# Commercial Solar for Businesses in India — ROI, Tax Benefits and Process **Last Updated:** February 20, 2026 For Indian businesses, commercial rooftop solar isn't just about sustainability — it's a compelling financial decision. With electricity costs eating 5–15% of revenue for many manufacturers and commercial establishments, solar can deliver 25–40% reduction in power costs from day one. This guide covers everything a business owner or CFO needs to know before investing in commercial solar. --- ## Why Commercial Solar Makes Financial Sense Right Now ### Key Drivers in 2025: 1. **Rising grid electricity costs** — commercial tariffs in most states have increased 8–12% annually 2. **Solar costs at historic lows** — ₹45–₹55 per watt for commercial installations 3. **Generous tax benefits** — 40% accelerated depreciation in year one 4. **Favorable net metering** — sell excess back to grid at good rates 5. **Fast payback** — typically 3–5 years for commercial installations --- ## Commercial Solar System Sizing Unlike residential, commercial sizing is based on: - **Sanctioned load** from your electricity connection - **Available rooftop area** (80–90% utilization possible) - **Monthly consumption** patterns (day vs night usage) ### Quick Sizing Guide for Commercial Properties: | Rooftop Area | System Size | Monthly Generation | Monthly Savings (approx) | |-------------|------------|-------------------|--------------------------| | 2,000 sq ft | 20 kW | 2,400 units | ₹24,000–₹40,000 | | 5,000 sq ft | 50 kW | 6,000 units | ₹60,000–₹1,00,000 | | 10,000 sq ft | 100 kW | 12,000 units | ₹1,20,000–₹2,00,000 | | 25,000 sq ft | 250 kW | 30,000 units | ₹3,00,000–₹5,00,000 | *Savings based on commercial tariff of ₹10–₹17/unit depending on state and consumption slab.* --- ## Tax Benefits for Commercial Solar in India This is where commercial solar becomes extremely attractive: ### 1. Accelerated Depreciation (AD) Under Section 32 of the Income Tax Act, solar energy systems qualify for **40% accelerated depreciation** in the first year. **Example:** - Investment: ₹50 lakh (500 kW system) - Year 1 depreciation claim: 40% = ₹20 lakh - Tax saved (30% tax rate): ₹6 lakh - **Effective net cost after tax benefit: ₹44 lakh (instead of ₹50 lakh)** In subsequent years, WDV depreciation continues at 40% of remaining value. ### 2. GST Input Tax Credit When your business is GST registered, you can claim Input Tax Credit (ITC) on the GST paid for solar equipment: - Solar equipment attracts 12% GST - ITC can be claimed against output GST liability - **For a ₹50 lakh system: ₹5.36 lakh ITC recovery** ### 3. Green Energy Tax Benefits Some states offer additional benefits: - **Maharashtra:** Special incentive for green energy consumption - **Gujarat:** Industrial solar policy offers additional capital subsidy for MSMEs - **Rajasthan:** Wheeling charges concessions for solar consumers ### Combined Financial Impact (₹50 lakh installation): | Benefit | Amount | |---------|--------| | Year 1 Accelerated Depreciation Tax Saving | ₹6,00,000 | | GST Input Credit | ₹5,36,000 | | **Effective Net Investment** | **₹38,64,000** | | Annual Electricity Savings | ₹12,00,000–₹20,00,000 | | **Payback Period** | **2–3 years** | --- ## Commercial vs Residential Solar: Key Differences | Factor | Residential | Commercial | |--------|------------|------------| | Subsidy | PM Surya Ghar (up to ₹78,000) | No central subsidy (state schemes vary) | | Tax Benefits | Minimal | Significant (AD + GST ITC) | | Net Metering Limit | 10 kW per connection | 500 kW per connection | | Tariff Rate | Lower (₹5–₹10/unit typical) | Higher (₹8–₹17/unit typical) | | ROI Period | 4–7 years | 3–5 years | | Financing Options | Limited | Equipment loans, RESCO, lease | **Net effect:** Commercial buyers get better ROI despite no subsidy because the higher tariff rates and tax benefits more than compensate. --- ## Financing Options for Commercial Solar ### 1. Capex (Own Purchase) - Pay full cost upfront - Own the system, get all benefits - Best for businesses with available capital - Access to all tax benefits (AD, GST ITC) ### 2. Solar Loans (Equipment Financing) Several banks offer solar-specific loans: - **SBI Surya Shakti:** Up to ₹5 crore, 7–10% interest, 10-year tenure - **PNB Solar:** MSME focused, competitive rates - **Private banks (HDFC, ICICI):** Green energy loans at 9–12% ### 3. RESCO (Renewable Energy Service Company) Model - Developer installs solar at no upfront cost to you - You sign 15–25 year Power Purchase Agreement (PPA) - Pay per unit of solar consumed (lower than grid rate) - Developer owns, maintains, and insures the system - **Ideal for:** Businesses that want zero capital expenditure ### 4. Operating Lease - Pay monthly lease instead of purchasing - Asset stays off balance sheet (operating expense, not capex) - **Ideal for:** Businesses that want opex model for accounting reasons --- ## Step-by-Step Process for Commercial Solar ### Phase 1: Assessment (Week 1–2) 1. Shadow and rooftop analysis by installer 2. Review electricity bills (last 12 months) for consumption pattern 3. Structural assessment of rooftop (load-bearing capacity) 4. Quotations from 3+ vendors ### Phase 2: Technical Design (Week 3–4) 1. Single-line diagram (SLD) preparation 2. System design (panel layout, string configuration) 3. Final commercial proposal with financial projections ### Phase 3: DISCOM Approvals (Week 5–10) 1. Application for net metering/open access 2. DISCOM feasibility study and transformer assessment 3. Approval letter from DISCOM ### Phase 4: Installation (Week 11–16) 1. Equipment procurement and delivery 2. Mounting structure installation 3. Panel and inverter installation 4. Wiring and safety equipment installation 5. Testing and commissioning ### Phase 5: Metering and Go-Live (Week 17–20) 1. DISCOM meter change to net/bidirectional meter 2. Trial operation and monitoring setup 3. Commissioning certificate from DISCOM 4. Connection to monitoring platform (app-based) --- ## What to Check When Shortlisting Commercial Solar Vendors For commercial installations, the stakes are higher. In addition to the standard questions, ask: 1. **EPC experience above 100 kW** — large systems need different expertise 2. **References from commercial clients** — factories, hotels, hospitals 3. **Insurance coverage** during installation (contractor all risk policy) 4. **Performance monitoring with SLA** — guaranteed uptime commitment 5. **Grid compliance** — IEC 61727, IS 13160, grid code compliance --- ## Which Businesses Benefit Most from Solar? **High ROI (short payback):** - Manufacturing plants (high daytime consumption = high self-consumption) - Cold storage facilities (24/7 high loads, solar reduces day costs) - Hotels and hospitality (large rooftops, high AC loads) - Educational institutions (high daytime usage, often large rooftops) - Hospitals (critical loads, solar + battery for backup) **Moderate ROI:** - IT parks and offices (high daytime usage but expensive urban land) - Retail malls (mixed day/night consumption) - Warehouses (large rooftop, low consumption — better for open access) [Find commercial solar installers in your city →](https://gosolarindex.in)