Frequently Asked Questions
Everything you need to know about solar energy and DVR Power Engineering's services in Tamil Nadu.
At DVR Power Engineering, we handle Industrial, Commercial, Residential, and Educational Institution solar installations across Tamil Nadu. From factory rooftops to home systems, we deliver end-to-end solar solutions as an Authorised Channel Partner of TATA Power Solar.
Solar panels generate free electricity from sunlight, reducing your dependence on TNEB grid power. With net metering, excess power is exported to the grid, earning you credits. Our clients have reported electricity bill savings of up to 60% after installation.
Most residential systems have a payback period of 3–5 years and commercial/industrial systems 4–6 years. With a system lifespan of 25+ years, you enjoy over 20 years of virtually free electricity after recovering your investment.
Yes! Under the PM Surya Ghar Muft Bijli Yojana, residential customers get up to 40% subsidy on systems up to 3 kW. Businesses can claim accelerated depreciation benefits. DVR Power Engineering handles all subsidy paperwork on your behalf.
Electricity is one of the biggest operational costs for businesses. Solar helps you cut costs immediately, claim 40% accelerated depreciation in Year 1, strengthen your ESG credentials, and protect against rising EB tariffs — making now the best time to switch.
We offer 25-year panel performance warranty (TATA Power Solar), inverter warranty up to 10 years, and workmanship warranty on installation. We also provide Annual Maintenance Contracts (AMC) covering cleaning, inspections, and performance monitoring.
Very little! Solar panels need periodic cleaning (every 1–3 months), an annual system inspection, and occasional inverter monitoring. There are no moving parts, no fuel, and no major servicing costs — making solar the lowest-maintenance energy system available.
An on-grid solar system connects your panels directly to the TNEB grid. Solar power runs your appliances first; surplus goes to the grid via net metering, and any shortfall is drawn from the grid. It's the most popular and cost-effective solar setup — no batteries needed.
Absolutely. Solar panels work on light, not just heat, making them effective across all Indian climates — coastal, hilly, or tropical. Tamil Nadu, with 5–5.5 peak sun hours daily, is one of India's best regions for solar energy.
Yes! Panels generate 10–25% of peak power even on cloudy or rainy days. Tamil Nadu's monsoon is intermittent, so sunny spells continue to generate power. Plus, rain naturally cleans your panels, boosting efficiency after the monsoon season.
A 1kW solar panel system produces approximately 4 to 5 units (kWh) of electricity per day in Tamil Nadu, thanks to its high solar irradiance. That adds up to roughly 120–150 units per month and 1,400–1,800 units per year. Actual output depends on sunlight availability, panel orientation, and shading.
A 1kW solar panel system requires approximately 80 to 100 square feet (7–10 sq. meters) of shadow-free rooftop space. For a standard 3kW home system, you'd need around 250–300 sq. ft. Our team at DVR Power Engineering conducts a free site assessment to find the best layout for your roof.
A hybrid solar system combines the benefits of both on-grid and off-grid systems. It connects to the TNEB grid for net metering savings while also storing excess power in batteries for use during power cuts or nighttime.
- Solar panels generate power during the day
- Excess power charges the battery bank
- During outages or at night, the battery supplies power
- The grid acts as backup when both solar and battery fall short
An off-grid solar system operates completely independent of the TNEB grid. Power is generated by solar panels, stored in batteries, and used as needed — making it perfect for remote locations, farms, or areas with no grid connectivity.
- Solar panels generate DC power during the day
- A charge controller regulates battery charging
- Batteries store power for night or cloudy days
- An inverter converts stored DC power to AC for appliances
