Demand charges – the fee a utility bills on a site's single highest 15-minute power draw, regardless of how much energy it actually sold – are the single most common reason DC fast-charging financial projections turn out wrong. Most templates fold them into a generic "utilities" line and hope for the best. This model gives demand charges their own dedicated tab, with a real coincidence factor and an optional battery-storage offset, so the cost structure that actually breaks charging-station economics is visible instead of hidden.
Three charger classes – Level 2, DC Fast 50kW, and DC Ultra-Fast 150kW – are modeled independently, each with its own real utilization ramp-up curve, and revenue is built separately by charger class from energy, idle-fee, and session-fee income. Grants & Incentives captures real 2026 Section 30C federal tax credit terms (30% of cost, capped at $100,000 per item) and NEVI corridor grant terms, plus a utility make-ready rebate line, so the capital stack reflects programs that actually exist today.
The Debt Service Coverage Ratio clears the 1.25x SBA 7(a) minimum in Year 1 at 3.14x, and stays above it through Year 3 (2.83x, then 3.02x) – computed from the demand-charge-adjusted revenue and Debt Schedule, not a static number. Staffing is sized the way real unattended charging sites actually run: capital-intensive and labor-light, not padded with a management layer the business doesn't need.
Twenty-six tabs: Start Here, Disclaimer, Help & FAQ, Assumptions, Charger Fleet & Utilization, Revenue Build, Demand Charges & Energy Costs, Grants & Incentives, Debt Schedule, Staffing & Payroll, CapEx & Depreciation net of grants, Operating Expenses, the three financial statements, an Actual vs. Budget Tracker, Break-Even Analysis, DSCR & Lender Ratios, a 22-ratio Full Ratio Suite, a DuPont ROE Decomposition, Scenario Analysis, Sensitivity Analysis, a Business Valuation & Exit tab with both an unlevered project IRR and a levered owner-equity IRR, an Executive Dashboard with revenue-per-port and cost-per-kWh KPIs, Funding Requirement, and Settings.
Built as a native .xlsx with standard formulas only, verified across Excel, Google Sheets, LibreOffice, WPS, and ONLYOFFICE. A planning tool built from sourced 2026 data, not tax, legal, or engineering advice.
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Source: Best Practices in Financial Modeling, Electric Vehicle Excel: EV Charging Station Financial Model Excel (XLSX) Spreadsheet, WebsiteGeek
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