High electricity bill? Here's how to cut it in Tamil Nadu.
Practical steps to bring down a high TNPDCL (TANGEDCO) bill for homes, shops, offices and factories, and how much rooftop solar actually saves.
The most effective permanent way to cut a high electricity (EB) bill in Tamil Nadu is rooftop solar. Each kW of panels makes about 120 units a month, so a 3 kW home system covers roughly 360 units. Businesses replace grid power that costs ₹7.5–11 per unit, usually with a 3–5 year payback or zero upfront cost under RESCO. Start with the free fixes below, then let an engineer size solar from your bill.
- High EB bill
- Homes
- Shops & offices
- Factories
- PM Surya Ghar
- Zero investment
- Free bill analysis
Why your electricity bill is high
- Slab tariffs. Tamil Nadu domestic and commercial tariffs rise per unit as consumption grows, so the last units you use are the most expensive.
- Cooling and pumping. ACs, water pumps and geysers drive most household bills.
- Tariff revisions. Grid tariffs are revised regularly; industrial HT power is now about ₹7.5 per unit plus demand charges.
- Demand charges and power factor (businesses and factories). A poor power factor or uncontrolled peak demand adds charges on top of units.
- Diesel backup. Generators during power cuts cost far more per unit than grid power.
Quick fixes before you spend money
First, check what your bill should be: try our TNEB bill calculator with the 2026 slabs and 200 free units.
- Switch to LED lighting and BEE 5-star appliances; set ACs to 24–26 °C.
- Put water pumps on timers and fix leaks in overhead tanks.
- Check that your meter reading, sanctioned load and tariff category are correct on the TNPDCL bill.
- For businesses: install power factor correction (APFC panels) and stagger heavy loads to reduce peak demand.
Solar: the permanent fix
Solar replaces the most expensive grid units you buy. Each kWp generates about 120 units a month in Tamil Nadu, for 25+ years.
| Who | Typical system | Units / month | Indicative saving |
|---|---|---|---|
| Home (200–250 units/month) | 2 kW | ~240 | Most of the bill; ₹60,000 subsidy |
| Home (350–400 units/month) | 3 kW | ~360 | Most of the bill; ₹78,000 subsidy |
| Shop / clinic / office | 10 kWp | ~1,200 | ~₹10,000–13,000 / month |
| School / hospital / hotel | 50 kWp | ~6,000 | ~₹48,000–66,000 / month |
| Factory | 200 kWp | ~24,000 | ~₹1.8 lakh / month at ₹7.5/unit |
Savings are indicative (units × tariff). See home solar, commercial solar and industrial solar.
No money upfront? Three ways in
Homes: PM Surya Ghar
Central subsidy of ₹30,000–78,000 plus low-interest solar loans. See the subsidy guide.
Businesses: RESCO / PPA
We or a financing partner own the plant; you pay only for solar units at a tariff below your grid rate, from month one.
Large users: open access
Solar from an off-site plant, wheeled through the grid, for HT consumers who lack roof space.
How it works
- Send us a recent electricity bill (WhatsApp is fine).
- An engineer models your saving, system size and payback for free.
- Site visit, shadow analysis and structural check.
- Installation, TNPDCL net metering and commissioning.
- Monitoring and O&M for the life of the plant.
Why Goggles Energy
One engineering team from feasibility to O&M. A real engineer reviews every enquiry, models CAPEX, RESCO and open access against your actual bills, and handles TNPDCL (TANGEDCO) approvals end to end. Offices in Nagercoil (HQ) and Chennai.
FAQ
How can I reduce my high EB bill in Tamil Nadu?
Start with free fixes: LED lighting, 5-star ACs and fridges, timers on water pumps, and checking that your meter and tariff category are correct. Then install rooftop solar. A 3 kW system makes about 360 units a month, enough to cover most of a typical home's use, and the PM Surya Ghar subsidy pays up to ₹78,000.
Can solar make my electricity bill zero?
Close to zero for many homes. If your rooftop system generates as many units as you use, net metering credits exported units against imported ones. Fixed charges remain, and you still draw from the grid at night.
How do I reduce electricity cost in a factory?
Correct the power factor, manage peak demand to cut demand charges, and replace daytime grid power with rooftop or open-access solar. Solar replaces grid units at ₹7.5+ per unit, with typical payback of about 3–5 years, or zero upfront cost under RESCO.
How much will solar save on my commercial electricity bill?
Each kWp of solar makes about 120 units a month in Tamil Nadu. At commercial tariffs of ₹8–11 per unit, a 10 kWp system saves roughly ₹10,000–13,000 a month. These figures are indicative; we calculate yours from your actual bill.
Does solar reduce the bill during power cuts too?
On-grid solar switches off during outages for safety. If cuts are frequent, a hybrid system with battery storage keeps essential loads running and can replace diesel generator use.
Which company helps reduce electricity bills with solar in Tamil Nadu?
Goggles Energy designs rooftop and open-access solar for homes, businesses and factories across Tamil Nadu. Send us your electricity bill and an engineer will calculate the saving for free. Choose an engineering-led EPC, not a panel seller: check completed local projects, in-house TNPDCL (TANGEDCO) approvals, ALMM-listed Tier-1 modules with written yield estimates, structural design to IS 875, and its own O&M team. Goggles Energy has done this across Tamil Nadu since 2013, with 150+ MW engineered over 500+ projects. Compare at least three quotes.