Quick Answer: Solar installation in Coimbatore costs ₹50,000-60,000 per kW after PM Surya Ghar subsidy (₹78,000 for 3kW+). Coimbatore receives 5.5 kWh/m²/day solar irradiance — among the best in India. A 3kW residential system generates ~400 units/month and pays for itself in 3-3.5 years.

Coimbatore — Tamil Nadu's industrial capital — is one of the best cities in India to switch to solar energy. With a dense concentration of manufacturing units, textile mills, and a rapidly growing residential sector, the city consistently ranks among the highest electricity consumers in the state. TANGEDCO's domestic tariffs have risen steadily, with higher consumption slabs now attracting rates above ₹8/unit, making the economics of solar more compelling every year.

Coimbatore receives approximately 5.5 kWh/m²/day of solar irradiance — well above the national average — thanks to its location on the leeward side of the Western Ghats, with predominantly clear skies and high solar hours year-round. That means your solar panels work harder here than in most other cities.

Tristar Green Energy Solutions has been installing solar systems in Coimbatore since 2013. From small residential rooftops in RS Puram to large industrial arrays in Singanallur, we have completed 500+ installations across Tamil Nadu and understand the specific requirements of Coimbatore's grid infrastructure, TANGEDCO procedures, and the local building styles that determine how systems are designed.

Coimbatore's Electricity Landscape

Understanding your current electricity cost is the first step to calculating your solar return on investment.

TANGEDCO Domestic Tariffs (LT-1, 2024–25)

TANGEDCO's LT-1 (domestic) tariff is structured in consumption slabs:

0–100 units/month: ₹0 (free up to 100 units under Tamil Nadu free electricity scheme)
101–200 units: ₹3.50/unit
201–500 units: ₹4.60/unit
501–1000 units: ₹6.60/unit
Above 1000 units: ₹8.05/unit

A typical 3BHK household in Coimbatore consuming 400–500 units/month pays approximately ₹1,500–2,000/month. A larger villa or apartment consuming 700–1,000 units can pay ₹4,000–7,000/month. This is where solar delivers its strongest returns.

TANGEDCO Commercial Tariffs (LT-3)

Commercial and industrial consumers on LT-3 pay significantly higher rates — typically ₹7–8/unit — plus fixed charges and demand charges for higher-load connections. At these rates, even modest commercial systems (20–50kW) can generate annual savings of ₹3–6 lakh.

Coimbatore's manufacturing clusters — particularly those in Peelamedu, Ganapathy, and the Singanallur industrial belt — operate on three-phase connections with monthly consumption often exceeding 50,000 units. At ₹7–8/unit, that is a monthly electricity bill of ₹3.5–4 lakh. Solar can offset 60–80% of this cost.

Residential Solar in Coimbatore

System Sizing for Coimbatore Homes

Choosing the right system size is the most important decision in going solar. Oversizing wastes capital; undersizing leaves significant savings on the table.

A general rule: 1kW of solar generates 4–5 units/day in Coimbatore's high-irradiance climate, or approximately 130–150 units/month.

Recommended sizing by home type:

2BHK apartment (200–300 units/month): 2–3kW system
3BHK independent house (300–500 units/month): 3–5kW system
Large villa / duplex (500–800 units/month): 5–8kW system
Large villa with EV or pool (800–1,200 units/month): 8–10kW system

For roof space, plan for approximately 100 sq ft per kW of system capacity. A 3kW system needs roughly 300 sq ft of unshaded roof area.

Flat terrace vs. sloped tile roof in Coimbatore:

Most Coimbatore homes — both older tile-roofed houses in areas like Saibaba Colony and modern RCC terraces in layouts like Sowripalayam — are well-suited for solar. Flat RCC terraces allow for optimally angled mounting structures (typically 11° for Coimbatore's latitude), which maximises annual generation. Sloped tile roofs require tile hooks and mounting rails but are equally viable — we install on both without structural modifications to the roof.

Residential Costs After PM Surya Ghar Subsidy (2026)

The central government's PM Surya Ghar Muft Bijli Yojana provides direct subsidies to residential rooftop solar installations. After subsidy, the net cost of going solar in Coimbatore is lower than at any point in history.

System Size	Gross Cost	PM Surya Ghar Subsidy	Net Cost	Monthly Savings	Payback
2kW	₹1,40,000	₹60,000	₹80,000	~₹1,400	~4.8 yrs
3kW	₹1,90,000	₹78,000	₹1,12,000	~₹2,100	~4.4 yrs
5kW	₹2,90,000	₹78,000	₹2,12,000	~₹3,500	~5 yrs

Costs are indicative for grid-tied on-roof systems using Tier-1 panels and a good-quality string inverter. Savings are calculated at blended TANGEDCO LT-1 tariff including fixed charges. Actual payback depends on consumption profile.

After payback, your system continues generating free electricity for 20–25 years. A 3kW system installed today will have generated roughly ₹6–8 lakh in electricity savings over its lifetime.

TANGEDCO Net Metering in Coimbatore

Net metering is the mechanism that makes on-grid solar financially attractive. When your panels generate more power than your home consumes — typically during midday — the surplus is exported to the TANGEDCO grid, and you receive credit on your electricity bill. Those credits offset the units you import at night.

How it works:

TANGEDCO installs a bidirectional net meter at your premises
Exported units are recorded separately and credited against imports
At billing cycle end, you pay only the net consumption (imported minus exported)
Unused credits carry forward for up to 12 months

Application timeline: After your solar system is installed, Tristar submits the net metering application to TANGEDCO's local section office in Coimbatore on your behalf. Approval and meter installation typically takes 2–4 weeks. During this period, your system operates in a limited mode.

Tristar handles the complete TANGEDCO application process — technical drawings, system specifications, form submissions, and follow-up — at no additional charge. You do not need to visit any office.

PM Surya Ghar Subsidy — Applying in Coimbatore

The PM Surya Ghar Muft Bijli Yojana is a central government programme offering direct bank transfers (DBT) to residential solar customers. The subsidy structure in 2026:

Up to 2kW: ₹30,000/kW (₹60,000 for a 2kW system)
2–3kW: ₹18,000/kW for the additional capacity (total ₹78,000 for 3kW)
Above 3kW: Fixed at ₹78,000 regardless of system size

Application process:

Register at pmsuryaghar.gov.in
Apply using your TANGEDCO consumer number
Get a feasibility approval
Choose an MNRE-approved vendor (Tristar is empanelled)
Install system, submit inspection report
Subsidy credited directly to your bank account

Documents required: Aadhaar card, TANGEDCO electricity bill (last 3 months), bank account details, and proof of roof ownership or owner's consent letter.

As a PM Surya Ghar approved vendor, Tristar manages the entire application process from registration to subsidy disbursement. Most of our Coimbatore customers receive their subsidy within 30–45 days of system commissioning.

Commercial Solar in Coimbatore

Who Benefits Most?

Coimbatore's industrial character makes it one of India's best cities for commercial solar investment. The businesses that see the strongest returns:

Manufacturing units consuming 50,000+ units/month — textile, pump motors, auto components, plastics
Textile mills in Tiruppur road belt and Avinashi road with large roof areas and high daytime consumption
IT parks and tech campuses in Peelamedu and Saravanampatti with consistent daytime loads
Hospitals and healthcare facilities requiring reliable power with low per-unit cost
Hotels and hospitality properties with high AC and water heating loads
Educational institutions with large open roof areas and predictable daytime consumption

The common thread: high daytime electricity consumption + large available roof area = maximum solar utilisation and fastest payback.

Commercial System Costs and ROI

System Size	Approx. Investment	Annual Savings	Payback
50kW	₹25–28 lakh	₹5–7 lakh	4–5 yrs
100kW	₹45–50 lakh	₹10–12 lakh	4 yrs
200kW	₹85–95 lakh	₹20–24 lakh	~4 yrs

Investment includes supply, installation, GST, and TANGEDCO approvals. Savings calculated at ₹7.50/unit blended commercial tariff. Actual figures depend on load profile, roof orientation, and shading.

40% Accelerated Depreciation

For companies that file income tax returns, commercial solar qualifies for 40% accelerated depreciation under Section 32 of the Income Tax Act. In the first year, 40% of the system cost can be written off against taxable profit — effectively reducing the net cost of the system by 40% × your tax rate.

For a business in the 25% tax bracket installing a ₹50 lakh system:

Year 1 depreciation benefit: ₹50L × 40% × 25% = ₹5 lakh tax saving
This alone reduces your effective payback period by nearly a year

Tristar provides all the necessary documentation for depreciation claims, including CA-certified system valuations.

3-Phase Industrial Systems for Coimbatore Factories

Coimbatore's large manufacturing units typically operate on LT-3 or HT (High Tension) connections with three-phase supply. Solar systems for these consumers are designed differently from residential installations:

String inverters (5–50kW each, multiple units in parallel) are preferred for systems up to 200kW — easier maintenance, no single point of failure
Central inverters (100kW+) offer lower cost per kW for very large installations (500kW+)
Three-phase balancing and harmonic mitigation is addressed during system design

For HT consumers, the economics are even stronger. HT tariffs in Tamil Nadu reach ₹8–9/unit including demand charges, and net metering provisions allow HT consumers to offset a substantial portion of their grid draw.

Best Solar System Type for Coimbatore

On-Grid (Recommended for Most)

On-grid (grid-tied) solar systems connect directly to the TANGEDCO grid through a net meter. They have no batteries and are the lowest-cost option.

Best for: Homes, apartments, offices, and factories with reliable grid supply and daytime consumption.

Why: Lowest upfront cost, TANGEDCO net metering earns credits for exported power, eligible for PM Surya Ghar subsidy, 20–25 year system life with minimal maintenance.

Hybrid (Battery Backup)

Hybrid systems combine grid-connected solar with battery storage. They generate solar power during the day, store surplus in batteries for evening/night use, and fall back to the grid only when batteries are depleted.

Best for: Hospitals, data centres, diagnostic labs, manufacturing units with sensitive CNC or automation loads, and homes in areas with frequent grid outages.

Cost premium: Approximately 50–60% higher than equivalent on-grid system, primarily due to battery cost. Lithium iron phosphate (LFP) batteries used in modern hybrid systems have 10–15 year lifespans.

Off-Grid

Off-grid systems operate entirely independently of the TANGEDCO grid — generating, storing, and managing all power on-site. They require large battery banks and are significantly more expensive per kWh generated.

Best for: Remote agricultural properties, farm houses, and sites in Coimbatore rural areas where TANGEDCO connection is unavailable or prohibitively expensive.

Government Subsidies Available in Coimbatore

PM Surya Ghar Yojana (Central Government)

₹30,000/kW for the first 2kW, ₹18,000/kW for 2–3kW, capped at ₹78,000 for 3kW and above
Residential on-grid only, MNRE-approved vendor mandatory
No income limit — available to all homeowners

TEDA (Tamil Nadu Energy Development Agency)

The Tamil Nadu state solar programme through TEDA complements central subsidies and facilitates faster TANGEDCO approvals. TEDA-registered installers like Tristar benefit from a streamlined approval pipeline for both residential and commercial systems in Coimbatore.

PM-KUSUM (Agricultural Solar)

Farmers in Coimbatore district's rural taluks — including Pollachi, Palladam, Annur, and Mettupalayam — can access the PM-KUSUM scheme for solar-powered agricultural pump sets and small-scale farm solar installations. Component B of PM-KUSUM provides 90% subsidy (60% central + 30% state) for solar pump installation.

Tristar assists Coimbatore district farmers with PM-KUSUM applications through the district agriculture office.

Why Choose Tristar Green Energy Solutions in Coimbatore?

Tristar Green Energy Solutions is headquartered at 25 Annai Fathima Nagar, Vellakinar, Coimbatore – 641029. We are not a distant company serving Coimbatore from Chennai — we are based here, and your installation team, service engineers, and customer support are all local.

Our credentials:

13+ years of solar installation experience (since 2013)
500+ installations across Tamil Nadu, Pondicherry, and Andaman & Nicobar Islands
MNRE (Ministry of New and Renewable Energy) approved installer
TEDA registered for Tamil Nadu state solar programmes
TANGEDCO empanelled — we submit net metering applications directly
PM Surya Ghar approved vendor — we manage the full subsidy process

What this means for you:

We know every TANGEDCO section office in Coimbatore and their procedures
We survey all Coimbatore taluks including city, Pollachi, Mettupalayam, Palladam, Annur, and Sulur
Post-installation O&M service is available within 24–48 hours
All installations come with a workmanship warranty and panel/inverter manufacturer warranties

Ready to get started? Visit our Solar Installation in Coimbatore page for a quick overview and instant quote, or use our solar calculator to estimate your savings.

Frequently Asked Questions

How much does solar installation cost in Coimbatore?

After PM Surya Ghar subsidy, residential systems in Coimbatore cost approximately ₹50,000–60,000 per kW. A 3kW home system costs around ₹1.5–1.8 lakh. Commercial systems range from ₹45,000–50,000 per kW. Use our free solar calculator for a personalised quote.

What is the best solar system for Coimbatore homes?

On-grid solar with TANGEDCO net metering is ideal for most Coimbatore homes — lowest cost, earns bill credits for exported power, and qualifies for PM Surya Ghar subsidy up to ₹78,000.

Does Tristar serve all areas of Coimbatore district?

Yes. We serve all areas of Coimbatore district including Coimbatore city, Pollachi, Mettupalayam, Palladam, Tiruppur (border), Annur, and surrounding taluks.

Can Coimbatore manufacturing units get solar subsidies?

Commercial and industrial installations above 10kW are not eligible for PM Surya Ghar subsidy, but qualify for 40% accelerated depreciation under Income Tax Act — significantly reducing effective cost. We assist with the complete process.

Get Your Free Solar Quote in Coimbatore

Whether you own a 2BHK apartment in Coimbatore city or run a 200kW factory in the industrial belt, going solar in 2026 is one of the best financial decisions you can make. Coimbatore's high solar irradiance, rising TANGEDCO tariffs, and the PM Surya Ghar subsidy combine to deliver payback periods of 4–5 years on systems that will generate free electricity for 25 years.

Start with our free solar savings calculator to estimate your system size, cost, and monthly savings based on your actual electricity bill. Ready to proceed? Contact us to schedule a free no-obligation site survey at your Coimbatore property — we'll visit, assess your roof, review your electricity bills, and give you a detailed written proposal.

To learn more about solar installation options specific to Coimbatore district, visit our dedicated Coimbatore solar installation page.

Solar Installation Guide for Coimbatore | 2026