India's most complete free solar calculator suite. Instantly calculate cost, subsidy, ROI, EMI, battery size, and inverter capacity for your home or business.
Whether you're planning a rooftop solar installation, comparing quotes, or applying for a government subsidy — our calculators give you instant, accurate results tailored to India's 2026 prices and policies. No sign-up required. 100% free.
Enter your monthly electricity bill and get an instant estimate — system size, total cost, PM Surya Ghar subsidy, and net payable amount tailored to 2026 Indian prices.
Calculate Cost → Plan Your SavingsFind your exact return on investment, payback period, and 25-year savings. See month by month how quickly your solar panels pay for themselves.
Calculate ROI → Government SchemeCalculate your exact PM Surya Ghar subsidy — ₹30,000/kW for first 2kW + ₹18,000 for third kW (max ₹78,000). Check state-level additional subsidies too.
Check Subsidy → Technical ToolAdd your appliances (fans, ACs, lights, fridge, TV) and get the exact inverter VA capacity you need — plus battery Ah requirements and estimated costs for top brands.
Size My Inverter → Finance PlanningCompare solar loan EMIs across SBI, Bank of Baroda, PNB, Canara Bank, and HDFC. Calculate monthly instalments, total interest, and full amortisation schedule.
Calculate EMI → Price GuideCurrent prices for Adani, Tata, Waaree, Vikram, and Luminous panels. Compare price-per-watt, efficiency, and total system costs from 1kW to 10kW.
View Prices → Off-Grid / BackupCalculate the exact battery capacity (Ah) needed for your load and desired backup hours. Compare battery types — lead acid, lithium, and tubular — with costs.
Calculate Battery → Load AnalysisAdd all your electrical appliances with their wattage and usage hours to find your total daily kWh load — the foundation for sizing any solar system accurately.
Calculate Load → 25-Year ForecastGet a complete 25-year wealth forecast — monthly savings, cumulative returns, and lifetime CO₂ offset. See how much your solar investment earns over its full lifetime.
See Savings → City GuideVizag-specific solar calculator with APEPDCL net metering details, AP state subsidy, local installer costs, and area-wise guides for Visakhapatnam homeowners.
Vizag Solar Guide →Are you a solar installer, blogger, or news website? Embed our free calculators on your site — no coding required.
New to rooftop solar? Here's how to use our calculators effectively and understand your results.
Find your monthly electricity bill in units (kWh). A typical 3BHK home uses 200–400 units/month. This is the most important input.
Use the Cost Calculator first to know system size and net cost after subsidy. Then use the ROI Calculator for payback period.
PM Surya Ghar is available to all residential consumers. Maximum ₹78,000 for a 3kW system. Systems above 3kW still get ₹78,000 (capped).
Use our EMI Calculator to compare solar loans from SBI, BOB, and PNB at 7–8% interest with tenures up to 10 years.
Once you know your system size and budget, compare quotes from MNRE-empanelled vendors in your city through our marketplace.
After installation, register with your DISCOM for net metering. Excess solar power exported to the grid earns credits at ₹3–4/unit.
India is one of the world's fastest-growing solar markets. Here's what every homeowner should know before investing in rooftop solar.
| Monthly Usage | Recommended Size | Gross Cost | Subsidy | Net Cost | Payback |
|---|---|---|---|---|---|
| 100–200 units | 1 kW | ₹60,000 | ₹30,000 | ₹30,000 | 2–3 years |
| 200–300 units | 2 kW | ₹1.10 lakh | ₹60,000 | ₹50,000 | 2–4 years |
| 300–500 units | 3 kW ⭐ Best Value | ₹1.75 lakh | ₹78,000 | ₹97,000 | 3–4 years |
| 500–700 units | 5 kW | ₹2.50 lakh | ₹78,000 | ₹1.72 lakh | 4–5 years |
| 700–1000 units | 8 kW | ₹4.30 lakh | ₹78,000 | ₹3.52 lakh | 4–6 years |
| 1000+ units | 10 kW | ₹5.50 lakh | ₹78,000 | ₹4.72 lakh | 5–7 years |
*Indicative prices for on-grid systems with Tier-1 panels. Actual costs vary by location, brand, and installer.
Everything you need to know about solar calculators and rooftop solar in India.