What is an Off-Grid Solar System?
An off-grid solar system is a standalone power setup that operates completely independently from the traditional electric grid. Unlike on-grid systems, it uses batteries to store energy generated during sunshine hours for use at night or during cloudy periods, ensuring 24/7 power availability.
When to Use Off-Grid Solar?
- check_circleYou live in a remote area with no utility grid connection
- check_circleYour area faces extreme and frequent power cuts
- check_circleThe grid is unreliable or too expensive to connect
- check_circleFarmhouses, cabins, or rural industrial setups
Important to Know
Not for Most Urban Homes: If you have reliable grid connection, on-grid solar is more cost-effective, requires less maintenance, and offers government subsidies.
No Government Subsidy: Off-grid systems are not eligible for subsidies under PM Surya Ghar Muft Bijli Yojana.
Higher Initial Cost: Due to battery requirements, off-grid systems cost more upfront than on-grid alternatives.
Core System Components
Every SolarForce off-grid system is engineered with premium components designed for longevity and efficiency.
Solar PV Panels
High-efficiency Monocrystalline PERC panels designed to maximize energy capture even in low-light conditions.
Battery Bank
Deep-cycle Tall Tubular or Lithium-Ion batteries. Stores surplus energy during the day for night-time usage.
Off-Grid Inverter
Pure Sine Wave inverters that convert DC current to AC, ensuring safe power for sensitive electronics.
Mounting Structure
Hot-dipped galvanized iron structures designed to withstand high wind speeds and corrosion.
How It Works
From sunrise to flipping the switch, here is the journey of your power.
1. Absorption
Solar panels absorb sunlight and convert it into DC electricity.
2. Regulation
Charge controller regulates voltage to safely charge batteries.
3. Storage
Energy is stored in the battery bank for later use.
4. Conversion
Inverter converts DC from batteries to AC for your home.
5. Delivery
Clean power runs your appliances, day or night.
Off-Grid Solar System Pricing
Estimated pricing based on system capacity (market estimates)
| Capacity | Price Range | Batteries Needed | Typical Load |
|---|---|---|---|
| 1 kW | ₹85,000 - ₹1,00,000 | 1 battery | Lights, Fans, TV |
| 2 kW | ₹1,30,000 - ₹1,60,000 | 1 battery | Above + Fridge, Mixer |
| 3 kW | ₹1,80,000 - ₹2,00,000 | 2-4 batteries (100AH) | Above + Washing Machine |
| 4 kW | ₹2,20,000 - ₹2,60,000 | 3-6 batteries | Full Home Appliances |
| 5 kW | ₹2,95,000 - ₹3,20,000 | 4-8 batteries (500AH) | Above + 1HP AC |
On-Grid vs Off-Grid: Which is Better?
For most urban homes with reliable grid access, on-grid solar is the better choice. Here's why:
Lower Cost
On-grid systems cost significantly less as they don't require expensive battery banks.
Example: 3kW on-grid ₹1.02L-₹1.57L (after subsidy) vs 3kW off-grid ₹2.55L-₹3L
Government Subsidy
Eligible for ₹30,000-₹78,000 subsidy under PM Surya Ghar Muft Bijli Yojana.
Off-grid systems don't qualify for any government subsidies.
Less Maintenance
No batteries means minimal maintenance - just occasional panel cleaning.
Off-grid requires battery maintenance and replacement every 5-7 years.
Faster ROI
On-grid systems typically break even in 3-4 years vs 6-7 years for off-grid.
Lower upfront cost and subsidies accelerate return on investment.
Earn Credits
Excess power fed to grid earns you credits, reducing future electricity bills.
Off-grid can only store excess in batteries (limited capacity).
Better for Environment
No battery manufacturing/disposal means smaller environmental footprint.
Lead-acid batteries require careful disposal and recycling.
When Off-Grid Makes Sense:
- • No grid connection available in your area
- • Extremely frequent and long power cuts (grid unreliable)
- • Grid connection cost is prohibitively expensive
- • Remote farmhouse, cabin, or rural industrial setup
Frequently Asked Questions
Common questions about off-grid solar systems
How much does an off-grid solar system cost?expand_more
Off-grid solar system costs vary based on capacity, panel type, inverter quality, and battery type. Roughly: 2kW (₹1.7L - ₹2L), 3kW (₹2.55L - ₹3L), 5kW (₹4.25L - ₹5L).
What is the disadvantage of off-grid solar?expand_more
The main disadvantage is longer ROI (6-7 years vs 3-4 years for on-grid) due to higher upfront costs from batteries. Other considerations include battery replacement every 5-7 years, higher maintenance, and no government subsidies available.
Is there a subsidy for off-grid solar systems?expand_more
No. The Indian government currently offers subsidies only for on-grid rooftop solar systems under the PM Surya Ghar Muft Bijli Yojana, not for off-grid systems.
How many batteries are required for off-grid solar systems?expand_more
Battery requirements depend on system size and your backup needs. Typically: 3kW system requires 8-9 batteries (100 AH), 5kW system requires 10-11 batteries (500 AH). Lithium-ion batteries require fewer units but cost more.
How long do off-grid solar batteries last?expand_more
Lead-acid batteries typically last 5-7 years with proper maintenance. Lithium-ion batteries can last 10-15 years but cost significantly more upfront.
Ready to Explore Solar Solutions?
While we don't install off-grid systems, we're experts in on-grid and hybrid solutions. Get a free consultation to find the best solar setup for your needs.