6kW Solar System Price in India Guide: The demand for solar power in India is growing at a record pace, and for larger households or small businesses, a 6kW solar system is often the sweet spot. It generates enough power to run multiple appliances, including air conditioners, refrigerators, washing machines, and even small commercial setups, while keeping electricity bills near zero.
In this article, we’ll break down the price of a 6kW solar system in India (2025), explore available government subsidies, calculate ROI, and share real-life case studies to show how families and businesses benefit from going solar.
6kW Solar System Price in India (2025)
The cost of a 6kW solar system varies depending on whether it’s on-grid, hybrid, or off-grid.
- On-Grid (Net Metering): ₹3,90,000 – ₹4,50,000
- Hybrid (Partial Battery Backup): ₹4,80,000 – ₹5,50,000
- Off-Grid (Full Battery): ₹5,60,000 – ₹6,40,000
What’s included in the cost?
- 15–16 solar panels (370W–450W each)
- Inverter (on-grid/hybrid/off-grid type)
- Mounting structures, wiring, BOS (Balance of System)
- Battery (for hybrid/off-grid setups)
- Installation and labor
Power Generation from 6kW Solar
- Daily output: 24–26 units
- Monthly output: 720–780 units
- Annual output: 8,600–9,400 units
A 6kW system can cover the needs of a large household with 2–3 ACs, kitchen appliances, and heavy loads OR a small business such as a shop, clinic, or office.
On-Grid vs Off-Grid vs Hybrid 6kW Solar System
| Feature | On-Grid 6kW | Off-Grid 6kW | Hybrid 6kW |
|---|---|---|---|
| Connection | Linked to electricity grid (net metering) | Works independently with battery storage | Grid-connected + battery backup |
| Cost (Before Subsidy) | ₹3.9 – ₹4.5 lakh | ₹5.6 – ₹6.4 lakh | ₹4.8 – ₹5.5 lakh |
| Cost (After Subsidy) | ₹2.7 – ₹3.0 lakh | ❌ Not eligible | ₹3.4 – ₹4.1 lakh |
| Subsidy Eligible? | ✅ Yes (residential) | ❌ No | ✅ Yes (residential, on-grid portion) |
| Power During Outages | ❌ No (unless batteries added) | ✅ Yes | ✅ Yes |
| Maintenance | Low | Medium–High (battery care) | Medium |
| Ideal For | Homes & businesses with stable grid | Remote/rural areas with no grid | Cities with frequent power cuts |
| Payback Period | 4–5 years | 6–7 years | 5–6 years |
| Lifespan | 25 years (panels), 7–10 years (inverter) | 25 years (panels), 5–7 years (batteries) | Same as above |
Quick Decision:
- On-Grid 6kW: Best ROI, lower cost, ideal for cities.
- Off-Grid 6kW: For remote areas with no grid.
- Hybrid 6kW: Balanced option for urban areas with power cuts.
6kW Solar System – Cost & Savings
| Category | On-Grid 6kW | Off-Grid 6kW | Hybrid 6kW |
|---|---|---|---|
| System Cost (Before Subsidy) | ₹3,90,000 – ₹4,50,000 | ₹5,60,000 – ₹6,40,000 | ₹4,80,000 – ₹5,50,000 |
| Subsidy (Residential) | ₹1,44,000 | ❌ Not Eligible | ₹1,44,000 (on-grid portion) |
| Net Cost (After Subsidy) | ₹2,70,000 – ₹3,00,000 | ₹5,60,000 – ₹6,40,000 | ₹3,40,000 – ₹4,10,000 |
| Monthly Generation | 720–780 units | 720–780 units | 720–780 units |
| Average Bill Savings / Month | ₹6,000–₹6,500 | ₹6,000–₹6,500 | ₹6,000–₹6,500 |
| Annual Savings | ₹70,000–₹75,000 | ₹70,000–₹75,000 | ₹70,000–₹75,000 |
| Payback Period | 4–5 years | 6–7 years | 5–6 years |
| Lifetime Savings (25 years) | ₹12–15 lakh | ₹8–10 lakh | ₹10–12 lakh |
Government Subsidy on 6kW Solar System (2025)
The PM Surya Ghar: Muft Bijli Yojana, households get a 60% subsidy for solar systems up to 3kW capacity. Under India’s Rooftop Solar Programme Phase II, subsidies apply to residential rooftop systems up to 10kW:
- Up to 3kW: ₹30,000 per kW
- Beyond 3kW to 10kW: ₹18,000 per kW
For a 6kW solar system:
- Subsidy = (3 × ₹30,000) + (3 × ₹18,000)
- Subsidy = ₹90,000 + ₹54,000 = ₹1,44,000
If your system costs ₹4,20,000, after subsidy you pay only ₹2,76,000.
How to Apply for Subsidy
The process is simple:
- Visit the National Portal for Rooftop Solar → solarrooftop.gov.in.
- Register with your state DISCOM (electricity board).
- Choose an empaneled vendor for installation.
- After installation, the DISCOM will inspect the setup.
- Once approved, the subsidy is directly credited to your bank account.
ROI Example – 6kW Solar System
Let’s calculate payback for a typical Indian home:
- System Cost (after subsidy): ₹2,76,000
- Annual Generation: 9,000 units
- Average Tariff: ₹8/unit
- Annual Savings: ₹72,000
- Payback Period: ₹2,76,000 ÷ ₹72,000 ≈ 3.8 years
Since solar panels last 25 years, that’s 21+ years of free electricity.
Lifetime savings: ₹12–15 lakh
Real-Life Case Studies
Case Study 1 – Delhi Family
- System: 6kW On-Grid
- Cost: ₹4,10,000
- Subsidy Received: ₹1,44,000
- Net Cost: ₹2,66,000
- Monthly Bill Savings: ₹6,000–₹6,500
- Payback: 4 years
They run three ACs, a double-door fridge, and multiple appliances with almost zero electricity bills.
Case Study 2 – Coimbatore Business Owner
- System: 6kW Hybrid (with 10kWh battery backup)
- Cost: ₹5,20,000
- Subsidy: ₹1,44,000
- Net Cost: ₹3,76,000
- Annual Savings: ₹70,000
- Extra Benefit: Reliable power during frequent outages, ensuring smooth business operations.
On-Grid vs Hybrid vs Off-Grid – Which to Choose?
- On-Grid: Best ROI, net metering reduces bills to almost zero.
- Hybrid: Slightly higher cost but ensures backup during power cuts.
- Off-Grid: Expensive, suited for remote areas without grid connectivity.
For most homes, on-grid is the most cost-effective choice.
Environmental Benefits
- A 6kW system reduces 7.5 tons of CO₂ emissions annually, equivalent to planting 300 trees per year.
- Over 25 years, that’s a 187-ton carbon reduction.
FAQs about 6kW Solar System Price in India
How many panels are required for 6kW solar?
Around 15–16 panels of 370W–450W each.
How much space is needed for 6kW solar?
500–600 sq. ft. of shadow-free rooftop.
Can a 6kW system run 3 ACs?
Yes, along with lights, fans, fridge, washing machine, and other appliances.
How long does a 6kW solar system last?
Panels last 25 years, inverters 7–10 years, batteries (if used) 5–7 years.
Is subsidy available for commercial setups?
No, subsidies are only for residential rooftop solar systems.
Conclusion
A 6kW solar system in India is ideal for large families or small businesses with heavy electricity usage. With subsidies, the net cost drops below ₹3 lakh, and the payback period is just 4 years. After that, you’ll enjoy over two decades of free, clean electricity while reducing your carbon footprint.
If you want to eliminate high electricity bills and achieve energy independence, a 6kW rooftop solar system is a smart investment in 2025.
