Solar Calculator for Homes & Businesses in India
Use your electricity usage, location and roof details to get an indicative solar capacity, panel requirement, generation, savings, system cost and simple payback estimate. The calculator is designed for planning, not as a final engineering quotation.
Build your solar estimate
Enter the information you know. Optional details improve the practical estimate.
Monthly units take priority. When units are not entered, bill ÷ tariff is used for an indicative consumption estimate.
A practical starting point for solar planning
Choosing a solar system starts with understanding how much electricity you use and how much solar your property can reasonably support. Solar Vyapar's calculator brings these inputs together so you can review an indicative system size before speaking with a solar professional.
The estimate can use monthly electricity units or an electricity bill with an average tariff. It also considers your state, city or district, available roof area, panel wattage, shading, roof type, customer type and preferred solar system. These inputs help make the estimate more useful than a generic solar-size calculation.
What this calculator estimates
- Recommended solar capacity
- Indicative panel requirement
- Monthly and annual generation
- Estimated electricity savings
- Indicative system cost
- Residential CFA where applicable
- Simple payback period
- Basic roof-area feasibility
Final system size, equipment selection, subsidy eligibility, pricing and expected generation should be confirmed after a site assessment and with the applicable DISCOM and government requirements.
From your electricity bill to a practical estimate
We separate consumption, location, roof feasibility and financial assumptions instead of giving one generic number.
Consumption
Monthly units or bill are converted into annual energy demand.
Location
State and city/district are used for the indicative yield assumption.
Roof fit
Panel requirement is compared with practical planning area.
Finance
Cost, savings, CFA and simple payback are displayed separately.