Solar Savings, Sizing & PM Surya Ghar Subsidy Calculator
Estimate your recommended system capacity, central government subsidy, rooftop space requirements, and 25-year financial savings based on your DISCOM electricity tariff.
1. Enter Your Power Consumption
Select your state, property category, and monthly electricity units from your latest power bill.
How We Calculate Your Solar Sizing & Returns
Our mathematical estimation engine is built on deterministic engineering standards.
1. Solar Yield Factor
Eastern India receives an average of 4.0 Peak Sun Hours (PSH) per day, producing 120 kWh of electricity per kilowatt-peak capacity per month.
2. Subsidy Architecture
Residential systems receive official Central Government PM Surya Ghar subsidies (₹30,000 for 1kW, ₹60,000 for 2kW, capped at ₹78,000 for 3kW+).
3. Payback & Degradation
Payback is calculated as Net Capital Outflow divided by Annual Bill Savings, modeling 25-year Tier-1 panel linear degradation at 0.7% annually.
Electricity Board Tariff Reference Matrix
Baseline domestic and commercial power tariffs used in financial yield calculations.
| State / DISCOM | Domestic | Commercial | Net-Metering |
|---|---|---|---|
| Jharkhand JBVNL / TSUISL | ₹ 6.50 | ₹ 8.50 | Active (Bidirectional) |
| Bihar NBPDCL / SBPDCL | ₹ 7.00 | ₹ 8.80 | Active |
| West Bengal WBSEDCL / CESC | ₹ 7.20 | ₹ 9.20 | Active |
| Odisha TPCODL / TPNODL | ₹ 6.00 | ₹ 8.00 | Active |
| Uttar Pradesh UPPCL | ₹ 7.00 | ₹ 9.00 | Active |
| Maharashtra MSEDCL / Tata | ₹ 8.50 | ₹ 11.50 | Active |
Solar Sizing & Subsidy FAQs
How accurate is this solar calculator estimate?
This calculator uses official MNRE solar insolation benchmarks (4.0 kWh/kWp/day in Eastern India) and actual JBVNL tariff schedules. Exact physical sizing, panel layout, and shading analysis will be verified during JDC Solar's free on-site roof inspection.
How is the ₹78,000 PM Surya Ghar subsidy received?
The central subsidy is credited directly into your linked bank account via Direct Benefit Transfer (DBT) within 30 days of JBVNL bidirectional net-meter commissioning. JDC Solar handles 100% of the National Portal registration and paperwork.
How much rooftop space do I need for a 3 kW or 5 kW system?
Each 1 kWp of solar capacity requires approximately 100 square feet (9.3 sq.m) of shadow-free rooftop space. A 3 kW home system requires roughly 300 sq.ft, while a 5 kW system needs about 500 sq.ft.
Can commercial enterprises claim the PM Surya Ghar subsidy?
Commercial and industrial installations do not receive direct PM Surya Ghar DBT subsidies. Instead, businesses can claim Section 32 Accelerated Depreciation (40% Year 1 tax shield), which delivers even larger financial returns for corporate tax-paying entities.