Industrial Solar Power Plants in Chennai.
Tamil Nadu charges industries on TANGEDCO's LT tariff at Rs 7.50 per unit. HT-connected factories pay Rs 6.75/unit — plus demand charges of Rs 550 per kVA per month. A correctly sized rooftop solar plant eliminates 60–80% of your energy charge for 25 years, with a 4–5 year payback and 40% accelerated depreciation benefit from Year 1.
50 kW
Minimum System Size
5 MW
Maximum System Size
4–5 Yrs
CAPEX Payback
40%
Accelerated Depreciation
25+
Years System Life
Why Tamil Nadu Factories Are Going Solar Now — and What It Costs to Wait.
TNERC has revised TANGEDCO tariffs annually. A factory consuming 30,000 units/month pays approximately Rs 2,25,000 every month — Rs 27,00,000 per year — to TANGEDCO alone. Solar locks out 60–70% of that forever.
The Cost of Waiting
- TNERC tariff rises every 1–2 years. Each hike is permanent and compounding.
- Demand charges (Rs 550/kVA/month for HT) add a fixed monthly burden beyond unit consumption.
- DG fuel costs add an extra layer when the grid fails.
- July 2025 revision added another 3.16% — with no ceiling and no notice.
What Solar Fixes
- Solar generation cost is effectively zero for 25 years. No tariff escalation ever.
- Daytime grid consumption drops 60–80%, reducing both energy and demand charges.
- Hybrid systems eliminate DG dependency during power cuts.
- The tariff you lock out today stays locked out for 25 years.
What Heliostrom Does Differently
- We design against your 12-month consumption data — not a generic system size.
- We account for demand charge reduction — a saving most installers never show.
- Fixed-price proposal. No post-installation surprises.
- MNRE approved. TANGEDCO paperwork fully managed.
From 50 kW to 5 MW. Every System Engineered for Your Load Profile.
Below is a reference guide for typical industrial users in Tamil Nadu. Costs are based on TANGEDCO LT industrial tariff of Rs 7.50/unit and 300+ annual sunny days in Chennai.
| System Size | Typical Industry | Daily Generation | Roof Area | Annual Saving | CAPEX Cost |
|---|---|---|---|---|---|
50 kW | SME / Printing unit | 200–220 units | ~400 sq. m | Rs 15–18 L/yr | Rs 32–40 Lakhs |
100 kW | Auto ancillary / Medium factory | 400–440 units | ~800 sq. m | Rs 30–36 L/yr | Rs 62–75 Lakhs |
200 kWPopular | Textile / Pharma / Food | 800–880 units | ~1,600 sq. m | Rs 60–72 L/yr | Rs 1.2–1.5 Cr |
500 kW | Large manufacturer / Cold storage | 2,000–2,200 units | ~4,000 sq. m | Rs 1.5–1.8 Cr/yr | Rs 3–3.5 Crores |
1 MW+ | Large industrial / SEZ | 4,000+ units | ~8,000 sq. m+ | Rs 3 Cr+/yr | Rs 5.5–7 Crores |
Solar Panels
- Mono-PERC and TOPCon technology, 540–600 Wp panels
- Bifacial panels for east-west or ground-mounted applications
- 25-year linear performance warranty from Tier-1 manufacturers
- Temperature coefficient: 0.35%/°C — suited for Chennai heat
- IEC 61215 and IEC 61730 certified
Inverters & Monitoring
- String inverters for 50–200 kW systems — individual string monitoring
- Central inverters for 500 kW+ — lower cost per kW
- SCADA-compatible monitoring with real-time energy dashboard
- Grid synchronisation and anti-islanding protection (IEEE 1547)
- Optional DG synchronisation for uninterrupted plant operations
Structure & Balance of System
- Hot-dip galvanised GI or aluminium structures per rooftop capacity
- DC underground cabling for neat layouts and reduced cable losses
- Earthing system designed per IS 3043
- Lightning protection array for all industrial systems
- AMC with 24/7 remote monitoring and annual thermographic inspection
CAPEX or OPEX. Two Ways to Go Solar. Both Work.
Most factories prefer CAPEX for ownership and the depreciation benefit. The OPEX model suits companies with constrained capital budgets or those wanting zero asset responsibility.
CAPEX Model
Own the system. Keep 100% of savings.
OPEX / PPA Model
Buy the power, not the system.
200 kW System — Rs 1.35 Crore Investment
Under Section 32 of the Income Tax Act, renewable energy assets can claim 40% of asset value as depreciation in Year 1.
Standard Depreciation (10%)
Year 1 depreciation claim
Rs 13.5 Lakhs
Tax saved at 25% corporate rate
Rs 3.38 Lakhs
Effective system cost
Rs 1.32 Crores
Accelerated Depreciation (40%)
Year 1 depreciation claim
Rs 54 Lakhs
Tax saved at 25% corporate rate
Rs 13.5 Lakhs
Effective system cost
Rs 1.22 Crores
Additional saving with AD vs Standard
Rs 10.12 L
Extra tax benefit in Year 1 alone
Illustrative at 25% corporate tax rate. Consult your CA for project-specific planning. Heliostrom provides full documentation support.
Every Industry Type Has a Different Load Profile. We Design for Yours.
Heliostrom has installed solar for diverse industry types across Tamil Nadu. Here is how solar performs across the most common sectors.
Textile / Garment
High daytime load aligns with solar generation hours
Auto Component / Engineering
2–3 shifts. Solar covers day-shift consumption effectively.
Food Processing / Cold Storage
Hybrid + battery eliminates DG dependency
Pharma / Chemical
Critical process load. Hybrid + DG sync eliminates downtime.
Printing / Packaging
Strong daytime consumption match. Fastest payback category.
Warehousing / Logistics
Large flat roof areas ideal for maximising panel count.
Engineering / Medical Colleges
Day-time institutional load aligns with solar peak.
Three Projects. Exact Figures. No Guesswork.
Based on projects completed by Heliostrom for industrial clients in Tamil Nadu. All savings figures are based on actual monthly generation data compared against pre-solar EB bills.
Auto Component Manufacturer
Ambattur Industrial Estate, Chennai
Before solar
Rs 4,65,000/mo
After solar
Rs 3,12,000/mo
Monthly saving: Rs 1,53,000/mo
"No production shutdown. Installed in 3 working days on metal shed."
Food Processing Unit
Sriperumbudur
Before solar
Rs 8,25,000/mo
After solar
Rs 5,58,000/mo
Monthly saving: Rs 2,67,000/mo
"Battery handles grid transitions. DG fuel saved: Rs 4.5 L/yr additionally."
Textile Manufacturing Unit
Tiruppur
Before solar
Rs 16,50,000/mo
After solar
Rs 12,00,000/mo
Monthly saving: Rs 4,50,000/mo
"Per-unit production cost dropped Rs 0.23 — direct competitive advantage."
Survey to Energisation. How Heliostrom Executes an Industrial Solar Project.
Industrial Site Assessment
Our engineer visits your facility. 12-month EB bill analysis, connected load list, shift pattern study, rooftop structural assessment, shading analysis, and preliminary system sizing. Free. No commitment.
Engineering and Proposal
Detailed system design: panel layout, inverter selection, cabling route, earthing design, month-by-month savings table, CAPEX vs OPEX comparison, ROI and payback specific to your factory.
TANGEDCO and TEDA Approval
For systems above 20 kW, TANGEDCO technical approval is required. Heliostrom prepares and submits the complete application and follows up to receive approval. You do not visit any office.
Installation and Commissioning
Structure fabrication and installation. Panel mounting. Inverter and electrical works. SCADA monitoring setup. Load testing and performance verification before handover.
Net Meter and Energisation
TANGEDCO net meter application submitted and followed up by Heliostrom. Bi-directional meter installation enables export of surplus generation to grid under TNERC Regulation 2021.
Ready to Cut Your Factory's EB Bill?
Get a free industrial site assessment. Our engineer visits your facility, analyses your consumption data, and provides a site-specific ROI proposal — at no cost and no commitment.
Frequently Asked Questions
Everything you need to know about industrial solar — finances, regulations, installation, and operations.
Still have questions?
Our industrial solar engineers are available Mon–Sat, 9 AM to 6 PM.
Call +91 95516 87608Industrial areas served
Ambattur · Sriperumbudur · Sipcot Gummidipoondi · Maraimalai Nagar · Oragadam · Guindy Industrial Estate · Coimbatore · Tiruppur · Madurai · Salem · Trichy · Hosur · Ranipet
Heliostrom installs industrial rooftop solar power plants across Chennai, Ambattur, Sriperumbudur, Coimbatore, Tiruppur, Madurai, Salem, Trichy and all major industrial corridors in Tamil Nadu. Auto ancillary, textile, pharma, food processing, engineering, packaging, and logistics industries served. MNRE approved. TANGEDCO net metering. CAPEX and OPEX models.