Commercial Solar for Chennai Businesses.
Since July 2025, TANGEDCO charges commercial users Rs 8.80 per unit for smaller connections and Rs 12.15 per unit for larger premises — the highest category in Tamil Nadu. A 50 kW system saves Rs 61,600 every month from a system that costs under Rs 35 Lakhs and lasts 25 years.
Rs 12.15
Commercial Tariff /unit (2025)
5–200 kW
System Range
4–5 Yrs
Payback Period
40%
Accelerated Depreciation
70%
Average Bill Reduction
Commercial Buildings Have the Strongest Solar ROI in Tamil Nadu.
Commercial properties carry a burden residential users don't — the highest TANGEDCO tariff and no government subsidy. But this combination creates a uniquely strong solar return. Every unit your panels generate replaces a unit that costs Rs 8.80–12.15 versus Rs 4.50 for homes. Your saving from the same system is nearly double.
50 kW System — Monthly Savings by Premise Type
Retail showroom / Shop complex
Monthly bill
Rs 85,000–1,50,000
Solar saving
Rs 55,000–65,000
Office building (10,000 sq. ft)
Monthly bill
Rs 60,000–1,20,000
Solar saving
Rs 50,000–61,600
Private school or college
Monthly bill
Rs 75,000–2,00,000
Solar saving
Rs 55,000–90,000
Clinic or nursing home
Monthly bill
Rs 40,000–1,00,000
Solar saving
Rs 35,000–60,000
Hotel or guest house
Monthly bill
Rs 1,00,000–4,00,000
Solar saving
Rs 60,000–1,50,000
Apartment complex (common area)
Monthly bill
Rs 30,000–80,000
Solar saving
Rs 25,000–50,000
At Rs 8.80/unit commercial tariff (July 2025), Chennai solar irradiation. Actual saving varies by system size and tariff category.
Highest Tariff = Highest Return
At Rs 12.15/unit, every kWh saved is worth 2.7× more than a residential saving. No subsidy required when the tariff is this high.
No Subsidy? Still Pays Back in 4–5 Years
The absence of PM Surya Ghar subsidy does not weaken the case. Accelerated depreciation and the high tariff offset make commercial solar highly viable.
300+ Sunny Days Work in Your Favour
Chennai's irradiation ensures consistent year-round generation — no seasonal lows that break the ROI model.
The Right System for Your Building. Transparent Commercial Pricing.
Commercial solar design is driven by your daytime consumption — savings are highest when generation directly offsets real-time demand rather than being exported to the grid.
| Size | Suitable For | Daily Generation | Roof Area | Annual Saving |
|---|---|---|---|---|
5 kW | Small shop / Clinic | 20–22 units/day | ~45 sq. m | Rs 60K–80K/yr |
10 kW | Retail outlet / Small office | 40–45 units/day | ~85 sq. m | Rs 1.2–1.5 L/yr |
25 kW | Showroom / School block | 100–110 units/day | ~200 sq. m | Rs 3–3.5 L/yr |
50 kWPopular | Office complex / Nursing home | 200–220 units/day | ~400 sq. m | Rs 6–7.5 L/yr |
100 kW | Large building / College | 400–440 units/day | ~800 sq. m | Rs 12–15 L/yr |
200 kW | Mall / Hotel / Large institution | 800–880 units/day | ~1,600 sq. m | Rs 24–30 L/yr |
Available to Registered Commercial Entities
Businesses, companies, LLPs, and proprietorship firms that own a commercial solar system are eligible for 40% Accelerated Depreciation under Section 32 of the Income Tax Act. Heliostrom provides the full documentation package ready to file with your CA.
System investment
Rs 35 Lakhs
50 kW example
Year 1 AD claim (40%)
Rs 14 Lakhs
Depreciation amount
Tax saved at 25%
Rs 3.5 Lakhs
Direct tax benefit
Effective cost
Rs 31.5 Lakhs
After Year 1 AD
Solar for Every Type of Commercial Building.
Heliostrom has designed and installed systems across all major commercial property types in Tamil Nadu.
Retail Shops & Showrooms
10–50 kW on-grid
Reduce AC and lighting costs during business hours
Often limited roof area — use TOPCon high-density panels
Office Buildings
25–100 kW on-grid
Weekday daytime load matches solar peak hours perfectly
AC dominates load — size to cover peak AC consumption
Schools & Colleges
50–300 kW on-grid
Day-school hours exactly match solar generation. Very fast ROI.
Large rooftop available — aggregate multiple blocks
Hospitals & Clinics
25–200 kW hybrid
Reduce operating costs + ensure backup for critical loads
Hybrid essential — no interruption during grid cuts
Hotels & Resorts
50–200 kW on/hybrid
High AC, kitchen, and common area daytime loads offset well
Guest room AC and pool pumps are primary loads
Apartment Complexes
10–50 kW on-grid
Reduce shared electricity cost across all residents
Connected to common meter only — simple installation
Petrol Stations
15–50 kW on-grid
Canopy roof ideal — AC and compressor loads run all day
Canopy-integrated mounting — waterproof design essential
Complete Turnkey Commercial Solar. One Quote. Nothing Hidden.
Every element from site survey to first net metering statement is included in the price we quote.
Hardware Supplied
- Tier-1 mono-PERC or TOPCon panels (540–600 Wp)
- Commercial-grade string inverter with online monitoring
- Hot-dip galvanised or aluminium mounting structure
- DC and AC weather-proof cabling
- Earthing array and lightning protection system
- AC distribution box and protection circuit
- Generation meter where required by TANGEDCO
Installation Services
- Free rooftop site survey and load analysis
- Engineering design — panel layout, structural, electrical
- Mounting structure fabrication and installation
- Panel placement, wiring, inverter commissioning
- TANGEDCO net meter application and follow-up
- System testing and sign-off before handover
- Staff training on system operation
Post-Installation Support
- Web and mobile monitoring dashboard setup
- 25-year manufacturer panel performance warranty
- Inverter warranty (5 years standard, 10 extendable)
- 1-year workmanship warranty by Heliostrom
- AMC packages for annual inspection and cleaning
- Accelerated depreciation documentation support
Not included: civil structural reinforcement if rooftop load bearing is insufficient, TANGEDCO connection capacity upgrade fees if needed, or cable runs beyond 40 metres. These are always identified and communicated transparently at the site survey before you approve the project.
Five Steps. Survey to First Reduced EB Bill.
Free Site Survey
Our engineer visits during your business hours. Rooftop area mapping, shade analysis, electrical load assessment from 12-month EB bills, connection type check, and initial system recommendation. No cost. No obligation.
Fixed Proposal
Exact system design, component list, projected monthly generation, month-by-month savings table, accelerated depreciation benefit, ROI, and payback — specific to your building and EB tariff category.
Installation
Our certified team works on the rooftop with no disruption to your business. Single scheduled power shutdown of 60–90 minutes for final electrical connection. Typical commercial installation: 1 to 3 days.
TANGEDCO Net Meter
Heliostrom submits the net meter application and manages all follow-up. You do not visit any office. We track the approval and inform you when the bi-directional meter is active.
Monitoring and Support
System live. You receive login to the monitoring dashboard — daily generation, savings, performance vs expected. Support team available throughout the system's 25-year life.
Ready to Reduce Your Commercial EB Bill?
Free commercial site survey. Our engineer visits, analyses your EB bills, and delivers a site-specific ROI proposal — at no cost and no commitment.
What Heliostrom Does Differently for Commercial Clients.
We Quote Against Your Actual Tariff Slab
Commercial EB bills vary enormously by connection type. We pull your exact tariff category from your bill and calculate savings at your actual rate — Rs 8.80 or Rs 12.15. Your ROI is accurate, not optimistic.
Business Hours Installation. Zero Disruption.
We plan all rooftop work around your business schedule. The only interruption is a single 60–90 minute power shutdown for the final electrical connection — outside your peak hours.
Accelerated Depreciation Documents Ready to File
Heliostrom provides the full documentation package — CA certificate format, commissioning report, and system specifications in the format your CA needs for Year 1 depreciation filing.
Tier-1 Panels. 25-Year Performance Warranty.
Your commercial premises is a customer-facing asset. We install only Tier-1 manufacturer panels with genuine 25-year performance warranties — no budget alternatives that underperform in Chennai's heat.
Complete TANGEDCO Process. No Office Visits.
We manage the full TANGEDCO net meter process — application, inspection scheduling, follow-up, confirmation. Most commercial connections take 2–4 weeks. You are updated at every stage.
Support for the System's Full 25-Year Life
AMC packages include annual inspections, cleaning, performance reporting, and warranty claim management — handled by the same team that installed your system, not a third-party call centre.
Frequently Asked Questions
Everything commercial solar — finances, installation, regulations, and operations.
Still have questions?
Our commercial solar team is available Mon–Sat, 9 AM to 6 PM.
Call +91 95516 87608Cities served
Chennai · Tambaram · Velachery · Porur · OMR · Coimbatore · Madurai · Trichy · Salem · Tirunelveli · Hosur · Vellore
Heliostrom installs commercial rooftop solar for shops, offices, schools, colleges, hospitals, nursing homes, hotels, showrooms, petrol stations, and apartment complexes across Chennai, Tambaram, Velachery, Porur, OMR, Coimbatore, Madurai, Trichy, Salem, Tirunelveli and all major Tamil Nadu cities. MNRE approved. TANGEDCO net metering. 40% accelerated depreciation. Free site survey.