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Solar Load Calculator — Estimate Your Solar System Size

Use our free solar load calculator to find out exactly how many solar panels your home needs, the recommended kW capacity, rooftop area, and how much you can save with the PM Surya Ghar government subsidy.

Home/Solar Load Calculator

Brightleaf Energy's solar load calculator is a free online tool that helps homeowners and businesses in Delhi NCR estimate their ideal rooftop solar system size. Simply select your household appliances and daily usage, and the calculator instantly shows you the recommended system capacity, number of solar panels, rooftop area required, government subsidy amount, and projected annual savings.

Whether you are exploring residential solar panels for your home in Delhi, Gurugram, Noida, Ghaziabad, or Faridabad, or evaluating a commercial installation for your business, this solar load calculation tool provides accurate estimates based on India's average peak sun hours and current PM Surya Ghar subsidy rates.

Interactive Solar Load Calculator

Calculate Your Solar Capacity & Government Subsidy

Select your household or commercial appliances below to estimate your exact solar power needs, rooftop area required, and annual electricity bill savings.

Property Type:

Select Appliances & Operating Hours

❄️
1.5 Ton Inverter AC
1500 Watts
Qty:1
Hours/Day:
🌀
Ceiling Fans
75 Watts
Qty:4
Hours/Day:
💡
LED Bulbs & Lights
15 Watts
Qty:10
Hours/Day:
🧊
Refrigerator (250L)
200 Watts
Qty:1
Hours/Day:
📺
Smart TV (55 inch)
100 Watts
Qty:1
Hours/Day:
🧺
Washing Machine
500 Watts
Qty:1
Hours/Day:
🚰
Water Pump / Motor (1 HP)
750 Watts
Qty:1
Hours/Day:

Your Solar Estimates

Based on standard peak sun hours

Recommended Plant Capacity
5.5kW

Generates approx. 23.1 Units/Day (692 Units/Month)

Solar Panels Needed
11 Panels
540W Monocrystalline
Rooftop Area Required
440 Sq. Ft.
Shadow-free roof space
Est. Govt. Subsidy
₹78,000
PM Surya Ghar Subsidy
Annual Bill Savings
₹66,384 / Yr
Payback: ~3.8 Yrs
Estimated Net System Cost
₹2,52,000
Subsidy Included
How It Works

3 Simple Steps to Your Solar Estimate

01

Select Your Appliances

Choose the appliances in your home — ACs, fans, lights, fridge, TV, washing machine, water pump — and set how many hours each runs per day.

02

Get Your Solar Load

The calculator instantly computes your daily electricity consumption and recommends the optimal solar system size in kW, number of panels, and rooftop area needed.

03

Download Your Report

Get a detailed solar report with savings breakdown, government subsidy, payback period, and CO₂ offset — sent to your email by our solar experts.

Why Use Our Calculator

Benefits of the Solar Load Calculator

Instant Results

Get your solar system recommendation in seconds — no registration or personal details required.

Accurate Estimates

Calculations based on India's average peak sun hours (4.2 hrs) and current PM Surya Ghar subsidy rates.

Cost Breakdown

See the full picture: system cost, government subsidy, net investment, annual savings, and payback period.

PM Surya Ghar Subsidy

Automatically calculates your eligible government subsidy under the PM Surya Ghar Muft Bijli Yojana.

Email Report

Download a detailed solar report with all calculations sent to your email for future reference.

Expert Consultation

Get a free on-site assessment from our certified solar engineers after your calculation.

Frequently Asked Questions

Solar Load Calculator — FAQs

How does the solar load calculator work?+
The solar load calculator estimates your daily electricity consumption based on the appliances you select and their usage hours. It then calculates the recommended solar system size (in kW), number of panels needed, rooftop area, government subsidy under PM Surya Ghar, and your potential annual savings.
What is the formula for solar load calculation?+
Solar load is calculated as: Total Daily Watt-Hours = Sum of (Appliance Wattage × Count × Hours Used). The recommended system size in kW is derived by dividing daily kWh by the average peak sun hours (4.2 hours in India). Panel count is then System kW × 1000 ÷ Panel Wattage (540W for Tier-1 panels).
How accurate is this solar load calculator?+
The calculator provides a reliable estimate based on standard appliance wattages and average peak sun hours for India (4.2 hours). Actual generation may vary based on panel orientation, shading, inverter efficiency, and local weather. For a precise assessment, book a free site survey with our solar engineers.
What is the PM Surya Ghar subsidy for residential solar?+
Under the PM Surya Ghar Muft Bijli Yojana, residential homeowners can receive: ₹30,000 for 1 kW systems, ₹60,000 for 2 kW systems, and up to ₹78,000 for 3 kW and above systems. This subsidy significantly reduces your net investment cost.
How many solar panels do I need for my home?+
The number of panels depends on your daily electricity consumption. As a guide: a typical Indian home using 8–12 units/day needs a 3–5 kW system with 6–10 panels (540W Tier-1). Our calculator gives you the exact count based on your specific appliance usage.
What size rooftop area is needed for solar panels?+
Approximately 80 sq ft of shadow-free rooftop space is needed per kW of solar capacity. A 5 kW system requires about 400 sq ft. Our calculator estimates the exact area based on your recommended system size.
Can I use the solar load calculator for commercial properties?+
Yes, the calculator works for both residential and commercial properties. Toggle the property type at the top of the calculator. Note that government subsidies under PM Surya Ghar apply only to residential installations. Commercial properties may benefit from accelerated depreciation and other tax incentives.
How much can I save per month with solar panels?+
Savings depend on your current electricity consumption and tariff rate. A 5 kW residential solar system typically generates 550–700 units per month, saving ₹5,000–₹10,000 monthly at ₹8/unit average tariff. After the 3–5 year payback period, the electricity is essentially free for 20+ years.
What appliances can solar power run?+
A properly sized solar system can run all household appliances including air conditioners, fans, lights, refrigerators, TVs, washing machines, water pumps, and more. The key is matching your total daily consumption to the solar system capacity — our calculator handles this automatically.
How long does it take to install a solar system after calculation?+
After you get your solar load calculation and decide to proceed, the typical installation timeline is 2–4 weeks. This includes site survey, system design, documentation, subsidy application, installation, and grid connection. Most installations are completed within 1–3 working days once approvals are in place.

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Speak with our solar experts in Delhi NCR

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+91 8800966764
Head Office Location
Greater Kailash II, New Delhi
Send Us an Email
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Schedule Your Free Rooftop Solar Consultation

Speak directly with our clean energy engineers. We will analyze your roof feasibility, calculate your government subsidy, and provide a customized quote.

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Visit our office or reach out to our team via phone or email.

Head Office Address

Spacetime Centre, DESEIN HOUSE, Greater Kailash II, Chittaranjan Park, New Delhi, Delhi 110048, India

Phone Helpline

+91 8800966764

Working Hours

Mon - Sat: 9:00 AM - 6:00 PM

Sunday: Closed

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Response Time
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Site Visit
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