Commercial Solar Panels in India: Guide for Businesses and Industries
The Short Answer
Commercial solar panel systems in India range from 10kW to 1MW+, cost ₹40–₹55 per watt installed (lower per-watt than residential), and deliver ROI of 20–35% annually. Businesses typically recover their investment in 3–5 years thanks to higher commercial electricity tariffs (₹8–₹14/unit). No residential subsidy applies, but accelerated depreciation (40%) and tax benefits make the economics compelling.
Why Commercial Solar Makes Financial Sense
Best Panel Types for Commercial Installations
Commercial System Sizing
Commercial Solar Pricing and Costs
Tax Benefits and Financial Incentives
While PM Surya Ghar subsidy is for residential only, commercial solar has its own financial incentives:
- Accelerated depreciation (40%): Businesses can depreciate 40% of the solar system cost in year 1 under the Income Tax Act. For a ₹50L system in the 30% tax bracket, this saves ₹6L in taxes in the first year alone.
- GST input credit: The 13.8% GST paid on the solar system is available as input tax credit for GST-registered businesses, effectively reducing the net cost.
- Net metering credits: Available in all states. Commercial tariffs are higher, so net metering credits are more valuable per unit.
- Carbon credits: Large installations (100kW+) can generate carbon credits under voluntary carbon markets, providing an additional revenue stream.
- Green building certification: Solar installation contributes to IGBC/GRIHA green building ratings, which can increase commercial property value and rental premiums.
OPEX vs CAPEX Models
Commercial solar offers two ownership models:
CAPEX (you own the system):
- You pay the full upfront cost and own the system
- Higher long-term savings — you keep all the electricity generated
- Benefit from accelerated depreciation and GST input credit
- Responsible for maintenance (or purchase an AMC)
- Best for: Businesses with capital available, tax-paying entities that benefit from depreciation
OPEX / PPA (developer owns, you buy power):
- A solar developer installs and owns the system on your roof
- You sign a Power Purchase Agreement (PPA) to buy solar power at a fixed rate (₹3–₹5/unit), lower than your grid tariff
- Zero upfront investment. Developer handles all maintenance
- PPA tenure: 15–25 years. Rates may escalate 1–3% annually
- Best for: Businesses that want savings without capital outlay or maintenance responsibility
Many mid-sized businesses start with OPEX/PPA and switch to CAPEX ownership when the PPA term ends or when they have capital to invest.
Choosing an Installer for Commercial Projects
Commercial installations are more complex than residential. Look for installers with:
- Commercial portfolio: Past installations of similar scale in your region
- EPC capability: End-to-end engineering, procurement, and construction expertise
- DISCOM experience: Familiarity with commercial net metering process and HT/LT connection requirements
- AMC and monitoring: Remote monitoring systems and annual maintenance contracts for commercial-scale systems
- Financial structuring: Ability to offer CAPEX, OPEX/PPA, and hybrid financing models
Solar Vipani connects businesses with verified EPC contractors experienced in commercial-scale installations across India.
Common questions
How much does commercial solar cost in India?
Commercial solar costs ₹35–₹55 per watt installed, depending on system size. A 50kW system costs ₹21L–₹25L. A 200kW system costs ₹76L–₹92L. Larger systems get lower per-watt pricing due to economies of scale. These are pre-tax figures — GST input credit and accelerated depreciation further reduce effective cost.
What is the ROI on commercial solar in India?
Commercial solar delivers 20–35% annual ROI thanks to high commercial tariffs (₹8–₹14/unit). Most businesses recover their investment in 3–5 years. After payback, electricity savings flow directly to the bottom line for the remaining 20+ years of system life. Accelerated depreciation (40% in year 1) improves the financial return further.
Do businesses get solar subsidies in India?
PM Surya Ghar subsidy is for residential consumers only. However, businesses benefit from accelerated depreciation (40% in year 1) under Income Tax Act, GST input credit on the system cost, and net metering credits at high commercial tariff rates. These incentives often exceed the residential subsidy in financial value.
What is the difference between CAPEX and OPEX solar models?
In CAPEX, you pay upfront and own the system — higher long-term savings plus tax benefits from depreciation. In OPEX (PPA model), a developer installs and owns the system on your roof, and you buy power at a fixed rate (₹3–₹5/unit) — zero upfront cost but lower lifetime savings. CAPEX suits capital-rich businesses; OPEX suits those wanting savings without investment.
Which solar panels are best for commercial installations?
Mono PERC (540W+) panels offer the best value for most commercial rooftops. Bifacial panels are worth the premium for elevated mounts and carports where rear-side generation adds 10–25% extra output. Polycrystalline remains viable for massive warehouse roofs where space is unlimited and per-watt cost is the priority.
How much roof space does a 100kW commercial solar system need?
A 100kW system with monocrystalline panels needs approximately 6,500–7,500 sq ft of shadow-free roof area. Polycrystalline panels need 9,000–10,000 sq ft for the same capacity. Flat commercial roofs require tilted mounting, which adds spacing between rows — factor 1.3× the panel area for total roof footprint.
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