A complete comparison of Solar and Wind power systems covering costs, ROI, installation, efficiency, maintenance, and viability for Indian homes and businesses.
Best For
Homes, offices, rooftops, all Indian locations
Installation Cost (3kW)
₹1,50,000 - ₹2,00,000 (post-subsidy)
Payback Period
4-6 years
Suitability
✅ Works everywhere in India
Best For
Open land, high-wind zones, large-scale projects
Installation Cost (1kW)
₹2,00,000 - ₹3,00,000 (no major subsidy)
Payback Period
6-10 years
Suitability
⚠️ Only coastal/hilly areas
| Parameter | Solar Energy | Wind Energy |
|---|---|---|
| Cost per kW | ₹50,000 - ₹65,000 | ₹2,00,000 - ₹3,00,000 |
| Government Subsidy | ✅ ₹18,000/kW (up to 3kW) | ❌ Limited/None for small scale |
| Space Requirement | 100 sq ft per kW (rooftop) | 500+ sq ft ground clearance |
| Installation Time | 1-3 days | 7-15 days (permits, foundation) |
| Efficiency | 18-22% (modern panels) | 30-45% (in optimal wind) |
| Energy Generation | 4-5 units/kW/day (avg) | 2-8 units/kW/day (variable) |
| Lifespan | 25+ years (panels), 10 years (inverter) | 20-25 years (with maintenance) |
| Maintenance Cost | ₹2,000-5,000/year (cleaning) | ₹15,000-30,000/year (mechanical) |
| Noise | Silent operation | 40-50 dB (noticeable hum) |
| Location Dependency | Low (works 90% of India) | Very High (15-20% suitable zones) |
| Regulatory Approvals | Minimal (net metering, DISCOM) | Extensive (height, safety, aviation) |
| Residential Viability | ✅ Excellent | ❌ Poor (except farms) |
For 95% of Indian Homes & Businesses: Solar Wins
Unless you're in specific wind zones (Tamil Nadu, Gujarat coastal, Rajasthan), solar offers better ROI, faster payback, lower maintenance, and simpler installation. Wind is suitable for utility-scale projects in high-wind regions only.
Wind Speed: 7-9 m/s avg
Wind Speed: 5-7 m/s avg
Wind Speed: <4 m/s (not viable)
Note: Even in excellent zones, wind is typically viable only for 50kW+ commercial/utility projects. For homes, solar remains the better choice.
Installation Cost: ₹1,65,000 (post-₹54K subsidy)
Annual Generation: 4,380 units (~12 units/day)
Annual Savings: ₹35,040 (@ ₹8/unit)
Maintenance (20yr): ₹60,000
Payback Period: 4.7 years
20-Year Profit: ₹5,40,800
ROI: 327% over 20 years
Installation Cost: ₹2,50,000 (no subsidy)
Annual Generation: 2,190 units (~6 units/day avg)
Annual Savings: ₹17,520 (@ ₹8/unit)
Maintenance (20yr): ₹3,00,000
Payback Period: 14.3 years
20-Year Loss: ₹1,99,600
ROI: Negative in poor wind zones
Solar delivers 5X better ROI for residential installations!
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