Calculate Your Solar Cost — Right Here
Enter your monthly electricity bill below and get an instant estimate: system size, cost, PM Surya Ghar subsidy, and payback period. No sign-up required.
All Free Solar Calculators
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.
Solar Panel Cost Calculator
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 SavingsSolar ROI Calculator
Find 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 SchemeSolar Subsidy Calculator
Calculate 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 ToolInverter Size Calculator
Add 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 PlanningSolar Loan EMI Calculator
Compare 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 GuideSolar Panel Price List 2026
Current 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 / BackupSolar Battery Backup Calculator
Calculate 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 AnalysisSolar Load Calculator
Add 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 ForecastSolar Energy Savings Calculator
Get 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 GuideSolar in Visakhapatnam
Vizag-specific solar calculator with APEPDCL net metering details, AP state subsidy, local installer costs, and area-wise guides for Visakhapatnam homeowners.
Vizag Solar Guide → NewPM Surya Ghar Yojana Calculator
Calculate your exact ₹78,000 subsidy under PM Surya Ghar Muft Bijli Yojana. Check eligibility, get step-by-step application guide, and see how much free electricity you get.
Check Subsidy → NewSolar Generation Calculator
Find out how many units (kWh) your solar system generates per day, month and year. City-wise sunshine data for all states — Mumbai to Rajasthan.
Calculate Output → NewSolar Panel for AC Calculator
How many solar panels do you need to run a 1 ton, 1.5 ton or 2 ton AC? Get panel count, system size and monthly savings — instantly.
Calculate for AC → NewSolar vs Grid Cost Calculator
25-year side-by-side comparison of solar vs paying grid electricity. See exactly when solar pays back and your total lifetime savings.
Compare Now → NewNumber of Solar Panels Calculator
Enter your monthly bill or appliances — get the exact number of solar panels needed, roof area required and cost after PM Surya Ghar subsidy.
Count My Panels → PopularSolar Bill Simulator
Simulate your electricity bill before and after solar installation. See month-by-month impact with net metering credits factored in.
Simulate Bill → ToolSolar Panel Requirement Calculator
Calculate the exact solar panel capacity needed based on your daily energy consumption and available roof area.
Calculate → ToolSolar Water Heater Calculator
Calculate solar water heater size, cost and savings for your home. Compare flat plate vs evacuated tube collectors.
Calculate → ToolNet Metering Savings Calculator
Calculate your net metering credits and actual electricity bill reduction after exporting surplus solar power to the grid.
Calculate → ToolSolar Panel Degradation Calculator
See how panel efficiency degrades over 25 years and its impact on your generation and savings forecast.
Calculate →⚙️ Advanced Technical Calculators
For installers, engineers, and technically-minded homeowners — precise tools for system design and performance analysis.
Panel Efficiency Calculator
Calculate real-world efficiency after temperature derating, soiling loss, and wiring losses. STC vs actual output comparison.
Check Efficiency → NewSolar Irradiation Calculator
City-wise GHI (Global Horizontal Irradiance) and peak sun hours for 38 Indian cities. Monthly seasonal variation included.
Check Irradiation → NewGeneration Calculator — City-wise
Exact daily, monthly and annual solar generation for your city. Real PSH data for Jaipur, Delhi, Mumbai, Bangalore and 35 more cities.
Calculate by City → NewPanel Angle Calculator — City-wise
Optimal tilt angle for maximum generation based on your city's latitude. Summer vs winter angle, single-axis tracker comparison.
Find Optimal Angle → NewShading Loss Calculator
Calculate generation loss from water tanks, buildings, and trees. String inverter vs microinverter comparison for shaded roofs.
Calculate Shading → NewCable Loss Calculator
DC and AC cable voltage drop, power loss %, and cable sizing recommendation. Prevent performance loss from undersized wiring.
Check Cable Loss → NewBattery Runtime Calculator
How long will your battery last? Supports LFP, NMC, tubular lead-acid. Calculate backup hours for any load with DoD and inverter efficiency.
Calculate Runtime → NewDegradation Calculator
25-year output forecast with year-by-year degradation table. PERC vs TOPCon vs HJT comparison. Annual savings with tariff escalation.
View 25-yr Forecast → NewSystem Comparison Calculator
Compare two solar systems side-by-side — cost, generation, payback, 25-year savings, and LCoE. PERC vs TOPCon, 3kW vs 5kW.
Compare Systems → NewExport Tariff Calculator
Calculate net metering earnings by state — BESCOM, APEPDCL, GUVNL, MSEDCL, Delhi GBI. Monthly and annual export income.
Calculate Export → NewCleaning ROI Calculator
Is panel cleaning worth it? Calculate generation recovered vs cleaning cost. City-wise soiling rates for dusty, average, and coastal locations.
Calculate Cleaning ROI → NewMaintenance Cost Calculator
Annual O&M cost estimate — cleaning, inverter AMC, structural checks. Full 25-year maintenance budget for 1–10 kW systems.
Estimate O&M Cost →💼 Business & Project Tools
For solar installers, dealers, project developers, and investors — financial and business planning tools.
Project Feasibility Calculator
Complete financial analysis — NPV, IRR, payback, LCoE, and 25-year cash flows. Investment-grade report for residential and commercial solar.
Run Feasibility → NewBusiness Profit Calculator
Calculate monthly profit, revenue, and margins for solar installation businesses. Project count, cost per watt, selling price, and overheads.
Calculate Profit → NewLead Cost Calculator
CPL, conversion rate, CPA, and ROAS — know exactly how much each sale costs from your Google Ads, Meta or SolarCalculators.in leads.
Calculate CPL → NewSolar Tender Bid Calculator
Calculate competitive bid price for SECI, NTPC, and DISCOM tenders. Enter your cost per watt and desired margin — get your bid price instantly.
Calculate Bid →Embed These Calculators on Your Website
Are you a solar installer, blogger, or news website? Embed our free calculators on your site — no coding required.
How to Use a Solar Calculator — Step-by-Step
New to rooftop solar? Here's how to use our calculators effectively and understand your results.
Know Your Consumption
Find your monthly electricity bill in units (kWh). A typical 3BHK home uses 200–400 units/month. This is the most important input.
Choose the Right Calculator
Use the Cost Calculator first to know system size and net cost after subsidy. Then use the ROI Calculator for payback period.
Check Subsidy Eligibility
PM Surya Ghar is available to all residential consumers. Maximum ₹78,000 for a 3kW system. Systems above 3kW still get ₹78,000 (capped).
Compare Financing Options
Use our EMI Calculator to compare solar loans from SBI, BOB, and PNB at 7–8% interest with tenures up to 10 years.
Get Quotes from Installers
Once you know your system size and budget, compare quotes from MNRE-empanelled vendors in your city through our marketplace.
Register for Net Metering
After installation, register with your DISCOM for net metering. Excess solar power exported to the grid earns credits at ₹3–4/unit.
Solar Power in India — Key Facts for 2026
India is one of the world's fastest-growing solar markets. Here's what every homeowner should know before investing in rooftop solar.
System Size Guide — What Do You Need?
| 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.
Frequently Asked Questions
Everything you need to know about solar calculators and rooftop solar in India.
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