Construction & Architecture / Solar & Energy
Solar Lease vs Purchase Calculator
Implementation Specifications
This calculator is planned and documented. The formulas and guidance below are ready for implementation.
Required Inputs
- Lease: Monthly payment, Escalator, Term, Production guarantee
- Purchase: System cost, Tax credit, Interest rate, Loan term
- Both: Electricity rate, Annual rate increase
Formulas & Calculations
Lease total = Σ(Monthly payment × (1 + Escalator)^year) × 12 × Years
Purchase total = (System cost - Tax credit) or Loan total if financed
Lease savings = Production guarantee × Electricity rate × Years - Lease total
Purchase savings = Production × Electricity rate × Years - Purchase total
Net comparison = Purchase savings - Lease savings
Status: Specification complete, implementation pending
To implement: Create app/components/calculators/solar-lease-vs-purchase-calculator.tsx and register in app/lib/calculator-registry.ts