Free Engineering Tool
Solar Savings Calculator
Enter your monthly electricity bill and roof area to get an instant estimate of your system size, monthly savings, PM Surya Ghar subsidy, and payback period.
SOLAR CALCULATOR & PM SURYA GHAR SUBSIDY ESTIMATOR
Calculate Your Rooftop Solar Savings & Subsidies
Estimate your recommended solar capacity, TANGEDCO net metering offsets, and central PM Surya Ghar Muft Bijli Yojana subsidies with realistic engineering assumptions.
Current Monthly Bill:₹3,500
₹1,000₹12,000₹25,000+
sq. ft.
Recommended System
4 kWp
~17.2 Units/day generationPM Surya Ghar Subsidy
₹78,000
Direct DBT bank creditAnnual Bill Savings
₹37,800
Payback: ~4.5 YearsEngineering Assumptions & Technical Basis
Estimated Monthly Consumption:~500 Units (kWh) / monthDerived from ₹3,500 bill @ ₹7/unit.
Approximate Daily Generation:~17.2 Units (kWh) / day* Assumes ~4.3 peak sun hours/day in Ramanathapuram coastal region.
Estimated Rooftop Requirement:~340 sq.ft shadow-free* Assumes ~85 sq.ft per kW for 550W+ Mono PERC modules and pathways.
Clean Environmental Impact:5.4 Tons CO₂/YrEquivalent to planting ~243 mature trees annually.
Estimated Investment Breakdown
Estimated Turnkey System Cost (Hardware + Installation):₹2,48,000
Less: PM Surya Ghar Central Subsidy (DBT Direct Bank Credit):- ₹78,000
Estimated Net Investment:₹1,70,000
* Note: Calculations are engineering estimates based on standard residential rooftop guidelines in Tamil Nadu. Actual pricing depends on structural requirements, wiring runs, shadow profiles, and site inspection.