What is solar energy and how do solar panels work?

Solar panels convert sunlight into electricity using photovoltaic (PV) cells. When sunlight hits these cells, it creates an electric field that generates direct current (DC) electricity. An inverter then converts this DC power into alternating current (AC) that can be used to power your home or business.

How long do solar panels last?

Modern solar panels are designed to last 25–30 years or more. Most manufacturers provide a 25-year performance warranty guaranteeing at least 80% of the original output. With proper maintenance, panels can continue producing electricity well beyond their warranty period.

Do solar panels work during cloudy days or monsoon?

Yes, solar panels work during cloudy days, though at reduced efficiency (typically 10–25% of rated capacity). During monsoon you'll still generate power, especially during breaks in the clouds. Over a year, seasonal variations balance out and you'll still see significant savings.

What maintenance do solar panels require?

Solar panels require minimal maintenance. Regular cleaning every 2–3 months to remove dust and debris is usually sufficient. We recommend an annual professional inspection to check connections and overall system health.

How much solar potential does Tamil Nadu have?

Tamil Nadu is one of India's leading states for solar energy with approximately 300 sunny days per year. The state receives an average solar radiation of 5.5–6 kWh/m²/day, making it ideal for solar installations. Chennai, Coimbatore, Madurai, and surrounding areas all have excellent solar potential.

What government subsidies are available in Tamil Nadu?

Under the PM Surya Ghar Yojana scheme, residential solar installations qualify for subsidies: ₹30,000 for 1 kW, ₹60,000 for 2 kW, and ₹78,000 for 3 kW & above. TANGEDCO also offers net metering benefits.

How does net metering work in Tamil Nadu?

Net metering allows you to export surplus solar power to the TANGEDCO grid. Your meter runs backward when exporting, and you're credited for the units at the same rate you pay. Excess units are carried forward for up to 12 months.

What approvals are needed for solar installation in Tamil Nadu?

Grid-connected solar systems in Tamil Nadu require: TANGEDCO net metering application and approval, electrical safety inspection certificate, and building plan approval for new constructions. For PM Surya Ghar subsidy, you need registration on pmsuryaghar.gov.in, installation by an MNRE empanelled vendor, and TANGEDCO commissioning. Tristar handles all paperwork and approvals end-to-end.

What is the approximate cost of solar installation?

After PM Surya Ghar subsidy, approximate residential solar costs in Tamil Nadu: 1kW system Rs 40,000-50,000, 2kW Rs 80,000-90,000, 3kW Rs 1,10,000-1,30,000, 5kW Rs 2,20,000-2,60,000, 10kW Rs 4,50,000-5,00,000. Commercial systems cost Rs 35,000-45,000 per kW. Industrial systems cost Rs 30,000-40,000 per kW.

What is the payback period for solar investment?

Residential systems with net metering in Tamil Nadu typically pay back in 4–5 years. Commercial systems see payback in 3–4 years due to higher electricity tariffs. After payback, you enjoy virtually free electricity for the remaining 20+ years of panel life.

Are there financing options available?

Tristar offers multiple financing options: Zero-down EMI plans through partner banks (SBI, Bank of Baroda), solar loans at 7-9% interest with up to 10-year tenure, and Power Purchase Agreements (PPA) for commercial customers requiring zero capital expenditure. The PM Surya Ghar subsidy of up to Rs 78,000 is applied to reduce the total cost.

How much can I save on my electricity bills?

A properly sized solar system typically reduces electricity bills by 70-90%. A Tamil Nadu home consuming 500 units per month can save Rs 3,000-4,000 monthly with a 5kW system. With net metering, excess power is credited to your TANGEDCO bill. Typical payback period is 3-5 years, after which electricity is essentially free for 20+ years.

What is the difference between on-grid, off-grid, and hybrid systems?

On-Grid systems connect to the TANGEDCO grid, are the lowest cost option, and earn net metering credits — best for urban areas with reliable power. Off-Grid systems are fully independent with battery storage, ideal for remote locations without grid access. Hybrid systems combine grid connection with battery backup, providing power during outages while still earning net metering credits — recommended for areas with frequent power cuts.

How much roof space do I need?

Approximately 100 sq.ft. per kW of solar capacity. A typical 3 kW residential system needs about 300 sq.ft. of shadow-free roof space. Our site assessment determines the exact space available and optimal panel placement for maximum generation.

How long does installation take?

Residential installations typically take 1–2 days once materials arrive. The complete process from site assessment to commissioning takes 2–4 weeks, including TANGEDCO approvals. Commercial and industrial projects may take longer depending on system size.

What happens during power outages?

On-grid systems automatically shut off during outages for safety (anti-islanding protection). Hybrid systems with battery backup continue to provide power. If uninterrupted power is essential, we recommend a hybrid system with adequate battery capacity.

Do you install solar in Tirupur district?

Yes — we cover all of Tirupur district including Tirupur city, Avinashi, Dharapuram, Kangeyam, Udumalpet, and Palladam. We specialise in commercial solar for Tirupur's textile and knitwear industries as well as residential installations.

What solar system is best for Ooty's hill climate?

Hybrid solar with battery backup is best for Ooty and Nilgiris district. Hill areas experience more cloud cover and grid outages — battery storage ensures reliable power. Solar panels actually perform more efficiently in Ooty's cooler temperatures. We also install off-grid systems for remote hill properties and estates.

Is solar viable for agricultural land in Erode?

Absolutely. Erode's farmers benefit greatly from solar irrigation pumps under the PM-KUSUM scheme, which offers up to 60% subsidy. Solar pumps eliminate diesel and EB costs for irrigation. We install 1 HP to 10 HP solar pump systems across Erode district including Bhavani, Gobichettipalayam, and Sathyamangalam.

Do you cover all of Coimbatore district including Pollachi and Mettupalayam?

Yes — we serve all areas of Coimbatore district: Coimbatore city, Pollachi, Mettupalayam, Palladam, Annur, Sulur, Kinathukadavu, and all surrounding taluks. Our headquarters is in Coimbatore, so we respond quickly to site survey requests.

Frequently Asked Questions

Name: Tristar Green Energy Solutions
Address: 25 Annai Fathima Nagar, Vellakinar PO, Coimbatore, Tamil Nadu, 641029, IN
Telephone: +91-90259-25808
Price range: ₹₹

Find answers to common questions about solar energy, installation, costs, and more.

General Solar Questions

Solar in Tamil Nadu

Costs & Savings

Installation & Technical

Solar in Our Districts

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Tristar Green Energy Solutions — Solar Installation Tamil Nadu

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Tristar Green Energy Solutions
25 Annai Fathima Nagar, Vellakinar PO, Coimbatore, Tamil Nadu 641029
Phone: +91-90259-25808
Email: contact@tristarenergy.in