SOLAR • GST • LOAD CALCULATOR

Smart Solar Calculator

Calculate home electrical load, solar panel requirement, rooftop space, expected generation, solar project cost, GST and subsidy in one place.

⚡

Electrical Goods / Appliance Load

Add bulbs, fans, TV, refrigerator, AC, pump and other electrical appliances.

Product / Electronic Goods Qty Watts / Item Usage Hours / Day Total Watts Daily Units Remarks Remove

⚡
Total Connected Load
1323 W
Connected electrical load
🔌
Total Load
1.32 kW
Approx. connected load
☀
Daily Consumption
5.3
Units / day
📅
Monthly Consumption
159
Units / month
🏠
Available Space
500
sq.ft. rooftop
☀

Solar System Recommendation

Based on electricity consumption and appliance load

⚡
Recommended Solar
3.0 kW
Recommended capacity
🔋
Panel Quantity
6
550 W panels
☀️
Daily Generation
11.9
Units / day
📅
Monthly Generation
356
Units / month
🏠
Required Roof
132
sq.ft.
System Type On-Grid
Actual Panel Capacity 3.30 kW
Connected Appliance Load 1,323 W
Estimated Appliance Consumption 159Units / Month
Bill Consumption Used 300Units / Month
Yearly Solar Generation 4,336Units
Available Rooftop Space 500sq.ft.
Required Rooftop Space 132sq.ft.
Space Analysis: Sufficient rooftop space
Available extra space: 368sq.ft.
💰

Solar Project Cost

Estimated project pricing

Solar Capacity 3.30 kW
Base Solar Cost ₹181,500.00
GST Rate 8.90%
GST Amount ₹16,153.50
Total Including GST ₹197,653.50
Estimated Subsidy ₹0.00
Estimated Payable ₹197,653.50
₹

GST Calculator

Inclusive / Exclusive GST calculation



Input Amount ₹100,000.00
GST Rate 8.90%
GST Amount ₹8,900.00
Final Amount ₹108,900.00
ℹ

Solar Calculation Information

Important information for sales and site survey

How the calculator works

The appliance calculator multiplies:

Quantity × Watts × Usage Hours

to estimate daily electricity consumption.

Solar generation is estimated using:

Solar kW × Peak Sun Hours × 80% Performance Ratio

The rooftop calculation uses the number of panels and the approximate area required per panel.

The final system size should be confirmed after a professional site survey, shadow analysis, roof measurement, electrical assessment and applicable DISCOM / government requirements.
SolarConnect brand ambassador (AI illustration) showing a solar savings chart on a tablet – rooftop solar savings calculator by SolarConnect India Illustration

SolarConnect India · Solar Savings

Turn Your Estimate into Real Savings

Calculator results are a starting point. Get an exact quote and subsidy-adjusted savings for your roof with a free SolarConnect site survey.

  • Exact quote for your roof
  • Subsidy-adjusted savings
  • No-obligation site survey
Get a Free Site Survey Call 033 3183 5203

SolarConnect team: 033 3183 5203 · Mon–Sat, 10:30 AM – 6:30 PM · Contact us

Image: SolarConnect brand ambassador (AI illustration).

FAQ

Solar calculator questions

How does the SolarConnect solar calculator estimate generation?

It uses the formula shown on this page: solar kW × peak sun hours × 80% performance ratio. The result is an estimate, not a guarantee.

How is the required rooftop space worked out?

The calculator multiplies the number of panels by the approximate area needed per panel. A common planning figure is about 70–100 sq ft per kW, but the real layout depends on panel size, roof shape, shading and access.

Is the calculator result the final system size?

No. The final system size should be confirmed after a professional site survey, shadow analysis, roof measurement, electrical assessment and the applicable DISCOM / government requirements.

Can I get the PM Surya Ghar subsidy on the system I calculate?

PM Surya Ghar: Muft Bijli Yojana gives central financial assistance to eligible residential grid-connected rooftop solar, applied for through the official portal pmsuryaghar.gov.in. SolarConnect handles scheme cases through its registered vendor partner Pro Power Energies.