Smart Solar Sizing Tool

Find Out Exactly How Much Solar You Need

Tell us about your home. We'll tell you exactly what to install.

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5 min Time to complete

100% Personalised results

Free No cost, no commitment

MNRE Approved installer

High-efficiency solar panels on a rooftop

How it works

Your Home is Unique. Your Solar System Should Be Too.

Most solar quotes you receive are generic — based on averages, not your actual home. Rayenna's Solar Calculator changes that. Tell us about your home type, the rooms and floors you have, the appliances you run every day, and whether you charge an electric vehicle. Our calculator uses real consumption data to recommend the exact system size, panel type, and number of panels your home needs — along with a financial snapshot showing your payback period and 25-year savings. No guesswork. No salespeople. Just numbers.

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Enter your details

Home type, rooms, and appliances

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Get your recommendation

System size, panels, and roof space

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See your savings

Payback period and lifetime savings

Step 1 of 4 — Your home

About Your Home

Home type

🏠 Independent house Standalone home

🏢 Apartment Flat / unit in a building

🏡 Villa Detached / gated villa

🏘 Row house Terraced / linked home

Bedrooms

Bathrooms

Floors

Your Personalised Recommendation

Recommended system size

— kW

Generates ~— units/year

Est. daily consumption

—

Panels needed

—

Roof space needed

—

PM Surya Ghar subsidy

—

Panel options — Kerala market prices

Tap a panel to see updated numbers

— panels 22.8% efficiency — sq ft ₹29.5/W · — 30yr warranty

— panels 22.2% efficiency — sq ft ₹29/W · — 30yr warranty

— panels 21.8% efficiency — sq ft ₹28.5/W · — 30yr warranty

— panels 21.3% + bifacial gain — sq ft ₹28.5/W · — 30yr warranty

— panels 20.5% efficiency — sq ft ₹27.5/W · — 25yr warranty

Cost breakdown

Panel cost—

Inverter, mounting & installation—

Total system cost—

PM Surya Ghar subsidy—

Net cost to you—

Returns

Est. annual savings—

Payback period—

25-year savings—

CO₂ avoided (25yr)—

Get a personalised quote →

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Important notes on this estimate

What the cost includes
The total system cost shown covers solar PV modules, grid-tied inverter, mounting structure, DC & AC cabling, earthing, net-metering equipment, and complete installation by a certified team. No hidden line items. All applicable taxes and statutory levies, including GST, are additional and will be reflected in the final invoice.
For reference only
All figures are indicative estimates based on prevailing Kerala market rates. Actual costs vary with roof type, shadow analysis, panel brand selection, and site-specific civil work. Our team will conduct a detailed site visit and assessment and provide you with a precise, fixed proposal — at no charge.
About the subsidy
The PM Surya Ghar subsidy is shown as a deduction for illustrative purposes. In practice, the subsidy amount is credited directly to your bank account by the DISCOM or the relevant Government agency after system commissioning and verification — it is not an upfront discount on the invoice.

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Your data stays private

We don't store your inputs. This tool runs entirely in your browser.

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MNRE-approved installer

Every system we install qualifies for the full PM Surya Ghar subsidy.

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Free expert review

Not sure about your results? Our team will review them with you at no cost.

Find Out Exactly How Much Solar You Need

Your Home is Unique. Your Solar System Should Be Too.

Enter your details

Get your recommendation

See your savings

About Your Home

Your Appliances

Your Usage Pattern

Your Personalised Recommendation

N-Type TopCon 620W

N-Type TopCon 600W

N-Type TopCon 580W

Bifacial Dual Glass 580W

Mono PERC 540W

Your data stays private

MNRE-approved installer

Free expert review

Ready to go solar? Let's size your system together.