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Energy Economics Suite

Professional-grade financial calculators for sustainable energy projects. Evaluate NPV, IRR, and LCOE to compare technologies and justify renewable investments.

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NPV & IRR Calculator

Cumulative Cash Flow

Methodology & Assumptions

NPV & IRR

  • • NPV = -Initial Investment + Σ(Annual Cash Flow / (1 + WACC)ᵗ)
  • • IRR found by bisection search (1% increments)
  • • Assumes constant annual cash flows
  • • Does not account for salvage value or working capital
  • • For variable cash flows, use a spreadsheet model

LCOE

  • • LCOE = NPV of all costs / Total lifetime energy output
  • • Costs discounted at user-specified rate
  • • Energy = Capacity Factor × 8760 hours × Lifetime
  • • No degradation or escalation assumed
  • • Currency-neutral: inputs and outputs in same units

Limitations

  • • These are simplified models for preliminary analysis. Detailed project finance requires Monte Carlo simulation, tax modeling, and debt structuring.
  • • LCOE benchmarks shown for reference only; actual costs vary by region, scale, and contract structure.
  • • IRR calculation uses discrete 1% steps and may not converge for highly irregular cash flows.
  • • All inputs are annual averages. Seasonal or monthly variations are not modeled.

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