Why Commercial Solar Makes Financial Sense in India (2026)
Commercial and industrial electricity consumers in India face the highest tariff slabs — often ₹8–₹12/unit compared to ₹4–₹7/unit for domestic users. This makes solar economics exceptionally strong for businesses. A 50kW commercial system at a company paying ₹9/unit saves approximately ₹1.8–₹2.0 lakh per month on electricity costs.
Benefit 1 — 40% Accelerated Depreciation (Income Tax)
Unlike residential customers, businesses can claim 40% accelerated depreciation on the solar plant value under the Income Tax Act 1961 (Plant & Machinery, Block 6, FY2025-26). For a ₹25 lakh solar installation (50kW system), this means:
- Year 1 depreciation: ₹10 lakh (40% of ₹25L)
- Tax saved (at 25% corporate rate): ₹2.5 lakh in Year 1 alone
Combined with energy savings, this dramatically accelerates payback to 2–4 years for commercial installations with strong tax positions.
See our Solar Depreciation Calculator and complete IT Act depreciation guide.
Benefit 2 — No Residential Subsidy Cap (CAPEX vs RESCO)
Commercial solar does not receive the PM Surya Ghar ₹78,000 cap — but it also has no cap on system size for CAPEX (self-ownership) models. Businesses can install 25kW, 100kW, or even 1MW systems under CAPEX model with full ownership and all financial benefits.
Alternatively, under the RESCO/OPEX model, a solar developer installs the system at zero CAPEX to the business — the business pays a per-unit solar tariff (typically ₹3–₹5/unit) vs. grid tariff (₹8–₹12/unit), saving the difference immediately with no upfront investment.
Benefit 3 — Lower Electricity Bills + Demand Charge Reduction
Commercial consumers pay both energy charges (per unit) and demand charges (per kVA of peak demand). Solar reduces peak daytime consumption, which can significantly reduce demand charges for factories and commercial establishments. This dual saving makes solar ROI for commercial users stronger than the simple unit-rate saving alone.
Benefit 4 — Net Metering and Banking
Commercial net metering allows surplus solar generation to be banked with the DISCOM and used later. Most states permit commercial net metering for systems up to 1MW rooftop capacity. The net metering export rate for commercial consumers is typically the DISCOM's average pooled cost of supply.
Benefit 5 — ESG and CSR Compliance
With India's Net Zero 2070 commitment and growing investor ESG scrutiny, commercial solar installations contribute to SEBI-mandated Business Responsibility and Sustainability Report (BRSR) disclosures. Companies with solar installations can report reduced Scope 2 emissions — increasingly important for export-oriented businesses, listed companies, and those in ESG-focused supply chains.
Types of Commercial Solar Systems
| System Type | Capacity Range | Best For | Payback |
|---|---|---|---|
| Rooftop CAPEX | 10kW–500kW | Offices, schools, hospitals | 3–5 years |
| Rooftop RESCO/OPEX | 25kW–1MW | Factories, large commercial | Zero CAPEX |
| Ground Mount | 100kW+ | Factories with land | 4–6 years |
| Carport Solar | 10kW–200kW | Large parking areas | 4–7 years |
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