How it works
Sizes a rooftop solar system based on your consumption, models 25 years of cash flows (electricity savings, net metering credits, MNRE subsidies, O&M costs), and calculates payback period, ROI, and NPV. Upload your bill PDF or enter consumption manually.
When to use this
If you own a property with an unshaded roof and pay Rs.2,000+/month for electricity. Also useful to benchmark vendor quotes: run conservative assumptions to identify inflated projections.
Frequently asked questions
What is net metering?
Net metering lets you export excess solar power to the grid for bill credits. Most Indian states permit it for residential systems, but rates and rules vary by DISCOM.
How much does rooftop solar cost in 2026?
Approx ₹50–65K per kWp installed. A 3 kWp system for a 2–3 BHK costs ₹1.5–2L before the PM Surya Ghar subsidy (₹14.5–18K per kWp for residential).
How long do panels last?
Tier-1 panels carry a 25-year warranty (80%+ output at year 25, ~0.5–0.7% annual degradation). Inverters typically last 10–12 years and are the most likely component to need replacement.