Solar Savings Calculator
Enter your solar system size and electricity details. Get your exact payback year, 10-year and 25-year ROI, and total lifetime profit — with annual electricity price escalation factored in.
System Details
Property Type
What Does This Calculator Show You?
Every output that matters when deciding whether solar is worth the investment.
Payback Period
Years it takes for electricity savings to fully recover the net investment after subsidy. Typically 4–7 years for residential systems.
10-Year & 25-Year ROI
Total return on investment as a percentage at both milestones, accounting for the annual electricity price escalation you set.
Investment Breakdown
Gross system cost, PM Surya Ghar subsidy, and net investment you actually pay — all calculated transparently.
Lifetime Profit
Total cumulative savings over 25 years minus net investment. The actual rupee profit your solar system generates.
Solar Payback Period in India
Most residential solar systems pay back in 4–7 years after the PM Surya Ghar subsidy. Consumers paying ₹9–₹12/unit (common in Maharashtra, Tamil Nadu, Karnataka) see payback in 3–5 years, while lower-tariff states take 6–8 years. Annual electricity price escalation of 5–8% accelerates break-even significantly — the higher the escalation, the sooner your savings compound past your investment.
Why Electricity Escalation Changes Everything
India's tariffs have risen ~5–8% annually over the past decade. A 3 kW system saving ₹2,100/month today saves the equivalent of ₹50,000+/year by year 10 and ₹1 lakh+/year by year 20 — because the grid gets more expensive while solar stays free. This is why 25-year ROI figures of 250–400% are realistic, not inflated.
Don't know your system size yet?
Use the Solar System Calculator first — enter your monthly bill and get the right kW recommendation in 30 seconds.