Solar & Battery Costs in Tamil Nadu, India System Prices & Installers
Design solar and battery systems for Tamil Nadu using Photonik's professional design platform. Tamil Nadu is India's second-wealthiest state with a GSDP of ₹31.55 lakh crore and has 10,571 MW of solar capacity. The state offers ₹20,000 per kW subsidy under the Chief Minister's Capital Subsidy Scheme, in addition to central subsidies.
ℹ️ Get quick estimates for solar and battery sizing, costs, and savings in Tamil Nadu using these simplified calculators. For more accurate, advanced calculations, use the full Photonik design platform.
Solar Design Tamil Nadu
Energy Usage
Energy consumption patterns in Tamil Nadu reflect the state's tropical climate, with high cooling needs during hot summers and moderate usage during cooler months. The average Tamil Nadu household uses between 8-12 kWh per day, with Chennai and coastal properties typically consuming more for cooling during hot summers. Energy-efficient properties throughout Tamil Nadu often use significantly less through modern insulation, efficient cooling systems, and smart home technologies.
Before installing solar, consider reducing your energy consumption through improved insulation and energy-efficient appliances. This is particularly valuable in Tamil Nadu, where the Chief Minister's Capital Subsidy Scheme provides ₹20,000 per kW, making solar more affordable, and reducing consumption can lower required system size and improve returns.
Typical energy usage per person per day in Tamil Nadu:
Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.
Solar System Sizing
You'll need around 3.9kW of solar to match your average consumption in Tamil Nadu. We recommend sizing between 5.9kW and 7.9kW for optimal results, accounting for daily and seasonal variations. Tamil Nadu enjoys excellent solar potential, with most regions averaging 4.5-5.5 kWh/kW/day annually, with consistent generation throughout most of the year.
A 6.6 kW system in Tamil Nadu generates approximately 30.2 kWh daily on average, with seasonal variation from 4.19 kWh/kW/day in December to 4.92 kWh/kW/day in September. Tamil Nadu's excellent solar irradiance, combined with state subsidies and strong solar capacity (10,571 MW), makes solar particularly attractive for homeowners.
Solar & Energy Savings
Calculate Heat Pump & EV Savings
Electrify your home by replacing gas heating, petrol vehicles, and other fossil fuel appliances with electric alternatives powered by clean solar energy. This delivers significant additional financial savings and substantial carbon emission reductions. Our calculator helps you compare costs and model the financial impact of switching to electric appliances and vehicles.
How Solar Reduces Your Electricity Bills
The calculations below show how your electricity bills change with solar. Your Old Bill of - per month (- annually) is calculated from your total energy consumption multiplied by the grid electricity rate. Your New Bill of - per month (- annually) accounts for solar generation, the percentage you use directly (self-consumption), remaining grid consumption, and feed-in credits for excess energy exported to the grid. This results in monthly savings of - (- annually).
Battery Storage Tamil Nadu
Solar Battery Sizing
With solar-only (no battery), a 6.6 kW system provides approximately 50% self-usage in Tamil Nadu, depending on your consumption patterns, drawing 50% from the grid. Adding a 10 kWh battery increases energy independence to approximately 99% annually, reducing grid reliance to 1%. Battery storage is valuable in Tamil Nadu, allowing you to store excess daytime generation for evening use and providing backup power during frequent power cuts.
Net metering policies vary by distribution company in Tamil Nadu, with rates typically ranging from ₹2-6 per kWh. Battery storage is particularly valuable given frequent power cuts, providing backup power during outages. Tamil Nadu's strong solar capacity (10,571 MW) reflects the state's commitment to renewable energy. For accurate battery savings and ROI calculations specific to your location and distribution company, use the full Photonik design tool.
Energy Self Sufficiency Calculator*
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour simulations that account for solar generation patterns, consumption timing, battery charging/discharging cycles, and efficiency losses across all seasons, use the full Photonik design tool.
Panel Placement Tool Tamil Nadu
This is a simple panel placement tool that lets you quickly estimate panel count for a single roof area. Try Photonik for advanced features:
- Multiple panel groups
- Custom roof angles
- Panel orientation
- Shade loss calculations
- Panel selection (1000+ models)
- Full integration with our design tool
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Solar & Battery System Cost Tamil Nadu
Understanding Solar & Battery System Costs
A 6.6 kW solar system in Tamil Nadu costs approximately ₹493,284, while adding a 10 kWh battery increases the total to around ₹994,849. Tamil Nadu offers ₹20,000 per kW subsidy under the Chief Minister's Capital Subsidy Scheme, in addition to central subsidies up to ₹78,000. Solar-only systems typically pay for themselves in around 8.4 years in Tamil Nadu, whilst adding battery storage usually extends payback but significantly improves energy independence. Tamil Nadu's combination of excellent solar potential, state subsidies, and economic strength makes solar particularly attractive, with many systems achieving payback in under 5-7 years.
The cost breakdown shows estimates for equipment costs, installation labour, and applicable taxes. Adjust system size and battery storage to see how it affects total investment and payback periods. Tamil Nadu has excellent installer coverage, with qualified installers operating throughout Chennai, Coimbatore, and regional areas, providing competitive pricing and quality installations.