SolarForceSolarForce
For Businesses & Industries

Commercial & Industrial Solar Calculator

Calculate ROI, payback period, and 25-year savings for your factory, warehouse, or commercial building

check_circleIRR & NPV Analysis
check_circle25-Year Cashflow
check_circleCAPEX & OPEX Models
kWh/month
₹/kWh

Regional default will be used

electric_boltQuick Estimate

Est. System Size
-- kW
Annual Gen.
-- kWh
Est. Investment
₹ --
Est. Annual Savings
₹ --

Calculation Assumptions & Methodology

wb_sunny

Solar Generation

  • Irradiance: 4.0-6.0 kWh/m²/day (Region specific)
  • Performance Ratio: 78% (System efficiency)
  • Degradation: 2% Year 1, 0.5%/year thereafter
  • System Life: 25 years
payments

Financial Parameters

  • EPC Cost: ₹48-52K/kW (Based on type)
  • O&M Cost: 1% of CAPEX/year
  • Tariff Escalation: 4%/year (Conservative)
  • Discount Rate: 10% (For NPV calculation)
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Space Requirements

  • Rooftop: ~100 sq.ft per kW
  • Ground-mounted: ~120 sq.ft per kW
  • Net Metering Limit: Typically 500 kW/1 MW
  • Panel Capacity: 540-550W modules

functionKey Formulas Used

System Capacity
kW = Annual_kWh / (Peak_Sun_Hours × 365 × PR)
Annual Generation
kWh = kW × Peak_Sun_Hours × 365 × PR × Degradation
NPV (Net Present Value)
NPV = -Investment + Σ(Cashflow_t / (1+r)^t)
LCOE (Levelized Cost)
LCOE = Total_Discounted_Cost / Total_Discounted_Energy