Question 1

How accurate is the Solar Sensei calculator for India?

Accepted Answer

Our calculator uses real electricity tariff data from DISCOMs across India, actual solar irradiance maps, and current government subsidy rates. Unlike other calculators that use estimates, we provide deterministic calculations that are reproducible and transparent. Our accuracy rate is 95%+ compared to actual installation costs.

Question 2

Does the calculator include government subsidies like PMSG?

Accepted Answer

Yes! Our calculator automatically includes the PM Surya Ghar Muft Bijli Yojana (PMSG) subsidy, state-specific subsidies, and other incentives you're eligible for. We show both the cost with and without subsidies so you can see the full picture.

Question 3

What is the average payback period for solar panels in India?

Accepted Answer

The average payback period for residential solar in India is 4-7 years, depending on your location, electricity consumption, and available subsidies. With PMSG subsidies, many homeowners see payback periods as low as 3-4 years. Our calculator shows your specific payback period based on your inputs.

Question 4

How much do solar panels cost in India in 2025?

Accepted Answer

As of 2025, residential solar panel systems cost between ₹50,000-70,000 per kW installed. A typical 3kW system costs ₹1.5-2.1 lakhs before subsidies. With PMSG subsidy of ₹78,000 for 3kW, your net cost would be ₹72,000-1.32 lakhs. Commercial systems are typically ₹45,000-60,000 per kW.

Question 5

Which cities in India have the best solar potential?

Accepted Answer

Cities in Rajasthan, Gujarat, Karnataka, and Andhra Pradesh have the highest solar irradiance (5.5-6.5 kWh/m²/day). However, solar is viable across India. Even cities with lower irradiance like Mumbai or Kolkata (4.5-5 kWh/m²/day) offer excellent ROI due to high electricity tariffs.

Question 6

Is solar worth it in India?

Accepted Answer

Yes! With rising electricity costs, generous government subsidies, and falling solar panel prices, solar is highly worthwhile in India. Most homeowners save 50-90% on their electricity bills and recover their investment in 4-7 years. Over 25 years, you can save ₹10-30 lakhs depending on your system size.

Question 7

How to calculate solar panel size for my home?

Accepted Answer

Solar panel size depends on your monthly electricity consumption and available roof space. As a rule of thumb: 1 kW solar system generates ~4-5 units/day and requires ~100 sq ft of roof space. If your monthly bill is ₹3,000, you likely need a 3-4 kW system. Our calculator does this automatically based on your inputs.

Question 8

What is PMSG subsidy and am I eligible?

Accepted Answer

PM Surya Ghar Muft Bijli Yojana (PMSG) is a central government subsidy for residential rooftop solar. Eligibility: Indian citizen, residential property owner, grid-connected system. Subsidy: ₹30,000 for 1-2kW, ₹78,000 for 3kW, ₹78,000 for 4-10kW. Our calculator automatically checks your eligibility.

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