at least 26% equity in the generating company and consume at least 51% of its output to qualify as a captive user. Equity requirement is typically ₹1–1.5 crore per MW of allocated capacity, though this varies by developer and state — most SMEs buy a small fractional stake sized to their own consumption, not a full MW.
Industrial consumers typically save 15–30% on their electricity bill through group captive wind power compared to standard DISCOM industrial tariffs, after accounting for wheeling charges, banking charges, and transmission losses. Savings are higher in states with high industrial tariffs like Maharashtra, Tamil Nadu, and Gujarat, and lower in states with cheaper DISCOM power.
Wheeling charges are paid to the DISCOM for using their grid to transmit your captive power from the generation site to your facility, typically ₹0.5–1.2/unit. Banking charges apply when you draw power at a different time than the turbine generates it (common with wind, since it doesn't generate on a fixed schedule) — DISCOMs "bank" your surplus and let you draw it later, usually for a fee of 2–9% of banked units depending on the state.
🏭 Group Captive Savings Calculator
Your Current Consumption
Captive Power Terms
Rate charged by the wind developer, before wheeling/banking