Why Commercial Rooftop Solar Is the Smartest Energy Move for Indian Businesses in 2025
Apr 21
We’re here to help from site visit to commissioning – GSE renewables handles it all.
| Model | 100kW Solar Price |
| 100kW On-grid solar system | Rs. 35,00,000 |
| 100kW Off-grid solar system | Rs. 40,00,000 |
| 100kW Hybrid solar system | Rs. 50,00,000 |
| Key Components | Details |
| Key components | Solar panels, solar mounting structure, solar inverter, solar batteries (optional), the balance of system (cables, fuses, MCBs, and Distribution boxes) |
| Energy output | 430 to 480 kWh of electricity per day | 14,400 kWh per month | 1,72,800 kWh per year |
| Area required | A shade-free space of approximately 600 Sq. Mtr. is needed to install a 100kW solar system. |
| Sr.No. | Solar System Details | Price (in Rs.) |
| 1 | Solar Panels (Shark 540 x 200) | Rs. 50,00,000 |
| 2 | Inverter (50kW x 2) | Rs. 4,40,000 |
| 3 | Panel Stand (High Rise Panel Stand) | Rs. 4,00,000 |
| 4 | Wire (DC & AC Wire) | Rs. 90,000 |
| 5 | DCDB & ACDB | Rs. 50,000 |
| 6 | Lighting Arrester & Earthing Kit (3) | Rs. 40,000 |
| 7 | Installation Cost (Rs. 3 per watt) | Rs. 3,00,000 |
| 8 | Net Metering | Rs. 50,000 |
| 9 | Annual Maintenance Cost (1% to 2%) | Rs. 11,25,000 |
| Rooftop Solar System Capacity | Applicable Subsidy (Rs.) |
| Up to 3 kW | 14,588/kW |
| Above 3 kW and up to 10 kW | 7,294/kW* |
| Above 10 kW | 94,822** |
| * Rs.14,588/kW for the first 3 kW and Rs.7,294/kW for the rest of the capacity up to 10 kW. ** The subsidy amount is fixed for rooftop solar systems above 10 kW capacity. | |
| System | Benchmark Cost (Rs./W) |
| 1 kW | Rs. 51.10 |
| Above 1 kW to 2 kW | Rs. 46.98 |
| Above 2 kW to 3 kW | Rs. 45.76 |
| Above 3 kW to 10 kW | Rs. 44.64 |
| Above 10 kW and up to 100 kW | Rs. 41.64 |
| Above 100 kW and up to 500 kW | Rs. 39.08 |
Get a free quote from GSE Renewables. Connect with our solar experts or reach out directly to get started.
| Parameter | CAPEX (Own the System) | OPEX / RESCO (Buy Solar Power) |
| Upfront Investment | Rs. 35 lakhs to Rs. 55 lakhs | Zero (developer funds the plant) |
| Ownership | Yours from Day 1 | Developer owns the plant for PPA tenure (typically 10 to 25 years) |
| Estimated Monthly Generation | 12,000 to 15,000 kWh | 12,000 to 15,000 kWh |
| Monthly Savings vs Grid | Rs. 96,000 to Rs. 1,20,000 | Rs. 40,000 to Rs. 80,000 (savings = grid tariff minus PPA rate) |
| Payback Period | 4 to 7 years | Not applicable (no investment to recover) |
| Rooftop Area Required | 600 to 700 sq. mt. | 600 to 700 sq. mt. |
| Tax Benefit (Accelerated Depreciation) | Yes, 40% AD benefit available | Not applicable |
| Who It Suits Best | Factories, hospitals, institutions with capital and a long-term ownership mindset | Businesses looking for immediate savings without capital expenditure commitment |
For a 100kW commercial solar system in India, the following approvals are typically required:
GSE Renewables manages the entire approval process on behalf of clients. Visit our Industrial Rooftop Solar page to understand what our end-to-end project execution covers.
A 100kW rooftop solar installation requires a minimum of 600 sq. mt. of unshaded, structurally sound rooftop or open land. Key factors that determine suitability include:
If you are unsure about your rooftop, request a free site visit from GSE Renewables. Our engineers will assess shadow patterns using solar path software and deliver a detailed generation report before any commitment.
The payback period for a 100kW solar system cost in India depends on several factors: your current electricity tariff, the quality of solar components selected, shadow-free rooftop availability, and local irradiation levels. As a broad reference:
Post payback, the system continues to generate free electricity for 20 to 25 years, translating into a significant long-term return.
Whether a 100kW solar for factory can meet 100% of energy needs depends on the factory’s operating hours and load profile. For factories that operate primarily between 8 AM and 6 PM, a well-positioned 100kW on-grid system can offset 50% to 80% of the total electricity bill. Factories running night shifts or heavy loads above 200 kVA would benefit from a larger capacity or a hybrid approach combining solar with grid and battery backup.
GSE Renewables has deployed over 30 MW of commercial and industrial solar projects across India. Whether you are evaluating a 100kW solar system for your factory, hospital, institution, or rice mill, our team provides site visit, system design, and end-to-end project commissioning at no obligation.
Our Blogs With a combined experience of over 250 years and the successful management of 30 MW of solar energy projects, GSER offers the most efficient solutions. Why Commercial Rooftop Solar Is the Smartest Energy Move for Indian Businesses in 2025 Talk To Us –...
Read MoreOur Blogs With a combined experience of over 250 years and the successful management of 30 MW of solar energy projects, GSER offers the most efficient solutions. Commercial Solar Installation Cost in India (2026): 50kW to 1MW Pricing, ROI and CAPEX vs OPEX Talk To...
Read MoreOur Blogs With a combined experience of over 250 years and the successful management of 30 MW of solar energy projects, GSER offers the most efficient solutions. Top 10 Best Solar Companies in India for 2026 India is targeting 280 GW of solar capacity by...
Read More