Solar Calculator

Calculate the right solar system size for your home or business. Estimates are indicative and configurable — not a final quotation or subsidy guarantee.

Usage Type

Electricity Unit Rate (₹ per kWh)

For Goa, Electricity Department slab rates are used. Type a rate only if your bill uses a different tariff.

Monthly Electricity Bill (₹)

State

Goa state SFA applies when State is Goa.

City

Rooftop Type

Phase Type

All calculator figures are estimates based on configurable assumptions. Final quotations are provided after site assessment.

Cost Breakdown

System Size—

Solar Panel Cost—

Inverter Cost—

Mounting Structure Cost—

Installation & Commissioning—

Other Applicable Costs—

Total System Cost—

Central Subsidy / CFA (estimate)—

State Subsidy / SFA (estimate)—

Total Government Subsidy (estimate)—

Final Payable Amount—

Central CFA is for eligible residential consumers (PM Surya Ghar). Goa state SFA is added when State = Goa.

PM Surya Ghar Eligibility

Guidance checklist only. Do not treat this as approval.

I own a house with suitable rooftop space.

I have a valid residential electricity connection.

I have an Aadhaar and eligible bank account.

Official Portal

Money Saved Per Year

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CO₂ Reduction

—

Payback Period

—

Calculation Formula

Enter bill or units to see the formula explanation.

Get Full Solar Savings Report on WhatsApp

Enter your details and receive a personalized solar savings summary with estimated system cost and quotation assistance.

Customer Name

Mobile Number

Email (optional)

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Ready to Go Solar?

Get customized solar quotations from Wattmeister Energy LLP. Uses the same calculator details as the WhatsApp report.