Solar-ஐப் பற்றி
உங்களுக்கு இருக்கும் கேள்விகள்

A 3 kWp system — the most common size for a Tamil Nadu home — costs approximately ₹2,25,000 gross before subsidy. After the PM Surya Ghar subsidy of ₹78,000, your net cost is around ₹1,47,000.

Installed cost is roughly ₹75,000 per kWp. A 1 kWp system costs ~₹75,000, a 2 kWp system ~₹1,50,000, and a 3 kWp system ~₹2,25,000 — all before subsidy.

For a typical 3 kWp system with subsidy, the payback period is 3–5 years depending on your consumption and current bill. After payback, you get roughly 20 more years of near-free power.

Use our solar calculator to get your exact payback period based on your current TANGEDCO bill.

Savings depend entirely on your current bill and consumption pattern. A 3 kWp system generates around 495 units per month (assuming 5.5 peak sun hours, Tamil Nadu average).

If you currently pay ₹2,000–₹4,000/month, you can expect to save ₹1,500–₹3,500/month — roughly 80–90% of your bill. Use the calculator for your specific numbers.

In practice, your bill won't reach zero because TANGEDCO charges a fixed charge of ~₹125 bi-monthly regardless of net consumption. Also, if you use more power at night than your panels generate during the day, you'll draw some units from the grid.

With a well-sized system, most customers' bills drop to ₹100–₹400/month — compared to ₹2,000–₹5,000 before solar.

PM Surya Ghar Muft Bijli Yojana is a central government scheme that provides a direct subsidy for residential rooftop solar. The three fixed slabs are:

1 kWp system → ₹30,000 subsidy
2 kWp system → ₹60,000 subsidy
3 kWp and above → ₹78,000 subsidy (maximum)

This subsidy goes directly to the installer after commissioning — you pay only the net cost upfront.

After the system is commissioned and net metering is activated, the subsidy application is filed through the PM Surya Ghar portal. It typically takes 30–60 days for disbursement after approval.

We handle the entire subsidy filing process on your behalf — you don't need to interact with any government portal.

To be eligible for PM Surya Ghar subsidy:

• Must be a residential consumer (domestic tariff connection)
• Must install a grid-tied (not off-grid) rooftop solar system
• Must have a valid TANGEDCO connection in your name
• System must be installed by an MNRE-empanelled vendor (we are certified)

Net metering is a TANGEDCO arrangement where your solar panels can export surplus power back to the grid. When your panels produce more than you're using, the excess flows to the grid and TANGEDCO credits you.

Your bi-monthly bill is calculated as: Units consumed from grid − Units exported to grid. You're billed (or credited) only on the net difference.

Export credit rate: ₹3.61 per unit (TNERC 2021 order, fixed for systems up to 10kW).

After installation, we submit the net metering application to TANGEDCO. Approval typically takes 2–6 weeks depending on your division office.

During this period, your system generates power and reduces your consumption from the grid, but the bi-directional meter (which tracks exports) is not active yet. We follow up with TANGEDCO on your behalf until the net metering meter is installed.

TANGEDCO has a two-table slab system based on bi-monthly consumption:

Low usage (≤500 units bi-monthly): 0–100 free, 101–200 @ ₹2.35, 201–400 @ ₹4.70, 401–500 @ ₹6.30

High usage (>500 units bi-monthly): The entire bill is recalculated — 0–100 free, 101–400 @ ₹4.70, 401–500 @ ₹6.30, 501–600 @ ₹8.40, 601–800 @ ₹9.45, 801–1000 @ ₹10.50, 1001+ @ ₹11.55

Crossing the 500-unit threshold means your entire bill is recalculated at higher rates — not just the excess.

The entire process from enquiry to switch-on typically takes 3–5 weeks:

Week 1: WhatsApp enquiry → free estimate → site survey
Week 2–3: Panel and inverter procurement, roof mounting installation
Week 3–4: TANGEDCO net metering application, electrical inspection
Week 4–5: Bi-directional meter installation, system commissioned

Yes, solar can be installed on sheet roofs (asbestos, GI, or colour-coated). However, there are a few differences compared to RCC/terrace roofs:

• Generation is slightly lower (~5% less) due to heat conductivity and tilt constraints
• Special clamps are used instead of concrete ballasts
• We assess load-bearing capacity during the site survey to ensure safety

Solar panels require very minimal maintenance:

• Panel cleaning: Once every 1–2 months with water (dust on panels reduces generation by 5–10%)
• Inverter check: Annual inspection of the inverter display and connections
• No moving parts — nothing to service mechanically

We include free maintenance visits for the first year after installation. WhatsApp monitoring support is available anytime.

No — a standard grid-tied solar system shuts off during a power cut. This is a safety requirement: if TANGEDCO workers are repairing lines, your system must not be feeding power into the grid.

If you want power during cuts, you can add a battery storage system (hybrid inverter + lithium battery). This increases cost by ₹80,000–₹1,50,000 depending on storage capacity. Ask us about hybrid options.

Tamil Nadu's peak sun hours average 5.5 hours/day across the year. During monsoon months (Oct–Dec), generation drops to around 3.5–4.5 hours/day. You'll generate 20–30% less during those months.

Our savings estimates are based on the annual average — the summer months (Mar–Jun) compensate for the monsoon dip.

We use Tier-1 rated panels with:

• 25-year linear performance warranty — minimum 80% output at year 25
• 10-year product/manufacturing warranty — against defects
• Inverter: 5-year standard warranty (extendable to 10 years)

All warranties are from the panel manufacturer, not us — they remain valid even if we close.