100kW to 500kW Solar System with Subsidy Benefits: Step-by-Step Complete Guide

With rising electricity costs and increasing energy demand, large-scale solar installations are becoming the preferred choice for factories, warehouses, hospitals, schools, malls, hotels, and commercial buildings. A 100kW to 500kW solar system helps organizations significantly reduce operational electricity expenses and achieve long-term energy independence. Along with net metering and tax benefits, government subsidy support up to ₹78,000 (as per applicable schemes) further improves project feasibility.

What Is a 100kW to 500kW Solar System?

A 100kW to 500kW solar system is a high-capacity rooftop or ground-mounted solar power plant designed for commercial and industrial use.

Approximate daily power generation:

• 100kW system: 400–450 units/day

• 200kW system: 800–900 units/day

• 500kW system: 2,000–2,250 units/day

These systems are ideal for facilities with heavy machinery, HVAC systems, large lighting loads, and continuous power consumption.

Benefits of Large-Scale Solar Systems

• Reduces electricity bills by up to 70–90%

• Clean, renewable, and sustainable energy

• Very low maintenance cost

• Solar panels have a lifespan of 25+ years

• Net metering allows export of excess power

• Protection against rising electricity tariffs

Cost of 100kW to 500kW Solar Systems

The approximate cost varies based on capacity, location, and equipment quality:

• 100kW: ₹45–55 lakh

• 250kW: ₹1.1–1.3 crore

• 500kW: ₹2.2–2.6 crore

This cost includes solar panels, inverters, mounting structures, wiring, safety equipment, monitoring systems, and installation.

Government Subsidy up to ₹78,000 (Applicable Cases)

Under government rooftop solar schemes, subsidy support up to ₹78,000 is available where applicable, mainly for residential or special-category connections.
For large commercial and industrial systems, financial benefits are usually provided through:

• Net metering savings

• Accelerated depreciation

• Tax benefits and reduced electricity tariffs

Subsidy or incentive details depend on state DISCOM policies and consumer category.

Step-by-Step Process to Install a 100kW–500kW Solar System

Step 1: Site & Load Assessment

• Roof or land availability analysis

• Shadow analysis and structural safety check

• Electricity load and consumption study

Step 2: System Design & Proposal

• Customized system size selection

• Generation estimate and ROI calculation

• Financial and technical proposal

Step 3: DISCOM Approval & Documentation

• Apply for grid connectivity

• Submit drawings and technical documents

• Obtain feasibility approval

Step 4: Installation & Commissioning

• Mounting structure installation

• Solar panel and inverter setup

• Electrical wiring, earthing, and safety checks

Step 5: Inspection & Net Metering

• DISCOM inspection

• Net meter installation and synchronization

Step 6: Subsidy / Benefit Processing

• Upload completion documents

• Subsidy (if applicable) credited to bank account

• System monitoring starts

Savings & Payback Period

A 100kW–500kW solar system can reduce monthly electricity bills by ₹3 lakh to ₹15 lakh, depending on usage. The average payback period is 3 to 5 years, while the system continues generating free power for over 25 years.

Conclusion

Installing a 100kW to 500kW solar system is a powerful investment for businesses and institutions. With long-term savings, energy security, and available government benefits (including up to ₹78,000 subsidy where applicable), solar power delivers unmatched financial and environmental returns.

Switch to large-scale solar today and future-proof your energy costs