120 kW Solar System: Price in India with Subsidy, Installation Cost, Specifications & More (2026 Guide)
Discover the latest 120 kW solar system price in India (2026), subsidy details, installation cost, specifications, electricity generation, ROI, payback period, roof space, and FAQs. A complete guide for commercial and industrial users.
120 kW Solar System Price in India (2026): Complete Guide
Electricity costs are one of the biggest expenses for businesses today. Whether you own a factory, hospital, hotel, warehouse, school, office building, or commercial complex, installing a 120 kW solar system can significantly reduce your electricity bills while providing clean and reliable energy for over 25 years.
A 120 kW solar power plant is a medium-to-large commercial solar solution designed for organizations with high daytime electricity consumption. It helps reduce dependence on the power grid, lowers operational costs, and supports environmental sustainability.
This guide covers everything you need to know about the 120 kW solar system price in India, subsidy, installation cost, specifications, electricity generation, benefits, ROI, and maintenance.
AI Overview (Quick Summary)
| Feature | Details |
|---|---|
| System Capacity | 120 kW |
| Best For | Factories, Hospitals, Hotels, Schools, Commercial Buildings |
| Estimated Price | ₹48 lakh – ₹66 lakh |
| Daily Electricity Generation | 450–600 Units |
| Monthly Generation | 13,500–18,000 Units |
| Annual Generation | 1.6–2.1 Lakh Units |
| Roof Area Required | 7,500–9,500 sq. ft. |
| Solar Panels Required | 190–220 Panels |
| Installation Time | 20–40 Days |
| Payback Period | 3–5 Years |
| System Life | 25+ Years |
What is a 120 kW Solar System?
A 120 kW solar system is a commercial rooftop or ground-mounted solar power plant capable of generating enough electricity to power large facilities with high energy demands.
It is commonly installed at:
- Manufacturing Units
- Industrial Plants
- Warehouses
- Hotels
- Hospitals
- Educational Institutions
- Office Buildings
- Shopping Complexes
- Cold Storage Facilities
- Government Buildings
120 kW Solar System Price in India (2026)
The total project cost depends on several factors, including:
- Solar panel brand
- TOPCon or Mono PERC technology
- Inverter quality
- Mounting structure
- Roof condition
- Electrical infrastructure
- Installation location
- Net metering requirements
Estimated Price (2026)
| System Type | Estimated Cost |
|---|---|
| On-Grid Solar System | ₹48 lakh – ₹56 lakh |
| Hybrid Solar System | ₹58 lakh – ₹66 lakh |
| Off-Grid Solar System | ₹72 lakh+ |
Note: Prices are indicative and may vary depending on component quality, project location, and engineering requirements.
Is There Any Subsidy for a 120 kW Solar System?
For commercial and industrial rooftop solar projects, there is generally no central subsidy under the PM Surya Ghar Muft Bijli Yojana, which is focused on residential consumers.
However, businesses may still benefit from:
- State government solar incentives (where applicable)
- Accelerated depreciation benefits (subject to tax rules)
- Net metering policies
- Renewable Energy Certificates (RECs) in eligible cases
Always check with your local DISCOM or state renewable energy agency for the latest policies.
120 kW Solar System Specifications
| Specification | Details |
|---|---|
| Capacity | 120 kW |
| Solar Panel Type | TOPCon / Mono PERC |
| Panel Wattage | 550W–625W |
| Number of Panels | 190–220 |
| Inverter Type | String Inverter |
| Mounting Structure | Hot Dip Galvanized Steel / Aluminium |
| Monitoring | Wi-Fi / Cloud Monitoring |
| Warranty | 25–30 Years on Solar Panels |
How Much Electricity Does a 120 kW Solar System Generate?
Electricity generation depends on:
- Location
- Sunlight hours
- Weather
- Panel efficiency
- Maintenance
Average Energy Generation
| Time | Electricity Output |
|---|---|
| Per Day | 450–600 Units |
| Per Month | 13,500–18,000 Units |
| Per Year | 1.6–2.1 Lakh Units |
Roof Space Required
A 120 kW rooftop solar system generally requires:
- 7,500–9,500 sq. ft. of shadow-free roof space.
Ground-mounted systems may require additional land depending on the project design.
Types of 120 kW Solar Systems
1. On-Grid Solar System
The most popular option for commercial users.
Benefits
- Lower installation cost
- Net metering support
- Maximum return on investment
- Low maintenance
2. Hybrid Solar System
Includes battery storage for backup power.
Suitable for:
- Hospitals
- Hotels
- Data Centres
- Critical Business Operations
Benefits
- Backup during power cuts
- Better energy management
3. Off-Grid Solar System
Ideal for remote locations with unreliable or no grid connection.
Benefits
- Complete energy independence
- Reliable power in remote areas
Components of a 120 kW Solar Plant
A complete solar system includes:
- High-Efficiency Solar Panels
- String Inverters
- Mounting Structure
- DC Distribution Box (DCDB)
- AC Distribution Box (ACDB)
- Earthing System
- Lightning Protection System
- Solar Cables
- Junction Boxes
- Online Monitoring System
Installation Process
Step 1
Energy consumption assessment
Step 2
Site inspection
Step 3
Customized system design
Step 4
Quotation and approval
Step 5
Material procurement
Step 6
Installation of solar panels and inverters
Step 7
Testing and commissioning
Step 8
Net metering approval (for on-grid systems)
Benefits of Installing a 120 kW Solar System
Lower Electricity Bills
Reduce electricity expenses by up to 80–95%, depending on energy usage.
Excellent Return on Investment
Most businesses recover their investment within 3–5 years.
Long Service Life
Solar panels are designed to perform efficiently for 25 years or more.
Environment-Friendly
Reduce carbon emissions and contribute to a cleaner environment.
Low Maintenance
Routine cleaning and periodic inspections help maintain optimal performance.
Increased Business Value
Solar installations improve sustainability credentials and can enhance property value.
Maintenance Tips
- Clean panels every 15–30 days.
- Monitor daily energy production.
- Check wiring and electrical connections regularly.
- Inspect mounting structures annually.
- Schedule preventive maintenance once a year.
- Replace faulty components promptly.
Who Should Install a 120 kW Solar System?
This system is ideal for:
- Manufacturing Industries
- Pharmaceutical Companies
- Hotels
- Hospitals
- Educational Institutions
- Shopping Malls
- Warehouses
- Cold Storage Facilities
- Commercial Buildings
- Government Offices
ROI Example
Example:
- Annual electricity generation: 1.9 lakh units
- Electricity tariff: ₹8 per unit
Annual Savings = 1,90,000 × ₹8 = ₹15.2 lakh
Actual savings depend on electricity tariffs, system performance, and energy consumption patterns.
Why Choose Bhandari Solar?
Bhandari Solar provides complete commercial solar solutions, including:
- Free Site Survey
- Custom Solar Design
- Premium Tier-1 Solar Panels
- High-Efficiency Inverters
- Professional Installation
- Net Metering Assistance
- Annual Maintenance Services (AMC)
- Dedicated After-Sales Support
Conclusion
A 120 kW solar system is an excellent investment for businesses looking to reduce electricity costs, improve energy efficiency, and support sustainability goals. With a lifespan of more than 25 years and a typical payback period of 3–5 years, it offers long-term financial and environmental benefits. Choosing quality components and an experienced installer ensures reliable performance and maximum return on investment.
FAQs
What is the price of a 120 kW solar system in India?
A 120 kW solar system typically costs between ₹48 lakh and ₹66 lakh, depending on the system type, component quality, and installation requirements.
How many solar panels are needed for a 120 kW system?
A 120 kW system generally requires 190–220 solar panels, depending on the wattage of each panel.
How much electricity does a 120 kW solar system generate per day?
It generates approximately 450–600 units of electricity per day, depending on location and weather conditions.
Is there a government subsidy for a 120 kW solar system?
Commercial and industrial solar systems are generally not eligible for the central residential subsidy. However, some state-level incentives or tax benefits may be available.
What is the payback period for a 120 kW solar plant?
The average payback period is 3–5 years, depending on electricity tariffs and system utilization.
How much roof space is required for a 120 kW solar system?
A shadow-free rooftop area of approximately 7,500–9,500 sq. ft. is recommended.
Which businesses should install a 120 kW solar system?
It is ideal for factories, hospitals, hotels, schools, warehouses, shopping malls, office buildings, and other commercial establishments with high electricity consumption.
What is the lifespan of a 120 kW solar system?
A high-quality solar system can operate efficiently for 25 years or more with proper maintenance.