Chennai homeowners installing an on-grid rooftop system cut their monthly electricity bill through a combination of direct self-consumption and net metering credits. System capacity typically falls between 1 kW and 5 kW, depending on roof space and monthly usage. A 3 kW system generates roughly 360 to 420 units a month in Chennai conditions. Residential installations qualify for the PM Surya Ghar: Muft Bijli Yojana subsidy of up to ₹78,000, which Nantech registers and claims on your behalf as a PM Surya Ghar empanelled vendor. Surplus generation during the day is credited against evening consumption through net metering, bringing your effective bill close to zero. Most homeowners recover their investment within 3 to 5 years, after which the system produces electricity at no recurring cost for 20-plus years.
| System Size | Approx. Monthly Units | Roof Area (Approx.) | Best Suited For |
|---|---|---|---|
| 1 kW | 120–140 units | 80–100 sq ft | Small home or low-consumption household |
| 3 kW | 360–420 units | 250–300 sq ft | Typical independent house in Chennai |
| 5 kW | 600–700 units | 400–500 sq ft | Large home or small office |
| 10 kW | 1,200–1,400 units | 800–1,000 sq ft | Commercial establishment or small industry |
As a registered PM Surya Ghar vendor, Nantech carries authorisations that unregistered installers cannot offer:
Every Nantech installation is specified from our multi-brand range based on your roof configuration, system size, and budget — not on a fixed package. Panels: Adani, Premier, Rayzon, and Waaree. Inverters: Growatt, Polycab, and Deye.
Call Us: +91 99623 98222 | 044-2486 1994 | sales@nantech.in