On-Grid vs Off-Grid Solar
A 3kW on-grid system costs just ₹72,000 after subsidy, while an off-grid system with battery costs ₹2,80,000–3,50,000. Find which system is right for your home.
What is the difference between on-grid and off-grid solar?
On-grid (grid-tied) solar connects to the electricity grid and uses net metering to export excess power — it costs ₹72,000 for a 3kW system after PM Surya Ghar subsidy (up to ₹1,08,000). Off-grid solar is independent with battery storage, costing ₹2,80,000–3,50,000 for 3kW but providing power during outages. For most homes in UP with reliable grid, on-grid is the better investment. Choose off-grid only if you face frequent, extended power cuts (4+ hours daily).
Source: BL Solar Solutions comparison analysis | Last updated: September 2026
Cost Difference
₹2,08,000+
On-grid is cheaper (3kW)
Subsidy
Up to ₹1,08,000
Only on-grid eligible
Battery
Not Required
On-grid: no battery needed
ROI Period
2.5–3 years
On-grid vs 6–8 years off-grid
Feature-by-Feature Comparison
| Feature | On-Grid Solar | Off-Grid Solar |
|---|---|---|
| Upfront Cost (3kW) | ₹72,000 (after subsidy) | ₹2,80,000–3,50,000 |
| PM Surya Ghar Subsidy | Up to ₹78,000 + ₹30,000 state | Not eligible |
| Net Metering | Yes — sell excess to grid | No — self-consumption only |
| Battery Required | No battery needed | Yes — adds ₹80,000–1,50,000 |
| Monthly Maintenance | ₹200–500 (panel cleaning) | ₹500–1,500 (battery + panels) |
| ROI Period | 2.5–3 years | 6–8 years |
| Scalability | Easy — add panels anytime | Complex — battery sizing matters |
| Works During Power Cuts | No — shuts down for safety | Yes — battery provides backup |
| Best For | Areas with reliable grid supply | Areas with frequent power cuts |
| Lifespan | 25+ years (panels) | 25+ years (panels) + 5–10 years (battery) |
Long-term Cost Analysis (3kW System)
Total cost of ownership including purchase, battery replacement, and maintenance
On-Grid (Total Cost)
₹82,000
₹1,367/month avg.
Off-Grid (Total Cost)
₹3,20,000
₹5,333/month avg.
₹2,38,000 saved with on-grid
On-Grid (Total Cost)
₹92,000
₹767/month avg.
Off-Grid (Total Cost)
₹4,50,000
₹3,750/month avg.
₹3,58,000 saved with on-grid
On-Grid (Total Cost)
₹1,22,000
₹407/month avg.
Off-Grid (Total Cost)
₹7,50,000+
₹2,500+/month avg.
₹6,28,000+ saved with on-grid
* On-grid cost includes system purchase (after subsidy) + 25 years maintenance. Off-grid cost includes system + battery + battery replacement (every 5–10 years for lead-acid) + maintenance. Battery cost varies by type (lead-acid vs lithium).
Which Should You Choose?
- You have reliable grid supply (power cuts < 2 hours/day)
- You want the lowest cost and fastest ROI
- You want PM Surya Ghar subsidy (up to ₹1,08,000)
- You want to earn credits via net metering
- You live in Lucknow, Kanpur, or other major UP cities
- You want minimal maintenance (no batteries)
- You want to start small and expand later
- You face frequent power cuts (4+ hours daily)
- You need 24/7 uninterrupted power supply
- You live in a rural area with no grid connection
- Your property is a farmhouse or remote site
- You need power for critical equipment (medical, telecom)
- You are willing to invest more for energy independence
- You do not mind higher maintenance (battery upkeep)
Consider a Hybrid System
A hybrid solar system gives you the best of both worlds: it connects to the grid for net metering benefits and includes battery backup for power cuts. During normal operation, excess power is exported to the grid. During outages, the battery kicks in automatically.
Net Metering
Earn credits on grid
Battery Backup
Power during outages
Best of Both
Flexibility + savings
Hybrid system cost: ₹1,50,000–2,50,000 for a 3kW system with 5kWh battery (after subsidy). You can also start with on-grid and upgrade to hybrid later by adding a battery and hybrid inverter.
Official Resources
- PM Surya Ghar Portal — Apply for solar subsidy (up to ₹78,000 central + ₹30,000 UP state)
- MNRE — Ministry of New and Renewable Energy guidelines
- UPNEDA — UP New and Renewable Energy Development Agency
On-Grid vs Off-Grid Solar FAQs
Common questions about choosing between on-grid and off-grid solar systems
On-grid (grid-tied) solar is connected to the electricity grid and uses net metering to export excess power. Off-grid solar is independent with battery storage for backup. On-grid is cheaper (no battery cost) and eligible for PM Surya Ghar subsidy, while off-grid provides power during grid outages.
On-grid is significantly cheaper. A 3kW on-grid system costs ₹72,000 after subsidy, while a 3kW off-grid system with battery costs ₹2,80,000–3,50,000. On-grid systems also qualify for PM Surya Ghar subsidy (up to ₹1,08,000), while off-grid systems do not.
No. On-grid solar systems shut down during power cuts for safety (anti-islanding protection). This prevents feeding electricity into the grid while linesmen are working. For backup during outages, you need a hybrid system with battery or a pure off-grid setup.
Off-grid solar is worth it only if you experience frequent, long power cuts (4+ hours daily) and need uninterrupted power. For most areas in Lucknow, Kanpur, and major UP cities with relatively stable grid, on-grid is the better investment due to lower cost and subsidy benefits.
Yes, you can upgrade an on-grid system to a hybrid system by adding a battery bank and a hybrid inverter. This gives you both net metering benefits and battery backup. The upgrade typically costs ₹80,000–1,50,000 depending on battery capacity.
A hybrid solar system combines the benefits of both: it connects to the grid (net metering) and has battery backup. During power cuts, the battery powers your home. During normal times, excess power goes to the grid. It is more expensive but offers the best of both worlds.
Only on-grid (grid-connected) solar systems qualify for PM Surya Ghar subsidy. The system must be connected to the grid with a net meter installed by your local DISCOM (LESA, KESCO, DVVNL, or MVVNL in UP). Off-grid and standalone systems are not eligible.
For a 3kW off-grid system powering essential loads (lights, fans, fridge, TV) for 6–8 hours backup, you need approximately 150Ah × 4 batteries (tubular lead-acid) or a 5kWh lithium battery pack. Battery cost: ₹40,000–80,000 for lead-acid, ₹80,000–1,50,000 for lithium.
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