EV Charger Installation Profitability Calculator

Article 625 (Electric Vehicle Charging System) is the primary code section. Key requirements: the EVSE (Electric Vehicle Supply Equipment) must be listed (UL 2594 or equivalent); the branch circuit must be rated at least 125% of the continuous load (a 32A charger requires a minimum 40A circuit; a 48A charger requires a minimum 60A circuit); an accessible disconnect must be within sight of the EVSE (satisfied by the circuit breaker in most residential applications); GFCI protection is required for all Level 2 EVSE in garages, outdoors, and accessible locations per Article 210.8. Article 210 (Branch Circuits) governs the 240V/50A or 240V/60A dedicated circuit required for Level 2 charging. Article 240 (Overcurrent Protection) governs the breaker sizing at 125% of the maximum EV charger rating.

A panel evaluation is required on every EV charger quote — the panel condition drives the total job scope and cost. Four scenarios: (1) 200A panel with available breaker space: no upgrade needed. Add a dedicated 50A or 60A breaker and run the circuit — 2-3 hours total. (2) 200A panel at capacity (no open slots): options are a tandem breaker if the panel allows, a circuit sharing device (EVEMS), or a subpanel addition. (3) 100A service with adequate slot space: the EV charger alone may not overload a 100A service if the home's baseline load is modest, but the customer needs to understand the capacity constraint. A service upgrade to 200A may be the appropriate recommendation. (4) 100A service at or near capacity: a service upgrade is required before EV charging can be safely added. Panel upgrade costs are entered separately in this calculator and passed through at cost — the calculator adds them to the job price without applying the labor margin to the panel materials (those should be bid separately at their own margin).

Do not give tax advice — always refer the customer to their tax advisor. That said, the relevant credit is IRS Form 8911 (Alternative Fuel Vehicle Refueling Property Credit), which as of the 2023 Inflation Reduction Act provides a 30% credit up to $1,000 for residential EV charging equipment installation (the credit applies to the total installed cost, including labor, up to $1,000). The credit applies to EVSE installed for personal use at the taxpayer's principal residence. Commercial property owners may qualify for a higher credit under Section 30C (up to 30% or $100,000 per location for business property). The credit is nonrefundable (it reduces tax liability but does not produce a refund) and requires Form 8911 filed with the federal return. Mention the potential credit in the customer conversation but direct them to their CPA for applicability to their specific tax situation.