Solar tools / 01
Make your electricity bill a planning tool.
A practical first estimate for system size, savings, subsidy and payback—built around Tamil Nadu conditions.
Start with one number
Your monthly EB bill.
Tamil Nadu baseline
Local tariff, generation and current subsidy assumptions.
A decision aid
A useful range to begin a site-survey conversation.
Impact included
See the annual carbon offset alongside the financial return.
Your solar snapshot
Build your estimate in under a minute.
Choose the site type, adjust the few details you know, and use the live result to decide what to ask for in a detailed proposal.
Live estimate
Adjust your details to update the figures instantly.
Based on Tamil Nadu generation, tariff and current central subsidy assumptions.
Your estimate
5 kWp
Recommended system₹40,997
Annual savings₹78,000
PM Surya Ghar CFA4.8 years
Payback periodGross cost: ₹2,75,000
Net cost: ₹1,97,000
EMI estimate: ₹3,901 / month
CO2 offset: 5.58 tonnes/year · 251 trees equivalent
Explore loan options in detailHow we calculated this
System size estimated from monthly consumption using Tamil Nadu assumptions.
Annual generation = kWp x 8760 x 18% CUF.
Savings estimated at ₹5.2/kWh.
Subsidy/tax benefits applied based on selected audience mode.
Tariff used: ₹5.2/kWh
CUF used: 18%
Capex used: ₹55,000/kWp
Subsidy rates are set by the Government of India and Tamil Nadu state government. They can be revised without notice. Always verify current figures at pmsuryaghar.gov.in or teda.in before signing any agreement. Aadhi Solar will assist you in confirming the exact subsidy applicable to your installation.