PM Surya Ghar & Solar Rooftop Calculator
Calculate required solar plant capacity (kW), shadow-free rooftop area, PM Surya Ghar central subsidy (up to ₹78,000), state incentives, net cost, and 25-year ROI savings.
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Solar Rooftop & PM Surya Ghar Subsidy Calculator
Calculate exact solar panel capacity (kW), required roof area, central & state subsidies, net cost, monthly electricity bill savings, and 25-year ROI with zero electricity bills.
System Configurations
≈ 7 Panels (540W) | ~333 sq.ft. roof
Central: ₹78,000
Gross: ₹1,75,000 - Subsidy
Financial ROI & Electricity Savings
Based on standard ~4.5 Peak Sun Hours in India & net metering
25-Year Cash Flow & Cumulative Profit Projection
Assumes 0.7% annual solar panel degradation and 3% yearly grid electricity tariff escalation.
| Milestone | Estimated Annual Savings | Cumulative Net Profit (Post-Investment) | Return on Investment |
|---|---|---|---|
| Day 1 (Installation) | ₹0 | -₹97,000 | Initial Outlay |
| Year 1 | ₹38,873 / yr | -₹58,127 | Recovering Investment |
| Year 5 | ₹42,539 / yr | +₹1,06,425 | Profitable (+110% ROI) |
| Year 10 | ₹47,612 / yr | +₹3,34,112 | Profitable (+344% ROI) |
| Year 15 | ₹53,291 / yr | +₹5,88,953 | Profitable (+607% ROI) |
| Year 20 | ₹59,647 / yr | +₹8,74,189 | Profitable (+901% ROI) |
| Year 25 | ₹66,760 / yr | +₹11,93,442 | Profitable (+1230% ROI) |
How to Claim PM Surya Ghar Subsidy in 4 Easy Steps
Apply online on the official National Portal: pmsuryaghar.gov.in
Register on Portal
Select your State & Electricity Distribution Company (DISCOM), enter Consumer Account Number, Mobile & Email.
Feasibility Approval
Apply for Rooftop Solar installation online. Wait for technical feasibility approval from your local DISCOM.
Installation by Vendor
Get the plant installed by registered MNRE vendors using certified DCR solar panels (ALMM list).
Net Meter & DBT Subsidy
DISCOM inspects & installs bi-directional Net Meter. Submit bank account details for direct subsidy transfer within 30 days.
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PM Surya Ghar & Solar Rooftop Calculator History
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How to Use PM Surya Ghar & Solar Rooftop Calculator – Step-by-Step Calculator Guide
Select calculation mode: By Monthly Electricity Bill (₹), By Rooftop Area (sq ft), or Custom Plant Size (kW)
Select your State to automatically fetch average grid electricity tariffs and state top-up subsidies
Choose Solar System Type (On-Grid with Net Metering, Hybrid, or Off-Grid) and Panel Tech (Mono PERC / TOPCon / Bifacial)
Instantly view required kW capacity, central DBT subsidy, net out-of-pocket investment, and payback period
Explore 25-year cumulative cash flow projections and export a comprehensive Solar Audit PDF report
PM Surya Ghar & Solar Rooftop Calculator – Formula, Computation Rules & Statutory Guidelines
Mathematical Formula for PM Surya Ghar & Solar Rooftop Calculator
Standard Banking & Regulatory Computation Algorithm
Required kW = (Monthly Units / (Peak Sun Hours × 30 × 0.88)); Central Subsidy: 1kW=₹33k, 2kW=₹66k, 3kW+=₹78k; Payback = Net Cost / Annual Bill SavingsExpert Optimization & Financial Pro-Tips
Strategic guidelines to maximize yields and reduce liabilities
Regular recalculations and adjustments can save up to 15-20% in long-term compounding and interest costs.
Review asset allocation and statutory deductions in line with Indian Union Budget 2024–2026 provisions.
Export calculations to PDF or Excel to review your strategy with a verified Chartered Accountant (CA).
Interactive ‘What-If’ Decision Scenarios
Analyze how small changes in inputs compound into significant long-term outcomes
Scenario A: Mobile vs Desktop Processing
All calculations execute 100% client-side inside browser memory with zero cloud telemetry latency.
Scenario B: High Precision Rounding
Output numbers are rounded to exact decimal precision according to statutory Indian standards.
Share Calculation
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Official & Regulatory Verification Links
Cross-verify formulas and rules with official government & regulatory portals
Central Board of Secondary Education (CBSE)
Ministry of Education, Govt of India
Official 9.5 multiplier formula for CGPA to Percentage conversions.
National Informatics Centre (NIC)
Ministry of Electronics & IT
Digital public infrastructure & standard citizen utility specifications.
💡 Statutory & Educational Disclaimer: ToolHind calculations are generated strictly for educational, illustrative, and planning purposes based on standardized actuarial and statutory formulas (Union Budgets 2024–2026, IT Act Sec 87A/16(ia), EPFO/RBI norms).
ToolHind does not provide certified legal, investment, or Chartered Accountancy (CA) advice. Actual tax liabilities or loan approval figures may vary based on individual exemptions, lender policies, or state amendments. Please consult a qualified financial advisor before formal filing.
ToolHind computation algorithms are calibrated against the Indian Union Budget 2024–2026, Finance Act provisions, and applicable statutory guidelines issued by CBDT, RBI, and standard financial regulatory authorities. However, all generated reports and figures are designed strictly for estimation, planning, and educational purposes. Official final tax assessments, loan approvals, and banking schedules remain subject to authorized institutional verification. Users are advised to consult a certified financial advisor or Chartered Accountant for sovereign legal filing.
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