For planning, the model treats 80% of the monthly bill as energy charges, uses 1,500 kWh per kWp/year, targets solar generation at 80% of estimated site demand, and applies an indicative rooftop EPC budget of ₹45,000–₹70,000 per kWp depending on facility type. No subsidy, battery, financing, export credit or tax benefit is assumed.
25-year gross savings assume 3% annual tariff escalation and 0.5% annual panel degradation; they exclude O&M and financing costs. Actual generation, tariffs and turnkey prices vary by location, roof condition, DISCOM rules, equipment and scope. This is a preliminary estimate, not a vendor quote.
Estimates update with your bill, energy tariff, facility type and usable site area.
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