Search your address in the tool, trace your rooftop on the satellite map, and the calculator divides your usable roof area by the panel size you select (500W–650W). The layout generator then draws each panel on your roof, avoiding water tanks and other obstacles, to give an exact count.

A 1 kW rooftop solar system typically needs about 5–6 square metres (55–65 sq.ft) of shadow-free roof area using modern high-wattage panels. A 5 kW home system therefore needs roughly 25–30 square metres.

Savings depend on your system size and electricity tariff. In India, each kW of rooftop solar generates about 1,400–1,600 kWh per year. At a tariff of ₹8 per unit, a 5 kW system saves roughly ₹4,800–₹5,300 per month. The tool calculates this precisely for your roof and tariff.

Most residential and commercial rooftop solar systems in India pay for themselves in 3–5 years, after which they generate essentially free electricity for the remainder of their 25+ year lifespan. Subsidies under PM Surya Ghar Muft Bijli Yojana can shorten this further for homes.

The tool uses Google satellite imagery and geometry to measure your actual roof, real panel dimensions for layout, and standard Indian generation factors, so estimates are typically within 5–10% of a professional survey. Rayzon Solar validates every estimate with a free site survey before final proposal.

Yes, the assessment tool is completely free with no registration required. You only share your contact details if you want a detailed proposal and free site survey from Rayzon Solar's engineering team.